JP7761566B2 - Spray guide and spray device - Google Patents

Description

The present invention relates to spray guides and apparatus for defining the shape of a marking fluid sprayed onto a surface. The present invention relates primarily, but not exclusively, to apparatus for spraying lines onto surfaces such as roads, parking lots, factory and gym floors, sports courts and playing areas, playgrounds, and sports fields. The present invention further relates to wheeled line drawing apparatus and components thereof, including an aerosol actuation device and a stabilization and line width adjustment mechanism.

Known spray or marking devices include a conventional aerosol of marking fluid (without a dip tube) that is mounted inverted on a wheeled carriage so that when the aerosol nozzle is triggered to open, the marking fluid is sprayed downward as a line on the surface over which the device is traveling.

One problem associated with such devices is that the sprayed line may lack sharp edge definition due to the pattern and distribution of the marking fluid as sprayed. Typically, this has been controlled by some form of spray guide, mask, or shield to limit lateral spray of the marking fluid. However, such spray guides, masks, or shields can accumulate "droplets" of the sprayed marking fluid, which can then spill outside the sprayed line.

Another problem associated with such devices is a lack of lateral stability. The simplest line-drawing devices include a pair of wheels between which the line-drawing fluid is sprayed. The wheels set the line width and therefore lack lateral stability when they are close together. This can cause the carriage to "rock" as it travels, resulting in, for example, a meandering line. Adding stabilizing wheels can limit the ability to spray a line close to a wall or other similar obstacle.

A further problem is that aerosols are typically operated by positioning the spray nozzle in a fixed mount and then pressing the body of the aerosol can downwards against the mount to open the spring-loaded nozzle valve. This can result in the accidental discharge of aerosol when, for example, even a small downward force is accidentally applied to the aerosol can when the spray device comes into contact with an irregularity in or on the surface being sprayed.

It is therefore an object of the present invention to improve a spray guide or mask that defines the shape of a marking fluid when sprayed onto a surface. A further object of the present invention is, for example, to provide a spray guide or mask that is easy to clean. In some aspects of the present invention, it is an object to provide a spray guide or mask that is easy to repair. In some aspects of the present invention, it is an object to provide a spray device that is capable of drawing lines with sharper edges on a surface. In some aspects of the present invention, it is an object to provide a spray device that reduces waste of sprayed fluid, etc.

Another object of the present invention is to improve the stabilization of wheeled wire drawing devices by improving their handling, particularly by providing better stability on uneven surfaces.

An aspect of the present invention provides a spray guide for use in a spray device to define the shape of marking fluid when sprayed onto a surface, the spray guide comprising a flexible portion.

This allows a portion of the spray guide, particularly the flexible portion, to be positioned closer to or even in contact with the surface being sprayed, which has the advantage of reducing the gap between the spray guide and the surface being sprayed. This allows for a line with sharper edges to be sprayed. Furthermore, the spray guide may be easier to clean, less susceptible to damage during use, etc.

In certain embodiments, the flexible portion of the spray guide is disposed at least in the portion of the spray guide that is closest to the surface to be sprayed during operation.

This reduces the gap between the surface being sprayed and the spray guide, which has the advantage of producing sharper edges in the sprayed line.

In certain embodiments, the spray guide includes an engagement mechanism that allows for releasable engagement with the spray device or the masking plate of the spray device.

That is, in certain embodiments, the spray guide includes an engagement mechanism. The engagement mechanism can allow for releasable engagement with the spray device. The engagement mechanism can allow for releasable engagement with the spray device and the masking plate.

In some embodiments, the engagement mechanism for detachably engaging the spray guide to the spray device or the spray device's masking plate includes an aperture. The aperture can be configured to receive one or more corresponding pegs on the spray device or the spray device's masking plate. In some embodiments, the engagement mechanism for detachably engaging the spray guide to the spray device or the spray device's masking plate includes a threaded aperture. The threaded aperture can be configured to receive one or more corresponding threaded pegs, bolts, etc. on the spray device or the spray device's masking plate. In some embodiments, the engagement mechanism for detachably engaging the spray guide to the spray device or the spray device's masking plate includes a push-fit mechanism, a friction-fit mechanism, or a snap-fit mechanism.

This has the advantage that the spray guide can be easily replaced for maintenance, cleaning or repair.

In certain embodiments, the flexible portion slopes inward toward the surface being sprayed.

In certain embodiments, the flexible portion slopes inward toward the marking fluid path during use. In certain embodiments, the flexible portion slopes on the side of the flexible portion that faces the spray. That is, in certain embodiments, an angle is formed between the flexible portion and the vertical line, i.e., the longitudinal axis. This angle can be considered the slope angle. In certain embodiments, the surface of the flexible portion slopes inward. In certain embodiments, the surface of the flexible portion slopes inward toward the marking fluid path during use. In certain embodiments, the surface of the flexible portion slopes on the side of the flexible portion that faces the spray.

This has the advantage that the marking fluid can be directed more precisely, resulting in sharper edges in the sprayed line.

In certain embodiments, the flexible section is tilted between 0 and 20 degrees from the vertical. That is, the flexible section forms an angle or tilt angle between 0 and 20 degrees relative to the vertical or longitudinal axis. That is, the flexible section can form an angle or tilt angle between 0 and 20 degrees (excluding both 0 and 20 degrees).

In certain embodiments, the flexible portion is tilted at an angle between 0 and 20 degrees. In some examples, the flexible portion is tilted at an angle between 0 and 20 degrees (excluding 0 degrees and including 20 degrees). The tilt angle may have a lower limit of 0, 5, 10, or 15 degrees, or any integer value therebetween. The tilt angle may have an upper limit of 5, 10, 15, or 20 degrees, or any integer value therebetween. In some examples, the flexible portion can be tilted at an angle between 0, 5, 10, 15, or 20 degrees, or any integer value therebetween.

In certain embodiments, the flexible portion is inclined 5 degrees from the vertical. In certain embodiments, the side of the flexible portion facing the spray is inclined 5 degrees from the vertical. In certain embodiments, the flexible portion is inclined 5 degrees from the vertical on one side of the flexible portion.

This has the advantage that the marking fluid can be directed more precisely, resulting in sharper edges in the sprayed line.

In certain embodiments, the flexible portion comprises at least one tooth.

The teeth may be any protrusions that, in use, extend generally downwardly towards the area to be sprayed. In other words, at least one tooth extends generally downwardly in use. Suitably, the at least one tooth is positioned on a lower edge of the flexible portion, extending generally downwardly. In some embodiments, the flexible portion comprises at least one tooth disposed on a lower portion of the flexible portion. In some embodiments, the spray guide comprises at least one tooth disposed on a lower portion of the spray guide.

This provides the advantage of reducing the gap between the surface being sprayed and the spray guide. For example, paint can be allowed to flow continuously from the spray guide to the ground, thereby providing a uniform amount of marking fluid on the surface. Furthermore, the tines come into contact with the surface being sprayed during use, thereby eliminating the gap and/or allowing the marking fluid to brush the surface being sprayed. The tines therefore result in sharper edges in the sprayed line.

In certain embodiments, the flexible portion comprises a plurality of teeth.

In some embodiments, the flexible portion has three teeth. In some embodiments, the flexible portion has five teeth. In some embodiments, the flexible portion has seven teeth. In some embodiments, the flexible portion has one to ten teeth. In some embodiments, the flexible portion has three to seven teeth.

In certain embodiments, the teeth extend from the underside, surface or face of the flexible portion towards the surface to be sprayed. In some embodiments, the flexible portion comprises a plurality of teeth disposed on a lower portion of the flexible portion. In some embodiments, the spray guide comprises a plurality of teeth disposed on a lower portion of the spray guide. In some embodiments, the teeth are arranged in rows. In some embodiments, the teeth protrude from a lower edge of the flexible portion or the body of the spray guide. Suitably, the rows of teeth can be arranged in rows such that the teeth are arranged front to back, the rows of teeth having a longitudinal axis parallel to the direction of travel in use.

This provides the advantage that the marking fluid is distributed along two or more regions of the flexible portion, providing a uniform amount of marking fluid along multiple regions of the flexible portion, which results in sharper edges in the sprayed line. Each tooth can hold a certain amount of marking fluid.

In certain embodiments, the teeth are of equal vertical length, i.e., each tooth or teeth may have equal or substantially equal vertical lengths relative to the other teeth, i.e., identical or substantially identical.

In certain embodiments, the teeth have different vertical lengths, i.e., each tooth or teeth may have an unequal, non-identical, or different vertical length relative to the other teeth.

In some embodiments, the teeth are equal in length; in other words, they protrude an equal distance from the flexible portion or body of the spray guide.

In some embodiments, the teeth are unequal in length. In other words, at least one tooth of the plurality of teeth protrudes a different distance from the flexible portion or body of the spray guide than at least one other tooth.

In certain embodiments, one or more central teeth are provided that are longer, in a direction perpendicular to the direction of travel in use, than the teeth or teeth at the front or rear end of the flexible section.

That is, one or more central teeth may be provided with a first tooth or first set of teeth at the front end and a second tooth or second set of teeth at the rear end. The front end refers to the end of the flexible portion closest to the front in the direction of travel during use. The rear end refers to the end of the flexible portion farthest from the front in the direction of travel during use. The term "flanked" refers to one or more central teeth having adjacent teeth on each side of the one or more central teeth.

In certain embodiments, the flexible portion has three teeth, with the central tooth being longer than the other two teeth. In some embodiments, the flexible portion has five teeth, with the central tooth being longer than the other four teeth. In some embodiments, the flexible portion has five teeth, with the three central teeth being longer than the front teeth and longer than the rear teeth in the row of teeth.

In certain embodiments, the plurality of teeth is defined along a longitudinal axis extending in the normal direction of travel of the spray device in use, and the plurality of teeth includes at least one central tooth flanked by at least one peripheral tooth at the front and rear ends, with the or each central tooth having a greater vertical length than each peripheral tooth at the front and rear ends. The front end refers to the end of the flexible portion closest to the front relative to the direction of travel in use. The rear end refers to the end of the flexible portion furthest from the front relative to the direction of travel in use. The term "flanked" refers to at least one central tooth having one or more adjacent teeth on each side of the at least one central tooth.

This provides the advantage that, in embodiments having a relatively long central tooth or teeth, marking fluid can be directed to the longer teeth if the marking fluid is directed primarily to the center of the flexible portion.

This has the advantage that if less marking fluid is applied to the outer teeth, which are more likely to dry out compared to the central tooth or teeth, the shorter outer teeth are less likely to come into contact with the applied marking fluid, which could cause unsightly nicks or imperfections.

In certain embodiments, the tooth or teeth are elastically deformable, flexible, etc.

This has the advantage that the teeth can bend and follow the contours of the surface being sprayed.

In certain embodiments, one or more or each tooth slopes inward toward the surface being sprayed.

In certain embodiments, the tooth, some or each tooth is inclined inwardly toward the marking fluid path during use. In certain embodiments, the tooth, some or each tooth is inclined on a side of the flexible portion that faces the spray. That is, in certain embodiments, an angle is formed between the tooth, some or each tooth and a vertical line, i.e., the vertical or longitudinal axis of the tooth. This angle can be considered an inclination angle. In certain embodiments, the surface of the tooth, some or each tooth is inclined inwardly. In certain embodiments, the surface of the tooth, some or each tooth is inclined inwardly toward the marking fluid path during use. In certain embodiments, the surface of the tooth, some or each tooth is inclined on a side of the tooth that faces the spray.

This has the advantage that the marking fluid can be directed more precisely, resulting in sharper edges in the sprayed line.

In certain embodiments, the tooth, some teeth, or each tooth is inclined from the vertical at an angle between 0 and 20 degrees. That is, the tooth forms an angle between 0 and 20 degrees with respect to the vertical or longitudinal axis. That is, the tooth can form an angle or inclination between 0 and 20 degrees (excluding both 0 and 20 degrees).

In certain embodiments, a tooth, some teeth, or each tooth is inclined at an angle between 0 and 20 degrees. In some examples, a tooth, some teeth, or each tooth is inclined at an angle between 0 and 20 degrees (excluding 0 degrees and including 20 degrees). The inclination angle of a tooth, some teeth, or each tooth may have a lower limit of 0, 5, 10, or 15 degrees, or any integer value therebetween. The inclination angle of a tooth, some teeth, or each tooth may have an upper limit of 5, 10, 15, or 20 degrees, or any integer value therebetween. In some examples, a tooth, some teeth, or each tooth may be inclined at an angle of 0, 5, 10, 15, or 20 degrees, or any integer value therebetween.

In certain embodiments, one, some, or each tooth is inclined 5 degrees from vertical. In certain embodiments, one, some, or each tooth is inclined 5 degrees from vertical on the side of the flexible portion facing the spray. In certain embodiments, one, some, or each tooth is inclined 5 degrees from vertical on one side of the flexible portion.

This has the advantage that the marking fluid can be directed more precisely, resulting in sharper edges in the sprayed line.

In some embodiments, one tooth, some teeth, or each tooth comprises a non-stick material.

In certain embodiments, one, some, or each tooth comprises a silicone. In certain embodiments, one, some, or each tooth comprises a silicone material.

In some embodiments, the flexible portion comprises a non-stick material.

In certain embodiments, the flexible portion comprises a silicone material. In certain embodiments, the flexible portion comprises a silicone material.

In certain embodiments, the silicone material includes cured silicone rubber.

In embodiments in which the tooth, some or each tooth, the flexible portion, or both the tooth, some or each tooth and the flexible portion comprise a non-stick material, such as silicone, this provides a continuous flow of marking fluid onto the surface being sprayed, as less marking fluid adheres to or on the tooth, some or each tooth, the flexible portion, or both the tooth, some or each tooth and the flexible portion, which has the advantage of providing a more uniform application of the marking fluid and resulting in sharper edges for the lines drawn on the surface.

In embodiments in which the tooth, some or each tooth, the flexible portion, or both the tooth, some or each tooth and the flexible portion comprise a non-stick material, such as silicone, this prevents marking fluid from drying on the tooth, some or each tooth, the flexible portion, or both the tooth, some or each tooth and the flexible portion, and therefore allows dried marking fluid to be easily removed from the flexible portion or tooth by mechanical means, such as by scraping or bending, thereby providing the advantage of reducing the use of cleaning chemicals.

In embodiments in which the tooth, or several or each tooth, or the flexible portion, or both the tooth, or several or each tooth, and the flexible portion comprise a material with low surface energy, such as silicone, this provides the advantage that the marking fluid does not wet the surface of the tooth, or each tooth, or the flexible portion, or both the tooth, or each tooth, and the flexible portion, and therefore does not flow off the tooth or flexible portion and spread across the surface, which would otherwise accelerate drying of the marking fluid. This has the advantage that the buildup of dried marking fluid on the tooth, or each tooth, or the flexible portion, or both the tooth, or each tooth, and the flexible portion, is reduced, and the performance of these parts and features is more consistent over long periods between cleanings. This results in sharper line edges on the surface over long periods of device operation.

In some embodiments, the tooth, some of the teeth, or each tooth comprises a flexible material. In some embodiments, the tooth, some of the teeth, or each tooth is flexible. In some embodiments, the flexible material has a Shore A hardness of 60.

In certain embodiments, the silicone material has a Shore A hardness of 60. That is, the tooth or each tooth may comprise a silicone material having a Shore A hardness of 60. Additionally or alternatively, the flexible material may comprise a silicone material having a Shore A hardness of 60.

This has the advantage that the tooth, several teeth, or each tooth, the flexible portion, or both the tooth, several teeth, or each tooth and the flexible portion have good rigidity, allowing the silicone part to be well attached to the spray guide. Furthermore, the silicone part is easy to clean, as it can bend to remove dried marking fluid, thereby reducing the need for cleaning chemicals.

In certain embodiments, the spray guide further comprises at least one fin. In certain embodiments, the fin may be of the same material as the spray guide. Alternatively, in some embodiments, the fin may be of a different material than the spray guide. In some embodiments, the at least one fin extends from the spray guide perpendicularly from one side of the spray guide. In some embodiments, the at least one fin extends perpendicularly from the marking fluid side of the spray guide.

This provides the advantage that, during use, marking fluid that would not normally be directed toward the surface being sprayed is directed toward the flexible material and, therefore, toward the surface being sprayed. Therefore, waste of marking fluid is reduced. Furthermore, the fins contribute to providing a continuous flow of marking fluid, so that the marking fluid does not dry out on the flexible portion. The continuous flow of fluid toward the surface being sprayed results in a more even application of the marking fluid and sharper edges for the lines drawn on the surface.

In certain embodiments, at least one fin has a triangular shape. In alternative embodiments, the fin has other shapes, such as a rectangle, a semicircle, or a square.

This has the advantage that the marking fluid can be precisely directed to a specific area, optimizing the flow of marking fluid toward the surface being sprayed.

In certain embodiments, at least one fin is located on the spray-facing side of the spray guide.

In certain embodiments, the spray guide has two fins. Advantageously, a spray guide with two fins helps direct the marking fluid to the correct area.

In certain embodiments, at least one fin extends vertically from the spray guide, with the at least one fin extending vertically along the spray-facing side of the spray guide in the orientation of the spray guide in use. That is, in certain embodiments, the at least one fin extending from the spray guide is substantially coaxial with a vertical line, i.e., the longitudinal axis. That is, the at least one fin extends outward from the spray guide.

In certain embodiments, at least one fin extends vertically from the flexible portion, with the at least one fin extending vertically along the spray-facing side of the flexible portion in the orientation of the flexible portion in use. That is, in certain embodiments, the at least one fin extending from the flexible portion is substantially coaxial with the vertical or longitudinal axis. That is, the at least one fin extends outward from the at least one flexible portion.

In certain embodiments, at least one fin extends vertically at an angle from the horizontal.

This provides the advantage that a continuous or steady stream of marking fluid is applied to the flexible portion as the marking fluid is collected by the at least one fin and directed towards the flexible portion.

In certain embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal. That is, at least one fin extends substantially vertically and forms an angle between 60 and 70 degrees with respect to the horizontal, i.e., a vertical line or a transverse axis perpendicular to the longitudinal axis. The angle formed may include 60 degrees. The angle formed may exclude 60 degrees. The angle formed may include 70 degrees. The angle formed may exclude 70 degrees. In some embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal.

In one particular embodiment, at least one fin extends vertically at 68 degrees from the horizontal.

This provides the advantage that the marking fluid is directed toward the flexible portion in a continuous or steady manner at an improved flow rate.

In certain embodiments, the flexible portion is integrally formed within the spray guide.

Aspects of the present invention also provide a masking plate comprising the spray guide described herein.

An aspect of the present invention further provides a spraying device including the masking plate described herein or the spray guide described herein.

An aspect of the present invention further provides a spray device that defines the shape of marking fluid when sprayed onto a surface, the spray device comprising a nozzle through which the marking fluid is sprayed and at least one masking plate that defines the edge of the sprayed marking fluid sprayed from the nozzle, the at least one masking plate comprising a flexible portion.

This allows a portion of the masking plate, particularly the flexible portion, to be positioned closer to or even in contact with the surface being sprayed, which has the advantage of reducing the gap between the masking plate and the surface being sprayed. This allows for a line with sharper edges to be sprayed. Furthermore, the device may be easier to clean, less susceptible to damage during use, etc.

In certain embodiments, the spray device comprises a spray guide as described herein, e.g., a spray guide comprising a flexible portion.

In certain embodiments, the flexible portion, in use, is positioned on the masking plate at the portion of the masking plate closest to the surface to be sprayed.

This reduces the gap between the surface being sprayed and the masking plate, which has the advantage of producing sharper edges in the sprayed line.

In certain embodiments, the flexible portion is at least part of a member that is releasably engaged with at least one masking plate.

This has the advantage that the masking plate can be easily replaced for maintenance, cleaning or repair.

In some embodiments, the separable engagement mechanism that releasably engages the flexible portion to the masking plate comprises a peg. In some embodiments, the separable engagement mechanism that releasably engages the flexible portion to the masking plate comprises an opening. In some embodiments, the separable engagement mechanism that releasably engages the flexible portion to the masking plate comprises a threaded opening. In some embodiments, the separable engagement mechanism that releasably engages the flexible portion to the masking plate comprises a push-in mechanism, a friction-fit mechanism, or a snap-fit mechanism.

In certain embodiments, the spray device includes two masking plates, each of which includes a flexible portion.

In certain embodiments, the spray device includes two masking plates, each of which includes a spray guide as described herein, e.g., a spray guide including a flexible portion.

This has the advantage of increasing the sharpness of the edges of the sprayed line.

In certain embodiments, during manufacture of the spray device and/or the spray device's masking plate, flexible portions can be manufactured depending on the orientation of the masking plate when mated to the spray device, so that the masking plate can be mated to either side of the marking fluid spray path in use. This allows for ease of manufacture regardless of whether the spray mask is mated to the left or right side of the marking fluid spray path, for example.

In certain embodiments, at least one masking plate includes at least one fin. In certain embodiments, the fin may be of the same material as the masking plate. Alternatively, in some embodiments, the fin may be of a different material than the masking plate. In some embodiments, the at least one fin extends from the masking plate in a vertical direction from one side of the masking plate. In some embodiments, the at least one fin extends vertically from the marking fluid side of the masking plate.

This provides the advantage that, during use, marking fluid that would not normally be directed toward the surface being sprayed is directed toward the flexible material and, therefore, toward the surface being sprayed. Therefore, waste of marking fluid is reduced. Furthermore, the fins contribute to providing a continuous flow of marking fluid, so that the marking fluid does not dry out on the flexible portion. The continuous flow of fluid toward the surface being sprayed results in a more even application of the marking fluid and sharper edges for the lines drawn on the surface.

In certain embodiments, at least one fin has a triangular shape. In alternative embodiments, the fin has another shape, for example, a rectangular shape.

This has the advantage that the marking fluid can be precisely directed to a specific area, optimizing the flow of marking fluid toward the surface being sprayed.

In certain embodiments, at least one fin is located on the side of the masking plate facing the spray.

In certain embodiments, at least one masking plate has two fins. Advantageously, a masking plate with two fins helps direct the marking fluid to the correct area.

In certain embodiments, at least one fin extends vertically from the masking plate, with at least one fin extending vertically along the spray-facing side of the masking plate in the orientation of the masking plate in use. That is, in certain embodiments, at least one fin extending from the masking plate is substantially coaxial with the vertical or longitudinal axis. That is, at least one fin extends outward from the at least one masking plate.

In certain embodiments, at least one fin extends vertically at an angle from the horizontal.

This provides the advantage that a continuous or steady stream of marking fluid is applied to the flexible portion as the marking fluid is collected by the at least one fin and directed towards the flexible portion.

In certain embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal. That is, at least one fin extends substantially vertically and forms an angle between 60 and 70 degrees with respect to the horizontal, i.e., a vertical line or a transverse axis perpendicular to the longitudinal axis. The angle formed may include 60 degrees. The angle formed may exclude 60 degrees. The angle formed may include 70 degrees. The angle formed may exclude 70 degrees. In some embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal.

In one particular embodiment, at least one fin extends vertically at 68 degrees from the horizontal.

This provides the advantage that the marking fluid is directed toward the flexible portion in a continuous or steady manner at an improved flow rate.

In certain embodiments, the spray device includes two fins per masking plate, spaced apart above the flexible portion at an angle from the horizontal, with the distance between the two fins closer to the flexible portion being shorter than the distance between the two fins farther from the flexible portion.

In certain embodiments, the spray device includes at least two fins, the at least two fins configured such that the at least two fins and a portion of the masking plate partially form a funnel shape.

In some embodiments, the or each fin comprises a material having low surface energy and non-stick properties.

In certain embodiments, the or each fin comprises a silicone material.

In certain embodiments, the or each fin comprises an LDPE (low density polyethylene) material.

This allows a continuous flow of marking fluid to be provided to the flexible portion as the marking fluid does not wet the surface of a single fin or each fin, which has the advantage of providing a more uniform application of the marking fluid and sharper edges when drawing lines on the surface.

In addition, this provides the advantage that the marking fluid does not adhere strongly to the fin or fins even when dry, allowing the dried marking fluid to be easily removed from the fin or fins by mechanical means, such as scraping or bending the surface, thereby reducing the use of cleaning chemicals.

In some embodiments, the or each fin comprises a flexible material.

In certain embodiments, the or each fin comprises a silicone material having a Shore A hardness of 60.

This has the advantage that the fin or fins have good rigidity, allowing the silicone component to be better attached to the masking plate. Furthermore, the silicone fin or fin components are easier to clean as they can bend to remove dried marking fluid, thereby reducing the need for cleaning chemicals.

In some embodiments, the or each fin is separably attached to the masking plate or flexible portion. In some alternative embodiments, the fin and masking plate are integral.

In certain embodiments, at least one masking plate comprises a pointer. In certain embodiments, a masking plate comprises a pointer. In some embodiments, the pointer may include a visual indicia such as a marking, an arrow, or the like. In some embodiments, the pointer extends from a front end of the masking plate relative to the direction of travel during use.

This has the advantage that the user can visually identify the intended edge of the sprayed line.

According to another aspect of the present invention, a pointer is provided that includes an elongated flexible portion having a tapered end.

The pointer can be a detachable pointer. In some embodiments, the pointer comprises a detachable pointer. In some embodiments, the pointer is detachably attached to the masking plate. In some embodiments, the pointer is detachably attached to the device.

Alternatively, the pointer may be fixed to the masking plate or any part of the device itself.

In some embodiments, the device includes two masking plates, each equipped with a pointer. Advantageously, the two pointers indicate the side edges where the fluid spray is to be applied.

In certain embodiments, the pointer is releasably attached to at least one masking plate. In particular examples, the pointer can be releasably attached to the front end of at least one masking plate relative to the direction of travel in use.

In certain embodiments, the pointer is releasably attached to the device, e.g., the body of the device. In particular examples, the pointer can be releasably attached to the front end of the device, e.g., the body of the device, relative to the direction of travel during use.

This has the advantage that the pointer can be easily removed or replaced.

In certain embodiments, the pointer is configured to be able to engage the surface being sprayed during use. In some embodiments, for example, the pointer comprises a flexible material. In some embodiments, the pointer has a sled shape. In some embodiments, the pointer has a curved end. When the pointer has a curved or sled-shaped edge, it can overcome unevenness without getting caught.

The sled design, with the front of the pointer being curved and made of a flexible material or design, allows the pointer to be positioned as close as possible to the ground. The pointer can flex and overcome surface irregularities.

The pointer can be attached to a masking plate or flexible section on one side of the device to indicate, for example, one side of the marked line. The user's preference for which side to use can depend, for example, on whether the user has a preference for being right-handed or left-handed. For example, a right-handed user may prefer to place the pointer on the left side so that the edge of the line is in view along with the tip of the pointer.

The pointer features described herein advantageously help reduce parallax effects and provide a more accurate correlation between the edge of the marked line and the pointer position.

In certain embodiments, the pointer is releasably attached to at least one masking plate. In particular examples, the pointer can be releasably attached to the front end of at least one masking plate relative to the direction of travel in use.

In certain embodiments, the pointer is releasably attached to the device, e.g., the body of the device. In particular examples, the pointer can be releasably attached to the front end of the device, e.g., the body of the device, relative to the direction of travel during use.

This has the advantage that the pointer can be easily removed or replaced.

In certain embodiments, the pointer comprises a flexible strap extending from at least one masking plate toward the surface to be sprayed.

In certain embodiments, the pointer comprises a flexible strap that extends from the device, e.g., the body of the device, toward the surface to be sprayed.

In certain embodiments, the pointer comprises a wheel toward the distal end of the flexible strap, which wheel can contact the surface to be sprayed during use.

In certain embodiments, the spray device includes a gas flow system positioned to direct the sprayed marking fluid.

This has the advantage that the marking fluid that accumulates in the flexible section is blown towards the surface being sprayed, resulting in sharper edges of the line drawn on the surface.

In certain embodiments, the flexible portion is integrally formed within at least one masking plate.

In certain embodiments, the spray device further comprises a stabilizing arm. The stabilizing arm comprises a stabilizing wheel.

This provides the advantage that the spray device is stabilized against irregularities in or on the surface being sprayed during use.

In certain embodiments, the stabilizing arm is located at the rear of the spray device relative to the direction of travel of the spray device during use.

This provides the advantage of stabilizing the rear end of the spray device, which is typically lighter than the front end and therefore more prone to accidental movement during use. Advantageously, having the stabilizing arms at the rear of the device helps to ensure an unobstructed forward view.

In certain embodiments, the stabilizing wheel is located on the outward-facing side of the stabilizing arm.

This has the advantage that the stabilizing wheel is spaced away from the marking fluid being applied to the surface, preventing smearing of the marking fluid being applied to the surface.

In some embodiments, the width of the wheelbase between the front wheel pair or the rear wheel pair can be, for example, in the range of 5 centimeters to 100 centimeters. In some embodiments, the rear wheel or stabilizing wheel has a wheelbase between 7 centimeters and 50 centimeters. In some embodiments, the stabilizing wheel has a wheelbase that is 10 centimeters greater than the width of the line created by the marking fluid.

In some embodiments, the device has a width setting that corresponds to the desired width of the marking line to be created. A 5 centimeter line width setting can result in a 15 centimeter wheelbase. A 10 centimeter line width setting can result in a 25 centimeter wheelbase.

In certain embodiments, the stabilizing arm is pivotally mounted and positioned to swing in a horizontal plane.

This has the advantage that the spray device can be steered by pivoting the stabilizing arm.

In certain embodiments, the spray device further comprises a locking mechanism arranged to lock the stabilizing arm into a position in a horizontal plane.

This has the advantage that circular markings can be sprayed easily and accurately using a spraying device.

In certain embodiments, the stabilizing arm or stabilizing wheel includes a suspension mechanism. In some embodiments, the suspension mechanism of the stabilizing arm or stabilizing wheel includes a spring or elastic material. In some embodiments, the suspension mechanism of the stabilizing wheel includes curved flexible spokes. In some embodiments, the suspension mechanism of the stabilizing wheel includes curved spokes, and the curved spokes include elastic material.

In certain embodiments, the stabilizing wheel comprises curved, flexible spokes.

This provides the advantage that the stabilising wheels provide suspension and vibration isolation, thus improving the stability of the spray device in use, particularly on uneven surfaces, i.e. undulations within or on the surface.

In certain embodiments, the stabilizing arm is biased to extend directly opposite the direction of travel of the spray device.

This has the advantage that the stabilizing arm resists articulation, improving stability when spraying in a straight line.

In another aspect of the present invention, there is provided a spray device for defining the shape of a marking fluid when sprayed onto a surface, the spray device comprising a nozzle through which the marking fluid is sprayed and at least one masking plate for defining the edge of the sprayed marking fluid sprayed from the nozzle, the at least one masking plate comprising at least one fin.

In certain embodiments, at least one fin has a triangular shape.

In certain embodiments where the fins are triangular in shape, in some specific embodiments, one side of the triangular fin extends along the masking plate, one side of the fin extends perpendicularly from the masking plate at the top of the fin in use, and the third side tapers inwardly relative to the masking plate as this surface descends towards the bottom, with the surface facing farthest from the masking plate in use.

In certain embodiments, at least one fin is located on the side of the masking plate facing the spray.

In certain embodiments, at least one masking plate has two fins.

In certain embodiments, at least one fin extends vertically away from the flexible portion.

In certain embodiments, at least one fin extends vertically at an angle from the horizontal.

In certain embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal. That is, at least one fin extends substantially vertically and forms an angle between 60 and 70 degrees with respect to the horizontal, i.e., a vertical line or a transverse axis perpendicular to the longitudinal axis. The angle formed may include 60 degrees. The angle formed may exclude 60 degrees. The angle formed may include 70 degrees. The angle formed may exclude 70 degrees. In some embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal.

In certain embodiments, the spray device includes two fins per masking plate, spaced apart above the flexible portion at an angle from the horizontal, with the distance between the two fins closer to the flexible portion being shorter than the distance between the two fins farther from the flexible portion.

In certain embodiments, the spray device includes at least two fins, the at least two fins configured such that the at least two fins and a portion of the masking plate partially form a funnel shape.

In certain embodiments, the or each fin comprises a silicone material.

In certain embodiments, the spray device further comprises a stabilizing arm. The stabilizing arm comprises a stabilizing wheel.

In certain embodiments, the spray device includes a gas flow system positioned to direct the sprayed marking fluid.

In certain embodiments, at least one masking plate comprises a spray guide as described herein. For example, in some embodiments, at least one masking plate comprises a spray guide that comprises a flexible portion.

In certain embodiments, at least one masking plate comprises a flexible portion.

In certain embodiments, the flexible portion, when in operation, is positioned on the masking plate at the portion of the masking plate closest to the surface to be sprayed.

This advantageously allows the flexible portion, including the masking plate, to be used in close proximity to the surface being sprayed. Even if the flexible portion hits a bump or other object, it can deform and return to its original shape without damage, allowing the device, masking plate and flexible portion to be used much closer to the surface being sprayed than previously possible.

In certain embodiments, the flexible portion is at least part of a member that is releasably engaged with at least one masking plate.

In certain embodiments, the spray device includes two masking plates, each with a flexible portion.

In certain embodiments, the flexible portion slopes inward toward the surface being sprayed.

In certain embodiments, the flexible portion is inclined between 0 and 20 degrees from the vertical. That is, it forms an angle between 0 and 20 degrees with respect to the vertical axis. For example, the flexible portion can be inclined at 0, 5, 10, 15, or 20 degrees, or any integer or non-integer angle therebetween.

In certain embodiments, the flexible section is inclined at 5 degrees from the vertical.

In certain embodiments, the flexible portion comprises at least one tooth. That is, the flexible portion may comprise one or more teeth.

In certain embodiments, the flexible portion comprises multiple teeth. That is, the flexible portion may comprise more than one, i.e., two or more, teeth.

In certain embodiments, the teeth are of equal vertical length, i.e., each tooth or teeth may have an equal or identical vertical length relative to the other teeth.

In certain embodiments, the teeth have different vertical lengths, i.e., each tooth may have an unequal, non-identical, or different vertical length relative to the other teeth.

In certain embodiments, the or each tooth is angled inward relative to the surface being sprayed.

In certain embodiments, the flexible portion, the tooth or teeth, or both the flexible portion and the tooth or teeth are inclined between 0 and 20 degrees from the vertical. That is, they form an angle between 0 and 20 degrees with respect to the vertical axis. That is, they can form an angle, or inclination angle, between 0 and 20 degrees (excluding both 0 and 20 degrees).

In other examples, the flexible portion is inclined at an angle between 0 and 20 degrees (excluding 0 degrees, but including 20 degrees). For example, the flexible portion, the tooth or teeth, or both the flexible portion and the tooth or teeth can be inclined at an angle of 0, 5, 10, 15, or 20 degrees, or any integer or non-integer angle therebetween.

In certain embodiments, the flexible portion, the tooth or teeth, or both the flexible portion and the tooth or teeth are inclined at 5 degrees from the vertical.

In certain embodiments, the central tooth or teeth have a longer vertical length, relative to the direction of travel, than the tooth or teeth at the front or rear end of the flexible section.

In certain embodiments, the teeth comprise a silicone material.

In certain embodiments, the flexible portion comprises a silicone material.

In certain embodiments, the silicone material has a Shore A hardness of 60.

In another aspect of the present invention, there is provided a spray device for defining the shape of a marking fluid when sprayed onto a surface, the spray device comprising: a nozzle through which the marking fluid is sprayed; at least one masking plate that defines the edge of the sprayed marking fluid sprayed from the nozzle; and a stabilizing arm, the stabilizing arm comprising a stabilizing wheel.

In certain embodiments, the stabilizing arm is located at the rear of the spray device relative to the normal direction of travel of the spray device during operation.

In certain embodiments, the stabilizing wheel is located on the outward-facing side of the stabilizing arm.

In certain embodiments, the stabilizing arm is pivotally mounted so that it can swing in a horizontal plane.

In certain embodiments, the stabilizing wheel is pivotally mounted to the stabilizing arm, allowing the stabilizing wheel to oscillate in a horizontal plane.

In certain embodiments, the stabilizing wheel comprises curved, flexible spokes.

In certain embodiments, the stabilizing arms are biased to extend directly opposite the direction of travel.

In certain embodiments, the spray device further comprises a locking mechanism arranged to lock the stabilizing arm into a position in a horizontal plane.

In certain embodiments, the stabilizing wheels include tires.

In certain embodiments, the tire comprises rubber.

In certain embodiments, at least one masking plate comprises fins.

In certain embodiments, at least one masking plate comprises a flexible portion.

In accordance with another aspect of the present invention, there is provided a masking plate for use in a spray device that defines the shape of marking fluid when sprayed onto a surface, the masking plate including a flexible portion that, in operation, is located on the masking plate at a portion of the masking plate closest to the surface to be sprayed.

In certain embodiments, the flexible portion is at least part of a member that is releasably engaged with at least one masking plate.

In certain embodiments, the masking plate comprises at least one fin.

In certain embodiments, at least one fin has a triangular shape.

In certain embodiments, at least one fin is located on the side of the masking plate facing the spray.

In certain embodiments, the masking plate has two fins.

In certain embodiments, at least one fin extends vertically away from the flexible portion.

In certain embodiments, at least one fin extends vertically at an angle from the horizontal.

In certain embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal. That is, at least one fin extends substantially vertically and forms an angle between 60 and 70 degrees with respect to the horizontal, i.e., a vertical line or a transverse axis perpendicular to the longitudinal axis. The angle formed may include 60 degrees. The angle formed may exclude 60 degrees. The angle formed may include 70 degrees. The angle formed may exclude 70 degrees. In some embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal.

In one particular embodiment, the masking plate comprises two fins spaced apart above the flexible portion at an angle from the horizontal, with the distance between the two fins closer to the flexible portion being shorter than the distance between the two fins farther from the flexible portion.

In certain embodiments, the spray device includes at least two fins, the at least two fins configured such that the at least two fins and a portion of the masking plate partially form a funnel shape.

In certain embodiments, the fins comprise a silicone material.

In certain embodiments, the silicone material has a Shore A hardness of 60.

In certain embodiments, the masking plate includes a pointer. In some examples, the pointer may include a visual indicia, such as a marking, an arrow, or the like. In some examples, the pointer extends from the front end of the masking plate relative to the direction of travel during use.

In certain embodiments, the pointer is releasably attached to the masking plate. In certain embodiments, the pointer can be releasably attached to the front end of the masking plate relative to the direction of travel during use.

In certain embodiments, the masking plate comprises a flexible portion.

In another aspect of the present invention, there is provided a masking plate for use in a spray device that defines the shape of marking fluid when sprayed onto a surface, the masking plate including fins positioned on the side of the masking plate facing the intended spray, the fins extending vertically from a lower portion of the masking plate nearest the surface to be sprayed.

In certain embodiments, at least one fin has a triangular shape.

In certain embodiments, at least one fin is located on the side of the masking plate facing the spray.

In certain embodiments, the masking plate has two fins.

In certain embodiments, at least one fin extends vertically away from the flexible portion.

In certain embodiments, at least one fin extends vertically at an angle from the horizontal.

In certain embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal. That is, at least one fin extends substantially vertically and forms an angle between 60 and 70 degrees with respect to the horizontal, i.e., a vertical line or a transverse axis perpendicular to the longitudinal axis. The angle formed may include 60 degrees. The angle formed may exclude 60 degrees. The angle formed may include 70 degrees. The angle formed may exclude 70 degrees. In some embodiments, at least one fin extends vertically between 60 and 70 degrees from the horizontal.

In one particular embodiment, the masking plate comprises two fins spaced apart above the flexible portion at an angle from the horizontal, with the distance between the two fins closer to the flexible portion being shorter than the distance between the two fins farther from the flexible portion.

In certain embodiments, the masking plate includes at least two fins, the at least two fins being configured such that the at least two fins and a portion of the masking plate form a partial funnel shape.

In certain embodiments, the fins comprise a silicone material.

In certain embodiments, the silicone material has a Shore A hardness of 60.

In certain embodiments, the masking plate includes a pointer. In some examples, the pointer may include a visual indicia, such as a marking, an arrow, or the like. In some examples, the pointer extends from the front end of the masking plate relative to the direction of travel during use.

In certain embodiments, the spray device further comprises a stabilizing arm. The stabilizing arm comprises a wheel.

In certain embodiments, the spray device includes a gas flow system positioned to direct the sprayed marking fluid.

In certain embodiments, the masking plate comprises a flexible portion.

In another aspect of the present invention, a kit of parts is provided that includes the spray device and masking plate described herein.

In another aspect of the invention, there is provided a method of using a spray device, comprising the steps of:
providing a spray device comprising a nozzle through which marking fluid is sprayed and at least one masking plate as described herein that defines an edge of the sprayed marking fluid sprayed from the nozzle;
activating the nozzle to spray marking fluid toward the surface to be sprayed;
providing a sprayed marking on the surface by moving the spray device in a forward direction;
A method is provided, comprising:

In another aspect of the present invention, there is provided a method for manufacturing a spray device having a masking plate as described herein.

In another aspect of the present invention, there is provided a method for producing a masking plate as described herein, optionally for use in a spray device as described herein.

As used herein, the term "fin" is used to describe a generally flat protrusion.

As used herein, the term "marking fluid" is used to describe a fluid containing a particulate solid that can be sprayed to leave a mark.

Any feature or step described herein with respect to one embodiment, aspect, or example of a spray device, a masking plate, a flexible section, a method of making or using a spray device or a masking plate or a flexible section, or a kit of parts including a spray device or a masking plate or a flexible section, may be equally applicable to any other embodiment, aspect, or example of a spray device, a masking plate, or a flexible section, a method of making or using a spray device or a masking plate, or a kit of parts including a spray device or a masking plate or a flexible section.

The following provides a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein, above or below in the detailed description.

1. An atomizing device that defines the shape of a marking fluid when sprayed onto a surface, comprising:
a stabilizing arm with a stabilizing wheel;
A spray device comprising:
2. The spray device of Example 1, wherein the stabilizing arm is, in use, located at the rear of the spray device relative to the direction of travel of the spray device.
3. The spray device according to example 1 or 2, wherein the stabilizing wheel is located on the outward-facing side of the stabilizing arm.
4. The spray device of any one of Examples 1 to 3, wherein the stabilizing arm is pivotally mounted and arranged to oscillate in a horizontal plane.
5. The spray device of example 4, further comprising a locking mechanism positioned to lock the stabilizing arm into a position in a horizontal plane.
6. The spray device according to any one of Examples 1 to 5, wherein the stabilizing wheel comprises curved flexible spokes.
7. The spray device of any one of Examples 1-6, wherein the stabilizing arm is biased to extend diametrically opposite the direction of travel of the spray device.
8. The spray device of any preceding example, wherein the spray device comprises a spray guide, the spray guide comprising a flexible portion.
9. The spray device of example 8, wherein the flexible portion of the spray guide is, in use, disposed on the spray guide at a portion of the spray guide closest to the surface to be sprayed.
10. The spray device of any one of Examples 8 and 9, wherein the spray device comprises an engagement mechanism that releasably engages with the spray guide.
11. The spraying device of example 8, 9 or 10, wherein the spraying mechanism comprises a masking plate.
12. The spray mechanism of example 11, wherein the masking plate comprises an engagement mechanism that releasably engages with the spray guide.
13. The spraying device according to example 11 or 12, wherein the spraying device comprises two masking plates, each masking plate comprising a spray guide.
14. The spray device of any of Examples 8 to 13, wherein the spray guide or the flexible portion of the spray guide is angled inward toward the surface to be sprayed.
15. The spray device of example 14, wherein the spray guide or the flexible portion of the spray guide is inclined from the vertical by 0 to 20 degrees.
16. The spray device of any one of Examples 8-15, wherein the spray guide comprises at least one tooth.
17. The spray device of example 16, wherein the spray guide comprises a plurality of teeth.
18. The spray device of example 17, wherein one or more central teeth are provided, the central tooth or teeth being longer in a direction perpendicular to the direction of travel in use than the tooth or teeth at the front or rear end of the flexible portion.
19. The spray device of any one of examples 16-18, wherein the or each tine slopes inwardly toward the surface to be sprayed.
20. The spray device of example 19, wherein the or each tine is inclined at 5 degrees from vertical.
21. The spray device of any one of examples 8 to 20, wherein the spray guide comprises a silicone material.
22. The spray device of any one of examples 8 to 21, wherein the flexible portion of the spray guide comprises a silicone material.
23. The spray device of example 21 or 22, wherein the silicone material has a Shore A hardness of 60.
24. The spray device of any one of examples 11, 12 or 13, wherein at least one masking plate comprises at least one fin.
25. The spray device of example 24, wherein at least one fin has a triangular shape.
26. The atomizing device of example 25, wherein at least one fin extends vertically at an angle from the horizontal.
27. The atomizing device of example 26, wherein the at least one fin extends vertically between 60 and 70 degrees from the horizontal.

Reference will now be made to the drawings, which illustrate one or more embodiments of the present disclosure. However, it will be understood that other embodiments not shown in the drawings are within the scope of the present disclosure. Like reference numbers used in the drawings refer to like components, steps, etc. However, it will be understood that the use of a number to refer to a component in a given drawing is not intended to limit the component with the same reference number in another drawing. Additionally, the use of different numbers to refer to components in different drawings is not intended to indicate that the components having different reference numbers may not be the same or similar to other components. The drawings are for illustrative purposes only and not for limiting purposes. Schematic diagrams presented in the drawings are not necessarily to scale.

Illustrative embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

1 is a perspective view of a spray device according to an embodiment of the present invention; 2 is another perspective view of the spray device of FIG. 1. 2 is a top view of the spray device of FIG. 1 in a first configuration. 2 is a top view of the spray device of FIG. 1 in a second configuration. 1 in a third configuration and marking fluid being sprayed from the spray device onto a surface. FIG. FIG. 2 is an enlarged top view of the stabilizing arm and stabilizing wheel of the spray device of FIG. 1. FIG. 2 is an enlarged side view of the stabilizing wheel of the atomizing device of FIG. 1; FIG. 2 is a cross-sectional view of the spray device of FIG. 1; FIG. 2 shows a portion of the air flow system of the atomizing device of FIG. 1. FIG. 2 is a perspective view of a pointer of the spray device of FIG. 1; 2 is an enlarged view of the spray device of FIG. 1 with a protective plate. 12 shows the central guard plate of FIG. 11. FIG. 2 is another enlarged view of the spray device of FIG. 1 with a protective plate. FIG. 1 is a perspective view of an embodiment of a masking plate. FIG. 15 is a side view of the masking plate of FIG. 14 . FIG. 15 is another perspective view of the masking plate of FIG. 14 . FIG. 15 is a perspective view of the masking plate of FIG. 14 with the pointer and flexible portion removed. FIG. 15 is a perspective view of a flexible portion of the masking plate of FIG. 14 . FIG. 2 is a perspective view of a masking plate, a nozzle, and an area where marking fluid is sprayed from the nozzle. FIG. 10 is an enlarged view of a spray device having another embodiment of a masking plate. FIG. 21 is an enlarged cross-sectional view of the spray device of FIG. 20. FIG. 21 is another enlarged cross-sectional view of the spray device of FIG. 20. FIG. 21 is a perspective view of the masking plate and flexible portion of FIG. 20; FIG. 21 is a perspective view of the flexible portion of FIG. 20;

The exemplary embodiment described relates to an apparatus for spraying a line onto a surface, which in an exemplary embodiment may be a wheeled line drawing apparatus.

The use of certain terminology in the following description is for convenience only and is not limiting. The words "upper," "lower," "upward," and "downward" designate directions in the drawings to which they refer and are relative to the described components when assembled and attached. The words "inner," "inwardly," and "outwardly," "outwardly" refer to directions toward and away from, respectively, the centerline or geometric center (e.g., central axis) of the described component, with the specific meaning being readily apparent from the context of the description. Additionally, the terms "proximal" (i.e., closer) and "distal" (i.e., away) designate positions relative to the body or attachment point.

Furthermore, as used herein, the terms "connected," "fixed," and the like are intended to include a direct connection between two members, where no other members are present between them, and an indirect connection between the members, where one or more other members are present between them. This term includes the words specifically listed above, derivatives thereof, and words of similar import.

Furthermore, unless otherwise specified, the use of ordinal adjectives such as "first," "second," "third," etc. is intended merely to indicate that reference is being made to different instances of similar objects, and is not intended to imply any obligation for the objects so described to be in a given order, ranking, or any other manner in time or space. Like reference numerals are used throughout to denote like features.

1-7, in accordance with an embodiment of the present invention, there is provided a spray device, e.g., a wheeled line drawing device 100, that defines the shape of a marking fluid as it is sprayed onto a surface. The device 100 generally has a first end, i.e., a front end relative to a normal direction of travel, and a second end, i.e., a rear end relative to a normal direction of travel. Such direction of travel is generally indicated by arrow D.

The device 100 includes a main body 102 on which a holder 104 for an aerosol canister 106 is held. With further reference to FIG. 19 , the aerosol canister 106 includes a nozzle 107 through which a spray of marking fluid F is sprayed onto a surface, such as the ground. The aerosol canister 106 is held in the holder 104 by a locking mechanism 114. Pivotally connected to the holder 104 is an operating arm 108 that terminates in a handle 110 having an operating trigger (not shown). The operating arm 108 extends upwardly from the main body 102 toward a second end of the device 100. A push button 112 is provided as part of the operating arm 108 and can be depressed to freely pivot the operating arm 108 to a desired position and released to lock the operating arm 108 substantially in the desired position. The body 102 includes a marking fluid spraying portion including a masking plate 200 and, optionally, an air flow system, as described in more detail below in FIG. 8.

1-7, a pair of wheels 116a, 116b are provided at a first end of the device 100 vertically below the aerosol canister 106. The wheels 116a, 116b are rotatably mounted on the outer lateral sides of a pair of sidewall members 118a, 118b, which are located on the outer lateral sides of the body 102. Each sidewall member 118a, 118b includes an inner wheel blanking plate 120 along with a laterally extending axle 122 to which each wheel 116a, 116b is rotatably mounted. Each wheel is provided with a series of linear spokes 124 extending linearly or substantially linearly from a central hub 125 to a peripheral wheel rim 128. A tire 129 is mounted on the peripheral wheel rim 128 and is positioned to contact a surface, such as the ground, during use. The distance between wheels 116a, 116b is considered the front wheelbase, which in this embodiment may be approximately 10 centimeters.

The device 100 further includes a pair of stabilizing wheels 130a, 130b disposed at a second end of the device. Each stabilizing wheel 130a, 130b is mounted on one of a pair of stabilizing arms 132a, 132b that extend longitudinally from the body 102 toward the distal end. Each stabilizing arm 132a, 132b includes a laterally extending axle 134 to which each stabilizing wheel 130a, 130b is rotatably mounted. The stabilizing wheels 130a, 130b are mounted externally of the stabilizing arms 132a, 132b such that the stabilizing wheels 130a, 130b are positioned distal to the area of the surface to which the marking fluid is applied.

The stabilizing arms 132a, 132b are pivotally connected to the main body 102. Each pivotable connection is operable by a locking mechanism. The locking mechanism can be used to selectively lock each stabilizing arm 132a, 132b into a desired position, thereby allowing a user to create circular patterns, etc., during use. Additionally, in some examples, the stabilizing arms 132a, 132b can be spring-loaded to bias the device 100 toward a first configuration in which it is driven linearly. In some examples, the stabilizing arms 132a, 132b can operate singly, i.e., independently of one another, while in other examples, the stabilizing arms 132a, 132b can be operably coupled to move in unison, i.e., one movement is subordinate to or causes the other to move.

The stabilizing wheels 130a, 130b are provided with a plurality of curved, flexible spokes 136 extending from a central hub 138 toward a peripheral wheel rim 140. The curved, flexible spokes 136 are arranged to act as shock absorbers, allowing the spokes to flex when the device contacts an uneven surface. As best shown in FIG. 1, a tire 142 is mounted on the peripheral wheel rim 138 and is arranged to contact a surface, e.g., the ground, during use. The distance between the stabilizing wheels 130a, 130b is considered the rear wheel base, which may be shorter than the front wheel base. In some examples, the rear wheel base may be approximately 10 centimeters.

8 and 9, an optional airflow system 300 may be provided and may include each wheel inboard blanking plate 120, each blanking plate 120 defining a housing for an impeller or fan 126 powered by an electric motor (not shown). The blanking plate 120 may include a fixed plate 127 having openings 129 to direct air toward the impeller or fan 126. In instances where an impeller or fan 126 and an electric motor (not shown) are present, air is drawn through the openings 129 and expelled radially downward through ducts 131 toward the spray area. The spray area may generally be enclosed between the masking plate 200 and vertically below the nozzle 107 of the aerosol canister 106. The expelled air directs the sprayed liquid in the spray area toward a defined area of the surface, or toward the masking plate 200. The electric motor (not shown) may be powered by any suitable power source, such as a type AA 1.2v rechargeable battery. A switch (not shown) formed as part of the body 102 may be used to operate the electric motor (not shown).

In addition, FIG. 8 shows a spray area having a width W defined as the distance between opposing masking plates 200. The width W may range, for example, from 5 mm to 200 mm, depending on the desired spray line. It may be preferable that the width W be adjustable between several configurations during use. For example, the width W may be adjustable between a first configuration, in this embodiment where W equals 50 mm, and a second configuration, in this embodiment where W equals 100 mm.

In addition, as best shown in FIG. 1, the device 100 may include a pointer 350. The pointer 350 may be formed as part of the masking plate 200, as shown in FIG. 14, or may be formed as part of the device body 102. The pointer 350 provides a visual indication of the protruding edge of the sprayed line. Thus, in use, a user can easily recognize where the edge of the sprayed line will be formed.

Additionally or alternatively, the device 100 may include a detachable pointer 400, as best shown in FIGS. 2-5 and 10. The detachable pointer 400 includes a first end 402 that constitutes a mounting end and a second end 404 that constitutes a pointed end. The first end 402 has a slot 406 for detachably attaching the first end 402 to the device 100. The second end 404 has a curved profile 408 that terminates in a protrusion 410. A flexible section 412, such as a flexible strap 412, is formed between the first end 402 and the second end 404. In another example, the detachable pointer 400 may include a wheel (not shown) that contacts the ground during use. In some embodiments, the detachable pointer 400 may be used as a scraping tool to clean the device, for example, to scrape off marking fluid, if necessary. In some embodiments, the detachable pointer can have a sharp edge, for example, at the rear end of the flexible section 412. The sharp edge can, in some embodiments, be configured to fit between the fins, for example, on a masking plate. In embodiments in which the sharp edge is configured to fit between the fins, the sharp edge can be used to clean, for example, remove, marking fluid between the fins. The detachable pointer can also be used to clean other areas of the device. The sharp edge of the detachable pointer can also be used to clean other areas of the device.

In an alternative embodiment, the pointer 400 may be an integral part of, for example, a masking plate or device.

11 to 13, the device 100 may further include a protective plate 500. The protective plate 500 includes a first end 502 having a pair of arms 504 and a second end 505 having a substantially flat protective portion 506. The flat protective portion extends perpendicular to a wall 508. The wall 508 and the pair of arms 504 at the first end 502 are generally flush with each other. The pair of arms 504 are arranged to be stored within a storage portion 510 of the device 100. Thus, the protective plate 500 may be detachably coupled to the device 100. In particular, the storage portion 510 may be adjacent to the main body 102, the holder 104, or both the main body 102 and the holder 104. Thus, the protective plate 500 may serve to protect a portion of the device 100, such as the main body 102, the holder 104, or both the main body 102 and the holder 104, from overspray during use. That is, the protective plate 500 protects the device 100 from the sprayed fluid.

1-5, 8, and 9, in use, if the airflow system 300 is present, the fan 126 can be started by operating a switch, and the trigger on the operating arm 108 is pulled to activate the aerosol canister 106, causing the device 100 to spray a line L as it travels along a surface, as shown in FIG. 5. The airflow emerges from the duct 131 longitudinally and transversely downward along the edge of the masking plate 200, suppressing side overspray and blowing droplets of marking fluid that accumulate along the lower edge of the masking plate 200 back into the sprayed line, thereby creating a distinct spray line. Additionally, the masking plate 200 also serves to direct the marking fluid toward the surface, allowing the droplets of marking fluid to fall onto the surface onto which the marking fluid is sprayed. Thus, the masking plate 200, or the combination of the masking plate 200 and the airflow system 300, serves to create a spray line with a distinct outer edge. The masking plate 200 will be described in more detail below.

In use, the stabilizing arms 132a, 132b carrying the stabilizing wheels 130a, 130b can be adjusted to a desired configuration. As shown in FIG. 3, in a first configuration, the stabilizing arms 132a, 132b are substantially parallel. Furthermore, the stabilizing arms 132a, 132b form no angle with respect to their respective transverse axes, indicated by T in FIG. 3. The transverse axes extend from the attachment points of the stabilizing arms 132a, 132b in a direction directly opposite the direction of travel. In this first configuration, a straight line is sprayed. This first configuration may be useful when a small rear wheelbase is desired, for example, when space is limited, such as adjacent to a wall or other structure.

As shown in FIG. 4, in the second configuration, the stabilizing arms 132a, 132b are not parallel, but each stabilizing arm 132a, 132b forms an equal diagonal with respect to its respective transverse axis, indicated by T in FIG. 4. In this second configuration, straight lines are also sprayed. On the other hand, this second configuration may be useful, for example, when a large rear wheelbase is desired to ensure additional stability.

As shown in FIG. 5, in a third configuration, stabilizing arms 132a, 132b are substantially parallel and each form an angle with respect to their respective transverse axis T. In this third configuration, a curved line is sprayed. The curvature of the sprayed line can be changed by varying the angle of each of stabilizing arms 132a, 132b with respect to the transverse axis T.

Masking Plates As shown in FIGS. 14-24 , the device 100 includes a pair of opposing masking plates 200. The masking plates 200 can be used in conjunction with the device 100 described herein, as shown in FIGS. 1 and 20-22 . In particular, in use, a masking plate 200 is disposed on the inner surface of the body 102 on each lateral side of the spray of marking fluid F sprayed from the nozzle 107 of the aerosol canister 106. The masking plates 200 thus define the area over which the fluid is sprayed, and therefore the width and geometry of the spray pattern. In some examples, the masking plates 200 can be positioned such that the spray area has a width of 50 mm. The spray area, and therefore the width of the sprayed pattern, is generally defined by the distance between the two masking plates. The masking plate 200 may be adjustable between various settings, for example, the masking plate 200 may be adjustable between a first setting comprising a distance of, for example, 50 mm, and a second setting comprising a distance of, for example, 100 mm. The masking plate 200 may be adjusted to any suitable setting in any suitable manner. In some examples, the masking plate 200 includes a spray guide having a flexible portion 218, as described below. The spray guide may be integral with the masking plate 200, as described in this example, or may be formed as a separate component that can be attached to the masking plate 200.

14-19, one embodiment of the masking plate 200 comprises a lower edge 202, an upper edge 204, and first and second side edges 206, 208 connecting the lower and upper edges 202, 204. The first side edge 206 is formed at the front end of the masking plate 200 relative to the direction of travel D, and the second side edge 208 is formed at the rear end of the masking plate relative to the direction of travel D. The masking plate 200 comprises a first surface 210 and a second surface 212, each surface 210, 212 being bounded and defined by the lower edge 202, the upper edge 204, and the two side edges 206, 208, with each surface 210, 212 facing outward. The first surface 210 faces the interior surface of the body 102, and the second surface 212 is positioned to receive and direct marking fluid.

The first side edge 206 is provided with a front wall 214 extending inward from the second surface 212 toward the spray area. The front wall 214 may be a curved front wall. The curved front wall 214 curves from the upper edge 204 of the masking plate 200 to the lower edge 202 of the masking plate 200. As such, the front wall 214 is positioned to direct the marking fluid toward the lower edge 202 of the masking plate 200. The second side edge 208 is provided with a rear wall 216 extending inward from the second surface 212 toward the spray area. The rear wall 216 may be substantially vertical. The rear wall 216 may be provided as a curved rear profile of the masking plate 200 that curves inward and rearward to form the rear wall 216. As such, the rear wall 216 is positioned to prevent the marking fluid from leaking outside the spray area. In other examples, the masking plate 200 may not include the front wall 214 and the rear wall 216, and may instead be defined as a generally rectangular block.

The lower edge 202, or a portion of the lower edge 202, is generally disposed proximate to or positioned to engage the surface being sprayed. The lower edge 202 generally serves to allow marking fluid to drip from the lower edge 202 onto the surface being sprayed. Thus, the clearance between the lower edge 202 of the masking plate 200 and the surface can be important to line sharpness. For example, if the masking plate 200 is close or very close to the surface, the edges of the sprayed line tend to be sharper with a smaller clearance than with a larger clearance, as the droplets terminate on the surface more quickly. Thus, while it may be desirable for the device 100 to have a larger clearance from the ground so that the device 100 can be operated accurately and easily, it may also be desirable for the masking plate 200 to have a smaller clearance from the ground.

The masking plate 200 includes a flexible portion 218 extending from the lower edge 202 toward the surface to be sprayed. The flexible portion 218 is positioned proximate to or in engagement with the surface to be sprayed. The flexible portion 218 is attachable to the masking plate 200 by openings 220 extending through the flexible portion 218. The openings 220 provide a friction fit, push fit, or snap fit with a plurality of corresponding mounting pegs 222 formed as part of the first surface 210 of the masking plate 200. Thus, the flexible portion 218 can be easily attached to or detached from the masking plate 200. Furthermore, the flexible portion 218 can be retrofitted to an existing masking plate or spray guide.

The flexible portion 218 further includes a plurality of teeth 224 extending from a lower edge of the flexible portion 218 toward the surface to be sprayed. In the illustrated example, three teeth are shown. The teeth 224, or portions of the teeth 224, are positioned proximate to or to engage the surface to be sprayed. The teeth 224 of the masking plates 200 generally angle inward relative to the vertical or longitudinal axis toward the spray area. That is, the teeth 224 of one masking plate 200 extend inward toward the opposing masking plate 200, as shown in FIG. 1. In some embodiments, this angle is 5 degrees relative to the vertical. In other examples, the flexible portion 218 may generally angle inward relative to the vertical or longitudinal axis toward the spray area. In such examples, the teeth 224 may be coplanar and therefore have the same angle of inclination, or they may be angled relative to the flexible portion 218.

In the illustrated embodiment, the teeth 224 are arranged in a regular configuration, i.e., each single tooth of the teeth 224 is substantially identical in size, placement, etc. In this embodiment, the teeth 224 are arranged with a distance of 7 mm between each tooth. In use, in this embodiment, the teeth 224 can be arranged so that they are positioned approximately 0.5 mm from a flat surface.

In other examples, the teeth 224 may be irregular, with each tooth or portion of the teeth varying in size, placement, etc. In some examples, three teeth 224 may be provided centrally disposed along the lower edge of the flexible portion 218, with the central tooth being longer than the teeth located to either side of the central tooth.

The flexible portion 218 generally comprises a flexible material, such as silicone, that allows the flexible portion 218 to contact the surface being sprayed (i.e., the ground) without being damaged. Furthermore, the flexible portion 218 may be elastically deformable, allowing the flexible portion 218 to contact the surface being sprayed during use and then return to its original shape. Furthermore, the flexible material allows the marking fluid to continuously drip from the lower edge of the flexible portion; i.e., the flexible portion prevents the marking fluid from drying on the lower edge. Therefore, the edge definition of the sprayed line may be improved.

Furthermore, the teeth 224 may generally comprise a flexible material, such as silicone, such that the teeth 224 can contact the surface being sprayed (i.e., the ground) in the same manner as the flexible portion 218. In this manner, the gap between the flexible portion 218 of the masking plate 200 and the surface can be minimized, resulting in clearer edges for the sprayed line. Furthermore, the teeth 224 may be positioned to contact the surface being sprayed in use, thereby defining an outer edge or boundary where the marking fluid will not intersect. The flexible portion 218 and the teeth 224 may comprise the same or different materials, and may be an integral or separate part.

Each masking plate 200 also includes one or more fins 226 arranged to guide the marking fluid sprayed from the nozzles 107 toward the lower edge 202 of the masking plate 200, and in particular toward the flexible portions 218, i.e., the teeth 224. The fins 226 serve to provide a continuous flow of marking fluid toward the flexible portions 218, i.e., the teeth 224, thereby substantially reducing or even eliminating the risk of the marking fluid drying on the flexible portions 218. In this way, the fins 226 cooperate with the flexible portions 218 and the teeth 224 to provide a clear spray line.

Each fin 226 generally extends upward from a vertex of or proximal to the lower edge 202 of the masking plate 200 adjacent the flexible portion 218 toward a base of or proximal to the upper edge 204 of the masking plate. Therefore, each of the fins 226 may be generally defined as a triangular structure. The fins 226 may be formed as right-angled triangles.

In the illustrated example, a pair of fins 226 are provided. The pair of fins 206 can be oriented off-axis relative to the vertical line, i.e., the vertical or longitudinal axis, thereby forming an inclined angle. In some embodiments, the inclination angle of the fins can be between 10 degrees and 30 degrees. In some specific embodiments, the inclination angle of the fins is 20 degrees. In other words, each fin can form an angle between 0 degrees and 90 degrees (excluding 0 degrees and 90 degrees) with respect to the lower edge of the masking plate 200.

Each fin 226 may be inclined in an opposing manner. The first fin and second fin may be inclined to substantially form a partial funnel shape, e.g., an isosceles trapezoid having a shorter edge defined by an imaginary line between the apexes of each fin 226 proximate or at the lower edge 202 of the masking plate 200, and a longer edge defined by an imaginary line between the bases of each fin proximate or at the upper edge 204 of the masking plate 200.

In addition, the masking plate 200 includes a pointer 400 that includes a point 350. In some examples, the pointer 400 can be attached to the masking plate 200 as described above. In the illustrated example, the pointer 400 can be detachably attached to the masking plate 200.

Figures 20-24 show another example of a masking plate 200. The masking plate 200 of Figures 20-24 is substantially similar to that described with reference to Figures 14-19, and therefore like components are designated with like reference numerals. Differences between the masking plate 200 of Figures 14-19 and the masking plate 200 of Figures 20-24 are discussed below.

The masking plate 200 in this example does not have fins. Additionally, the masking plate has seven teeth 224 instead of three. The remaining features of the masking plate 200 in Figures 20-24 are the same as those described for the masking plate 200 in Figures 14-19.

Furthermore, in some examples, as shown in FIG. 24, seven teeth 224 may be provided centrally disposed along the lower edge of the flexible portion 218. The teeth 224 may include a central tooth 224a having a first length, two primary teeth 224b located on either side of the central tooth 224a and each having a second length, two secondary teeth 224c located on either side of the primary tooth 224b and each having a third length, and two tertiary teeth 224d located on either side of the secondary tooth 224c and each having a fourth length. The first length may be longer than the second length, the third length, and the fourth length. Furthermore, the first length may be longer than the second length, the second length may be longer than the third length, and the third length may be longer than the fourth length. In other examples, as shown in FIG. 24, the first length, second length, third length, and fourth length are substantially or exactly equal.

Referring to Figures 14-24, in use, marking fluid is introduced proximate the upper edge 204 of the masking plate 200. The marking fluid is continuously directed by the fins 206, curved front wall 214, and rear wall 216, if present, toward the lower edge 202 of the masking plate 200, and particularly toward the flexible portion 218 and teeth 224 located in the center of the lower end of the masking plate 200. The marking fluid continuously flows from the upper end of each tooth 224 toward the lower end of each tooth 224, dripping from the lower end of each tooth 224 onto the surface to be sprayed, or scraping off onto the surface to be sprayed as each tooth 224 contacts the ground.

Those skilled in the art will appreciate that the above-described embodiment(s) are presented by way of example only and not of limitation, and that various changes and modifications may be made without departing from the scope of the present invention as defined by the appended claims. Various modifications may be made to the detailed designs described above, such as variations in shape, size, arrangement, assembly, etc. In certain instances, as will be appreciated by those skilled in the art, the masking plate may or may not include one or more fins, one or more teeth, etc. In some instances, the masking plate includes one fin, two fins, three fins, four fins, or five fins. In other instances, the masking plate includes six or more fins. In some instances, the flexible portion includes one tooth, two teeth, three teeth, four teeth, five teeth, six teeth, seven teeth, eight teeth, nine teeth, or ten teeth. In other instances, the flexible portion includes eleven or more teeth. In other instances, the flexible portion does not include teeth. The teeth may be substantially or closely equal in size, dimension, geometry, shape, etc. Alternatively, the teeth may differ in size, dimension, geometry, shape, etc.
The present disclosure also includes the following inventions.
The first aspect is
A masking plate for use in a spray device and including a spray guide that defines the shape of marking fluid as it is sprayed onto a surface, the spray guide including a flexible portion.
The second aspect is
The flexible portion of the spray guide is a masking plate in a first aspect, which is disposed at least in a portion of the spray guide that is closest to the surface to be sprayed in operation.
The third aspect is
The masking plate according to the first aspect, wherein the spray guide comprises an engagement mechanism that allows for releasable engagement with a spraying device.
The fourth aspect is
The masking plate of the first aspect, wherein the spray guide comprises an engagement mechanism that allows for releasable engagement of a spraying device with the masking plate.
The fifth aspect is
The flexible portion is a masking plate in a first aspect that slopes inward toward the surface to be sprayed.
The sixth aspect is
The masking plate according to the fifth aspect, wherein the flexible portion is inclined at an angle between 0 and 20 degrees from the vertical line.
The seventh aspect is
The flexible portion is a masking plate in a first aspect, comprising at least one tooth.
The eighth aspect is
The masking plate according to a seventh aspect, wherein the flexible portion comprises a plurality of teeth.
A ninth aspect is
A masking plate according to an eighth aspect, wherein one or more central teeth are provided, and the one or more central teeth are longer in a direction perpendicular to the direction of travel during use than the one or more teeth at the front end or rear end of the flexible portion.
A tenth aspect is
A seventh aspect of the masking plate, wherein the, some or each tooth slopes inwardly towards the surface to be sprayed.
An eleventh aspect is
A masking plate according to a tenth aspect, wherein the or each tooth is inclined from the vertical by between 0 and 20 degrees.
A twelfth aspect is
11. A masking plate according to claim 11, wherein the or each tooth is inclined at 5 degrees from the vertical.
A thirteenth aspect is
Aspect 7. The masking plate of any one of Aspects 12 to 14, wherein the tooth, some of the teeth, or each tooth comprises a silicone material.
A fourteenth aspect is
The masking plate according to any one of the first to twelfth aspects, wherein the flexible portion includes a silicone material.
A fifteenth aspect is
The masking plate according to a thirteenth aspect, wherein the silicone material has a Shore A hardness of 60.
A sixteenth aspect is
The spray guide is the masking plate of the first aspect, further comprising at least one fin.
A seventeenth aspect is
16. The masking plate of claim 15, wherein the at least one fin has a triangular shape.
An eighteenth aspect is
16. The masking plate of claim 15, wherein the at least one fin extends vertically at an angle from the horizontal.
A nineteenth aspect is
In the masking plate of the eighteenth aspect, the at least one fin extends vertically at an angle of 60 to 70 degrees from the horizontal line.
A twentieth aspect is
A spray device comprising the masking plate according to any one of the first to twelfth aspects.

Claims (17)

1. A masking plate for use in a spray device, the masking plate comprising a spray guide that defines a shape of marking fluid when sprayed onto a surface, the spray guide comprising a flexible portion;
the flexible portion comprises a plurality of central teeth ;
A masking plate wherein the plurality of central teeth are longer in a direction perpendicular to the direction of travel during use than the teeth at the front or rear end of the flexible portion. 2. The masking plate of claim 1, wherein the flexible portion of the spray guide is disposed at least in a portion of the spray guide that is closest to the surface to be sprayed in operation. The masking plate of claim 1, wherein the spray guide includes an engagement mechanism that allows for releasable engagement with a spraying device. The masking plate of claim 1, wherein the spray guide includes an engagement mechanism that allows a spray device to releasably engage with the masking plate. The masking plate of claim 1 , wherein the flexible portion slopes inward toward the surface to be sprayed . The masking plate of claim 5, wherein the flexible portion is inclined between 0 and 20 degrees from the vertical. 2. The masking plate of claim 1, wherein the , or some of the, central teeth are angled inwardly toward the surface to be sprayed . 8. A masking plate according to claim 7, wherein the or each central tooth is inclined from vertical at between 0 and 20 degrees. 9. A masking plate according to claim 8, wherein the or each central tooth is inclined at 5 degrees from vertical. A masking plate according to any one of the preceding claims, wherein the , or some of the, central teeth comprise a silicone material. A masking plate according to any one of claims 1 to 9, wherein the flexible portion comprises a silicone material. The masking plate of claim 10, wherein the silicone material has a Shore A hardness of 60. The masking plate of claim 1, wherein the spray guide further comprises at least one fin. The masking plate of claim 13, wherein the at least one fin has a triangular shape. The masking plate of claim 13, wherein the at least one fin extends vertically at an angle from the horizontal. The masking plate of claim 15, wherein the at least one fin extends vertically at an angle of 60 to 70 degrees from the horizontal. A spray device equipped with the masking plate described in any one of claims 1 to 9.