NZ731449B2 - Lockable bolt assembly - Google Patents

Abstract

Commercial buildings are often rented and the tenancy can regularly change. It is common that the incoming tenant change the coding on the cylinder locks so as to inhibit the outgoing tenant from gaining access. For a lockable bolt assembly it is generally required that the housing be detached from the door, and disassembled in order to gain access to the cylinder lock within the housing. Whilst this is time consuming it is also generally undesirable to detach and reattach the housing to the door, particularly if it involves fixing screws to a timber door, as this can compromise the attachment of the housing to the door. The claimed invention allows a user to remove the lock cylinder without having to detach the entire assembly from the door. In particular, a lockable bolt assembly (1) is disclosed which includes a housing (2), a bolt (4), a base (15) which mounts to a door, a cover (17) which is detachable from the base (15), and a lock mechanism having a lock cylinder (12) which is accessible through an aperture (21) in the cover (17). The lock mechanism is adjustable between an unlocked condition, in which the bolt (4) can be moved, and a locked condition in which the bolt (4) is inhibited from moving. The cover (17) is only detachable from the base (15) when the bolt (4) is removed from the housing (2). The lock cylinder is subsequently only removable from the housing (2) after the cover (17) has been detached from the base (15). the door, and disassembled in order to gain access to the cylinder lock within the housing. Whilst this is time consuming it is also generally undesirable to detach and reattach the housing to the door, particularly if it involves fixing screws to a timber door, as this can compromise the attachment of the housing to the door. The claimed invention allows a user to remove the lock cylinder without having to detach the entire assembly from the door. In particular, a lockable bolt assembly (1) is disclosed which includes a housing (2), a bolt (4), a base (15) which mounts to a door, a cover (17) which is detachable from the base (15), and a lock mechanism having a lock cylinder (12) which is accessible through an aperture (21) in the cover (17). The lock mechanism is adjustable between an unlocked condition, in which the bolt (4) can be moved, and a locked condition in which the bolt (4) is inhibited from moving. The cover (17) is only detachable from the base (15) when the bolt (4) is removed from the housing (2). The lock cylinder is subsequently only removable from the housing (2) after the cover (17) has been detached from the base (15).

Description

LOCKABLE BOLT ASSEMBLY This invention relates to a lockable bolt assembly for use with a door.

The lockable bolt assembly is of the kind that includes a housing, and a bolt that is removable from the housing, often referred to as a lockable drop bolt. The lockable bolt assembly has been designed for use with doors in commercial, industrial and retail (hereinafter collectively referred to as commercial) buildings and it will be convenient to herein after describe the invention with reference to this application. It should be appreciated however that the lockable bolt assembly may have other applications, for example in residential buildings, or use with movable windows.

Commercial buildings can be exposed to members of the public for repeated and extended periods of time without supervision or inspection. The doors are generally the most logical point for unauthorised access. Whilst a key controlled mortice lock is often installed at a convenient height at a side edge of the door, a lockable bolt assembly can supplement the security at the top or bottom edge of the door. This can facilitate resisting the door being kicked and bent in at the upper or lower corner, which is a form of security breach commonly perpetrated on buildings of this kind.

Commercial buildings are often rented and the tenancy can regularly change. It is common that the incoming tenant change the coding on the cylinder locks so as to inhibit the outgoing tenant from gaining access. With a mortice lock the cylinder lock can generally be removed while leaving the mortice lock substantially intact and installed in the door. However for a lockable bolt assembly it is generally required that the housing be detached from the door, and disassembled in order to gain access to the cylinder lock within the housing. Whilst this is time consuming it is also generally undesirable to detach and reattach the housing to the door, particularly if it involves fixing screws to a timber door, as this can compromise the attachment of the housing to the door.

The lockable bolt assembly can be installed at the top or bottom edge of the door. Whilst this requires the lockable bolt assembly to be inverted when adjustable lock bolt assembly installed at the top of the door, it is generally undesirable for the cylinder lock to be inverted particularly where it includes pin tumblers. It is generally conventional that a user will expect to insert a key into a keyway of the barrel with the bittings on the key at an upper edge thereof, and it is also preferred from a design reliability perspective that the pin tumblers and compression springs be located above the bittings. However adjusting the orientation of the cylinder lock relative to the lockable bolt assembly is often a technical and time consuming task.

The keyway in the cylinder lock of the lockable bolt assembly is often the focus for unauthorised users attempting to vandalise or try to circumvent the security of the lockable bolt assembly. Often vandals will jamb the keyway with a shaft that can’t be removed, preventing operation of the cylinder lock. Given that the cylinder lock is exposed for extended periods of time unauthorised users can use sophisticated circumvention tools that damage the cylinder lock and prevent its operation. Whilst the lockable bolt assembly may withstand the attempted security breach, it will generally need to be significantly compromised or destroyed by the authorised user in order to gain access to the commercial building.

A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was, in Australia, known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims.

According to one aspect of this invention there is provided a lockable bolt assembly for use with a door including a housing, a bolt movable relative to the housing between an extended position and a removed position whereby the bolt extends through and is removed from the housing respectively, a lock mechanism which includes a lock cylinder within the housing, the lock mechanism is adjustable between an active condition and an inactive condition whereby in the active condition the bolt is inhibited from moving from at least the extended position and in the inactive condition the bolt can be moved from at least the extended position respectively, the housing including a base for mounting to the door and a cover that is detachable from the base when the bolt adjustable lock bolt assembly is in the removed position, the housing having an aperture through which a face of the lock cylinder is accessible, whereby detaching the cover from the base facilitates removal of the lock cylinder from the housing. The ability of allowing the base to remain attached to the door while the cover is removed helps to reduce the likelihood of adversely affecting the integrity of the attachment of the housing to the door while changing the lock cylinder or more specifically the coding of the lock cylinder. The changing of the coding of the lock cylinder is likely to occur more regularly where the lockable bolt assembly is installed in a commercial building where the tenants change more regularly. This arrangement simplifies the process of changing the coding of the cylinder lock.

The lockable bolt assembly may include a cylinder retainer associated with the cover which interacts with the cylinder to retain the face of the cylinder proximate the aperture in the housing. The retainer may take any suitable form and one form includes a support member which supports the lock cylinder, and at least one fastener which fastens the support member to the cover. It is preferred that the form of the retainer allow the orientation of the cylinder support relative to the cover is adjustable so as to adjust the orientation of the face of the lock relative to the cover. It is more preferred that the cylinder support is adjustable relative to the cover by 180º, so as to allow the keyway to remain in an upright configuration regardless of whether the housing in is an upright or inverted orientation to suit for example, an installation on a left hand opening or right hand opening door.

The lock mechanism may interact with the bolt in any suitable manner and one preferred arrangement includes a detent that interacts with the bolt and is adjustable between a locked position and a released position which corresponds to the lock mechanism adopting the active condition and the inactive condition respectively. The manner in which the detent moves to adjust between the locked and released position may include the detent being rotatable about a lock axis when adjusting between the locked position and the released position. However this form of movement may vary to include, for example rectilinear movement. The detent preferably includes a projecting portion that may take any suitable form so that when the detent is rotated it the portion interacts with the bolt. This may include a flange portion and the bolt adjustable lock bolt assembly includes a recess whereby the flange portion is aligned with the recess in the bolt when the detent is in the locked condition. The housing may also include an abutment that can interact with the flange portion when the detent is in the released position so as to limit movement of the detent towards the locked position. This has the advantage of reducing the likelihood of the that the user will rotate the barrel of the cylinder lock without adjusting the detent to locked position. It is preferred that the orientation of the flange relative to the abutment is adjustable while the cover is detached from the base so as to allow a selection of a rotational direction between clockwise and anti-clockwise of movement of the detent from the released positon towards the locked position.

This allows the installer to maintain a convention for the direction of rotation of the barrel relative to the side of door, regardless of whether the lockable bolt assembly is installed on the left hand side or right hand side of the door. This in turn provides the end user, for example the tenant, with a more consistent approach for using the lockable bolt assembly. It is particularly beneficial when the tenant my need to operate multiple lockable bolt assemblies.

The lock mechanism may include a cam which moves with a barrel of the cylinder lock, and the detent includes a body portion which is configured to interact with the cam so as to allow loss motion between the barrel and the detent. The cam and the body portion may be configured in any suitable manner, however it is preferred that the configuration of the body portion is adjustable so as to allow for adjustment in the orientation of the cylinder lock through 180º. This adjustment of the body portion will facilitate maintaining the convention in the direction of rotation of the detent relative to the edge of the door, regardless of the orientation of the cylinder lock. It is preferred that the loss motion is 90º, however this may vary depending upon the rotation required to move the detent to the locked position.

It is preferred that the base of the lockable bolt assembly includes an aperture through which the position of the detent can be adjusted. The aperture is preferably located on the base in a position difficult to immediately access, and therefore locating the aperture is in a rear wall of the base which can be positioned adjacent the door when in use impedes immediate access to the aperture. However the user can access the aperture, provided they can drill adjustable lock bolt assembly through the door. In this regard it tis preferred that the housing includes a backing plate for location on an opposite side of the door from the base, the backing plate including at least one fastener receptor for receiving a fastener when attaching the base and backing plate to the door, and an aperture locator for indicating the location of the aperture in the base. Including an indicator on the backing plate has the advantage of indicating to the user where the aperture in the base is, so as to guide the user when drilling. It is further preferred that the detent is configured to interact with a driver by way of the aperture in the base so as to adjust the position of the detent between the locked position and the released position. The configuration of the detent in this manner facilitates its rotation by, for example a screw driver or the like, once access to the aperture is gained.

It is preferred that the base includes at least one bolt guide defining in part a passageway for the bolt when moving between the extended position and the removed position. It is further preferred that the cover includes a bracket that interacts with the bolt when in the extended position to inhibit removal of the cover when the bolt is in the extended position. It is still further preferred that the lockable bolt assembly include at least one fastener for detachably fastening the cover to the base, wherein access to the at least one fastener is inhibited by the bolt when the bolt is in the extended position and permitted when the bolt is in the removed position. Each of these preferred features inhibit the ability of the lockable bolt guide to be tampered with.

It is preferred that the lockable bolt assembly include at least one catch located within the housing, and the bolt includes a groove which interacts with the at least one catch to hold the bolt in the housing at an at rest position which is between the extended position and the release position. The catch may take any form and a preferred form includes a pair of catches, each catch including a ball and biasing element urging on the ball. It is further preferred that the bolt includes at least one aperture, and a stop that is locatable in the aperture, whereby the stop interacts with at least one obstruction in the housing so as to obstruct movement of the bolt to the removed position. It is further preferred that the bolt has a longitudinal axis about which the bolt can pivot so that the stop can avoid the obstruction. This arrangement of the stop and obstruction adjustable lock bolt assembly provides the advantage of making removal of the bolt from the housing more difficult. Furthermore when the lockable bolt assembly is in an inverted position it inhibits the bolt from falling out of the housing. It is preferred that the aperture in the bolt is threaded and the stop includes a threaded shaft configured to screw into the threaded aperture. This has the advantage of allowing the user, or installer, to select if the stop is to be utilised.

Figure 1 is an isometric view of a preferred embodiment of the lockable bolt assembly according to the invention when installed on a door.

Figure 2 is an exploded isometric view of the lockable bolt assembly from Figure 1.

Figure 3A is an isometric view of a cover of the housing in one orientation.

Figure 3B is an isometric view of the cover from Figure 3A in an inverted orientation.

Figure 4A is a front elevation view of the lockable bolt assembly from Figure 1 mounted on a left-hand side of a door in an upright orientation.

Figure 4B is a front elevation view of the lockable bolt assembly from Figure 1 mounted to the left-hand side of a door in an inverted orientation.

Figure 4C is a front elevation view of the lockable bolt assembly from Figure 1 mounted to a right-hand side of the door in an upright orientation.

Figure 4D is a front elevation view of the lockable bolt assembly from Figure 1 mounted to a right-hand side of the door in an inverted orientation.

Figure 5A is a partial front elevation view of V from Figrue 4A with the cover removed and the detent in the release position.

Figure 5B is the view of the lockable bolt assembly from Figure 5A with the detent in the locked condition.

Figure 7 is an illustration of the lockable bolt assembly from Figure 1 from an inner side of the door. adjustable lock bolt assembly Referring firstly to Figure 1 which illustrates the preferred embodiment of a lockable bolt assembly 1 including a housing 2 when mounted to a door 3 with a bolt 4 illustrated in a removed position being removed from the housing 2, and the strike plate 5 mounted to a sill 6 adjacent to the housing 2. When the door 3 is in the closed position adjacent a jamb 7, the housing 2 is aligned with the strike plate 5 so that the bolt 4 may be inserted into the housing 2 and moved therethrough to locate a distal end 8 of the bolt 4 can locate within an aperture 9 formed in the strike plate 5. An example of the bolt 4 in this extended position is illustrated in Figure 4A in which a proximal end 10 of the bolt 4 is positioned adjacent an upper side 11 of the housing 12. It ought to be appreciated from Figure 1 that by comparing the length of the bolt 4 to the length of the housing 2 that once the bolt 4 is in the extended position the distal end 8 of the bolt would extend through the aperture 9 in the strike plate 5 and locate within a recess (not shown) formed in the sill 6. Once the bolt 4 is in this extended position, movement of the door 3 relative to the jamb 7 is inhibited.

Referring now to Figure 2 the lockable bolt assembly 1 according to the invention includes a lock mechanism that is adjustable between an active condition and an inactive condition whereby in the active condition the bolt 4 is inhibited from moving from at least the extended position and in the inactive condition the bolt 4 can be moved from at least the extended position respectively. The lock mechanism may take any suitable form and in the embodiment illustrated in Figure 2 the lock mechanism includes a lock cylinder 12 and a detent 13 that is rotatably adjustable the detent about a lock axis X-X.

The detent 13 includes a body portion 14 which is secured to a base 15 of the housing 2 via clip 16. Figure 2 illustrates a C-clip 16 for locating in a groove (not visible) at a rear of the body portion 14 however this may vary.

The housing 2 according to at least one aspect of the invention includes a base 15 and a cover 17 that is detachable from the base 15 when the bolt 4 is in the removed position. The manner in which the cover 17 interacts with the base 15 may take any suitable form and in the embodiment illustrated in Figure 2 the cover 17 is fastened to the base 15 by way of a pair of screws 18. The screws are partially visible in Figure 1, and it ought to be appreciated that while the bolt 4 is located in the extended position (see Figure 4) removal of either the adjustable lock bolt assembly screw 18 would be prevented. However, when the bolt 4 is in the removed position the screws 18 can also be removed.

Figure 2 illustrates the lockable bolt assembly 1 including a cylinder retainer 19 for retaining the lock cylinder 12, or more specifically a face of the barrel 20 of the lock cylinder 12 adjacent an opening 21 in the cover 17. The cylinder retainer 19 includes a body portion 22 which is formed with a void to receive the lock cylinder 12 therein, with a pair of flanges 23 extending from either side of the body 22. Each flange 23 is formed with an aperture therein to accommodate a screw fastener 24 for fastening each flange to a rear side of the cover 17 (see Figures 3A and 3B).

Figure 2 illustrates a bracket 25 that is attached to the rear of the cover 12 (see Figures 3A and 3B) by a pair of screws 26. The bracket 25 includes a pair of arms 27 which are spaced apart so as to locate within slots 28 formed in a pair of ribs 29 formed with the base 15. The base is formed with a total of four ribs 29 which together define in part a bolt guide for guiding the bolt 4 as it is moved through the housing 2. The arms 27 on the bracket 25 locate behind the bolt 4 when the cover 17 is attached to the base 15, and the bolt 4 is in the bolt guide so as to further inhibit detachment of the cover 17 from the base 15.

Figure 2 also illustrates a pair of ball catches 30 which are located within the housing 2 when assembled. Each ball catch 30 is formed by a support member 31 for supporting a compression spring 32 which urges a ball 33 towards engaging with the bolt 4. The bolt 4 is formed with a plurality of dimples 34 adjacent the proximal end 10 thereof within which one of the balls 33 can seat to retain the bolt 4 in a rest position relative to the housing 2. The relative location of each ball catches 30 within the housing 2, and the dimples 34 on the bolt 4 are such that when the bolt 4 is in the rest position the distal end 8 of the bolt 4 does not protrude beyond the housing 2 to such an extent that it avoids engagement with the strike plate 5. It ought to be appreciated that the provision of two ball catches 30 are positioned within the housing so that the bolt 4 can be retained in the rest position regardless of whether the bolt 4 is inserted through the upper wall 11 or lower wall 35 of the housing 2. adjustable lock bolt assembly Figure 2 also illustrates the bolt 4 being formed with a pair of openings 36 adjacent the dimples. Each opening 36 is preferably threaded to receive a single grub screw 37 or the like therein so that the grub screw 37 can protrude slightly from an external surface of the bolt 4. Each of ribs 39 are dimensioned or configured with a slot 38 to allow the grub screw 37 to pass therethrough when the bolt 4 is in a particular rotational position relative to the ribs 29. Once the bolt 4 is inserted so as to position the grub screw 37 between the middle pair of ribs 29, the bolt 4 can be rotated out of the preferred rotational position so that the grub screw 37 acts as a stop and the middle ribs 29 act as obstructions to prevent removal of the bolt 4 from the housing 2 in any position other than the preferred rotational position. This particularly useful when the bolt 4 has been inserted through the lower wall 35, and the ball catch 30 has failed to retain the bolt 4 as may occur if the door is slammed. The grub screw 37 will engage the lower of the middle ribs 29 to prevent the bolt 4 from falling out of the housing 2.

Figure 2 also illustrates a rear wall 39 of the base 15 separated from the side walls 40, 41, top wall 11 and bottom wall 35 of the base. It ought to be appreciated that alternatively the rear wall 39 could be formed integrally with the side walls 40, 41, top wall 11 and bottom 35 wall of the base 15. The rear wall 39 of the base 15 is formed with an aperture 42 therethrough to provide access to a rear of the body portion 14 of the detent 13. The backing plate 43 as illustrated in Figure 2 is also formed with an aperture 44 therethrough that when the lockable bolt assembly 1 is installed in the door 3 is aligned with the aperture 42 formed in the rear wall 39 of the base 15. The aperture 44 in the backing plate 43 is merely preferred and could be substituted by some form of guide indicator or sticker to indicate where the opening 42 in the rear wall 39 is located. In the event that the cylinder lock 12 is vandalised, access to the detent 13 can be gained by drilling a hole through the backing plate 43 to the opening 42 in the rear wall 39, 40 allow the detent 13 to be rotated to a release position.

It ought to be appreciated when comparing the orientation of the housing 2 as illustrated in Figures 4A or 4B, with the housing 2 as illustrated in Figures 4C and 4D, that this involves an inversion of the housing 2, however the adjustable lock bolt assembly lock cylinder 12 remained in an upright orientation. It is preferred that lock cylinders particularly those incorporating pin tumblers, operate more reliably when the bible 45 (see Figures 3A and 3B) of the cylinder lock 12 is positioned above the barrel 20. Accordingly, the cylinder retainer 19 and the inner surface of a cover 17 are configured to enable the orientation of the cylinder retainer 19, and therefore the orientation of the lock cylinder 12, to be adjusted to retain the cylinder lock in an upright orientation regardless of the orientation of the housing 2.

Referring now to Figures 5A to 5D which illustrate the detent 13 being adjusted between a released position as illustrated in Figures 5A and 5C, and a lock position as illustrated in 5B and 5D. Referring initially to Figure 5A which illustrates the detent 13 including the body portion 14 and a peripheral flange portion 46 at the 12 o'clock position. The detent 13 includes a drive bar 47, and it can be appreciated from Figure 2 that the drive bar 47 is secured to the body portion 14 by way of a centrally located screw 48. The drive bar 47 locates partially in a vertically aligned recess (obscured), and is configured to interact with wedge formations 49 of a cam 50 (see also Figure 3A) shown in cross- section which is secured to a rear of the barrel 20 of the lock cylinder 12.

Figure 5A also illustrates the bolt 4 located in the bolt guide between the middle two ribs 29 with a recess 51 (see also Figure 2) of the bolt 4 free of interference 13 from the detent. When the detent 13 is illustrated in the position illustrated in 5A, it ought to be appreciated that the bolt 4 can be removed from the housing Figure 5B illustrates the wedges 49 of the cam 50 (See Figure 3A) having being rotated in an anti-clockwise direction which in turn rotates the detent 13 so that the flange portion 46 occupies the recess 51 formed in the bolt 4. When the detent 13 is in this locked position, the bolt 4 is prevented from being removed from the housing 2. It should also be noted that there is lost motion between the wedges 49 of the cam 50 and the drive bar 47. This allows the cam 50 to be turned in the clockwise direction through 90 degrees which returns the keyway 52 (see Figure 2) of the barrel 20 to the vertical orientation and allow the key (not shown) to be removed from the lock cylinder 12. adjustable lock bolt assembly It can be noted from Figure 5A that an abutment 53 is formed on the side wall 41 to prevent rotation of the detent 13 in a clockwise direction when it is in the release position. Whilst not apparent from Figures 5A and 5B, over rotation of the detent 13 passed the released position as illustrated in Figure 5B is prevented by the flange portion 46 engaging a lip portion 54 (see Figures 3A or 3B) on the cylinder retainer 19.

It should be noted that the arrangement of the detent 13 and the drive bar 47 as illustrated in Figures 5A and 5B correspond to either one of the installations illustrated in Figures 4A and 4B. It is preferred that the convention for rotation of the detent 13 be such that the barrel 20 is rotated towards the free-edge of the door 3 regardless of the location of the lockable bolt assembly.

Accordingly, the detent 13, and more particularly the orientation of the drive bar 47 relative to the detent body 14 is adjusted to the orientation illustrated in Figures 5C and 5D when the lockable bolt assembly 1 is installed on the right- hand side of the door as illustrated in Figures 4C and 4D. Again this allows the cam 50 to be rotated in a clockwise direction towards the free edge of the door 3 to in turn rotate the detent 13 from the released position illustrated in Figure 5C to the locked position as illustrated in Figure 5D. Again, the lost motion between the wedges 49 of the cam 50 and the drive bar 47 allow the barrel to return to the vertical orientation so that the key (not shown) may be withdrawn from the keyway 52. It should be appreciated that the cover 17 must be detached from the base 15 to allow adjustment of the position of the detent 13 relative to the side wall 41, and the centrally located screw 48 must be released to allow for adjustment of the drive bar 47 through 90 degrees.

Referring again now to Figure 7 and in particular the rear view of the detent 13 which is illustrated as being formed with a drive socket 55. It should be appreciated that once a hole is drilled through the backing plate 43 and through the door 3 that access to the detent 13 can be gained for using a screw driver or the like to rotate the detent 13 from the lock position, in the event that the cylinder lock has been vandalised.

The lockable bolt assembly 1 as hereinbefore described provides a relatively simple solution for facilitating adjustment to suit installation on either a adjustable lock bolt assembly left-hand side or right-hand side of the door 3. Furthermore, the ease with which the cylinder lock 12 can be accessed to adjust its coding renders the lockable bolt assembly 1 most suitable for commercial environments. Still furthermore the ability to adjust the position of the detent 13 independently of the cylinder lock 12 provides a surprisingly useful advantage.

Future patent applications may be filed in Australia or overseas on the basis of or claiming priority from the present application. It is to be understood that the following provisional claims are provided by way of example only, and are not intended to limit the scope of what may be claimed in any such future application. Features may be added to or omitted from the provisional claims at a later date so as to further define or re-define the inventions. adjustable lock bolt assembly

Claims (25)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A lockable bolt assembly for use with a door including a housing, a bolt movable relative to the housing between an extended position and a removed position whereby the bolt extends through and is removed from the housing respectively, a lock mechanism which includes a lock cylinder within the housing, the lock mechanism is adjustable between an active condition and an inactive condition whereby in the active condition the bolt is inhibited from moving from at least the extended position and in the inactive condition the bolt can be moved from at least the extended position respectively, the housing including a base for mounting to the door and a cover that is detachable from the base when the bolt is in the removed position, the housing having an aperture through which a face of the lock cylinder is accessible, whereby detaching the cover from the base facilitates removal of the lock cylinder from the housing.

2. A lockable bolt assembly according to claim 1 including a cylinder retainer associated with the cover which interacts with the cylinder to retain the face of the cylinder proximate the aperture in the housing.

3. A lockable bolt assembly according to claim 2 wherein the cylinder retainer includes a support member which supports the lock cylinder, and at least one fastener which fastens the support member to the cover.

4. A lockable bolt assembly according to claim 3 wherein the orientation of the cylinder support relative to the cover is adjustable so as to adjust the orientation of the face of the lock relative to the cover.

5. A lockable bolt assembly according to claim 4 wherein the cylinder support is adjustable relative to the cover by 180º.

6. A lockable bolt assembly according to any one of claims 1 to 5 wherein the lock mechanism includes a detent that interacts with the bolt and is adjustable between a locked position and a released position which corresponds to the lock mechanism adopting the active condition and the inactive condition respectively.

7. A lockable bolt assembly according to claim 6 wherein the detent is rotatable about a lock axis when adjusting between the locked position and the released position. adjustable lock bolt assembly

8. A lockable bolt assembly according to claim 7 wherein the detent includes a flange portion and the bolt includes a recess whereby the flange portion is aligned with the recess in the bolt when the detent is in the locked condition.

9. A lockable bolt assembly according to claim 8 wherein the housing includes an abutment that can interact with the flange portion when the detent is in the released position so as to limit movement of the detent towards the locked position.

10. A lockable bolt assembly according to claim 9 wherein the orientation of the flange relative to the abutment is adjustable while the cover is detached from the base so as to allow a selection of a rotational direction between clockwise and anti-clockwise of movement of the detent from the released positon towards the locked position.

11. A lockable bolt assembly according to any one of claims 6 to 10 wherein the lock mechanism includes a cam which moves with a barrel of the cylinder lock, and the detent includes a body portion which is configured to interact with the cam so as to allow loss motion between the barrel and the detent.

12. A lockable bolt assembly according to claim 11 wherein the configuration of the body portion is adjustable so as to allow for adjustment in the orientation of the cylinder lock through 180º.

13. A lockable bolt assembly according to claim 11 or 12 wherein the loss motion is 90º.

14. A lockable bolt assembly according to any one of claims 6 to 13 wherein the base includes an aperture through which the position of the detent can be adjusted.

15. A lockable bolt assembly according to claim 14 wherein the aperture is in a rear wall of the base which can be positioned adjacent the door when in use.

16. A lockable bolt assembly according to claim 14 or 15 wherein the housing includes a backing plate for location on an opposite side of the door from the base, the backing plate including at least one fastener receptor for receiving a fastener when attaching the base and backing plate to the door, and an aperture locator for indicating the location of the aperture in the base.

17. A lockable bolt assembly according to any one of claims 14 to 16 wherein the detent is configured to interact with a driver by way of the aperture adjustable lock bolt assembly in the base so as to adjust the position of the detent between the locked position and the released position.

18. A lockable bolt assembly according to any one of the preceding claims wherein the base includes at least one bolt guide defining in part a passageway for the bolt when moving between the extended position and the removed position.

19. A lockable bolt assembly according to any one of the preceding claims wherein the cover includes a bracket that that interacts with the bolt when in the extended position to inhibit removal of the cover when the bolt is in the extended position.

20. A lockable bolt assembly according to any one of the preceding claims including at least one fastener for detachably fastening the cover to the base, wherein access to the at least one fastener is inhibited by the bolt when the bolt is in the extended position and permitted when the bolt is in the removed position.

21. A lockable bolt assembly according to any one of the preceding claims including at least one catch located within the housing, and the bolt includes a groove which interacts with the at least one catch to hold the bolt in the housing at an at rest position which is between the extended position and the release position.

22. A lockable bolt assembly according to claim 21 wherein the at least one catch one includes a pair of catches, each catch including a ball and biasing element urging on the ball.

23. A lockable bolt assembly according to any one of the preceding claims wherein the bolt includes at least one aperture, and a stop that is locatable in the aperture, whereby the stop interacts with at least one obstruction in the housing so as to obstruct movement of the bolt to the removed position.

24. A lockable bolt assembly according to claim 23 wherein the bolt has a longitudinal axis about which the bolt can pivot so that the stop can avoid the obstruction.

25. A lockable bolt assembly according to claim 24 wherein the aperture in the bolt is threaded and the stop includes a threaded shaft configured to screw into the threaded aperture. adjustable lock bolt assembly