AU2002250818B2 - Automatic-lung regulator for compressed-air respiration apparatus - Google Patents
Automatic-lung regulator for compressed-air respiration apparatus Download PDFInfo
- Publication number
- AU2002250818B2 AU2002250818B2 AU2002250818A AU2002250818A AU2002250818B2 AU 2002250818 B2 AU2002250818 B2 AU 2002250818B2 AU 2002250818 A AU2002250818 A AU 2002250818A AU 2002250818 A AU2002250818 A AU 2002250818A AU 2002250818 B2 AU2002250818 B2 AU 2002250818B2
- Authority
- AU
- Australia
- Prior art keywords
- oxygen system
- molded
- mounting piece
- spring
- lever mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B31/00—Containers or portable cabins for affording breathing protection with devices for reconditioning the breathing air or for ventilating, in particular those that are suitable for invalids or small children
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Description
AugO42eng dQc 1 Description AUTOMATIC-LUNG REGULATOR FOR COMPRESSED-AIR
RESPIRATION
APPARATUS
This invention relates to an oxygen system for compressed air breathing apparatuses with a respiration-operated and spring-loaded membrane to create positive pressure for controlling an air supply valve and a locking lever for locking the membrane in periods of non-operation.
Oxygen systems of this type have been known for a long time. They are installed between the pressure reducing valve of a compressed air reservoir and a user's breathing mask and ensure provision of a specific respiratory air quantity at a pressure suitable for the human system. The valve that releases the air supply from the pressure reducer to the oxygen system is operated using a control membrane moved by the vacuum created when the user inhales. In the positive pressure variant of an oxygen system, a constant slight positive pressure is created in the oxygen system by a spring force that acts on the opposing membrane surface.
To prevent further discharge of air in a positive pressure oxygen system after its removal from the respiratory mask or after removing the respiratory mask from the user's head, or to prevent the free discharge of air after connecting the system to a compressed air supply, the known oxygen systems are equipped with a manually operated stop mechanism that keeps the control membrane in its upper position against the spring force that acts on the membrane. This stop mechanism consists of a locking lever that can be pivoted around a hinge pin and whose one end engages in the membrane and keeps it in 11 the groove of a leaf spring. When the user is to be supplied with air after putting on the respiratory mask or connecting the oxygen system, respectively, the vacuum created by initial inhaling and the force that the control membrane applies to the locking lever cause the release of the other lever end from the spring lock, which returns the oxygen system to its operational state.
But the intended easy release of the locking lever is accompanied by the disadvantage that the locking lever is released just as easily when a mechanical force acts on the oxygen system so that there can be an uncontrolled discharge of compressed air when the oxygen system is detached from the user that is not available when the compressed air breathing apparatus is used again.
It is therefore the problem of this invention to design the shift mechanism for blocking or allowing air supply in an oxygen system in such a way that a user can easily release it by inhaling but that the locking position is securely retained during mechanical vibrations in periods of non-operation- This problem is solved according to the invention by the oxygen system comprising the characteristics described in claim 1.
In other words, it is the concept of the invention to arrange a first spring element that grips with little friction on the pivoted molded lever mounting piece. This spring element is capable of securing the locking lever to a stopper when the oxygen system is in operation and thus does not affect the free movement of the membrane.
When the locking lever is manually switched to the locking position, such as in a period of non-operation, the molded lever mounting piece is additionally locked behind a second spring element with the support of the 11 Aug042eng.doc 3 first spring element. However, this second spring element can be moved to a limited extent in longitudinal direction so that it will continue to cover the molded lever mounting piece during inevitable vibrations in periods of non-operation and thus retain the lever even better. When the oxygen system is returned to service, the second spring element is moved upward by the molded piece upon inhaling without any noticeable resistance.
Subsequently, the spring forces of the first and second spring elements acting on the molded piece are easily overcome when inhaling.
The proposed shift mechanism ensures the blocking of the air supply in periods of non-operation as the locking lever in blocking position cannot even be released by impacts acting on the oxygen system. Unintentional discharge of air is thus excluded. Despite the secure locking, the locking lever can be returned to its operating position just by inhaling, as the second spring element is easily moved by the molded piece and only small spring forces are required for the final release of the locking lever. In the operating position, the locking lever is also securely fixed by the first spring element.
In an aspect of the invention, the first spring element is a leaf spring charged in longitudinal direction that is supported in a low-friction manner in a groove of the molded lever mounting piece and in a groove of a static portion of the oxygen system.
In another aspect of the invention, the second spring element (safety fastening) includes a movably guided slide bar that comprises a catch spring element on the side of the molded lever mounting piece. The catch spring element consists of an approximately semicircular receiving part for covering the molded lever mounting Aug042en~ doc 4 piece and a slope for lifting the second spring element when switching to the locking position. A back square for limiting the longitudinal movement of the second spring element (safety fastening) in both directions is provided on the other end of the slide bar.
In yet another aspect of the invention, the molded lever mounting piece comprises a rounded sliding surface in the interlocking section with the catch spring element to be able to easily move the second spring element along the slope or in the receiving part by its rotation.
The claims disclose further characteristics and advantageous improvements of the invention.
An embodiment of the invention is explained in greater detail below with reference to the figures. Figures 1 through 5 are schematic views of various switching positions of a shift mechanism for a positive pressure oxygen system.
Fig. 1 shows the shift.mechanism in its manually blocked but balanced position; Fig. 2 shows the shift mechanism according to Fig. 1 still in a position that blocks air supply after vibration due to impact; Fig. 3 shows the shift mechanism after initial inhaling and in operation; Fig. 4 shows the shift mechanism while being manually shut off; Fig. 5 shows the shift mechanism while switching from the locking position to the breathing position.
Aug042erg.doc According to Figs. 1 bis 5, the shift mechanism comprises a pivoted locking lever 1 that in its upper position shown, for example, in Fig. 1, forms a stopper for a membrane plate 2 that is constantly subjected to the action of a pressurized spring (not shown) and connected to a respiration-operated membrane (not shown). This membrane plate 2 is connected via a linkage system (not shown) to a closing mechanism for a valve 3 via which the air supply from a compressed air reservoir with pressure reducer (not shown) is allowed or blocked. While using a compressed air breathing apparatus, the locking lever 1 constantly is held in the lower position shown in Fig. 3 and is spring-mounted, due to the action of the leaf spring 4, to a stopper formed by the valve 3. Thus the membrane plate 2 can move downward (into the direction of the locking lever 1 that is held to the stopper) as a result of thevacuum created with every breath the user takes. After each breath the user takes, the membrane plate 2 that is connected to the membrane is pressed upward and the valve 3 is shut so that the desired positive pressure in the oxygen system is maintained by the pressurized spring that acts on the membrane plate 2 from above.
The locking lever 1 is connected to a molded lever mounting piece 5 that is pivoted in a hinge joint 6. The molded piece 5 is used together with the retaining spring 4 to hold the locking lever 1 in its lower position, e.g.
its operating position, or in its upper position in which the air supply is completely blocked. The leaf spring 4 comprises a central bulge 4a and is spring-mounted on its two front edges in a wedge-shaped groove 7 of the molded lever mounting piece 5 or in a wedge-shaped groove 8 of a guide 9. This design and arrangement of the retaining spring 4 ensures low-friction movement of the locking AugO42eng.doc 6 lever 1 so that only minor counterforces have to be overcome when the oxygen system is returned to service from its blocked position and the locking lever 1 is moved into its operating position by mere inhaling. The oxygen system is placed out of service, e.g. any air supply is interrupted, using a pushbutton located where the arrow F in Fig. 4 points on the casing of the oxygen system. When the pushbutton is pressed, the molded piece is moved into a generally vertical position shown in Fig. 1 and is held in this position by the leaf spring 4 and additionally by the safety holding device To prevent the locking lever 1 from moving on its own to the lower position, e.g. the operating position, in which air can permanently flow off due to the spring pressure that acts on the membrane plate 2, a safety holding device 10 is provided in addition to the leaf spring 4.
This safety holding device 10 includes a slide bar 11, a back square 12 mounted to the lower end of the slide bar 11 and a catch spring element 13 mounted at an angle to the upper end of the slide bar 11. The slide bar 11 is guided at a spacing from the hinge joint 6 of the molded lever mounting piece 5 in the guide 9 and can be moved depending on the measure of said spacing between the guide 9 and and a stopper 14 formed by the casing of the oxygen system as indicated by arrow A. The catch spring element 13 is formed by a receiving part 13a adjacent to the slide bar 11 and curved in an approximately semicircular shape and a slope 13b protruding upward at an angle from the end of the receiving part 13a.
When the pushbutton is pressed (arrow F) to place the oxygen system out of service, the rounded end of the molded lever mounting piece 5 first slides along the slope 13a until the safety level holding device reaches its upper position in which the back square abuts AugO42eng.doc 7 against the guide 9. Then the rounded end of the molded piece slides into the receiving part 13a by overcoming the spring force of the catch spring element 13.
In this way, the locking lever 1 is fixed in its locking position by both the leaf spring 4 and the safety holding device 10. The locking lever 1 cannot readjust on its own as a result of a vibration caused by impact as in this case the safety holding device 10, due to its weight, slides downward until it reaches the stopper, thereby locking the molded lever mounting piece 5 even more securely into the receiving part 13a. Despite this secure locking of the molded lever mounting device 5 that is connected to the locking lever 1, the oxygen system can be returned to service by mere inhaling, as the safety holding device 10, due to the pressure applied onto the membrane plate 2, is easily moved upward to the point where the stop of the back square 14 abuts on the guide 9, and subsequently overcomes the spring force of the catch spring element 13 and the leaf spring 4.
The shift mechanism described above ensures, on the one hand, safe blocking of the air supply so that no air is lost from the compressed air reservoir. However, the oxygen system connected to the breathing apparatus can immediately be returned to service as the forces that hold the locking lever can be overcome by mere inhaling using the proposed shift mechanism. In the operating position, the locking lever 1 is also securely held in a lower stop position.
The function of the shift mechanism is explained once again with reference to Figs. 1 through According to Fig. 1, the locking lever 1 was moved upward into its locking position as indicated by arrow B and AugO42eng.doc 8 acts on the membrane plate 2 (arrow The air supply is blocked. The safety holding device 10 is in its upper position delimited by back square 12.
When the oxygen system is hit by an impact upon which as shown in Fig. 2 the membrane plate 2 and the locking lever 1 move as indicated by arrows C and B, respectively, this undesirable movement of the locking lever 1 and the membrane plate 2 that would result in air loss is prevented in that the safety holding device falls downward so that the molded lever mounting piece is completely held in the receiving part 13a.
Fig. 3 shows the shift mechanism in its operating position in which the locking lever 1 is firmly held to a stopper (not shown) using the leaf spring 4 and the membrane plate 2 operated by inhaling can freely move upward and downward to open and close the valve 3 for the air supply to the user.
Fig. 4 finally shows how the oxygen system is placed out of service. The locking lever is moved in the direction of arrow B using the pushbutton (arrow and the safety holding device 10 is moved upward because of the motion of the molded lever mounting piece 5 along the slope 13b in the direction of arrow A until the back square 12 abuts on the guide 9. If the pushbutton is kept depressed (arrow the molded lever mounting piece reaches the position shown in Fig. 1 by overcoming the spring force of the catch spring element 13. The rigid slide bar 11 is supported laterally on its upper section (not shown), too and cannot move aside when a force is applied to it.
Fig. 5 shows how the oxygen system is brought into service in that the user starts breathing causing the Aug042eng.dc 9 membrane plate 2 to apply pressure as indicated by arrow C onto the locking lever 1 so that it can move in the direction of arrow B, lift the safety holding device until it abuts on the guide 9, and subsequently overcome easily the spring forces exerted by the catch spring element 13 and the leaf spring 4.
Claims (9)
1. An oxygen system for compressed air breathing apparatuses with a respiration-operated and spring- loaded membrane to create positive pressure for controlling an air supply valve and a locking lever for locking the membrane in periods of non-operation, characterized in that the locking lever is connected to a pivoted molded lever mounting piece that is kept both in the release position and in the blocking position of the membrane by a low-friction spring mounting and to which a second spring element whose movement is limited in longitudinal direction is provided as a safety holding device (10) behind which the molded lever mounting device can additionally be spring-locked, said safety holding device moving weight-dependent on its own in the event of an impact to encompass the molded lever mounting device even more.
2. The oxygen system according to claim 1, characterized in that a leaf spring charged in longitudinal direction is provided to create the first spring force that acts on the molded lever mounting piece
3. The oxygen system according to claim 2, characterized in that the leaf spring is flexibly supported on its narrow front sides in grooves and that are located in the molded lever mounting piece or a static part of the valve body, respectively.
4. The oxygen system according to claim 3, characterized in that the grooves 8) are arranged slantingly. Augo42eng.doc 11 The oxygen system according to claims 3 and 4, characterized in that the grooves 8) are wedge- shaped.
6. The oxygen system according to any one of the claims 1 through 5, characterized in that the molded lever mounting piece comprises a rounded sliding surface on the side opposite the groove (7)
7. The oxygen system according to any one of the claims 1 through 6, characterized in that the molded lever mounting piece sits in a hinged joint and comprises a pushbutton (arrow F) for manually swiveling the locking lever into its locking position on the side facing away from the locking lever and under the hinged joint (6) S. The oxygen system according to claim i, characterized in that the safety holding device (10) is a slide bar (11) guided in a guide that turns into a catch spring element (13) consisting of an approximately semicircular receiving part (13a) and an adjacent slope (13b) on the end where the molded lever mounting piece is located and that comprises a back square (12) for limiting the longitudinal movement of the safety holding device (10) in both directions on the opposite end.
9. The oxygen system according to claim 8. characterized in that the safety holding device (10) is molded from spring band steel that is braced by a reinforcing crease in the section of the guided slide bar (11). The oxygen system according to claims 8 and 9, characterized in that the safety holding device is supported in the slide bar (11) section on the Aug42en.doc 12 casing of the oxygen system on the side opposite the molded lever mounting piece
11. The oxygen system according to claims 8 through characterized in that, in the locking position of the locking lever the molded lever mounting piece is at first partially and, in the event of vibrations of the oxygen system, even further encompassed by the receiving part (13a) of the catch spring element (13) as the safety holding device (10) sinks into it by gravitation.
12. The oxygen system according to any one of claims 1 through 11, characterized in that the locking lever is either angular or curved in a section distant from the molded lever mounting piece
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001125076 DE10125076C1 (en) | 2001-05-14 | 2001-05-14 | Automatic lung, for pressurized air respiration device, has blocking lever for securing membrane in operating pause provided with safety restraint preventing release by mechanical shock |
| DE10125076.2 | 2001-05-14 | ||
| PCT/DE2002/000920 WO2002092155A1 (en) | 2001-05-14 | 2002-03-12 | Automatic-lung regulator for compressed-air respiration apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2002250818A1 AU2002250818A1 (en) | 2003-05-01 |
| AU2002250818B2 true AU2002250818B2 (en) | 2005-06-09 |
Family
ID=7685817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2002250818A Ceased AU2002250818B2 (en) | 2001-05-14 | 2002-03-12 | Automatic-lung regulator for compressed-air respiration apparatus |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1387708B9 (en) |
| AU (1) | AU2002250818B2 (en) |
| DE (2) | DE10125076C1 (en) |
| ES (1) | ES2278910T3 (en) |
| WO (1) | WO2002092155A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2624748T3 (en) | 2009-04-22 | 2017-07-17 | Nevro Corporation | Selective high frequency modulation of the spinal cord for pain inhibition with reduced side effects, and associated systems and methods |
| DE102019108790B4 (en) * | 2019-04-03 | 2020-11-19 | BartelsRieger Atemschutztechnik GmbH | Demand regulator, in particular for a breathing apparatus |
| CN114602142B (en) * | 2022-02-25 | 2023-10-27 | 江苏康康同学科技有限公司 | Be used for patient's pulmonary function rehabilitation training device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284075A (en) * | 1978-06-17 | 1981-08-18 | Alan Krasberg | Diving headgear for use in return-line diving systems |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2535612B1 (en) * | 1982-11-05 | 1986-04-11 | Lejeune Seitz Ameline Labo | IMPROVED BREATHING VALVE |
| IT1161849B (en) * | 1983-05-19 | 1987-03-18 | Sekur Spa | SWITCHING DEVICE FOR AN AIR DISPENSER INTENDED TO FEED BREATHABLE AIR WITHIN A BREATHING AIR |
| IT216049Z2 (en) * | 1988-12-29 | 1991-04-26 | Amf Mares Spa | AUTOMATIC DISPENSER FOR SELF-BREAKING RATORS |
-
2001
- 2001-05-14 DE DE2001125076 patent/DE10125076C1/en not_active Expired - Lifetime
-
2002
- 2002-03-12 AU AU2002250818A patent/AU2002250818B2/en not_active Ceased
- 2002-03-12 EP EP02719678A patent/EP1387708B9/en not_active Expired - Lifetime
- 2002-03-12 WO PCT/DE2002/000920 patent/WO2002092155A1/en not_active Ceased
- 2002-03-12 DE DE50209289T patent/DE50209289D1/en not_active Expired - Fee Related
- 2002-03-12 ES ES02719678T patent/ES2278910T3/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284075A (en) * | 1978-06-17 | 1981-08-18 | Alan Krasberg | Diving headgear for use in return-line diving systems |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10125076C1 (en) | 2002-05-23 |
| DE50209289D1 (en) | 2007-03-08 |
| WO2002092155A1 (en) | 2002-11-21 |
| EP1387708A1 (en) | 2004-02-11 |
| EP1387708B9 (en) | 2007-10-24 |
| ES2278910T3 (en) | 2007-08-16 |
| EP1387708B1 (en) | 2007-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| PC | Assignment registered |
Owner name: MSA AUER GMBH Free format text: FORMER OWNER WAS: MSA AUER GMBH |
|
| PC | Assignment registered |
Owner name: MSA EUROPE GMBH Free format text: FORMER OWNER WAS: MSA AUER GMBH |
|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |