CN103442769B - For the valve hand wheel of the improvement of self-carrying breathing apparatus - Google Patents
For the valve hand wheel of the improvement of self-carrying breathing apparatus Download PDFInfo
- Publication number
- CN103442769B CN103442769B CN201180069722.7A CN201180069722A CN103442769B CN 103442769 B CN103442769 B CN 103442769B CN 201180069722 A CN201180069722 A CN 201180069722A CN 103442769 B CN103442769 B CN 103442769B
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- Prior art keywords
- button
- handwheel
- spring
- cylinder valve
- inward flange
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/022—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element
- F16K35/025—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element said actuating element being operated manually (e.g. a push-button located in the valve actuator)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/04—Means to prevent accidental or unauthorised actuation yieldingly resisting the actuation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses the design of a kind of cylinder valve handwheel.Cylinder valve handwheel can comprise paired button, and described button arrangement, in the opposite side portion of handwheel, can rotate shifter cylinder valve to make handwheel.Button can have a series of hook tooth, and described hook tooth engages the corresponding hook tooth on the inner surface of handwheel.Can outside spring-biased button, so that the inner surface of the hook tooth of button and handwheel engages, thus locking handwheel rotates and prevents from operating cylinder valve.In order to operate cylinder valve, user only can press button downwards, to make hook tooth depart from, thus allows handwheel to rotate.Described arrangement prevents from being not intended to shifter cylinder valve when user's collision object during use.Describe other embodiment and require its rights and interests.
Description
Technical field
The present invention relates generally to the field of self-carrying breathing apparatus, and more specifically relates to a kind of valve hand wheel of the improvement for using together with self-carrying breathing apparatus.
Background technology
Usually self-carrying breathing apparatus (" SCBA ' s ") is dressed, to provide respirable air to wearer by the individuality of operative activities in hazardous environment (such as when putting out a fire and the environment that fills the air at other cigarette or gas).Tradition SCBA ' s generally includes face shield, one or more pressurized cylinder or tank and flexible pipe.Supply air from tank to face shield via flexible pipe, described face shield covers the nose of wearer, mouth and eye, and comprises for observing extraneous lens.By backrest, tank is fixed on the health of wearer.
Each tank has rated capacity, and described rated capacity is generally standard value, such as 2216psig or 4500psig, this means that in tank, pressure is approximately rated capacity when filling.Cylinder valve is attached on each tank, to discharge forced air from tank when allowing to need.The outlet of cylinder valve is connected to first order pressure reducer, air pressure is decreased to lower level from current pressure (its will equal with rated capacity or lower than described rated capacity) by described first order pressure reducer usually, such as 100psig, and be connected to second level pressure reducer (so-called breathing regulator) from described first order pressure reducer by flexible pipe, at described breathing regulator place, pressure is further reduced to and can breathes level.
As noted, usually in hazardous environment, dress SCBA ' s by the individuality of executed activity, and therefore importantly supply breathable air consistently to user in this case.Because gas tank is quite heavy, and because gas tank is worn on user back, on the object comprised in hazardous environment so tank may collide or scratch usually.In existing cylinder valve design, this collision or scratch undesirably can cause the operation of valve hand wheel.When the worst, this operation can shifter cylinder valve, thus cuts off the gas flowing of leading to user.
Therefore, it is desirable to provide a kind of cylinder valve handwheel of improvement to design, described cylinder valve handwheel design minimizes or eliminates the chance being not intended to shifter cylinder valve between the operating period.This design should minimize or eliminate following possibility: namely can operate handwheel unintentionally in handwheel collision or when scratching to the object in environment.
Summary of the invention
The invention discloses the design of a kind of cylinder valve handwheel.Cylinder valve handwheel can comprise paired button, and described button arrangement, in the opposite side portion of handwheel, can rotate shifter cylinder valve to make handwheel.Button can have a series of hook tooth, and described hook tooth engages the corresponding hook tooth on the inner surface of handwheel.Can outside spring-biased button, so that the inner surface of the hook tooth of button and handwheel engages, thus locking handwheel rotates and prevents from operating cylinder valve.In order to operate cylinder valve, user only can press button downwards, to make hook tooth depart from, thus allows handwheel to rotate.Described arrangement prevents from being such as not intended to shifter cylinder valve when user's collision object during use.
The invention discloses a kind of cylinder valve handwheel.Described cylinder valve handwheel can comprise: handwheel part, and described handwheel part is used for being connected to valve rod; Button, described button is arranged in handwheel part at least partly.Button can have interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip.One of them in the interior lip of button and inward flange part has ratchet component, and another in interior lip and inward flange part has the receiving surface for engages ratchet component.Layout of spring between button and handwheel part, for relative to handwheel part radially outward biases button.Handwheel has primary importance, and in primary importance, ratchet component and receiving surface are biased into and are bonded with each other by spring, to prevent handwheel part from rotating.Handwheel has the second place, and in the second position, button radially-inwardly moves relative to handwheel part, to overcome the bias voltage of spring and to make ratchet component and receiving surface depart from, thus handwheel part can be rotated.
The invention discloses a kind of cylinder valve handwheel.Described cylinder valve handwheel can comprise: handwheel part, and described handwheel part is used for being connected to valve rod; Button, described button is arranged in handwheel part at least in part.Button can have interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip.The interior lip of button can have hook tooth, and inward flange part can have the hook tooth for engaging with the hook tooth of button.Spring can be arranged between button and handwheel part, for relative to handwheel part radially outward biases button.Handwheel has primary importance, and in primary importance, the hook tooth of button is biased into and engages with the hook tooth of inward flange part by spring, to prevent handwheel part from rotating.Handwheel has the second place, and in the second position, button radially-inwardly moves relative to handwheel part, to overcome the bias voltage of spring and to make the hook tooth of button and the hook tooth of inward flange part depart from, thus allows handwheel part to rotate.
The invention discloses a kind of cylinder valve handwheel.Described cylinder valve handwheel can comprise: handwheel part, and described handwheel part is used for being connected to valve rod; With the first button and the second button, described first button and the second button are arranged in handwheel part at least in part.First button and the second button all can have interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip.First spring and the second spring can be arranged in the first button and the second button between corresponding one and handwheel part, for relative to handwheel part radially outward bias voltage first button and the second button.First button all can be connected via ratchet with the interior lip of each in the second button and engages with inward flange part.Handwheel part has primary importance, and in primary importance, the first button and the second button are biased into and engage with inward flange part by the first spring and the second spring, to prevent handwheel part from rotating.Handwheel part has the second place, in the second position, first button and the second button radially-inwardly move relative to handwheel part, with the bias voltage overcoming the first spring and the second spring and the ratchet dockingundocking making between interior lip and inward flange, thus allow handwheel part to rotate.
Accompanying drawing explanation
Present will in an illustrative manner, describe the specific embodiment of disclosed device with reference to the accompanying drawings:
Fig. 1 is the schematic diagram of self-carrying breathing apparatus, and it has the cylinder valve in conjunction with disclosed handwheel;
Fig. 2 is the stereogram of the cylinder valve of the Fig. 1 independently illustrated;
Fig. 3 is the rear sectional view that the cylinder valve of Fig. 3 obtains along lines 3-3;
Fig. 4 is the isometric view of disclosed valve hand wheel;
Fig. 5 is the sectional view that the valve hand wheel of Fig. 4 obtains along lines 5-5; With
Fig. 6 is the sectional view that the valve hand wheel of Fig. 4 obtains along lines 7-7.
Detailed description of the invention
Disclosed handwheel design effectively prevent and by mistake operates via inner ratchet mechanism the SCBA cylinder valve be connected.Ratchet mechanism can be unlocked around one or more buttons that the handwheel circle spacing leaves by operation.Ratchet mechanism prevents hand wheel movements, except the one or more button of non-pushed.By this way, shutoff valve (such as, when user scratches object) is not intended to during preventing operation.Only have when pressing button and make valve hand wheel rotate simultaneously, can shutoff valve.Do not need other behavior to carry out operating valve, and described design effectively prevent from closing the valve opened unintentionally.
Fig. 1 is the schematic diagram of the exemplary self-carrying breathing apparatus (" SCBA ") 10 entrained by fireman or other emergency services worker.SCBA10 comprises at least one pressure vessel 12, pressure reducer 24, cylinder valve 22, second level pressure reduction assembly or adjuster 14, face shield 16 and hose 18.Pressure vessel 12 is pressurized cylinder or tank, and described pressure vessel 12 provides breathing gas source of supply to wearer.Cylinder valve 22 can be operated, to allow air to pass through from pressure vessel 12 during operation.Pressure reducer 24 is connected to cylinder valve 22, and receives forced air source of supply from cylinder valve 22.Hose 18 is connected between pressure reducer 24 and face shield 16 via second level adjuster 14.Pressure reducer 24 and second level adjuster 14 are for being decreased to the level that can be supplied to safely user via face shield 16 by the air pressure in pressure vessel 12.Face shield 16 covers nose and the mouth of wearer in the mode be tightly connected, and preferably covers the eyes of wearer with translucent cover 15, for observing outside.
Tank 12, cylinder valve 22, pressure reducer 24 and miscellaneous equipment use knapsack, backrest etc. to be loaded on the back of user usually, and face shield 16 is placed in user's face, make face shield cover the mouth of user, nose in a conventional manner or both covering.Hose 18 is arranged to extend comfortably between pressure reducer 24 and face shield 16, and does not disturb with the naturally movable of user.Manually can rotate handwheel 49 to open cylinder valve 22, thus allow breathing gas flow through cylinder valve 22 and arrive at face shield 16 by other parts.
Fig. 2 and Fig. 3 shows exemplary cylinder valve 22.As shown, cylinder valve 22 comprises valve body 26, cylinder connection piece 28, valve module 32, pressure gauge assembly 34, buffer protection assembly 36 and relief valve assembly 38.Cylinder connection piece 28 comprises: delivery pipe 42, and described delivery pipe 42 to be arranged in described cylinder connection piece 28 and to extend from it; Pin thread assembly parts 41, described pin thread assembly parts 41 can be integrally formed with valve body 26.Cylinder connection piece 28 is preferably traditional design and size, to make it possible in the end by delivery pipe 42 being inserted into tank 12 and be screwed to by pin thread assembly parts 41 in the negative thread assembly parts of the correspondence in tank 12 be attached to pressure vessel or tank 12 or other standard can.Filler 43 is comprised, to guarantee tight seal around Screw assembly part 41.Screw assembly part 41, delivery pipe 42 and filler 43 can be traditional design.
Valve module 32 can comprise handwheel 49, valve plug and assembly 50, nylon locking nut 56, stem valve 58 and valve gap 62.Valve plug and assembly 50 can be arranged in the hole in valve body 26, and can control gas by valve body 26 when using valve wheel 49 to rotate.
Referring now to Fig. 4-6, disclosed handwheel 49 will be described in more detail.As mentioned previously, handwheel 48 may be used for the cylinder valve 22 opening and closing Fig. 1, to allow to provide air to user, or cuts off air supply when not using cylinder.Particularly, handwheel 49 can rotate to open valve 22 along first direction, and can rotate so that shutoff valve along contrary second direction.
Because user's possibility wearing gloves of SCBA equipment 10, so handwheel can have the outer grip surface 68 being with multiple protruding features part 70, to contribute to grasping handwheel 49 easily.In graphic embodiment, protruding features part 70 comprises multiple longitudinal ridges.Should be understood that, the multiple protruding features part 70 with various different geometry can be applied.
Handwheel 49 can also comprise first and second button 72A, 72B, and described first and second button 72A, 72B are spaced apart on the relative sidepiece of handwheel 49.First and second button 72A, 72B can be received in corresponding depressed part 74A, the 74B in handwheel 49, so that outer surface 76A, 76B of first and second button 72A, 72B are positioned to the grip surface 68 of adjoining handwheel 49.Each in button 72A, 72B all can have interior lip 78A, 78B and outer lip 80A, 80B, described interior lip 78A, 78B and outer lip 80A, 80B are positioned in the opposite side portion of inward flange part 82 of handwheel 49, button 72A, 72B to be remained in handwheel 49.
First and second button 72A, 72B can also all have depressed part 84A, 84B, are furnished with spring 86A, 86B in described depressed part 84A, 84B.The first end of every root spring 86A, 86B can engage end surface 88A, 88B of the depressed part be associated, and the second end of spring 86A, 86B can engage the inner surface 90 of handwheel 49.Arrange thus, spring 86A, 86B can relative to handwheel 49 radially outward button 72A, 72B of being associated of bias voltage.Should be understood that, although first and second spring 86A, 86B are illustrated as disc spring, can also be used any one in other types of springs multiple.
The interior lip of button 72A, 72B and outer lip 78A, 78B, 80A, 80B can spaced apart certain distances, and described distance is greater than the thickness of the flange portion 82 of handwheel 49, so as button 72A, 72B can relative to handwheel 49 radially-inwardly/outwards move.Under the effect of spring 86A, 86B bias voltage, outwards force button 72A, 72B, until interior lip 78A, 78B engage inward flange part 82.On the contrary, be applied to external pressure on outer surface 76A, 76B of button 72A, 72B (such as, hand via user) can spring-biased be overcome, thus radially-inwardly movement buttons 72A, 72B, until outer lip 80A, 80B engage inward flange part 82.
With reference to Fig. 6, interior lip 78A, 78B can comprise multiple hook tooth 92, and described hook tooth 92 is configured to the multiple hook tooth 94 of correspondence engaged when pressed together in the inward flange part 82 of handwheel 49.Figure 6 illustrates the structure of this " being pressed together ", and by spring 86A, 86B, the outside against of lip 78A, 78B in button 72A, 72B is produced this structure in inward flange part 82.In such configuration, the interlocking of the inward flange part 82 of interior lip 78A, 78B and handwheel 49 prevents handwheel 49 to rotate.
Therefore, utilize this structure, can it is realized that, if during cylinder valve 22 is in an open position (namely, allow gas to flow to face shield from cylinder), then only make handwheel 49 collide or the object that scratches can not cause shifter cylinder valve 22, this is because ratchet engage by fixing for valve in the open position.
In order to make it possible to operation handwheel 49(such as, shifter cylinder valve 22), the external pressure of hand is only applied on outer surface 76A, 76B of button 72A, 72B by user, to overcome the bias voltage of spring 86A, 86B.This causes button 72A, 72B radially-inwardly to move, until the hook tooth 92 of interior lip 78A, 78B departs from the hook tooth 94 of flange portion 82.Once ratchet departs from mutually, then can rotation hand wheel 49 with shutoff valve.
Should be understood that, although description above relates to a kind of arrangement preventing the hook tooth of shifter cylinder valve unintentionally, disclosed ratchet arrangement can also be used for preventing from being not intended to open cylinder valve.In addition, although disclosed handwheel arrangement is described as the embodiment of button 72A, the 72B comprising a pair, should be understood that and more or less button can be set.Therefore, in one embodiment, single button can be set.
Disclosed hook tooth 92,94 can comprise in multiple ratchet design any one.Such as, hook tooth 92,94 can be configured so that can relative motion along first direction, but prevents along second direction relative motion.Alternately, hook tooth 92,94 can be configured to prevent along the first and second direction relative motions.
In certain embodiments, only, lip 78A, 78B can comprise hook tooth, and the inward flange part 82 of handwheel 49 can comprise depressed part or other receiving surface to engage the hook tooth of interior lip.Alternately, only inward flange part can comprise hook tooth, and interior lip can comprise depressed part or other receiving surface to engage the hook tooth of inward flange part.
Arrange thus, ratchet-button that disclosed handwheel design is opened by use pair of locking valve prevents from cutting out the valve opened unintentionally.In this way, being not intended to grasp handwheel will cause valve to be closed as can be occurred when traditional design.In order to shutoff valve, user grasps handwheel, and is pushed into right ratchet-button.Pressing button makes ratchet button depart from the handle ratchet wheel locking piece be associated in handwheel, thus handwheel can be rotated.When discharging ratchet button, ratchet button engages the handle ratchet wheel locking piece in handwheel again, thus prevents handwheel from moving further.
According to aforementioned information, those of skill in the art are understandable, and the present invention is practical and have wide range of applications.Under the prerequisite not deviating from essence of the present invention or scope, from its aforementioned description of the present invention, of the present invention except those in these various embodiments described especially and restructuring program and various deformation scheme, modification and equivalent arrangements scheme by apparent and also can reasonably be proposed described of the present invention except those are in these various embodiments described especially and restructuring program and various deformation scheme, modification and equivalent arrangements scheme by described the present invention and its aforementioned description.Therefore, although describe the present invention at this in detail for its preferred embodiment, should be understood that the disclosure is only used to explain the present invention and is example of the present invention and is only used to comprehensively and disclose object of the present invention.Aforementioned disclosing is not intended to be interpreted as restriction the present invention or get rid of other embodiment, reorganization scheme, deformation program, modification or equivalent arrangements scheme; Only limit the present invention by claim of enclosing with its equivalent.Although apply concrete term at this, only unrestricted with regard to generic and describing significance use.
Claims (20)
1. a cylinder valve handwheel, it comprises:
Handwheel part, described handwheel part is used for being connected to valve rod;
Button, described button is arranged in handwheel part at least partly, button has interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip, one of them in the interior lip of button and inward flange part has ratchet component, and another in interior lip and inward flange part has the receiving surface for engages ratchet component; With
Spring, described layout of spring between button and handwheel part, for relative to handwheel part radially outward biases button;
Wherein, handwheel has primary importance, and in primary importance, ratchet component and receiving surface are biased into and are bonded with each other by spring, to prevent handwheel part from rotating; With
Wherein, handwheel has the second place, and in the second position, button radially-inwardly moves relative to handwheel part, to overcome the bias voltage of spring and to make ratchet component and receiving surface depart from, thus handwheel part can be rotated.
2. cylinder valve handwheel according to claim 1, button comprises the first button and the second button, and described first button and the second button arrangement are on the relative side surface of handwheel part.
3. cylinder valve handwheel according to claim 1, wherein, interior lip comprises ratchet component, and inward flange part comprises receiving surface.
4. cylinder valve handwheel according to claim 1, wherein, ratchet component and receiving surface prevent along first direction relative motion between interior lip and inward flange, and allow between lip and inward flange along second direction relative motion.
5. cylinder valve handwheel according to claim 1, wherein, ratchet component and receiving surface prevent from rotating along contrary first direction is relative with second direction between interior lip and inward flange.
6. cylinder valve handwheel according to claim 1, wherein, spring comprises disc spring, and described disc spring is received in the depressed part in button.
7. cylinder valve handwheel according to claim 1, handwheel part has user's grip surface, and button has grip surface, and wherein, when handwheel is in primary importance, user's grip surface of button is positioned to user's grip surface of adjoining handwheel part.
8. a cylinder valve handwheel, it comprises:
Handwheel part, described handwheel part is used for being connected to valve rod;
Button, described button is arranged in handwheel part at least in part, button has interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip, the interior lip of button has hook tooth, and inward flange part has the hook tooth for engaging with the hook tooth of button; With
Spring, described layout of spring between button and handwheel part, for relative to handwheel part radially outward biases button;
Wherein, handwheel has primary importance, and in primary importance, the hook tooth of button is biased into and engages with the hook tooth of inward flange part by spring, to prevent handwheel part from rotating; With
Wherein, handwheel has the second place, and in the second position, button radially-inwardly moves relative to handwheel part, to overcome the bias voltage of spring and to make the hook tooth of button and the hook tooth of inward flange part depart from, thus allows handwheel part to rotate.
9. cylinder valve handwheel according to claim 8, button comprises the first button and the second button, and described first button and the second button are arranged in handwheel part with relation diametrically.
10. cylinder valve handwheel according to claim 8, wherein, hook tooth and the hook tooth of inward flange part of interior lip prevent interior lip and the relative rotation of inward flange part along first direction, and lip and the relative rotation of inward flange part along second direction in allowing.
11. cylinder valve handwheels according to claim 8, wherein, hook tooth and the hook tooth of inward flange part of interior lip prevent interior lip from rotating along contrary first direction is relative with second direction with inward flange part.
12. cylinder valve handwheels according to claim 8, wherein, spring comprises disc spring, and described disc spring is received in the depressed part in button.
13. cylinder valve handwheels according to claim 8, handwheel part has user's grip surface, and button has user's grip surface, wherein, when handwheel is in primary importance, user's grip surface of button is positioned to user's grip surface of adjoining handwheel part.
14. cylinder valve handwheels according to claim 13, user's grip surface of button and user's grip surface of handwheel part have protruding features part, to contribute to user grasping user's grip surface easily.
15. 1 kinds of cylinder valve handwheels, it comprises:
Handwheel part, described handwheel part is used for being connected to valve rod;
First button and the second button, described first button and the second button are arranged in handwheel part at least in part, and the first button and the second button all have interior lip in the opposite side portion of the inward flange part being arranged in handwheel part and outer lip; With
First spring and the second spring, described first spring and the second layout of spring in the first button and the second button between corresponding one and handwheel part, for relative to handwheel part radially outward bias voltage first button and the second button;
Wherein, the first button all can be connected via ratchet with the interior lip of each in the second button and engages with inward flange part;
Wherein, handwheel part has primary importance, and in primary importance, the first button and the second button are biased into and engage with inward flange part by the first spring and the second spring, to prevent handwheel part from rotating; With
Wherein, handwheel part has the second place, in the second position, first button and the second button radially-inwardly move relative to handwheel part, with the bias voltage overcoming the first spring and the second spring and the ratchet dockingundocking making between interior lip and inward flange part, thus handwheel part is allowed to rotate.
16. cylinder valve handwheels according to claim 15, wherein, the interior lip of each in the first button and the second button includes ratchet component, and inward flange part comprises receiving surface.
17. cylinder valve handwheels according to claim 15, wherein, ratchet component and receiving surface prevent the relative motion along first direction between the interior lip of each in the first button and the second button and inward flange part, and allow the relative motion along second direction between the interior lip of each in the first button and the second button and inward flange part.
18. cylinder valve handwheels according to claim 15, wherein, ratchet component and receiving surface prevent from rotating along contrary first direction is relative with second direction between the interior lip of each in the first button and the second button and inward flange part.
19. cylinder valve handwheels according to claim 15, wherein, the first spring and the second spring comprise disc spring, and described disc spring is received in the respective recesses portion in the first button and the second button.
20. cylinder valve handwheels according to claim 15, handwheel part has user's grip surface, and the first button and the second button all have user's grip surface, wherein, when handwheel is in primary importance, user's grip surface of the first button and user's grip surface of the second button are positioned to user's grip surface of adjoining handwheel part.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/000571 WO2012129736A1 (en) | 2011-04-01 | 2011-04-01 | Improved valve hand-wheel for self contained breathing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103442769A CN103442769A (en) | 2013-12-11 |
| CN103442769B true CN103442769B (en) | 2015-12-09 |
Family
ID=46929294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180069722.7A Active CN103442769B (en) | 2011-04-01 | 2011-04-01 | For the valve hand wheel of the improvement of self-carrying breathing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103442769B (en) |
| WO (1) | WO2012129736A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11185723B2 (en) * | 2018-12-19 | 2021-11-30 | Msa Technology, Llc | Bypass knob for breathing apparatus pressure regulator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1547655A (en) * | 1975-11-18 | 1979-06-27 | Draegerwerk Ag | Closure valves of transportable containers for gas under pressure |
| US4498471A (en) * | 1982-09-28 | 1985-02-12 | U.S.D. Corp. | First and second stage regulator system for breathing gas |
| EP1327803A1 (en) * | 2002-01-11 | 2003-07-16 | Gce Sas | Valve for pressure bottle |
| CN201139881Y (en) * | 2007-12-28 | 2008-10-29 | 重庆华渝电气仪表总厂 | Pressure release valve for air respirator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3642489A1 (en) * | 1986-12-12 | 1988-06-23 | Hoechst Ag | Automatic closing mechanism for flaps in pipelines |
-
2011
- 2011-04-01 WO PCT/CN2011/000571 patent/WO2012129736A1/en active Application Filing
- 2011-04-01 CN CN201180069722.7A patent/CN103442769B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1547655A (en) * | 1975-11-18 | 1979-06-27 | Draegerwerk Ag | Closure valves of transportable containers for gas under pressure |
| US4498471A (en) * | 1982-09-28 | 1985-02-12 | U.S.D. Corp. | First and second stage regulator system for breathing gas |
| EP1327803A1 (en) * | 2002-01-11 | 2003-07-16 | Gce Sas | Valve for pressure bottle |
| CN201139881Y (en) * | 2007-12-28 | 2008-10-29 | 重庆华渝电气仪表总厂 | Pressure release valve for air respirator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012129736A1 (en) | 2012-10-04 |
| CN103442769A (en) | 2013-12-11 |
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