US3527242A - Three-phase mono-diaphragm breathing valve - Google Patents
Three-phase mono-diaphragm breathing valve Download PDFInfo
- Publication number
- US3527242A US3527242A US762221A US3527242DA US3527242A US 3527242 A US3527242 A US 3527242A US 762221 A US762221 A US 762221A US 3527242D A US3527242D A US 3527242DA US 3527242 A US3527242 A US 3527242A
- Authority
- US
- United States
- Prior art keywords
- diaphragm
- skirt
- valve seat
- exhaust
- breathing
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
-
- 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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/1402—Check valves with flexible valve members having an integral flexible member cooperating with a plurality of seating surfaces
-
- 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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
-
- 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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2544—Supply and exhaust type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2564—Plural inflows
- Y10T137/2572—One inflow supplements another
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7838—Plural
- Y10T137/7839—Dividing and recombining in a single flow path
- Y10T137/784—Integral resilient member forms plural valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7838—Plural
- Y10T137/7843—Integral resilient member forms plural valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
- Y10T137/7888—With valve member flexing about securement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
- Y10T137/7888—With valve member flexing about securement
- Y10T137/789—Central mount
Definitions
- a breathing valve for use in pressurized oxygen breathing systems at high altitudes including a single resiliently flexible disk-shaped diaphragm mounted in a stationary supporting structure, which diaphragm has a central mem ber containing an inlet port which collaborates with an inlet valve seat and a surrounding skirt which collaborates with an exhaust valve seat, the central member and the skirt being flexibly interconnected to permit the skirt and central member to move independently of one another, the diaphragm being flexibly responsive to the pressures developed during a normal breathing cycle so that the central member moves away from the inlet valve seat to permit the inflow of fluid Without disturbing the sealed relationship between the skirt and the exhaust valve seat, the skirt moves away from the exhaust valve seat responsive to the exhale of breathing fluid without disturbing the relationship between the central member and the inlet valve seat, and the skirt flexes so as to open exhaust vents which pass through the edge of the valve seat to permit ambient air to enter the valve in the event of
- This invention relates to breathing valves for use on breathing masks and especially those worn in aircraft at relatively high altitudes.
- the valve device of this invention finds particular utility in emergency use in pressurized aircraft cabins when the cabin pressure drops below normal breathing requirements.
- the occupant of the depressurized aircraft cabin quickly places the mask containing the breathing valve device of this invention over his face, and an immediate supply of breathing fluid is available to him.
- the valve device of this invention is adapted for use in a breathing mask and is provided with a rigid supporting structure which has an exhaust valve seat and an inlet valve which has an inlet valve seat.
- a resiliently flexible disk-shaped diaphragm is mounted in operative association with the supporting structure.
- the exhaust valve seat is provided with an annular edge at its inner diameter. Perforations or vents pass through the inner edge of the exhaust valve seat. These perforations or vents are sealed by the diaphragm skirt and open when the seal between the skirt and the exhaust seat is opened.
- the vents or perforations in the exhaust valve seat are so positioned that they are open when the exhaust seal is opened even though the skirt is still in contact with the annular edge of the valve seat.
- the demand side of the diaphragm faces the inside of the mask, and the supply side of the diaphragm faces away from the mask.
- a central inlet port in the diaphragm is sealed by the inlet valve seat.
- An annular central member surrounds and is concentric with the inlet port, and the central member is in turn surrounded by an annular skirt which is concentric with the central member.
- the skirt is adapted to engage and seal with the exhaust valve seat on the demand side of the diaphragm.
- the opposite side of the skirt is exposed to the ambient atmosphere.
- the central member and the skirt is each movable independently of the other into and out of sealing engagement with its respective valve seat.
- the diaphragm is caused to flex into and out of sealing engagement with the respective valve seats responsive to pressures within the breathing fluid supply system in which it is incorporated.
- a pressure on the supply side of the diaphragm which is greater than the pressure on the demand side causes the central member to move out of engagement with the inlet valve seat to permit the fiow of breathing fluid from the supply side to the demand side of the diaphragm. This condition occurs on the inhale portion of the normal breathing cycle.
- a pressure on the demand side of the diaphragm which is greater than that on the supply side causes the central member to move into sealing engagement with the inlet valve seat so as to prevent exhausted breathing fluid from passing from the demand side to the supply side of the diaphragm.
- FIG. 1 is a perspective view partially in cross section of the diaphragm
- FIG. 2 is a side elevation partially in cross section of the valve device of this invention
- FIG. 3 is a cross-sectional view of the device in normal operation taken along line 33 in FIG. 2;
- FIG. 4 is a partial cross-sectional view of the device in an emergency operation taken along line 4-4 in FIG. 3.
- a diaphragm 10 which is mounted in a three-phase monodiaphragm breathing valve indicated generally at 12 in operative association with housing 14 and annular shroud 16.
- Annular shroud 16 is retained in place in sealing relationship with mask 18 by spider 20.
- a supply hose 22 is releasably sealed to housing 14.
- Diaphragm 10 is retained in position between annular shroud 16 and housing 14 by diaphragm mounting member 24.
- Diaphragm mounting member 24 projects outwardly from and concentrically with skirt 46.
- Diaphragm 10 is in the form of a resiliently flexible disk which is provided with a supply side 26 and a demand side 28.
- supply hose 22 provides an inlet passage 30 through which fluid flows to inlet throat 32.
- Inlet valve seat 34 on inlet valve 36 co-operates with the supply side 26 of an annular central member 38 to provide a fluid tight seal.
- Inlet valve support member 37 retains valve 36 in fixed position in throat 32.
- Inlet port 40 in diaphragm permits the passage of fluid from the supply side 26 to the demand side 28 of diaphragm 10 when central member 38 is out of sealing engagement with inlet valve seat 34. This flow of fluid through inlet port 40 is indicated by a phantom arrow 42 in FIG. 3.
- a hollow bead or annular corrugation 44 forms a relatively thinner section which connects central member 38 with annular peripheral skirt 46.
- Cor rugation 44 is folded into the annular space between central member 38 and peripheral skirt 46 to permit one to move without disturbing the sealing relationship of the other with its respective valve seat.
- Peripheral skirt 46 is mounted in sealing engagement with exhaust valve seat 48 on annular shroud 16.
- the demand side 28 of skirt 46 forms a sealing line with valve seat 48 which also seals exhaust vent 50 and exhaust vent 54.
- Exhaust vents 50 and 54 pass through annular edge 52 of valve seat 48.
- Exhaust vent 50 is out completely through annular edge 52, whereas exhaust vent 54 is drilled through annular edge 52. Both exhaust vents 50 and 54 are sealed by skirt 46.
- the side of skirt 46 which is opposite from exhaust valve seat 48 is exposed to ambient atmosphere in exhaust collector chamber 56.
- Collector chamber 56 opens to the ambient atmosphere through exhaust port 58.
- skirt 46 The normal exhaust position of skirt 46 is shown in phantom in FIG. 3, and the normal direction of flow of exhausted breathing fluid is shown by phantom arrow 60 in FIG. 3.
- the emergency operation position of diaphragm 10 is shown in FIG. 4.
- the ambient pressure exceeds the pressure within the mask 18, and skirt 46 of diaphragm 10 flexes toward demand side 28 with skirt 46 pivoting or rotating about annular edge 52 so that ambient fluid flows through exhaust port 58 into collector chamber 56, as shown by phantom arrow 62 in FIG. 4, and through vents 50 and 54 onto the demand side 28 of diaphragm 10, as shown by phantom arrow 64 in FIG. 4.
- the outer periphery of skirt 46 is provided with a lip 65 which lends suflicient rigidity to skirt 46 to prevent its folding in an irregular pattern during use.
- the three-phase mono-diaphragm breathing valve 12 is assembled by positioning diaphragm mounting member 24 on boss 66 of housing 14.
- the annular shroud 16 is passed through a 'hole in mask 18 and is positioned adjacent spider 20 as shown in FIG. 3.
- the housing 14, carrying diaphragm 10. is then positioned adjacent to annular shroud .16; and housing 14, shroud 16, and spider 20 are secured together in sealing relationship with mask 18 by means of fastener 68.
- Supply hose 22 is then positioned in fluid tight relationship with flange 70 on housing 14.
- the diaphragm 10 moves responsive to the pressure generated by the normal breathing cycle of the wearer of mask 18.
- the pressure on the supply side 26 of diaphragm 10 is greater than the pressure of the demand side 28 of diaphragm 10 so that central member 38 moves axially away from the inlet valve seat 34.
- Corrugation 44 flexes to permit the axial movement of central member 38 without disturbing the sealing relationship between skirt 46 and exhaust valve seat 48.
- the skirt 46 of diaphragm 10 deflects downwardly away from exhaust valve seat 48 responsive to the normal breathing pressure on the demand side of diaphragm 10. This pressure is in excess of the ambient pressure which prevails in exhaust collector chamber 56 and to which the opposite side of the skirt 46 is exposed.
- the exhausted breathing fluid passes out through exhaust vents 50 and 54, which are disposed around the periphery of exhaust valve seat 48, past the downwardly deflected skirt 46, into exhaust collector chamber 56, and out through exhaust port 58.
- skirt 46 rotates or pivots about edge 52 breaking the seal be tween skirt 46 and exhaust valve seat 48 so as to open exhaust vents 50 and 54.
- ambient breathing fluid is drawn in through exhaust port 58 into exhaust collector chamber 56 and through vents 50 and 54 into the interior of mask 18 where it is inhaled by the wearer of mask 18.
- the exhale portion of the emergency operation of this three-phase mono-diaphragm breathing valve 12 is the same as that during normal operation as described in more detail above.
- the diaphragm 10 is composed of a flexible material which, because of its inherent resiliency, will return to its generally disc-shaped configuration when relieved from pressure.
- Diaphragm 10 is composed of an elastomeric material which retains its characteristics over a wide range of temperatures, such as those encountered at high altitides in aircraft cabins. Suitable elastomeric materials include; for example, neoprene rubber, polyurethane elastomers, and silicone rubber.
- breathing valve 12 The only moving part in breathing valve 12 is the diaphragm itself.
- the breathing valve 12 is simple and easy to maintain and is compact and lightweight.
- a valve device comprising:
- a rigid supporting structure having an exhaust valve seat and an inlet valve seat, said exhaust valve seating having an edge and an exhaust vent through said edge;
- a resilient diaphragm having a supply side and a demand side, said diaphragm being retained in operative association with said valve seats, said diaphragm comprising a central member engageable with said inlet valve seat on the supply side of said diaphragm, said central member having an inlet port therein sealable by engagement of said central member and said inlet valve seat, said diaphragm having a skirt spaced outwardly from said central member, one side of said skirt being engageable with said exhaust valve seat on the demand side of said diaphragm, and the other side of said skirt being opened to ambient pressure, said central member and said skirt each being capable of flexing independently of the other, said central member being responsive to a positive supply pressure differential across said diaphragm to disengage from said inlet valve seat to open said inlet port, said skirt being responsive to a positive demand pressure differential across said diaphragm to flex out of sealing engagement with said exhaust valve seat, said diaphragm also being responsive to a positive ambient pressure differential across said skirt
- a valve device comprising:
- a rigid supporting structure having an annular exhaust valve seat and an annular inlet valve seat, said exhaust valve seat having an annular edge at its inner periphery and an exhaust vent through such edge;
- said diaphragm having a supply side and a demand side mounted in operative association with said rigid support structure, said diaphragm comprising an elastic disc having a central inlet port scalable by said inlet valve seat, an annular central member surrounding and concentric with said inlet port, the supply side of said central member being sealably engageable with said inlet valve seat, an annular skirt surrounding and concentric with said central member, one side of said skirt being sealably engageable with said exhaust valve seat on the demand side of said diaphragm and the other side of said skirt being open to ambient pressure, said central member and said skirt each being capable of flexing independently of the other, said central member being adapted to flex out of sealing engagement With said inlet valve seat responsive to a positive supply pressure differential on the supply side of said diaphragm, said skirt being adapted to flex out of sealing engagement with said exhaust valve seat responsive to a positive demand pressure differential on the demand side of said diaphragm, and said skirt also being adapted to flex and rotate about said annular edge to open said
- valve device of claim 2 wherein said diaphragm includes an annular connecting section joining said central member with said skirt, said connecting section being of relatively greater flexibility than said mem ber and said skirt.
- valve device of claim 2 including a plurality of exhaust vents spaced around the said annular edge.
- said diaphragm includes an annular connecting section connecting said central member and said skirt, said connecting section having a breadth greater than the breadth of the space between said skirt and said central member, said connecting section being folded in said space.
- valve device of claim 2 including an annular corrugation relatively thinner than the remainder of said diaphragm connected respectively to the outer perimeter of said central member and the inner perimeter of said skirt, and said diaphragm being adapted to flex at said corrugation.
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76222168A | 1968-09-16 | 1968-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3527242A true US3527242A (en) | 1970-09-08 |
Family
ID=25064436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US762221A Expired - Lifetime US3527242A (en) | 1968-09-16 | 1968-09-16 | Three-phase mono-diaphragm breathing valve |
Country Status (1)
Country | Link |
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US (1) | US3527242A (en) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680555A (en) * | 1969-03-20 | 1972-08-01 | Draegerwerk Ag | Protective mask with annular flushing chamber |
US3730217A (en) * | 1971-05-19 | 1973-05-01 | Gen Motors Corp | Check valve |
US3807444A (en) * | 1972-10-10 | 1974-04-30 | Ca Valve Ltd | Check valve |
US4149556A (en) * | 1978-09-26 | 1979-04-17 | Respiratory Care, Inc. | Tubular connector having audible relief valve |
US4259951A (en) * | 1979-07-30 | 1981-04-07 | Chesebrough-Pond's Inc. | Dual valve for respiratory device |
US4420101A (en) * | 1981-11-18 | 1983-12-13 | Diamond International Corp. | Squeeze bottle with self-venting dispensing closure |
US4564130A (en) * | 1982-06-29 | 1986-01-14 | Josef Wischerath Gmbh & Co., Kg | Dispenser for paste-like products |
US5002050A (en) * | 1986-09-17 | 1991-03-26 | Mcginnis Gerald E | Medical gas flow control valve, system and method |
GB2269323A (en) * | 1992-08-07 | 1994-02-09 | Sabre Safety Ltd | A valve for use with breathing apparatus and breathing apparatus incorporating the valve |
US5355875A (en) * | 1992-10-06 | 1994-10-18 | Vinatronics Division | Protective garment using one-way valves |
US5385140A (en) * | 1991-05-14 | 1995-01-31 | Lindrew Pty Limited | Aerosol inhalation device |
US5392769A (en) * | 1992-10-06 | 1995-02-28 | Vinatroics Division | One-way valve |
US5443569A (en) * | 1993-03-05 | 1995-08-22 | Daiwa Can Company | Foam dispensing pump container |
US6039042A (en) * | 1998-02-23 | 2000-03-21 | Thayer Medical Corporation | Portable chamber for metered dose inhaler dispensers |
US6164269A (en) * | 1997-10-31 | 2000-12-26 | Caterpillar Inc. | Exhaust gas recirculation valve assembly having an integrated check valve |
US6202643B1 (en) | 1998-02-23 | 2001-03-20 | Thayer Medical Corporation | Collapsible, disposable MDI spacer and method |
US20050072475A1 (en) * | 2003-10-03 | 2005-04-07 | Seo Kwang Soo | Precision valve for a garment vacuum bag |
US20060266363A1 (en) * | 2005-05-31 | 2006-11-30 | Drager Safety Ag & Co. Kgaa | Breathing mask |
US20090250060A1 (en) * | 2005-11-09 | 2009-10-08 | Respan Products, Inc. | Disposable mask assembly with exhaust filter and valve disc and method of assembling same |
US20130276784A1 (en) * | 2008-04-16 | 2013-10-24 | Stephen Donald Flynn, SR. | Multipurpose therapeutic face mask |
US20160256661A1 (en) * | 2013-10-15 | 2016-09-08 | Wallis Coombe Pty Ltd As Trustee For Sleuky Family Trust | Improved oxygenating apparatus |
US9962723B2 (en) | 2012-12-20 | 2018-05-08 | Rieke Corporation | Foam dispenser with reversible valve |
US20220143431A1 (en) * | 2019-03-12 | 2022-05-12 | Myung Jin Lee | Personal air purifier |
US11660417B2 (en) | 2017-11-17 | 2023-05-30 | Drägerwerk AG & Co. KGaA | Nonreturn valve for a compact ventilation system as well as compact ventilation system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2033467A (en) * | 1935-06-07 | 1936-03-10 | Pierce John B Foundation | Air valve-vacuum breaker |
US2947313A (en) * | 1956-04-17 | 1960-08-02 | Eric H Taylor | Two-way valve |
US3083707A (en) * | 1956-02-13 | 1963-04-02 | Henry W Seeler | Device for treatment of pulmonary diseases |
DE1187441B (en) * | 1960-09-09 | 1965-02-18 | Siemens Ag | Automatic quick exhaust device for compressed air drives, especially for compressed air operated switchgear |
US3365100A (en) * | 1965-10-24 | 1968-01-23 | Continental Can Co | Article dispenser package with separate suspension means |
-
1968
- 1968-09-16 US US762221A patent/US3527242A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2033467A (en) * | 1935-06-07 | 1936-03-10 | Pierce John B Foundation | Air valve-vacuum breaker |
US3083707A (en) * | 1956-02-13 | 1963-04-02 | Henry W Seeler | Device for treatment of pulmonary diseases |
US2947313A (en) * | 1956-04-17 | 1960-08-02 | Eric H Taylor | Two-way valve |
DE1187441B (en) * | 1960-09-09 | 1965-02-18 | Siemens Ag | Automatic quick exhaust device for compressed air drives, especially for compressed air operated switchgear |
US3365100A (en) * | 1965-10-24 | 1968-01-23 | Continental Can Co | Article dispenser package with separate suspension means |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680555A (en) * | 1969-03-20 | 1972-08-01 | Draegerwerk Ag | Protective mask with annular flushing chamber |
US3730217A (en) * | 1971-05-19 | 1973-05-01 | Gen Motors Corp | Check valve |
US3807444A (en) * | 1972-10-10 | 1974-04-30 | Ca Valve Ltd | Check valve |
US4149556A (en) * | 1978-09-26 | 1979-04-17 | Respiratory Care, Inc. | Tubular connector having audible relief valve |
US4259951A (en) * | 1979-07-30 | 1981-04-07 | Chesebrough-Pond's Inc. | Dual valve for respiratory device |
US4420101A (en) * | 1981-11-18 | 1983-12-13 | Diamond International Corp. | Squeeze bottle with self-venting dispensing closure |
US4564130A (en) * | 1982-06-29 | 1986-01-14 | Josef Wischerath Gmbh & Co., Kg | Dispenser for paste-like products |
US5002050A (en) * | 1986-09-17 | 1991-03-26 | Mcginnis Gerald E | Medical gas flow control valve, system and method |
US5385140A (en) * | 1991-05-14 | 1995-01-31 | Lindrew Pty Limited | Aerosol inhalation device |
GB2269323A (en) * | 1992-08-07 | 1994-02-09 | Sabre Safety Ltd | A valve for use with breathing apparatus and breathing apparatus incorporating the valve |
US5355875A (en) * | 1992-10-06 | 1994-10-18 | Vinatronics Division | Protective garment using one-way valves |
US5392769A (en) * | 1992-10-06 | 1995-02-28 | Vinatroics Division | One-way valve |
US5443569A (en) * | 1993-03-05 | 1995-08-22 | Daiwa Can Company | Foam dispensing pump container |
US6164269A (en) * | 1997-10-31 | 2000-12-26 | Caterpillar Inc. | Exhaust gas recirculation valve assembly having an integrated check valve |
US6039042A (en) * | 1998-02-23 | 2000-03-21 | Thayer Medical Corporation | Portable chamber for metered dose inhaler dispensers |
US6202643B1 (en) | 1998-02-23 | 2001-03-20 | Thayer Medical Corporation | Collapsible, disposable MDI spacer and method |
US20050072475A1 (en) * | 2003-10-03 | 2005-04-07 | Seo Kwang Soo | Precision valve for a garment vacuum bag |
US7770581B2 (en) * | 2005-05-31 | 2010-08-10 | Dräger Safety AG & Co. KGaA | Breathing mask |
US20060266363A1 (en) * | 2005-05-31 | 2006-11-30 | Drager Safety Ag & Co. Kgaa | Breathing mask |
US20090250060A1 (en) * | 2005-11-09 | 2009-10-08 | Respan Products, Inc. | Disposable mask assembly with exhaust filter and valve disc and method of assembling same |
US8342179B2 (en) * | 2005-11-09 | 2013-01-01 | Respan Products, Inc. | Disposable mask assembly with exhaust filter and valve disc and method of assembling same |
US20130276784A1 (en) * | 2008-04-16 | 2013-10-24 | Stephen Donald Flynn, SR. | Multipurpose therapeutic face mask |
US9126004B2 (en) * | 2008-04-16 | 2015-09-08 | Stephen Donald Flynn, SR. | Multipurpose therapeutic face mask |
US9962723B2 (en) | 2012-12-20 | 2018-05-08 | Rieke Corporation | Foam dispenser with reversible valve |
US20160256661A1 (en) * | 2013-10-15 | 2016-09-08 | Wallis Coombe Pty Ltd As Trustee For Sleuky Family Trust | Improved oxygenating apparatus |
US11660417B2 (en) | 2017-11-17 | 2023-05-30 | Drägerwerk AG & Co. KGaA | Nonreturn valve for a compact ventilation system as well as compact ventilation system |
US20220143431A1 (en) * | 2019-03-12 | 2022-05-12 | Myung Jin Lee | Personal air purifier |
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