US3362420A - Anti-suffocation valve - Google Patents

Anti-suffocation valve Download PDF

Info

Publication number
US3362420A
US3362420A US47902165A US3362420A US 3362420 A US3362420 A US 3362420A US 47902165 A US47902165 A US 47902165A US 3362420 A US3362420 A US 3362420A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
valve
oxygen
solenoid
bellows
wall
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
Application number
Inventor
Charles M Blackburn
Richard S Brashears
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Secretary of Navy
Original Assignee
Navy Usa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00Component parts for respiratory or breathing apparatus
    • A62B9/02Valves
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/1842Ambient condition change responsive
    • Y10T137/1939Atmospheric
    • Y10T137/2012Pressure
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7781With separate connected fluid reactor surface
    • Y10T137/7782With manual or external control for line valve

Description

Jan. 9, 1968 C. M. 4BLACKBURN ETAL ANTI-SUFFOCATION VALVE Filed Aug. ll, 1965 man n www N Y NG n r. E A 0. N VMM J m@ AWA MSV.. $0 R RH P HR a n m mw vm mw E d r .n Jw/ hv um um mm Q 2l mm n. vm .5.. mm *I 1 mm l. E Nol om .mwll ||||w| E K g 2, mw \V\` n \N il. w .3. bv Q V mm Vi m uw 7 /mr mw G mm ,I Km mw mm No mw United States Patent O 3,362,420 ANTI-SUFF CATION VALVE Charles M. Blackburn and Richard S. Brasllears, Silver Spring, Md., assignors to the United States of America as represented by the Secretary of the Navy Filed Aug. 11, 1965, Ser. No. 479,021 Claims. (Cl. 137-81) ABSTRACT OF THE DISCLOSURE There is disclosed a safety valve for automatically venting an oxygen mask to the atmosphere in the event that the oxygen supply becomes depleted while the wearer is unconscious and further provides that the valve will not automatically vent to the atmosphere if the wearer is above a predetermined altitude or submerged in water.

The present invention relates to an anti-suffocation valve and, more particularly, to a valve for an oxygen mask which prevents suffocation when the wearer is unconscious.

It is the continuous desire of developers of oxygen masks, flight helmets, and other similar life supporting equipment to make them safer for those who use them. However, the equipment that is available today does not have a safety feature that enables the artificial respiration system to be vented automatically to the atmosphere in the event that the system becomes depleted of oxygen when the wearer is unconscious. Such a safety feature would be desirable in the event that the oxygen supply was depleted yet the wearers altitude was such that adequate respiration could be maintained by the ambient at- Inosphere. Of course, if the wearer is conscious, he would merely remove the mask or helmet. The problem arises, however, when the wearer is unable to do so, for example, when he is unconscious. It is, therefore, desirable to provide a device for automatically venting the respiration system to the atmosphere when the oxygen supply falls below a predetermined level. Of course, if the ambient atmosphere is not capable of supporting adequate respiration, the system should not be vented thereto. This would occur, for example, when the wearer is either above a predetermined altitude or momentarily submerged in water.

It is, therefore, an object of the present invention to provide an anti-suffocation valve for automatically venting an artificial respiration system to atmosphere should it become depleted of oxygen.

Another object is to provide an automatically venting valve which is prevented from venting to the atmosphere when in use above a predetermined altitude.

Still another object of the present invention is to provide a valve which is prevented from venting to the atmosphere when submerged in water.

A further object of the invention is the provision of an automatically venting valve which is characterized by simplicity of construction, reliability, low cost and ease of installation.

Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings in which:

FIG. l is a side elevation view, partly in section, of a preferred embodiment of the invention;

FIG. 2 is a side elevation view of a breathing mask incorporating the instant invention; and

FIG. 3 is a schematic View, partially in elevation, of a portion of the invention.

Referring now to the drawings wherein like reference characters designate like or corresponding parts throughout the several views, there is shown in FIG. 1 a generally cylindrical housing 5 having a longitudinally flattened portion 6 and a flange 7 to facilitate mounting the housing 5 to the interior of a breathing mask or helmet 8 used in an artificial respiration system. The housing 5 is provided with a chamber 9 which is closed at one end by an integral end wall 11. At its opposite end, the housing -5 is threaded internally to receive a solenoid mounting plate 13 having a solenoid 15 attached thereto as by a screw 17.

A valve element 19, mounted in the chamber 9, has an internally threaded base 20 that threadedly engages a reduced threaded boss 21 extending axially from the inner end of the solenoid 15. The valve element 19 has a tubular central wall 22 extending from the base 20 and terminating in an outwardly directed flange 23. Mounted within an annular groove 24 on the outer surface of the flange 23 is a sealing ring 25 for sealing the annular space between the valve element 19 and the housing 5. The inner wall of the valve element 19 is flared outwardly toward its inner end to define a Valve seat 26 while the tubular central wall 22 of the valve element 19 is provided with a pair of ports 27. The housing 5 is also providedV with a pair of ports 29 and 31, Iport 29 opening to the ambient atmosphere and port 31 opening into the interior of the helmet 8. In a manner to be explained, the ports 29 and 31 may be selectively placed in communication with each other to enable the ambient atmosphere to enter the interior of the helmet when the artificial oxygen supply becomes depleted.

The solenoid 15 actuates a plunger 33 attached by a screw 35 to a disc shaped valve member 36 which is movable into engagement with the valve seat 26 lby the movement of the plunger 33. The disc shaped valve member 36 includes a toroidal sealing element 37 which abuts the valve seat 26 when the valve is closed. A retaining ring 38 is clamped between the inner end wall of the plunger 33 and the sealing element 37, thereby securing the element 37 against the valve member 36. The valve member 36 is urged toward an open position by a spring 39 which is coaxially mounted around the solenoid plunger 33 and is confined between the inner surface of the Ebase 20 of the valve element 19 and the confronting face of the sealing element 37.

Abutting the valve member 36 is a bi-chambered bellows 41 disposed between the valve member 36 and the end wall 11 of the housing. The bi-chambered bellows 41 is divided into two adjoining bellows 43 and 4S by a common wall 46 while each is closed at its outer end by the end walls 47 and 48, respectively. The outer wall 47 abuts the valve member 36 and the bellows 43 is permanently lled with a gas, such as nitrogen, to form a pressure cha-mber. The outer wall 48 of the smaller bellows 45 is connected to a mounting plate 49 which is secured to the end Wall 11 by screw rneans 54. A tubular spacer 50 is attached to the inner surface of the outer wall 48, and extends axially through the bellows 45 towards the common wall 4-6.

A port 51 extends through the outer wall 48 and the mounting plate 4'9 to vent the spacer 5) and the interior of the bellows 45 to the passageway 53 in the end wall 11. A ring gasket S5 is contained in an annular groove 56 on the mounting plate `49 to seal the passageway 51 from the chamber 9. A second spacer 518 is axially mounted, as by welding, to the common wall 46 of the larger bellows 43, which spacer limits the collapsing motion of the larger bellows 43 by acting as a stop against the outer wall 47. In a similar manner, the tubular spacer 50 limits the collapsing motion of the smaller bellows 45'.

Referring now to FIG. 2, the interior of the breathing mask 8 is supplied with oxygen from an external so-urce 59 through a pressure regulator 60. The oxygen supply 59 is also directly connected by aline 61 to the passageway 53. In operation, the pressure of the -oxygen from the source 59 passes through the line 61, the passageway 53, and the tubular spacer 50 to the interior of the bellows 45. This pressure expands the smaller bellows 45, thereby moving the valve member 36 against its valve seat 26. This movement prevents communication between the atmosphere port 29 and the interior port 31 until the pressure of the oxygen source drops below a predetermined value, wherein the force exerted by the smaller bellows 45 is overcome by the spring 39 and the valve member 36 is opened. However, should the oxygen source become depleted when the altitude of the aircraft is such that the ambient atmosphere is insufficient to sustain adequate respiration, the larger bellows 43 would, notwithstanding the drop in oxygen pressure within the bellows 45, maintain the valve member 36 firmly seated against the valve seat 26, thereby preventing venting of the breathing mask 8.

As illustrated in FIGS. 1 and 2, the ambient atmosphere port 29 is surrounded by a pair of annular metallic rings 63 and 64 contained in the grooves `66 of an annular nonwetting gasket 65'.

As illustrated in FIG. 3, the outer ring 63 is connected in series with an energy source 62, such as a battery, and one of the terminals of the solenoid while the inner ring 64 is connected to the -other terminal of the solenoid 15. If the wearer of the mask 8 should be momentarily submerged under water and unconscious when the oxygen supply becomes depleted, he would be in grave `danger if the port 29 were opened. Therefore, in such a situation, the water will complete the series circuit by forming a conductive path between rings 63 and `64, thereby driving the plunger 33 into the solenoid to seat the valve member 36 and prevent water from entering the interior of the valve through ports 29 and 31. When the mask is removed from the water, the non-wetting properties of the gasket 65 will again open the series circuit and allow the interior of the valve to vent to atmosphere.

Obviously, many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

1. An anti-suffocation valve for use in an artificial respiration system having an oxygen supply comprising:

a tubular housing having a pair of axially spaced ports therein;

a solenoid having a plunger, said solenoid being secured to one end of said housing;

a valve element secured to said solenoid, said Valve element having a valve seat disposed between Said ports;

a valve member secured to said solenoid plunger, said valve member abutting said valve seat when said solenoid is energized to thereby close communication between said ports;

a spring concentrically mounted around said solenoid plunger for urging said valve member away from said valve seat;

a bellows having first and second chambers therein, said first chamber being secured to the other end of said housing and said second chamber abutting said valve member, said first chamber having an axially ydisposed tube therein extending throughout a substantial portion of the length of said chamber, said tube being in communication with a passageway through said housing which is adapted to be pressurized by said -oxygen supply, said second chamber having an axially disposed tube therein and being filled with a gas so as to define a pressure chamber; and

a pair of metallic .rings disposed around one of said ports, said rings being separated by a non-wetting gasket and being electrically connected to said solenoid for actuation thereof when said rings are submerged in water;

whereby said Valve member is normally held against said valve seat by the pressure of the oxygen in the first chamber of said bellows but will separate when said oxygen is depleted unless the altitude is such that the ambient atmosphere will not sustain adequate respiration or the rings are submerged in water.

2. An anti-suffocation valve comprising:

a housing having a pair of ports therein;

valve means adapted to open and close communication between said ports;

resilient means urging said valve means towards an open position;

first pressure means in communication with a respirant supply for maintaining said Valve closed when the pressure of said supply is above a .pre-determined value;

secon-d pressure means for maintaining said valve closed fwhen the ambient pressure is below a pre-determined value; and

means for maintaining said valve closed when submerged in Water.

3. An anti-suffocation valve, las set forth in claim 2,

wherein said first and second pressure means comprise:

a bi-chambered bellows, one end of which abuts said valve means and t-he other end of which is secured to the end wall of said housing.

4. An anti-suffocation valve, as set forth in claim 3, wherein said means for maintaining said valve closed when submerged in water comprises:

a solenoid having a plunger secured to said valve means; and

an electric circuit for operating said solenoid, said circuit including a normally open switch which is adapted to close when submerged in water.

5. An anti-suffocation valve, as set forth in claim 4,

wherein said normally open switch comprises:

a pair of metallic rings separated by an annular nonwetting gasket.

6. An anti-suffocation valve comprising:

a housing having a pair of ports therein;

valve means establishing communication between said ports when in :an open position;

first means in communication with a respirant supply for closing said valve when the pressure of said supply is above a predetermined value; and

second means responsive to water for maintaining said valve in a closed position when submerged in said water irrespective of the pressure of said supply.

7. An anti-suffocation valve, as set forth in claim 6,

comprising:

third means for maintaining said valve in a closed position when the ambient atmospheric pressure is below a predetermined value irrespective of the pressure of said supply.

8. An anti-s-uffocation valve, as set forth in claim 7,

wherein said first and third means comprises a bi-chambered bellows.

5 6 9. An anti-sniocation valve, as set forth in claim 6, References Cited wherein said second means comprises: UNITED STATES PATENTS a solenoid secured to said valve means; and a pair of metallic elements electrically connected to 2387123 10/1945 Demmg 12g-*1465 said solenoid for energizing s-arne when said elements 5 2822816 2/1958 Schutmaat 137-80 are submerged in Wan 2,853,268 9/1958 Hu-glles 137-505.22 X 10. An anti-suffocation valve, as set forth in claim 9, 3092104 6/1963 Cassldy 12S-142 wherein said elements comprise:

a pair of rings disposed around one of said ports, said WILLIAM F' O DEA Prmary Examme' rings being separated by -a non-wetting annular 10. R. GERARD Assistant Examiner. gasket.

US3362420A 1965-08-11 1965-08-11 Anti-suffocation valve Expired - Lifetime US3362420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3362420A US3362420A (en) 1965-08-11 1965-08-11 Anti-suffocation valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3362420A US3362420A (en) 1965-08-11 1965-08-11 Anti-suffocation valve

Publications (1)

Publication Number Publication Date
US3362420A true US3362420A (en) 1968-01-09

Family

ID=23902330

Family Applications (1)

Application Number Title Priority Date Filing Date
US3362420A Expired - Lifetime US3362420A (en) 1965-08-11 1965-08-11 Anti-suffocation valve

Country Status (1)

Country Link
US (1) US3362420A (en)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606340A (en) * 1983-07-14 1986-08-19 Figgie International Inc. Combined pressure compensating exhalation and anti-suffocation valve
US4823786A (en) * 1987-04-02 1989-04-25 Societe De Fabrication D'instruments De Mesure (S.F.I.M.) Breathing equipment for providing protection against drowning, in particular for the driver of a motorized water vessel
US5438981A (en) * 1993-09-30 1995-08-08 Respironics, Inc. Automatic safety valve and diffuser for nasal and/or oral gas delivery mask
US5647355A (en) * 1993-09-30 1997-07-15 Respironics, Inc. Automatic safety valve for respiratory equipment which is counter-balanced and self-adjusting
US6006748A (en) * 1996-10-16 1999-12-28 Resmed Limited Vent valve apparatus
US6029660A (en) * 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6044844A (en) * 1996-12-02 2000-04-04 Resmed Limited Mask and harness assembly
USD423096S (en) 1997-02-25 2000-04-18 Resmed Limited Nasal mask cushion
US6112746A (en) * 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US6119693A (en) * 1998-01-16 2000-09-19 Resmed Limited Forehead support for facial mask
US6123071A (en) * 1993-06-18 2000-09-26 Resmed Limited Facial masks for assisted respiration or CPAP
US6123082A (en) * 1996-12-18 2000-09-26 Resmed Limited Device for preventing or reducing the passage of air through the mouth
US6494207B1 (en) 1996-12-02 2002-12-17 Resmed Limited Harness assembly for a nasal mask
US20030019495A1 (en) * 2001-05-18 2003-01-30 Palkon David J. Mask cushion and method of using same
US6513526B2 (en) 1996-07-26 2003-02-04 Resmed Limited Full-face mask and mask cushion therefor
US20030034034A1 (en) * 1999-06-18 2003-02-20 Resmed Limited Forehead support for facial mask
US6561191B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
US6561190B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
US20030221691A1 (en) * 2000-10-19 2003-12-04 Achim Biener Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US20040045550A1 (en) * 2002-01-01 2004-03-11 Bernd Lang Breathing mask arrangement and a forehead support device for same
US20040182398A1 (en) * 2003-03-22 2004-09-23 Tom Sprinkle Nasal mask
USD498529S1 (en) 1996-07-26 2004-11-16 Resmed Limited Portion of a cushion for use with a mask assembly in the application of continuous positive airway pressure (CPAP)
US20050005940A1 (en) * 2003-04-10 2005-01-13 Resmed Limited Mask with integral cushion and forehead piece
US20050022820A1 (en) * 2003-05-05 2005-02-03 Kwok Philip R. Forehead support for facial mask
US20050139219A1 (en) * 1999-03-29 2005-06-30 Resmed Limited Forehead support for facial mask
US20050241644A1 (en) * 2004-04-09 2005-11-03 Resmed Limited Nasal assembly
US20060191538A1 (en) * 2001-10-22 2006-08-31 Map Medizin-Technologie Gmbh Application device for breathing mask arrangement
US20060196509A1 (en) * 2000-05-15 2006-09-07 Resmed Limited Respiratory mask having gas washout vent & gas washout vent assembly for a respiratory mask
US7290546B2 (en) 2002-03-22 2007-11-06 Invacare Corporation Nasal mask
US7320323B2 (en) 2001-10-22 2008-01-22 Map Medizin-Technologie Gmbh Breathing mask device and application device and frontal support device thereof
US20080066761A1 (en) * 2006-09-18 2008-03-20 Invacare Corporation Breathing mask
US20080257354A1 (en) * 2007-04-19 2008-10-23 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
US20090260628A1 (en) * 2008-04-16 2009-10-22 Flynn Sr Stephen Donald Multipurpose therapeutic face mask
US20110056498A1 (en) * 2001-09-07 2011-03-10 Resmed Limited Forehead pad for respiratory mask
US8353294B2 (en) 2004-06-16 2013-01-15 Resmed Limited Respiratory mask assembly
US8485192B2 (en) 2005-01-12 2013-07-16 Resmed Limited Cushion for patient interface
US8505535B2 (en) 2003-05-02 2013-08-13 Resmed Limited Mask system
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
US8522785B2 (en) 2002-08-05 2013-09-03 Resmed Limited Inextensible headgear and CPAP or ventilator mask assembly with the same
US8522784B2 (en) 2008-03-04 2013-09-03 Resmed Limited Mask system
US8944061B2 (en) 2005-10-14 2015-02-03 Resmed Limited Cushion to frame assembly mechanism
US9381316B2 (en) 2005-10-25 2016-07-05 Resmed Limited Interchangeable mask assembly
US9802021B2 (en) 2002-12-06 2017-10-31 Fisher & Paykel Healthcare Limited Mouthpiece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2387123A (en) * 1941-04-03 1945-10-16 Air Reduction Breathing apparatus
US2822816A (en) * 1954-01-22 1958-02-11 Penn Controls Automatic shut-off
US2853268A (en) * 1954-03-25 1958-09-23 Reynolds Gas Regulator Company Pressure regulator
US3092104A (en) * 1958-04-21 1963-06-04 Ling Temco Vought Inc Safety apparatus for oxygen system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2387123A (en) * 1941-04-03 1945-10-16 Air Reduction Breathing apparatus
US2822816A (en) * 1954-01-22 1958-02-11 Penn Controls Automatic shut-off
US2853268A (en) * 1954-03-25 1958-09-23 Reynolds Gas Regulator Company Pressure regulator
US3092104A (en) * 1958-04-21 1963-06-04 Ling Temco Vought Inc Safety apparatus for oxygen system

Cited By (167)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606340A (en) * 1983-07-14 1986-08-19 Figgie International Inc. Combined pressure compensating exhalation and anti-suffocation valve
US4823786A (en) * 1987-04-02 1989-04-25 Societe De Fabrication D'instruments De Mesure (S.F.I.M.) Breathing equipment for providing protection against drowning, in particular for the driver of a motorized water vessel
US6123071A (en) * 1993-06-18 2000-09-26 Resmed Limited Facial masks for assisted respiration or CPAP
US5438981A (en) * 1993-09-30 1995-08-08 Respironics, Inc. Automatic safety valve and diffuser for nasal and/or oral gas delivery mask
US5647355A (en) * 1993-09-30 1997-07-15 Respironics, Inc. Automatic safety valve for respiratory equipment which is counter-balanced and self-adjusting
US20070107735A1 (en) * 1996-07-26 2007-05-17 Resmed Limited Mask
US7069933B2 (en) 1996-07-26 2006-07-04 Resmed Limited Breathing mask and mask cushion therefor
US8522783B2 (en) 1996-07-26 2013-09-03 Resmed Limited Cushion and mask therefor
US8056561B2 (en) 1996-07-26 2011-11-15 Resmed Limited Full-face mask and mask cushion therefor
US6112746A (en) * 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US8636006B2 (en) 1996-07-26 2014-01-28 Resmed Limited Mask
USD498529S1 (en) 1996-07-26 2004-11-16 Resmed Limited Portion of a cushion for use with a mask assembly in the application of continuous positive airway pressure (CPAP)
US6634358B2 (en) 1996-07-26 2003-10-21 Resmed Limited Nasal mask cushion assembly
US7950392B2 (en) 1996-07-26 2011-05-31 Resmed Limited Cushion and mask therefor
US6357441B1 (en) 1996-07-26 2002-03-19 Resmed Limited Nasal mask and mask cushion therefor
US8813748B2 (en) 1996-07-26 2014-08-26 Resmed Limited Full-face mask and mask cushion therefor
US20040094159A1 (en) * 1996-07-26 2004-05-20 Resmed Limited Breathing mask and mask cushion therefor
US7178527B2 (en) 1996-07-26 2007-02-20 Resmed Limited Nasal mask and mask cushion therefor
US6513526B2 (en) 1996-07-26 2003-02-04 Resmed Limited Full-face mask and mask cushion therefor
US9421339B2 (en) 1996-07-26 2016-08-23 Resmed Limited Patient interface
US20050022818A1 (en) * 1996-07-26 2005-02-03 Resmed Limited Cushion and mask therefor
US6701927B2 (en) 1996-07-26 2004-03-09 Resmed Limited Full-face mask and mask cushion therefor
US20070261697A1 (en) * 1996-07-26 2007-11-15 Resmed Limited Cushion and mask therefor
US6581602B2 (en) 1996-07-26 2003-06-24 Resmed Limited Nasal mask and mask cushion therefor
US9463295B2 (en) 1996-07-26 2016-10-11 Resmed Limited Mask and mask cushion therefor
US7243651B2 (en) 1996-07-26 2007-07-17 Resmed Limited Cushion and mask therefor
US6871649B2 (en) 1996-07-26 2005-03-29 Resmed Limited Nasal mask cushion assembly
US9770571B2 (en) 1996-10-16 2017-09-26 Resmed Limited Vent valve assembly
US8997739B2 (en) 1996-10-16 2015-04-07 Resmed Limited Vent valve apparatus
US20060185674A1 (en) * 1996-10-16 2006-08-24 Resmed Limited Vent valve apparatus
US6889692B2 (en) 1996-10-16 2005-05-10 Resmed Limited Vent valve assembly
US7059325B2 (en) 1996-10-16 2006-06-13 Resmed Limited Vent assembly
US6006748A (en) * 1996-10-16 1999-12-28 Resmed Limited Vent valve apparatus
US6494207B1 (en) 1996-12-02 2002-12-17 Resmed Limited Harness assembly for a nasal mask
US20070267021A1 (en) * 1996-12-02 2007-11-22 Resmed Limited Harness assembly for a nasal mask
US7036508B2 (en) 1996-12-02 2006-05-02 Resmed Limited Harness assembly for a nasal mask
US6044844A (en) * 1996-12-02 2000-04-04 Resmed Limited Mask and harness assembly
US6029660A (en) * 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6123082A (en) * 1996-12-18 2000-09-26 Resmed Limited Device for preventing or reducing the passage of air through the mouth
US8833371B2 (en) 1997-02-10 2014-09-16 Resmed Limited Mask and vent assembly therefor
US7207335B2 (en) 1997-02-10 2007-04-24 Resmed Limited Mask and vent assembly therefor
US7845354B2 (en) 1997-02-10 2010-12-07 Resmed Limited Mask and vent assembly therefor
US6561191B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
US6561190B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
US20070101998A1 (en) * 1997-02-10 2007-05-10 Resmed Limited Respiratory mask assembly with vent
US8122886B2 (en) 1997-02-10 2012-02-28 Resmed Limited Respiratory mask assembly with vent
US8826910B2 (en) 1997-02-10 2014-09-09 Resmed Limited Mask and vent assembly therefor
USD423096S (en) 1997-02-25 2000-04-18 Resmed Limited Nasal mask cushion
USD428987S (en) 1997-02-25 2000-08-01 Resmed Limited Nasal mask shell
USD435650S (en) 1997-02-25 2000-12-26 Resmed Limited Combined nasal mask shell and cushion
US20060011202A1 (en) * 1998-01-16 2006-01-19 Resmed Limited Forehead support for facial mask
USD807497S1 (en) 1998-01-16 2018-01-09 Resmed Limited Pad for forehead support
US9220861B2 (en) 1998-01-16 2015-12-29 Resmed Limited Forehead support for facial mask
US6119693A (en) * 1998-01-16 2000-09-19 Resmed Limited Forehead support for facial mask
USD782028S1 (en) 1998-01-16 2017-03-21 Resmed Limited Pad for forehead support
US6463931B1 (en) 1998-01-16 2002-10-15 Resmed Limited Forehead support for facial mask
US6997188B2 (en) 1998-01-16 2006-02-14 Resmed Limited Forehead support for facial mask
US6691708B2 (en) 1998-01-16 2004-02-17 Resmed Limited Forehead support for facial mask
US20110094517A1 (en) * 1998-01-16 2011-04-28 Resmed Limited Forehead support for facial mask
US6557556B2 (en) 1998-01-16 2003-05-06 Resmed Limited Forehead support for facial mask
US7882837B2 (en) 1998-01-16 2011-02-08 Resmed Limited Forehead support for facial mask
US20040060561A1 (en) * 1998-01-16 2004-04-01 Resmed Limited Forehead support for facial mask
US6973929B2 (en) 1999-03-29 2005-12-13 Resmed Limited Forehead support for a facial mask
US20050139219A1 (en) * 1999-03-29 2005-06-30 Resmed Limited Forehead support for facial mask
US8646450B2 (en) 1999-03-29 2014-02-11 Resmed Limited Forehead support for a facial mask
US20090114231A1 (en) * 1999-03-29 2009-05-07 Resmed Limited Forehead support for a facial mask
US20110174311A1 (en) * 1999-03-29 2011-07-21 Resmed Limited Forehead support for a facial mask
US7472704B2 (en) 1999-03-29 2009-01-06 Resmed Limited Forehead support for facial mask
US7942149B2 (en) 1999-03-29 2011-05-17 Resmed Limited Forehead support for a facial mask
US20030034034A1 (en) * 1999-06-18 2003-02-20 Resmed Limited Forehead support for facial mask
US7234466B2 (en) 1999-06-18 2007-06-26 Resmed Limited Forehead support for facial mask
US8186348B2 (en) 1999-06-18 2012-05-29 Resmed Limited Forehead support for facial mask
US7610916B2 (en) 1999-06-18 2009-11-03 Resmed Limited Forehead support for facial mask
US9592359B2 (en) 1999-06-18 2017-03-14 Resmed Limited Forehead support for facial mask
US20100012129A1 (en) * 1999-06-18 2010-01-21 Resmed Limited Forehead support for facial mask
US6860269B2 (en) 1999-06-18 2005-03-01 Resmed Limited Forehead support for facial mask
US8528558B2 (en) 2000-05-15 2013-09-10 Resmed Limited Respiratory mask having washout vent and gas washout vent assembly for a respiratory mask
US7926487B2 (en) 2000-05-15 2011-04-19 Resmed Limited Respiratory mask having gas washout vent and gas washout vent assembly for a respiratory mask
US20060196509A1 (en) * 2000-05-15 2006-09-07 Resmed Limited Respiratory mask having gas washout vent & gas washout vent assembly for a respiratory mask
US7100610B2 (en) 2000-10-19 2006-09-05 Map Medizintechnologie Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US7775209B2 (en) 2000-10-19 2010-08-17 Map Medizintechnologie Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US9662467B2 (en) 2000-10-19 2017-05-30 Resmed R&D Germany Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US8746250B2 (en) 2000-10-19 2014-06-10 Resmed R&D Germany Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US20030221691A1 (en) * 2000-10-19 2003-12-04 Achim Biener Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US8371301B2 (en) 2000-10-19 2013-02-12 Resmed R&D Germany Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US20100300447A1 (en) * 2000-10-19 2010-12-02 Map Medizintechnologie Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US7007696B2 (en) 2001-05-18 2006-03-07 Tiara Medical Systems, Inc. Mask cushion and method of using same
US20030019495A1 (en) * 2001-05-18 2003-01-30 Palkon David J. Mask cushion and method of using same
US9072853B2 (en) 2001-09-07 2015-07-07 Resmed Limited Forehead pad for respiratory mask
US20110056498A1 (en) * 2001-09-07 2011-03-10 Resmed Limited Forehead pad for respiratory mask
US9889266B2 (en) 2001-10-22 2018-02-13 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US20110220111A1 (en) * 2001-10-22 2011-09-15 Map Medizin-Technologie Gmbh Application device for a breathing mask arrangement
US20060191538A1 (en) * 2001-10-22 2006-08-31 Map Medizin-Technologie Gmbh Application device for breathing mask arrangement
US9757534B2 (en) 2001-10-22 2017-09-12 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US7992559B2 (en) 2001-10-22 2011-08-09 Map Medizin-Technologie Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US8875710B2 (en) 2001-10-22 2014-11-04 Resmed R&D Germany Gmbh Application device for a breathing mask arrangement
US20110226254A1 (en) * 2001-10-22 2011-09-22 Map Medizin-Technologie Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US7967014B2 (en) 2001-10-22 2011-06-28 Map Medizin-Technologie Gmbh Application device for breathing mask arrangement
US8479738B2 (en) 2001-10-22 2013-07-09 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US9144656B2 (en) 2001-10-22 2015-09-29 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US7320323B2 (en) 2001-10-22 2008-01-22 Map Medizin-Technologie Gmbh Breathing mask device and application device and frontal support device thereof
US20040045550A1 (en) * 2002-01-01 2004-03-11 Bernd Lang Breathing mask arrangement and a forehead support device for same
US20050211252A1 (en) * 2002-01-17 2005-09-29 Map Medizin-Technologie Gmbh Breathing mask arrangement and a forehead support device for same
US9259549B2 (en) 2002-01-17 2016-02-16 Resmed R&D Germany Gmbh Breathing mask arrangement and a forehead support device for same
US7654263B2 (en) 2002-01-17 2010-02-02 Map Medizin-Technologie Gmbh Breathing mask arrangement and a forehead support device for same
US7000614B2 (en) 2002-01-17 2006-02-21 Map Medizin-Technologie Gmbh Breathing mask arrangement and a forehead support device for same
US8402972B2 (en) 2002-01-17 2013-03-26 Resmed R&D Germany Gmbh Breathing mask arrangement and a forehead support device for same
US7290546B2 (en) 2002-03-22 2007-11-06 Invacare Corporation Nasal mask
US8522785B2 (en) 2002-08-05 2013-09-03 Resmed Limited Inextensible headgear and CPAP or ventilator mask assembly with the same
US9597473B2 (en) 2002-08-05 2017-03-21 Resmed Limited Inextensible headgear and CPAP or ventilator mask assembly with same
US9802021B2 (en) 2002-12-06 2017-10-31 Fisher & Paykel Healthcare Limited Mouthpiece
US9956369B2 (en) 2002-12-06 2018-05-01 Fisher & Paykel Healthcare Limited Mouthpiece
US20040182398A1 (en) * 2003-03-22 2004-09-23 Tom Sprinkle Nasal mask
US7621274B2 (en) 2003-03-22 2009-11-24 Invacare Corporation Nasal mask
US8210180B2 (en) 2003-04-10 2012-07-03 Resmed Limited Mask with integral cushion and forehead piece
US9248251B2 (en) 2003-04-10 2016-02-02 Resmed Limited Mask with integral cushion and forehead piece
US20050005940A1 (en) * 2003-04-10 2005-01-13 Resmed Limited Mask with integral cushion and forehead piece
US20110000491A1 (en) * 2003-04-10 2011-01-06 Resmed Limited Mask with integral cushion and forehead piece
US20080092899A1 (en) * 2003-04-10 2008-04-24 Resmed Limited Mask with integral cushion and forehead piece
US8794239B2 (en) 2003-04-10 2014-08-05 Resmed Limited Mask with integral cushion and forehead piece
US7503327B2 (en) 2003-04-10 2009-03-17 Resmed Limited Mask with integral cushion and forehead piece
US7762259B2 (en) 2003-04-10 2010-07-27 Resmed Limited Mask with integral cushion and forehead piece
US8505535B2 (en) 2003-05-02 2013-08-13 Resmed Limited Mask system
US9895503B2 (en) 2003-05-02 2018-02-20 Resmed Limited Mask system
US20050022820A1 (en) * 2003-05-05 2005-02-03 Kwok Philip R. Forehead support for facial mask
US7406965B2 (en) 2003-05-05 2008-08-05 Resmed Limited Forehead support for facial mask
US7942150B2 (en) 2004-04-09 2011-05-17 Resmed Limited Nasal assembly
US8757162B2 (en) 2004-04-09 2014-06-24 Resmed Limited Nasal assembly
US20050241644A1 (en) * 2004-04-09 2005-11-03 Resmed Limited Nasal assembly
US9895505B2 (en) 2004-04-09 2018-02-20 Resmed Limited Nasal assembly
US8353294B2 (en) 2004-06-16 2013-01-15 Resmed Limited Respiratory mask assembly
US9375545B2 (en) 2004-06-16 2016-06-28 Resmed Limited Respiratory mask assembly
US8616211B2 (en) 2005-01-12 2013-12-31 Resmed Limited Cushion for patient interface
US8613281B2 (en) 2005-01-12 2013-12-24 Resmed Limited Cushion for patient interface
US9295800B2 (en) 2005-01-12 2016-03-29 Resmed Limited Cushion for patient interface
US8613280B2 (en) 2005-01-12 2013-12-24 Resmed Limited Cushion for patient interface
US8578935B2 (en) 2005-01-12 2013-11-12 Resmed Limited Cushion for patient interface
US8573215B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8567404B2 (en) 2005-01-12 2013-10-29 Resmed Limited Cushion for patient interface
US8555885B2 (en) 2005-01-12 2013-10-15 Resmed Limited Cushion for patient interface
US8550083B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US8550082B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US8550081B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US8485192B2 (en) 2005-01-12 2013-07-16 Resmed Limited Cushion for patient interface
US8573213B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8573214B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8944061B2 (en) 2005-10-14 2015-02-03 Resmed Limited Cushion to frame assembly mechanism
US9962510B2 (en) 2005-10-25 2018-05-08 Resmed Limited Respiratory mask assembly
US9381316B2 (en) 2005-10-25 2016-07-05 Resmed Limited Interchangeable mask assembly
US20080066761A1 (en) * 2006-09-18 2008-03-20 Invacare Corporation Breathing mask
US8028698B2 (en) 2006-09-18 2011-10-04 Invacare Corporation Breathing mask
US8960196B2 (en) 2007-01-30 2015-02-24 Resmed Limited Mask system with interchangeable headgear connectors
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
US9937315B2 (en) 2007-01-30 2018-04-10 Resmed Limited Mask with removable headgear connector
US20080257354A1 (en) * 2007-04-19 2008-10-23 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
US8869797B2 (en) 2007-04-19 2014-10-28 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
US9770568B2 (en) 2008-03-04 2017-09-26 Resmed Limited Mask system with snap-fit shroud
US9757533B2 (en) 2008-03-04 2017-09-12 Resmed Limited Mask system with snap-fit shroud
US9027556B2 (en) 2008-03-04 2015-05-12 Resmed Limited Mask system
US8550084B2 (en) 2008-03-04 2013-10-08 Resmed Limited Mask system
US8528561B2 (en) 2008-03-04 2013-09-10 Resmed Limited Mask system
US8522784B2 (en) 2008-03-04 2013-09-03 Resmed Limited Mask system
US9950131B2 (en) 2008-03-04 2018-04-24 Resmed Limited Mask system with snap-fit shroud
US9119931B2 (en) 2008-03-04 2015-09-01 Resmed Limited Mask system
US9962511B2 (en) 2008-03-04 2018-05-08 Resmed Limited Mask system with snap-fit shroud
US20090260628A1 (en) * 2008-04-16 2009-10-22 Flynn Sr Stephen Donald Multipurpose therapeutic face mask
US8464715B2 (en) 2008-04-16 2013-06-18 Stephen Donald Flynn, SR. Multipurpose therapeutic face mask

Similar Documents

Publication Publication Date Title
US3608574A (en) Diaphragm-valve especially for a respiratory-gas supply system
US3175473A (en) Spring and fluid pressure actuator
US3488685A (en) Safety valve for regulators
US3393605A (en) Explosively actuated device for high pressure environment
US3180524A (en) Trigger device
US4608976A (en) Breathing protective apparatus with inhalation and exhalation regulator
US3735376A (en) Leakage indicator for a fire extinguisher
US4409978A (en) Portable, self-contained breathing apparatus
US3957044A (en) Self-contained breathing apparatus
US3805780A (en) Mine rescue breathing apparatus
US4116237A (en) Emergency breathing apparatus
US4219017A (en) Pilot regulator
US3147499A (en) Automatic life jacket inflator for selfcontained underwater breathing apparatus
US4619255A (en) Oxygen supply system
US4458711A (en) Vent valve
US3875957A (en) Oxygen-air diluter device
US4996982A (en) Emergency breathing apparatus with holster released regulator valve
US6016802A (en) Breathing apparatus and facepiece therefor
US2596178A (en) Pressure responsive regulator
US3978854A (en) Demand regulator
US3774628A (en) Pressure regulator
US3556098A (en) Apparatus for controlling environmental conditions, suitable for use underwater
US2924147A (en) Blast-free explosive line cutter
US2552595A (en) Oxygen demand breathing system, including means for automatic altitude regulation
US3073301A (en) Aviation quick release valve