US3363833A - Elastic bag for artificial respiration apparatus - Google Patents

Elastic bag for artificial respiration apparatus Download PDF

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Publication number
US3363833A
US3363833A US46412665A US3363833A US 3363833 A US3363833 A US 3363833A US 46412665 A US46412665 A US 46412665A US 3363833 A US3363833 A US 3363833A
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Prior art keywords
ring
bag
shaped part
shaped
part
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Expired - Lifetime
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Laerdal Asmund Sigurd
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ASMUND SIGURD LAERDAL
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Laerdal Asmund Sigurd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057Pumps therefor
    • A61M16/0078Breathing bags
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057Pumps therefor
    • A61M16/0084Pumps therefor self-reinflatable by elasticity, e.g. resuscitation squeeze bags
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/208Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves

Description

Jan. 16, 1968 A. s. LAERDAL ELASTIQ BAG FOR'ARTIFICIAL RESPIRATION APPARATUS Filed June 15, 1965 INVENTOR United States Patent 3,363,833 ELASTIC BAG FOR ARTIFICIAL RESPIRATION APPARATUS Asmund Sigurd Laerdal, Stavanger, Norway Filed June 15, 1965, Ser. No. 464,126 Claims priority, application Norway, June 15,1964, 153,648 1 Claim. (Cl. 230-469) The present invention relates to an elastic bag for an artificial respiration apparatus for supplying air or oxygen to the lungs of a patient and adpted to be elastically compressed in a direction transverse to its longitudinal axis. After being compressed, this bag because of its elasticity returns to its original shape and thereby draws into it air or oxygen which during the subsequent compression of the bag is forced into the lungs of the patient.

The elastic bag for such apparatus which were known prior to this invention have the disadvantage that they have considerable dimensions in the uncompressed condition and that they must therefore be kept in special containers for which a physician may not always have sufficient space in his instrument bag.

It is an object of the present invention to provide an elastic bag of the type and for the purpose as mentioned above which may be made of such a small size that it may be easily stored in the instrument bag of a physician. According to the invention, this object is attained by designing the bag so as to permit it to be folded together in its axial direction. When the elastic bag according to the invention is in its folded or collapsed condition, it takes up a relatively small space which only amounts to a fraction of its original volume and it may therefore be stored within a much smaller space than was previously required for storing one of the elastic bags of the usual type.

The elastic bag according to the invention may consist of a central part which may not be folded in its axial direction, and of two outer parts which may be folded into the central part and are tapered from the central part toward their outer ends. This facilitates the operation of folding together or collapsing the bag. According to another feature of the invention, the two outer parts of the elastic bag are provided with constrictions which extend around the entire periphery of these parts. This has the advantage that, after being folded together, the bag will remain in this folded or collapsed condition and will not open up to its full size of its own accord. According to another feature of the invention, this advantage is further enhanced by making the Wall portions of the outer paits which are located between the constrictions of a greater thickness than the wall portions of the constricted parts and also of the central part. This requires a certain amount of force to be exerted in order to overcome the tendency of the outer parts of the bag to remain in their inwardly folded position and to pull these parts out of the central part so that the bag will again have its full s1ze.

The elastic bag according to the invention is provided similarly as the conventional elastic bags with valves at both ends. The central part of the bag is for this purpose designed so as to ensure that, when the bag is in its collapsed position, the two valves will be located within the area which is surrounded by the central part and will thus be protected from being damaged.

The features and advantages of the present invention will become further apparent from the following detailed description thereof which is to be read with reference to the accompanying drawings in which:

FIGURE 1 shows a perspective view of an elastic bag according to the invention which is connected to a face mask;

FIGURE 2 shows a perspective view of the elastic bag according to FIGURE 1 in the collapsed position; while FIGURE 3 shows an axial cross section of the upper part of the elastic bag according to FIGURE 1.

Referring to the drawings, the elastic: bag 1 according to the invention consists of an elastic material, for example, of natural or synthetic rubber or a suitable thermoplastic. It comprises a central part 2 and two outer parts 3 and 4 which are integrally connected thereto. The bag 1 may be made of two equal halves which are firmly secured and sealed to each other at 5 and consist of one half of the central part 2 together with the outer part 2 and of the other half of the central. part 2 together with the other outer part 4.

The diameter of the outer parts 3 and 4 decreases from the central part 2 toward the outer ends and they are provided with peripherally extending constrictions 6, 7 and 8, 9 which are spaced from each other at suitable distances in the axial direction of the expanded bag. The outer ends of the outer parts 3 and 4 are provided With apertures into which valves 13 and 14 are inseited. Valve 13 may be connected to a face mask 15.

If the bag 1 according to FIGURE 1 is compressed in its axial direction, the outer parts 3 and 4 will be folded inwardly at the constrictions 6, 7 and 8, 9. The annular wall portions 16 and 17 are then inwardly bent at an angle of approximately about the edges 18 and 19 into the central part 2, while the annular wall portions 20 and 21 retain their original positions relative to the axis of the axially symmetrical bag 1. During the compression of the bag in its axial direction, the annular wall portions 22 and 23 will likewise be inwardly bent at an angle of approximately 180 about the constrictions 7 and 9. However, when these wall portions are bent beyond a certain dead-center position, they will carry out the further inward movement with a snap action. At the same time, the inwardly bent wall portions 16, 17, 22 and 23 are given a certain tension which insures that the inwardly folded outer bag parts 3 and 4 will be retained in their respective positions within the central bag part 2. It is therefore necessary to apply a certain amount of force in order to overcome the tension of the inwardly bent wall portions 16, 17, 22, and 23 and the dead-center portions between them in order to bend these parts again outwardly so that the bag 1 will return to its expanded operative position, as shown in FIGURE 1.

The constrictions 6 to 9 may also be provided in the form of recessed or projecting corrugations. The bag 1 may in this case be made of a uniform wall thickness.

In its collapsed position, the bag 1 may be stored in a container or pouch, for example, in such a manner that one end of the bag is held by a snap button on the bottom of the container or pouch so as to permit the bag 1 to be opened to its full size by a single manipulation. The gripping force of the snap button may then be slightly stronger than the force which is required for expanding the bag, so that at the end of the expanding movement the elastic bag 1 may be pulled completely out of the container or panel.

Although my invention has been illustrated and described with reference to the preferred embodiment thereof, I wish to have it understood that it is in no way limited to the details of such embodiment but is capable of numerous modifications within the scope of the appended claim.

Having thus fully disclosed my invention, what I claim is:

1. An expansible bag for artificial respiration apparatus, comprising a first ring-shaped part, a second ringshaped part arranged on each end of said first ring-shaped part and concentrically arranged in respect to said first O ring-shaped part and being of a size to fit into said first ring-shaped part, said second ring-shaped part being joined to said first ring-shaped part around its periphery adjacent one side by an elastic portion thereof of reduced wall thickness, said second ring-shaped part being collapsible Within said first ring-shaped part and constructed so as to be retainable therein Without holding means for reducing the axial length of said bag, and means closing each end of said first and second ring-shaped parts, each said second ring-shaped part being connected to said first ring-shaped part by an elastic portion of reduced wall thickness and each being collapsible Within said first ringshaped part for reducing the axial length of the bag, said first ring-shaped part being of thin walled construction for sensing variations of pressure within the bag through the wall, said means closing each end of said first and second ring-shaped parts, comprising a valve closing the outer end of each of said second ring-shaped parts, said second ring-shaped parts being collapsible Within said first ring-shaped parts and being automatically retainable therein upon collapsing to reduce the axial length of the bag.

References Cited UNITED STATES PATENTS 2,833,448 5/1958 Lerner 222-209 2,834,296 5/1958 Neufeld 103-148 2,880,902 4/1959 Owen 220-8 2,886,084 5/1959 Davison 150-.5 3,009,459 11/1961 Ruben 230l69 3,201,111 8/1965 Afton 2151.5

l5 DONLEY I. STOCKING, Pril'nary Examiner.

\VILLIAM L. FREEH, Assistant Examiner.

Claims (1)

1. AN EXPANSIBLE BAG FOR ARTIFICIAL RESPIRATION APPARATUS, COMPRISING A FIRST RING-SHAPED PART, A SECOND RINGSHAPED PART ARRANGED ON EACH END OF SAID FIRST RING-SHAPED PART AND CONCENTRICALLY ARRANGED IN RESPECT TO SAID FIRST RING-SHAPED PART BEING OF A SIZE TO FIT INTO SAID FIRST RING-SHAPED PART, SAID SECOND RING-SHAPED PART BEING JOINED TO SAID FIRST RING-SHAPED PART AROUND ITS PERIPHERY ADJACENT ONE SIDE BY AN ELASTIC PORTION THEREOF OF REDUCED WALL THICKNESS, SAID SECOND RING-SHAPED PART BEING COLLAPSIBLE WITHIN SAID FIRST RING-SHAPED PART AND CONSTRUCTED SO AS TO BE RETAINABLE THEREIN WITHOUT HOLDING MEANS FOR FEDUCING THE AXIAL LENGTH OF SAID BAG, AND MEANS CLOSING EACH END OF SAID FIRST AND SECOND RING-SHAPED PARTS, EACH SAID SECOND RING-SHAPED PART BEING CONNECTED TO SAID FIRST RING-SHAPED PART BY AN ELASTIC PORTION OF REDUCED WALL THICHNESS AND EACH BEING COLLAPSIBLE WITHIN SAID FIRST RINGSHAPED PART FOR REDUCING THE AXIAL LENGTH OF THE BAG, SAID FIRST RING-SHAPED PART BEING OF THIN WALLED CONSTRUCTION FOR SENSING VARIATIONS OF PRESSURE WITHIN THE BAG THROUGH FOR WALL, SAID MEANS CLOSING EACH END OF SAID AND SECOND RING-SHAPED PARTS, COMPRISING A VALVE CLOSING THE OUTER END OF EACH OF SAID SECOND RING-SHAPED PARTS, SAID SECOND RING-SHAPED PARTS BEING COLLAPSIBLE WITHIN SAID FIRST RING-SHAPD PARTS AND BEING AUTOMATICALLY RETAINABLE THEREIN UPON COLLAPSING TO REDUCE THE AXIAL LENGTH OF THE BAG.
US46412665 1964-06-15 1965-06-15 Elastic bag for artificial respiration apparatus Expired - Lifetime US3363833A (en)

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NO15364864 1964-06-15

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US3363833A true US3363833A (en) 1968-01-16

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DE (3) DE6600376U (en)
FR (1) FR1436528A (en)
GB (1) GB1112298A (en)
NL (1) NL146054B (en)

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US4532923A (en) * 1983-08-02 1985-08-06 D-Two Systems International Inc. Air bag
US4774941A (en) * 1983-05-04 1988-10-04 Intertech Resources Inc. Resuscitator bag
US5226793A (en) * 1991-05-23 1993-07-13 Stovall Kalena D Balloon pump
US5233977A (en) * 1990-02-02 1993-08-10 Marquest Medical Products, Inc. Anesthesia/breather bag with a roughened exterior surface
US5359998A (en) * 1992-10-23 1994-11-01 Lloyd Lee J Manual resuscitator
US5501214A (en) * 1994-09-26 1996-03-26 Respironics, Inc. Non-rebreathing valve and valve element therefor
US5520173A (en) * 1993-12-08 1996-05-28 Heraeus Instruments Gmbh Ventilation bag
EP0743075A2 (en) * 1995-05-16 1996-11-20 Willy Rüsch Ag Resuscitation bag
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
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
EP1201259A1 (en) * 2000-10-31 2002-05-02 Institut für Aerosol-Medizin InAMed GmbH Bag for inhalation
US6427687B1 (en) * 1991-10-15 2002-08-06 Mallinckrodt, Inc. Resuscitator regulator with carbon dioxide detector
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
US6527011B1 (en) 2000-05-18 2003-03-04 Robert F. Mantz Flexible retainer ring for duck bill valve
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
US20040064067A1 (en) * 2002-10-01 2004-04-01 Scimed Life Systems, Inc. Fluid pressure-actuated medical device
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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
US20070078307A1 (en) * 2005-09-30 2007-04-05 Debreczeny Martin P Sensor for tissue gas detection and technique for using the same
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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
US20080077034A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US20080075633A1 (en) * 2006-09-25 2008-03-27 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080076993A1 (en) * 2006-09-27 2008-03-27 Nellcor Puritan Bennett Incorporated Medical sensor and technique for using the same
US20080081003A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080078394A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
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US20080257345A1 (en) * 2003-04-16 2008-10-23 Trudell Medical International Antistatic medication delivery apparatus
US20080257354A1 (en) * 2007-04-19 2008-10-23 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
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US20090165801A1 (en) * 2007-12-31 2009-07-02 Nellcor Puritan Bennett Llc Carbon dioxide detector having an acrylic based substrate
US20090246797A1 (en) * 2008-03-28 2009-10-01 Nellcor Puritan Bennett Llc Medical device for the assessment of internal organ tissue and technique for using the same
US7811276B2 (en) 2005-11-10 2010-10-12 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
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
US8459252B2 (en) 2002-05-02 2013-06-11 Pari Innovative Manufacturers, Inc. Aerosol medication inhalation system
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
US8522784B2 (en) 2008-03-04 2013-09-03 Resmed Limited Mask system
US8522785B2 (en) 2002-08-05 2013-09-03 Resmed Limited Inextensible headgear and CPAP or ventilator mask assembly with the same
USRE45068E1 (en) 2000-04-11 2014-08-12 Trudell Medical International Aerosol delivery apparatus
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
US9700689B2 (en) 2002-05-21 2017-07-11 Trudell Medical International Medication delivery apparatus and system and methods for the use and assembly thereof
US9802021B2 (en) 2002-12-06 2017-10-31 Fisher & Paykel Healthcare Limited Mouthpiece

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Cited By (220)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4774941A (en) * 1983-05-04 1988-10-04 Intertech Resources Inc. Resuscitator bag
US4532923A (en) * 1983-08-02 1985-08-06 D-Two Systems International Inc. Air bag
US5233977A (en) * 1990-02-02 1993-08-10 Marquest Medical Products, Inc. Anesthesia/breather bag with a roughened exterior surface
US5226793A (en) * 1991-05-23 1993-07-13 Stovall Kalena D Balloon pump
US6427687B1 (en) * 1991-10-15 2002-08-06 Mallinckrodt, Inc. Resuscitator regulator with carbon dioxide detector
US5359998A (en) * 1992-10-23 1994-11-01 Lloyd Lee J Manual resuscitator
US6123071A (en) * 1993-06-18 2000-09-26 Resmed Limited Facial masks for assisted respiration or CPAP
US5520173A (en) * 1993-12-08 1996-05-28 Heraeus Instruments Gmbh Ventilation bag
US5501214A (en) * 1994-09-26 1996-03-26 Respironics, Inc. Non-rebreathing valve and valve element therefor
EP0743075A2 (en) * 1995-05-16 1996-11-20 Willy Rüsch Ag Resuscitation bag
EP0743075A3 (en) * 1995-05-16 1997-05-21 Ruesch Willy Ag Resuscitation bag
US6581602B2 (en) 1996-07-26 2003-06-24 Resmed Limited Nasal mask and mask cushion therefor
US7069933B2 (en) 1996-07-26 2006-07-04 Resmed Limited Breathing mask and mask cushion therefor
US7950392B2 (en) 1996-07-26 2011-05-31 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
US8522783B2 (en) 1996-07-26 2013-09-03 Resmed Limited Cushion and mask therefor
US7178527B2 (en) 1996-07-26 2007-02-20 Resmed Limited Nasal mask and mask cushion therefor
US6871649B2 (en) 1996-07-26 2005-03-29 Resmed Limited Nasal mask cushion assembly
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US6357441B1 (en) 1996-07-26 2002-03-19 Resmed Limited Nasal mask and mask cushion therefor
US20050022818A1 (en) * 1996-07-26 2005-02-03 Resmed Limited Cushion and mask therefor
US20070107735A1 (en) * 1996-07-26 2007-05-17 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)
US20040094159A1 (en) * 1996-07-26 2004-05-20 Resmed Limited Breathing mask and mask cushion therefor
US8813748B2 (en) 1996-07-26 2014-08-26 Resmed Limited Full-face mask and mask cushion therefor
US6513526B2 (en) 1996-07-26 2003-02-04 Resmed Limited Full-face mask and mask cushion therefor
US7243651B2 (en) 1996-07-26 2007-07-17 Resmed Limited Cushion and mask therefor
US9421339B2 (en) 1996-07-26 2016-08-23 Resmed Limited Patient interface
US6701927B2 (en) 1996-07-26 2004-03-09 Resmed Limited Full-face mask and mask cushion therefor
US9463295B2 (en) 1996-07-26 2016-10-11 Resmed Limited Mask and mask cushion therefor
US6634358B2 (en) 1996-07-26 2003-10-21 Resmed Limited Nasal mask cushion assembly
US20070261697A1 (en) * 1996-07-26 2007-11-15 Resmed Limited Cushion and mask therefor
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US8997739B2 (en) 1996-10-16 2015-04-07 Resmed Limited Vent valve apparatus
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
US9770571B2 (en) 1996-10-16 2017-09-26 Resmed Limited Vent valve assembly
US6889692B2 (en) 1996-10-16 2005-05-10 Resmed Limited Vent valve assembly
US20060185674A1 (en) * 1996-10-16 2006-08-24 Resmed Limited Vent valve apparatus
US20070267021A1 (en) * 1996-12-02 2007-11-22 Resmed Limited Harness assembly for a nasal mask
US6494207B1 (en) 1996-12-02 2002-12-17 Resmed Limited Harness assembly for a nasal mask
US6044844A (en) * 1996-12-02 2000-04-04 Resmed Limited Mask and harness assembly
US7036508B2 (en) 1996-12-02 2006-05-02 Resmed Limited Harness assembly for a nasal mask
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
US7207335B2 (en) 1997-02-10 2007-04-24 Resmed Limited Mask and vent assembly therefor
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Also Published As

Publication number Publication date
NL6506877A (en) 1965-12-16
DE6600376U (en) 1969-01-23
FR1436528A (en) 1966-04-22
DE1913425U (en) 1965-04-08
NL146054B (en) 1975-06-16
DE1616421A1 (en) 1969-08-28
GB1112298A (en) 1968-05-01

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