New! View global litigation for patent families

USH397H - Modified bubble inturn mask periphery - Google Patents

Modified bubble inturn mask periphery Download PDF

Info

Publication number
USH397H
USH397H US06874742 US87474286A USH397H US H397 H USH397 H US H397H US 06874742 US06874742 US 06874742 US 87474286 A US87474286 A US 87474286A US H397 H USH397 H US H397H
Authority
US
Grant status
Grant
Patent type
Prior art keywords
face
inturn
periphery
piece
mask
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.)
Abandoned
Application number
US06874742
Inventor
David C. Stark
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 Army
Original Assignee
US Secretary of Army
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
    • A62B18/00Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02Masks

Abstract

An improved protective face mask periphery includes an inturn having a flatortion extending inwardly of an inner surface of the face mask, and a curved bubble portion which is concave with respect to the inner surface of the face mask and which curves outwardly into engagement with the wearer's face. The face mask periphery thus forms a good seal with the wearer's face while at the same time being comfortable to wear.

Description

STATEMENT OF GOVERNMENT INTEREST

The invention described herein may be manufactured, used and licensed by or for the Government for Governmental purposes without the payment to me of any royalties thereon.

FIELD AND BACKGROUND OF THE INVENTION

The present invention relates in general to gas mask design, and in particular to a new and useful design for the periphery of the gas mask which makes an efficient seal with the face of a wearer while avoiding discrete pressure areas which lead to discomfort.

The periphery or face seal of a full-face respirator or protective mask, plays a critical role in determining the effectiveness of the respiratory protection system. The periphery of a full-face respirator is that portion of the mask facepiece which contacts the wearer's skin, forming a leak-proof seal which isolates the interior of the mask, the wearer's eyes and the wearer's respiratory tract, from a contaminated environment. Breathing air is filtered through a chemically absorptive medium, such as activated carbon, to remove toxic materials. If the face seal is ineffective or inefficient, contaminated air can leak past the periphery, mix with the filtered air, and be inspirated, thus exposing the wearer to the hazard he or she is attempting to avoid.

The currently fielded, standard military respiratory protective masks (M9A1 Special Purpose, M17 series CB Protective masks, M24 Aviator's mask, and the M25A1 Tanker's mask) have a flat-type periphery shown in FIG. 1. The flat periphery is a very common, effective periphery design for most respirator uses, but it has limits to its effectiveness.

A more effective design for a face seal is the so-called inturn periphery. During work on extra-small (XS) M17 series masks, a bubble inturn was developed to enhance the protection of the mask (FIG. 2). The bubble inturn periphery has superior face-sealing characteristics, due to its ability to conform to facial features more readily, and its larger sealing surface. The inturn periphery as designed, however, had a serious problem with a painful pressure point (hot spot) along the centerline of the periphery, mostly at the forehead of the mask, due to the thickness of the periphery at that point. To alleviate the problem with the hot spot, the XS M17 mask returned to a flat periphery along the forehead. This eliminated the hot spot, but also reduced the effectiveness of the face seal.

During the development of a series of masks designated XM29/30, a new periphery was designed and patented by John Scavnicky and Malcolm Little, under U.S. Pat. No. 4,595,003 (which is incorporated here by reference). A flat inturn periphery as shown in FIG. 3 was used across the forehead, and a revised bubble inturn as shown in FIG. 4 was used along the cheeks of the mask. The two were blended together at the temple of the mask. This mixture of peripheries has proven to be very comfortable, and was another improvement in protection over the standard flat periphery. This is the design of the periphery which has been carried forward into a protective mask program designated the XM40.

SUMMARY OF THE INVENTION

The present invention was a result of an investigation for further improving the protection and comfort afforded the wearer by a gas mask, specifically at the periphery of the gas mask. The invention combines advantages of the flat inturn peripheries and the bubble inturn peripheries while avoiding the drawbacks of each. The inventive periphery thus avoids the hot spot problem of the bubble inturn periphery and avoids the reduced protection afforded by the flat inturn periphery. At the same time the comfort of the flat inturn periphery is retained and the high protection of the bubble inturn periphery is achieved.

Accordingly an object of the present invention is to provide an improvement for a protective face mask having a face piece with an inner surface for facing inwardly of a wearer, and an outer surface for facing outwardly of the wearer, the improvement comprising an inturn connected to and extending inwardly of the inner surface of the face piece at locations spaced from the periphery of the face piece, the inturn having a substantially flat portion having one end connected to the inner surface of the face piece and extending substantially tangentially to the inner surface of the face piece, the flat portion having an outer end, and a bubble portion having one end connected to the outer end of the flat portion and an outer end for engagement against a wearer's face, the bubble portion being curved concavely with repect to the inner surface of the face piece so that the bubble portion curves outwardly against the face of the wearer.

A further object of the present invention is to provide the improved inturn only at the periphery of the face piece for engaging the forehead of the wearer.

A still further object of the invention is to provide a periphery for a face mask which is highly efficient in precluding the entrance of outside contaminants while being comfortable to wear. A further object of the invention is to provide an improved gas mask periphery which is simple in design, rugged in construction and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which a preferred embodiment of the invention is illustrated.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a fragmentary sectional view showing a peripheral portion of the face piece for a protective face mask of conventional design;

FIG. 2 is a view similar to FIG. 1 showing an improved face piece having an XS-M17-style bubble inturn periphery;

FIG. 3 is a view similar to FIG. 1 of a face mask having an improved flat inturn periphery for engagement against the forehead of a wearer;

FIG. 4 is a view similar to FIG. 1 of an improved face mask having a modified bubble inturn for engagement against the cheeks of a wearer; and

FIG. 5 is a view similar to FIG. 1 showing the improved inturn periphery of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 5 illustrates the peripheral area of a gas mask having an improved inturn periphery of the present invention. Before discussing FIG. 5 in detail, reference is first made to FIGS. 1-4.

In FIG. 1 the peripheral area 12 of a protective face mask is shown engaged against part of the face 10 of a wearer. FIG. 2 shows a face piece 14 for a face mask having an outer periphery 16 and a bubble inturn 18. Bubble inturn 18 is curved concavely with respect to an inner surface 20 of face piece 14 so that the inturn 18 curves outwardly into engagement with the wearer's face 10.

FIGS. 3 and 4 show different cross-sectional areas of the periphery of an improved face mask made in accordance with the above-identified patent to Scavnicky and Little. FIG. 3 shows the area of a face piece 24 which is engaged over the forehead 30 of a wearer. A flat inturn 28 extends inwardly from the inner surface of the face piece 24. Flat inturn 28 extends substantially tangentially to the inner surface 32 of the face piece 24 adjacent the outer periphery 36 of the face piece.

FIG. 4 shows a section of the face piece 24 which is meant for engagement against the cheeks 38 of the same wearer as in FIG. 3. At this area of the face piece, a bubble inturn 40 is provided which extends concavely with respect to the inner surface of the face piece and curves outwardly into engagement with the cheeks 38 of the wearer.

According to the present invention as illustrated in FIG. 5, the face piece 44 is made of a rubberlike or elastic synthetic material having a selected thickness A. The thickness A dominates all the way to the outer periphery 46 of the face piece 44.

According to the invention, an inturn generally designated 50 is connected to the inner surface 48 of face piece 44. Inturn 50 has a flat inturn portion 52 which has a length from the inner surface 48 labeled B. The flat inturn portion 52 is connected at its outer end to the inner surface 48 of the face piece 44. A bubble inturn portion 54 is connected to an outer end of flat inturn portion 52. Bubble inturn portion 54 is curved concavely with respect to the inner surface of face piece 44 and curves away from periphery 46, into engagement with the face 60 of a wearer.

The inturn has a thickness labeled C which tapers gradually toward the outer end 56 of the inturn 50.

Inturn portions 52 and 54 of inturn 50 meet at a bend 58. The face piece 44 also has a slight bend 62 between an outer peripheral portion 54A of face piece 44, and the remainder of face piece 44.

The flat inturn portion 52 extends substantially tangentially with respect to the inner surface 48 of face piece 44, at least in the area of the peripheral portion 44a. The bubble inturn portion 54 at its line of connection with portion 52 extends at an angle to portion 52.

In a preferred form of the invention, the face piece 44 has a thickness A of 0.1 inches. The length of flat inturn portion 52 from its inner junction with surface 48, shown at B, is preferably 0.125 inches.

The maximum thickness C of bubble portion 54 is 0.07 inches and this tapers down at end 56 to about 0.045 inches. Inturn 50 has a radius of about 0.035 at end 56.

The inventive inturn 50 of the present invention is advantageously applied only to the forehead area of the face piece 44, the remaining portions of the face piece having a bubble inturn as shown in FIG. 4. Alternatively the entire periphery of face piece 44 can be provided with the inventive inturn 50.

Actual tests to determine the effectiveness of the inventive periphery were conducted and revealed a substantial increase in the confidence level for the face mask. The face mask had improved effectiveness in precluding outside contaminants and also improved comfort factors for the wearer.

By utilizing the flat inturn portion 52 along part of the length of inturn 50, the inturn as a whole can easily bend outwardly of the wearer's face and thus avoid the hot spot experienced in face masks having a periphery as shown at FIG. 2.

At the same time a good seal is made with the wearer's face because of the curved bubble inturn portion 54.

While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.

Claims (5)

What is claimed is:
1. In a protective face mask having a face piece with an inner surface for facing inwardly of a wearer and an outer surface for facing outwardly of the wearer, the face piece having a periphery, the improvement comprising an inturn connected to and extending inwardly from the inner surface of the face piece at a location spaced from the periphery, the inturn extending away from the periphery and having a flat portion connected directly to the inner surface of the face piece and extending substantially tangentially to the inner surface of the face piece, and a curved bubble portion connected to the flat portion and concave with respect to the inner surface of the face piece so as to curve outwardly into engagement with a wearer's face.
2. An improved protective face mask according to claim 1 wherein the face piece has a forehead portion, said inturn being connected only at the forehead portion.
3. An improved face mask according to claim 1 wherein the flat portion is connected to the bubble portion at a bend.
4. The improved face mask according to claim 3 wherein the flat portion has a length of about 0.125 inches.
5. An improved face mask according to claim 4 wherein the face piece has a thickness of about 0.1 inches and the inturn has a maximum thickness of about 0.07 inches, the inturn tapering outwardly toward an outer end of said bubble portion which is faced away from the periphery.
US06874742 1986-06-13 1986-06-13 Modified bubble inturn mask periphery Abandoned USH397H (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06874742 USH397H (en) 1986-06-13 1986-06-13 Modified bubble inturn mask periphery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06874742 USH397H (en) 1986-06-13 1986-06-13 Modified bubble inturn mask periphery

Publications (1)

Publication Number Publication Date
USH397H true USH397H (en) 1988-01-05

Family

ID=25364467

Family Applications (1)

Application Number Title Priority Date Filing Date
US06874742 Abandoned USH397H (en) 1986-06-13 1986-06-13 Modified bubble inturn mask periphery

Country Status (1)

Country Link
US (1) USH397H (en)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5492116A (en) * 1992-12-17 1996-02-20 Respironics Inc. Respiratory mask with floating seal responsive to pressurized gas
US5655527A (en) * 1994-06-03 1997-08-12 Respironics Inc. Respiratory mask with floating seal responsive to pressurized gas
DE19848309A1 (en) * 1998-10-13 2000-04-27 Auergesellschaft Gmbh Seal for breathing protection half and full masks involves closed seal and matching frame of solid gel material arranged in mask body
US6112746A (en) * 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US6192886B1 (en) * 1996-10-17 2001-02-27 Hans Rudolph, Inc. Nasal mask
US6347631B1 (en) 1999-11-09 2002-02-19 Mallinckrodt, Inc. Cantilever device and method for breathing devices and the like
US6467483B1 (en) * 1999-07-28 2002-10-22 Respironics, Inc. Respiratory 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
US6516802B2 (en) 1999-03-26 2003-02-11 Mallinckrodt, Inc. Method and combination for treating sleep apnea using a cantilever mask attachment device
US20040045550A1 (en) * 2002-01-01 2004-03-11 Bernd Lang Breathing mask arrangement and a forehead support device for same
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
US7007690B1 (en) * 2000-08-31 2006-03-07 The United States Of America As Represented By The Secretary Of The Army Advanced chemical/biological crew 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
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
US7406965B2 (en) 2003-05-05 2008-08-05 Resmed Limited Forehead support for facial mask
US20080257354A1 (en) * 2007-04-19 2008-10-23 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
US7621274B2 (en) 2003-03-22 2009-11-24 Invacare Corporation Nasal mask
US20100258131A1 (en) * 2009-04-08 2010-10-14 Scott Technologies, Inc. Face seals for respirators and method of manufacturing respirators
US20110056498A1 (en) * 2001-09-07 2011-03-10 Resmed Limited Forehead pad for respiratory mask
US7967014B2 (en) 2001-10-22 2011-06-28 Map Medizin-Technologie Gmbh Application device for breathing mask arrangement
US8136523B2 (en) 2007-03-19 2012-03-20 Hans Rudolph, Inc. Ventilation mask with continuous seal connected by resilient cushion
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
US8522784B2 (en) 2008-03-04 2013-09-03 Resmed Limited Mask system
USD690003S1 (en) 2002-08-09 2013-09-17 Resmed Limited Yoked headgear
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

Cited By (96)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5492116A (en) * 1992-12-17 1996-02-20 Respironics Inc. Respiratory mask with floating seal responsive to pressurized gas
US5655527A (en) * 1994-06-03 1997-08-12 Respironics Inc. Respiratory mask with floating seal responsive to pressurized gas
US20040094159A1 (en) * 1996-07-26 2004-05-20 Resmed Limited Breathing mask and mask cushion therefor
US6112746A (en) * 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US7178527B2 (en) 1996-07-26 2007-02-20 Resmed Limited Nasal mask and mask cushion therefor
US6581602B2 (en) 1996-07-26 2003-06-24 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
US6701927B2 (en) * 1996-07-26 2004-03-09 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
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)
US8056561B2 (en) 1996-07-26 2011-11-15 Resmed Limited Full-face mask and mask cushion therefor
US6634358B2 (en) 1996-07-26 2003-10-21 Resmed Limited Nasal mask cushion assembly
US20070107735A1 (en) * 1996-07-26 2007-05-17 Resmed Limited Mask
US8636006B2 (en) 1996-07-26 2014-01-28 Resmed Limited Mask
US7069933B2 (en) 1996-07-26 2006-07-04 Resmed Limited Breathing mask and mask cushion therefor
US9421339B2 (en) 1996-07-26 2016-08-23 Resmed Limited Patient interface
US6192886B1 (en) * 1996-10-17 2001-02-27 Hans Rudolph, Inc. Nasal mask
DE19848309A1 (en) * 1998-10-13 2000-04-27 Auergesellschaft Gmbh Seal for breathing protection half and full masks involves closed seal and matching frame of solid gel material arranged in mask body
US6516802B2 (en) 1999-03-26 2003-02-11 Mallinckrodt, Inc. Method and combination for treating sleep apnea using a cantilever mask attachment device
US6467483B1 (en) * 1999-07-28 2002-10-22 Respironics, Inc. Respiratory mask
US6347631B1 (en) 1999-11-09 2002-02-19 Mallinckrodt, Inc. Cantilever device and method for breathing devices and the like
US7007690B1 (en) * 2000-08-31 2006-03-07 The United States Of America As Represented By The Secretary Of The Army Advanced chemical/biological crew 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
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
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
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
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
US20030019495A1 (en) * 2001-05-18 2003-01-30 Palkon David J. Mask cushion and method of using same
US7007696B2 (en) * 2001-05-18 2006-03-07 Tiara Medical Systems, Inc. Mask cushion and method of using same
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
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
US8875710B2 (en) 2001-10-22 2014-11-04 Resmed R&D Germany Gmbh Application device for a 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
US7320323B2 (en) 2001-10-22 2008-01-22 Map Medizin-Technologie Gmbh Breathing mask device and application device and frontal support device thereof
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
US7967014B2 (en) 2001-10-22 2011-06-28 Map Medizin-Technologie Gmbh Application device for breathing mask arrangement
US20040045550A1 (en) * 2002-01-01 2004-03-11 Bernd Lang 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
US7654263B2 (en) 2002-01-17 2010-02-02 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
US8402972B2 (en) 2002-01-17 2013-03-26 Resmed R&D Germany Gmbh Breathing mask arrangement and a forehead support device for same
USD736908S1 (en) 2002-08-09 2015-08-18 Resmed Limited Headgear-to-frame connection component for respiratory mask
USD690003S1 (en) 2002-08-09 2013-09-17 Resmed Limited Yoked headgear
USD766421S1 (en) 2002-08-09 2016-09-13 Resmed Limited Headgear for mask
USD719254S1 (en) 2002-08-09 2014-12-09 Resmed Limited Elbow connector for respiratory mask
US7621274B2 (en) 2003-03-22 2009-11-24 Invacare Corporation Nasal mask
US8794239B2 (en) 2003-04-10 2014-08-05 Resmed Limited Mask with integral cushion and forehead piece
US8210180B2 (en) 2003-04-10 2012-07-03 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
US9248251B2 (en) 2003-04-10 2016-02-02 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
US20050005940A1 (en) * 2003-04-10 2005-01-13 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
US9895503B2 (en) 2003-05-02 2018-02-20 Resmed Limited Mask system
US8505535B2 (en) 2003-05-02 2013-08-13 Resmed Limited Mask system
US7406965B2 (en) 2003-05-05 2008-08-05 Resmed Limited Forehead support for facial mask
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
US8555885B2 (en) 2005-01-12 2013-10-15 Resmed Limited Cushion for patient interface
US8573215B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8578935B2 (en) 2005-01-12 2013-11-12 Resmed Limited Cushion for patient interface
US8613280B2 (en) 2005-01-12 2013-12-24 Resmed Limited Cushion for patient interface
US8613281B2 (en) 2005-01-12 2013-12-24 Resmed Limited Cushion for patient interface
US8616211B2 (en) 2005-01-12 2013-12-31 Resmed Limited Cushion for patient interface
US8573214B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8550082B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US8573213B2 (en) 2005-01-12 2013-11-05 Resmed Limited Cushion for patient interface
US8550083B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US8567404B2 (en) 2005-01-12 2013-10-29 Resmed Limited Cushion for patient interface
US8550081B2 (en) 2005-01-12 2013-10-08 Resmed Limited Cushion for patient interface
US9295800B2 (en) 2005-01-12 2016-03-29 Resmed Limited Cushion for patient interface
US8485192B2 (en) 2005-01-12 2013-07-16 Resmed Limited Cushion for patient interface
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
US20080066761A1 (en) * 2006-09-18 2008-03-20 Invacare Corporation Breathing mask
US8028698B2 (en) 2006-09-18 2011-10-04 Invacare Corporation Breathing mask
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
US8960196B2 (en) 2007-01-30 2015-02-24 Resmed Limited Mask system with interchangeable headgear connectors
US8136523B2 (en) 2007-03-19 2012-03-20 Hans Rudolph, Inc. Ventilation mask with continuous seal connected by resilient cushion
US8869797B2 (en) 2007-04-19 2014-10-28 Resmed Limited Cushion and cushion to frame assembly mechanism for patient interface
US20080257354A1 (en) * 2007-04-19 2008-10-23 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
US8528561B2 (en) 2008-03-04 2013-09-10 Resmed Limited Mask system
US9119931B2 (en) 2008-03-04 2015-09-01 Resmed Limited Mask system
US8550084B2 (en) 2008-03-04 2013-10-08 Resmed Limited Mask system
US8522784B2 (en) 2008-03-04 2013-09-03 Resmed Limited Mask system
US9027556B2 (en) 2008-03-04 2015-05-12 Resmed Limited Mask system
US9757533B2 (en) 2008-03-04 2017-09-12 Resmed Limited Mask system with snap-fit shroud
US20100258131A1 (en) * 2009-04-08 2010-10-14 Scott Technologies, Inc. Face seals for respirators and method of manufacturing respirators
WO2010117519A1 (en) * 2009-04-08 2010-10-14 Scott Technologies, Inc. Face seals for respirators and method of manufacturing respirators
US8955516B2 (en) 2009-04-08 2015-02-17 Scott Technologies, Inc. Face seals for respirators and method of manufacturing respirators

Similar Documents

Publication Publication Date Title
US3288138A (en) Surgical mask
US3575167A (en) Multipurpose breathing apparatus
US3238943A (en) Aid breathing system
US3049121A (en) Oronasal mask
US5450627A (en) Protective garment containing lumbar support means
US5592937A (en) Respirator mask with stiffening elements
US5067174A (en) Protective headgear
US5878742A (en) Airvisor delivery system
US4831664A (en) Garment for protecting against environmental contamination
US4901370A (en) Garment for protecting against environmental contamination
US6457473B1 (en) Drop-down face mask assembly
US4853980A (en) Protective buffer padding element
US4914957A (en) Leak test adaptor apparatus for facilitating leak testing face mask respirators
US3438060A (en) Airmen's helmets
US2415846A (en) Oronasal mask
US4619254A (en) Protective respirator hood with inner and outer bibs
US5715814A (en) Respiration mask
EP0853962B1 (en) Protection mask, in particular for underwater use
US6418928B1 (en) Multi-seal respirator mask
US6035451A (en) Protective helmet system with cam for attaching first and second face shields thereto
US6763835B1 (en) Chemical/biological special operations mask
US5058210A (en) Disposable sweat liner for safety hats
US4354520A (en) Pressure/demand exhalation valve
US4573463A (en) Breathing mask
US7302951B2 (en) Unidirectional respirator valve

Legal Events

Date Code Title Description
AS Assignment

Owner name: UNITED STATES OF AMERICA, AS REPRESENTED BY THE SE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STARK, DAVID C.;REEL/FRAME:004595/0140

Effective date: 19860605