[go: up one dir, main page]

USD572816S1 - Cushion for breathing mask - Google Patents

Cushion for breathing mask Download PDF

Info

Publication number
USD572816S1
USD572816S1 US29/239,063 US23906305F USD572816S US D572816 S1 USD572816 S1 US D572816S1 US 23906305 F US23906305 F US 23906305F US D572816 S USD572816 S US D572816S
Authority
US
United States
Prior art keywords
cushion
breathing mask
view
breathing
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.)
Expired - Lifetime
Application number
US29/239,063
Inventor
Bernd Christoph Lang
Achim Biener
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.)
Resmed Humidification Technologies GmbH
Original Assignee
MAP Medizin Technologie GmbH
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
Priority claimed from US29/190,511 external-priority patent/USD502260S1/en
Priority claimed from US29/219,617 external-priority patent/USD515698S1/en
Priority to US29/239,063 priority Critical patent/USD572816S1/en
Application filed by MAP Medizin Technologie GmbH filed Critical MAP Medizin Technologie GmbH
Priority to US29/290,110 priority patent/USD585982S1/en
Publication of USD572816S1 publication Critical patent/USD572816S1/en
Application granted granted Critical
Priority to US29/311,143 priority patent/USD614762S1/en
Priority to US29/347,618 priority patent/USD685462S1/en
Priority to US29/456,114 priority patent/USD708735S1/en
Assigned to RESMED R&D GERMANY GMBH reassignment RESMED R&D GERMANY GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: MAP MEDIZIN-TECHNOLOGIE GMBH
Assigned to MAP MEDIZIN-TECHNOLOGIE GMBH reassignment MAP MEDIZIN-TECHNOLOGIE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BIENER, ACHIM, LANG, BERND
Assigned to ResMed Humidification Technologies GmbH reassignment ResMed Humidification Technologies GmbH MERGER (SEE DOCUMENT FOR DETAILS). Assignors: RESMED R&D GERMANY GMBH
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Description

FIG. 1 is a perspective view of a cushion according to an embodiment of the present invention;
FIG. 2 is a rear view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
Throughout the various figures of the drawings, certain views may not be provided. The omission of a particular view is intended to convey that the element(s) depicted is/are plain and/or unornamented in that view.

Claims (1)

    CLAIM
  1. The ornamental design for a cushion for a breathing mask, as shown.
US29/239,063 2002-01-17 2005-09-27 Cushion for breathing mask Expired - Lifetime USD572816S1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US29/239,063 USD572816S1 (en) 2002-01-17 2005-09-27 Cushion for breathing mask
US29/290,110 USD585982S1 (en) 2002-01-17 2007-10-23 Respiratory mask frame
US29/311,143 USD614762S1 (en) 2002-01-17 2008-12-31 Breathing mask
US29/347,618 USD685462S1 (en) 2002-01-17 2010-03-16 Breathing mask
US29/456,114 USD708735S1 (en) 2002-01-17 2013-05-29 Frame for breathing mask

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE40200458 2002-01-17
DE40200458 2002-01-17
US29/163,978 USD484237S1 (en) 2002-01-17 2002-07-17 Modular breathing mask
US29/190,511 USD502260S1 (en) 2002-01-17 2003-09-23 Forehead support and partial frame portion
US29/219,617 USD515698S1 (en) 2002-01-17 2004-12-21 Forehead support for a breathing mask
US29/239,063 USD572816S1 (en) 2002-01-17 2005-09-27 Cushion for breathing mask

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US29/219,617 Division USD515698S1 (en) 2002-01-17 2004-12-21 Forehead support for a breathing mask
US29/219,617 Continuation USD515698S1 (en) 2002-01-17 2004-12-21 Forehead support for a breathing mask

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US29/290,110 Continuation USD585982S1 (en) 2002-01-17 2007-10-23 Respiratory mask frame

Publications (1)

Publication Number Publication Date
USD572816S1 true USD572816S1 (en) 2008-07-08

Family

ID=29724321

Family Applications (6)

Application Number Title Priority Date Filing Date
US29/163,978 Expired - Lifetime USD484237S1 (en) 2002-01-17 2002-07-17 Modular breathing mask
US29/239,063 Expired - Lifetime USD572816S1 (en) 2002-01-17 2005-09-27 Cushion for breathing mask
US29/290,110 Expired - Lifetime USD585982S1 (en) 2002-01-17 2007-10-23 Respiratory mask frame
US29/311,143 Expired - Lifetime USD614762S1 (en) 2002-01-17 2008-12-31 Breathing mask
US29/347,618 Active USD685462S1 (en) 2002-01-17 2010-03-16 Breathing mask
US29/456,114 Active USD708735S1 (en) 2002-01-17 2013-05-29 Frame for breathing mask

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US29/163,978 Expired - Lifetime USD484237S1 (en) 2002-01-17 2002-07-17 Modular breathing mask

Family Applications After (4)

Application Number Title Priority Date Filing Date
US29/290,110 Expired - Lifetime USD585982S1 (en) 2002-01-17 2007-10-23 Respiratory mask frame
US29/311,143 Expired - Lifetime USD614762S1 (en) 2002-01-17 2008-12-31 Breathing mask
US29/347,618 Active USD685462S1 (en) 2002-01-17 2010-03-16 Breathing mask
US29/456,114 Active USD708735S1 (en) 2002-01-17 2013-05-29 Frame for breathing mask

Country Status (2)

Country Link
US (6) USD484237S1 (en)
AU (2) AU154125S (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD614762S1 (en) 2002-01-17 2010-04-27 Map Medizin-Technologie Gmbh Breathing mask
USD645961S1 (en) * 2004-10-01 2011-09-27 Map Medizin-Technologie Gmbh Connector tube
USD657450S1 (en) * 2009-12-18 2012-04-10 Galemed Corporation Strapless respiratory mask
USD683846S1 (en) 2011-02-25 2013-06-04 Resmed Limited Respiratory mask
USD688788S1 (en) 2011-02-25 2013-08-27 Resmed Limited Wearable positive airway pressure (PAP) delivery device
USD709180S1 (en) * 2011-09-09 2014-07-15 Resmed Limited Clip receptacle for a respiratory mask or a positive airway pressure (PAP) delivery device
USD717426S1 (en) 2002-11-08 2014-11-11 Resmed Limited Forehead pad
USD740931S1 (en) 2002-11-08 2015-10-13 Resmed Limited Forehead pad

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119693A (en) 1998-01-16 2000-09-19 Resmed Limited Forehead support for facial mask
DE20017940U1 (en) 2000-10-19 2000-12-28 MAP Medizintechnik für Arzt und Patient GmbH & Co KG, 82152 Planegg Breathing mask for supplying a breathing gas to a mask user and a derivation device for deriving breathing gas
WO2003035156A2 (en) 2001-10-22 2003-05-01 Map Medizin-Technologie Gmbh Breathing mask device and application device and frontal support device thereof
DE10201682A1 (en) * 2002-01-17 2003-07-31 Map Medizin Technologie Gmbh The breathing mask arrangement
DE10151984C5 (en) 2001-10-22 2008-07-17 Map Medizin-Technologie Gmbh Application device for a breathing mask arrangement
USD515698S1 (en) 2002-01-17 2006-02-21 Map Medizin-Technologie Gmbh Forehead support for a breathing mask
EP1545673B1 (en) 2002-09-06 2013-12-18 ResMed Limited Forehead pad for respiratory mask
US7503327B2 (en) 2003-04-10 2009-03-17 Resmed Limited Mask with integral cushion and forehead piece
EP1624919B1 (en) 2003-05-02 2014-01-29 ResMed Limited A mask system
USD567936S1 (en) 2003-05-05 2008-04-29 Resmed Limited Portion of a mask
USD493885S1 (en) 2003-05-05 2004-08-03 Resmed Limited Full face mask
AU2004201915B2 (en) * 2003-05-05 2011-06-02 Resmed Limited Forehead Support for Facial Mask
EP1765443B1 (en) 2004-06-16 2019-01-02 ResMed Limited Respiratory mask assembly with a pivotable forehead support that can be moved to accommodate facial cushions having different depths
US8220459B2 (en) 2005-01-12 2012-07-17 Resmed Limited Cushion for patient interface
USD539901S1 (en) 2005-05-04 2007-04-03 Resmed Limited Nasal mask
NZ565507A (en) 2005-10-14 2011-06-30 Resmed Ltd Mask with cushion having lip which in use deflects against frame of mask
NZ701505A (en) 2005-10-25 2016-06-24 Resmed Ltd Interchangeable mask assembly
USD586458S1 (en) 2006-04-07 2009-02-10 Resmed Limited Respiratory mask
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
NZ589685A (en) 2007-04-19 2012-06-29 Resmed Ltd Cushion for patient breathing interface with variable density foam supported membrane
US11331447B2 (en) 2008-03-04 2022-05-17 ResMed Pty Ltd Mask system with snap-fit shroud
NZ765880A (en) 2008-03-04 2022-04-29 ResMed Pty Ltd Mask system
USD755973S1 (en) * 2015-06-25 2016-05-10 The Gym Guy Llc Anaerobic cardio trainer
USD858749S1 (en) 2016-08-06 2019-09-03 Stephen P Konrad Mouth-held filter

Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD322318S (en) 1988-09-30 1991-12-10 Baxter Centre For Medical Research Pty. Limited Nasal manifold for treatment of snoring sickness
USD402755S (en) 1997-02-25 1998-12-15 Resmed Limited Combined nasal mask shell and cushion
WO1999058181A1 (en) 1998-05-14 1999-11-18 Joseph Goldstein Nasal air delivery apparatus
US6044844A (en) 1996-12-02 2000-04-04 Resmed Limited Mask and harness assembly
USD428987S (en) 1997-02-25 2000-08-01 Resmed Limited Nasal mask shell
USD439326S1 (en) 1999-05-31 2001-03-20 Mpv-Truma Gesellschaft Fuer Medizintechnische Produkte Mbh Nasal respiration mask
USD443355S1 (en) 1999-06-18 2001-06-05 Resmed Limited Nasal respiratory mask shell and forehead support assembly
WO2001097892A1 (en) 2000-06-19 2001-12-27 Australian Centre For Advanced Medical Technology Ltd Mask
USD458365S1 (en) 1999-08-10 2002-06-04 Respironics, Inc. Nasal mask
USD468823S1 (en) 2001-09-25 2003-01-14 Resmed Limited Nasal mask
US20030034034A1 (en) 1999-06-18 2003-02-20 Resmed Limited Forehead support for facial mask
US20030062048A1 (en) 2001-06-14 2003-04-03 Gradon Lewis George Breathing assistance apparatus
US20030075180A1 (en) 2001-09-07 2003-04-24 Milind Raje Mask assembly
US6561190B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
US6581602B2 (en) 1996-07-26 2003-06-24 Resmed Limited Nasal mask and mask cushion therefor
US6581594B1 (en) 2000-05-15 2003-06-24 Resmed Limited Respiratory mask having gas washout vent and gas washout vent for respiratory mask
USD484237S1 (en) 2002-01-17 2003-12-23 Map Medizin-Technologie Gmbh Modular breathing mask
US6679261B2 (en) 2000-08-24 2004-01-20 Resmed Limited Forehead support for facial mask
USD486227S1 (en) 2002-11-08 2004-02-03 Resmed Limited Forehead pad assembly
US20040045550A1 (en) 2002-01-01 2004-03-11 Bernd Lang Breathing mask arrangement and a forehead support device for same
US20040094157A1 (en) 2000-12-22 2004-05-20 Dantanarayana Muditha Pradeep Flow regulation vent
US20040112387A1 (en) 2001-09-07 2004-06-17 Lang Bernd Christoph Forehead pad for respiratory mask
US20050011522A1 (en) 2003-07-18 2005-01-20 Ric Investments, Llc Forehead pad and forehead support using same
DE10045183B4 (en) 2000-09-13 2005-01-27 Map Medizin-Technologie Gmbh Forehead support device for a breathing mask
USD502260S1 (en) 2002-01-17 2005-02-22 Map Medizin-Technologie Gmbh Forehead support and partial frame portion

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT50770B (en) 1909-06-01 1911-11-10 Abraham Elberg Trowel with adjustable handle by means of a dovetail bar and groove.
US1837591A (en) * 1930-05-08 1931-12-22 Willson Products Inc Respirator
US3521630A (en) * 1967-04-07 1970-07-28 Minnesota Mining & Mfg Respirator face mask with replaceable filter
AU133090S (en) * 1997-02-25 1998-03-06 Resmed Ltd A nasal mask shell
US6119693A (en) 1998-01-16 2000-09-19 Resmed Limited Forehead support for facial mask
AUPP949999A0 (en) 1999-03-29 1999-04-22 Resmed Limited Forehead support for facial mask II
DE10151984C5 (en) 2001-10-22 2008-07-17 Map Medizin-Technologie Gmbh Application device for a breathing mask arrangement
WO2003035156A2 (en) * 2001-10-22 2003-05-01 Map Medizin-Technologie Gmbh Breathing mask device and application device and frontal support device thereof
USD515698S1 (en) 2002-01-17 2006-02-21 Map Medizin-Technologie Gmbh Forehead support for a breathing mask
CA2469318C (en) 2002-03-22 2010-06-01 Invacare Corporation Nasal mask
AUPS192602A0 (en) * 2002-04-23 2002-05-30 Resmed Limited Nasal mask
WO2004022146A1 (en) 2002-09-06 2004-03-18 Resmed Limited Cushion for a respiratory mask assembly
USD515204S1 (en) 2002-11-08 2006-02-14 Resmed Front face portion of mask assembly
USD494675S1 (en) * 2002-11-08 2004-08-17 Resmed Limited Cushion for respiratory mask
USD545960S1 (en) 2002-11-08 2007-07-03 Resmed Limited Portion of a forehead pad assembly
USD567935S1 (en) 2002-11-08 2008-04-29 Resmed Limited Portion of forehead pad
US20040211428A1 (en) * 2003-02-28 2004-10-28 Sunrise Medical Hhg Inc. Nasal mask cushion
US7044130B2 (en) * 2003-02-28 2006-05-16 Sunrise Medical Hhg Inc. Adjustable nasal mask
USD493885S1 (en) * 2003-05-05 2004-08-03 Resmed Limited Full face mask
FR2854575B1 (en) * 2003-05-06 2005-07-29 Matisec DEVICE FOR ATTACHING A HELMET MASK
FR2861311B1 (en) * 2003-10-23 2007-08-24 Equip Medicaux Et Moyens Avece HOLDING DEVICE FOR RESPIRATORY MASK.
US7640933B1 (en) * 2004-02-13 2010-01-05 RIC Investment, Inc. Hybrid textured/polished respiratory mask seal and respiratory mask using same
USD537523S1 (en) * 2004-05-17 2007-02-27 Resmed Limited Mask shell
USD536091S1 (en) * 2004-10-01 2007-01-30 Map Medizin-Technologies Gmbh Mask
DE102005033649A1 (en) * 2005-07-19 2007-01-25 Map Medizin-Technologie Gmbh Forehead support device for a breathing mask arrangement
DE102005034143A1 (en) * 2005-07-19 2007-01-25 Map Medizin-Technologie Gmbh Face uprising structure, in particular forehead cushion for a respiratory mask device
USD619701S1 (en) * 2006-04-06 2010-07-13 Resmed Limited Respiratory mask
AU317125S (en) * 2007-03-07 2007-11-28 Teijin Ltd A mask for a respirator
USD593675S1 (en) * 2007-06-22 2009-06-02 Resmed Limited Respiratory mask
AU320814S (en) * 2007-11-26 2008-08-21 Resmed Ltd Cushion component of a respiratory mask
USD597660S1 (en) * 2008-01-15 2009-08-04 Resmed Limited Frame for a mask
USD597201S1 (en) * 2008-02-22 2009-07-28 Resmed Limited Cushion for respiratory mask
USD614761S1 (en) * 2008-02-22 2010-04-27 Resmed Limited Cushion for respiratory mask
USD597661S1 (en) * 2008-10-20 2009-08-04 Resmed Limited Respiratory mask
USD624642S1 (en) * 2008-10-22 2010-09-28 Mergenet Solutions, Inc. Mask assembly
USD639419S1 (en) * 2010-01-08 2011-06-07 Resmed Limited Cushion for respiratory mask

Patent Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD322318S (en) 1988-09-30 1991-12-10 Baxter Centre For Medical Research Pty. Limited Nasal manifold for treatment of snoring sickness
US6581602B2 (en) 1996-07-26 2003-06-24 Resmed Limited Nasal mask and mask cushion therefor
US6044844A (en) 1996-12-02 2000-04-04 Resmed Limited Mask and harness assembly
US6561190B1 (en) 1997-02-10 2003-05-13 Resmed Limited Mask and a vent assembly therefor
USD402755S (en) 1997-02-25 1998-12-15 Resmed Limited Combined nasal mask shell and cushion
USD428987S (en) 1997-02-25 2000-08-01 Resmed Limited Nasal mask shell
WO1999058181A1 (en) 1998-05-14 1999-11-18 Joseph Goldstein Nasal air delivery apparatus
USD439326S1 (en) 1999-05-31 2001-03-20 Mpv-Truma Gesellschaft Fuer Medizintechnische Produkte Mbh Nasal respiration mask
USD443355S1 (en) 1999-06-18 2001-06-05 Resmed Limited Nasal respiratory mask shell and forehead support assembly
US20030034034A1 (en) 1999-06-18 2003-02-20 Resmed Limited Forehead support for facial mask
US6532961B1 (en) 1999-06-18 2003-03-18 Resmed Limited Forehead support for facial mask
USD458365S1 (en) 1999-08-10 2002-06-04 Respironics, Inc. Nasal mask
US6581594B1 (en) 2000-05-15 2003-06-24 Resmed Limited Respiratory mask having gas washout vent and gas washout vent for respiratory mask
WO2001097892A1 (en) 2000-06-19 2001-12-27 Australian Centre For Advanced Medical Technology Ltd Mask
US6679261B2 (en) 2000-08-24 2004-01-20 Resmed Limited Forehead support for facial mask
DE10045183B4 (en) 2000-09-13 2005-01-27 Map Medizin-Technologie Gmbh Forehead support device for a breathing mask
US20040094157A1 (en) 2000-12-22 2004-05-20 Dantanarayana Muditha Pradeep Flow regulation vent
US20030089373A1 (en) 2001-06-14 2003-05-15 Gradon Lewis George Breathing assistance apparatus
US20030062048A1 (en) 2001-06-14 2003-04-03 Gradon Lewis George Breathing assistance apparatus
US20030075180A1 (en) 2001-09-07 2003-04-24 Milind Raje Mask assembly
US20040112387A1 (en) 2001-09-07 2004-06-17 Lang Bernd Christoph Forehead pad for respiratory mask
USD468823S1 (en) 2001-09-25 2003-01-14 Resmed Limited Nasal mask
US20040045550A1 (en) 2002-01-01 2004-03-11 Bernd Lang Breathing mask arrangement and a forehead support device for same
USD484237S1 (en) 2002-01-17 2003-12-23 Map Medizin-Technologie Gmbh Modular breathing mask
USD502260S1 (en) 2002-01-17 2005-02-22 Map Medizin-Technologie Gmbh Forehead support and partial frame portion
USD486227S1 (en) 2002-11-08 2004-02-03 Resmed Limited Forehead pad assembly
USD493522S1 (en) 2002-11-08 2004-07-27 Resmed Limited Portion of a forehead pad assembly
US20050011522A1 (en) 2003-07-18 2005-01-20 Ric Investments, Llc Forehead pad and forehead support using same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
U.S. Appl. No. 29/204,104, filed Apr. 2004, Guney et al.
U.S. Appl. No. 29/207,546, filed Jun. 2004, Fu et al.
U.S. Appl. No. 29/219,617, filed Dec. 2004, Lang et al.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD614762S1 (en) 2002-01-17 2010-04-27 Map Medizin-Technologie Gmbh Breathing mask
USD685462S1 (en) 2002-01-17 2013-07-02 RedMed R&D Germany GmbH Breathing mask
USD708735S1 (en) * 2002-01-17 2014-07-08 Resmed R&D Germany Gmbh Frame for breathing mask
USD717426S1 (en) 2002-11-08 2014-11-11 Resmed Limited Forehead pad
USD740931S1 (en) 2002-11-08 2015-10-13 Resmed Limited Forehead pad
USD645961S1 (en) * 2004-10-01 2011-09-27 Map Medizin-Technologie Gmbh Connector tube
USD657450S1 (en) * 2009-12-18 2012-04-10 Galemed Corporation Strapless respiratory mask
USD683846S1 (en) 2011-02-25 2013-06-04 Resmed Limited Respiratory mask
USD688788S1 (en) 2011-02-25 2013-08-27 Resmed Limited Wearable positive airway pressure (PAP) delivery device
USD706412S1 (en) 2011-02-25 2014-06-03 Resmed Limited Cushion for respiratory mask
USD709180S1 (en) * 2011-09-09 2014-07-15 Resmed Limited Clip receptacle for a respiratory mask or a positive airway pressure (PAP) delivery device
USD743842S1 (en) 2011-09-09 2015-11-24 Resmed Limited Clip for respiratory mask or positive airway pressure (PAP) delivery device

Also Published As

Publication number Publication date
USD708735S1 (en) 2014-07-08
USD484237S1 (en) 2003-12-23
USD685462S1 (en) 2013-07-02
USD614762S1 (en) 2010-04-27
AU154125S (en) 2003-12-23
AU150091S (en) 2002-12-06
USD585982S1 (en) 2009-02-03

Similar Documents

Publication Publication Date Title
USD572816S1 (en) Cushion for breathing mask
USD498527S1 (en) Humidifier assembly
USD492992S1 (en) Portion of mask assembly
USD505889S1 (en) Body of a snowmobile
USD494675S1 (en) Cushion for respiratory mask
USD578204S1 (en) Humidifier base
USD479813S1 (en) Snowmobile
USD550352S1 (en) Cushion for a breathing mask
USD585981S1 (en) Cushion for a mask
USD457023S1 (en) Chair component
USD586460S1 (en) Mask frame
USD490994S1 (en) Task chair
USD536091S1 (en) Mask
USD466712S1 (en) Chair
USD478843S1 (en) Vehicle
USD493521S1 (en) Portion of cushion clip for mask assembly
USD478297S1 (en) Console fairing for a snowmobile
USD484329S1 (en) Sleigh bed
USD486776S1 (en) Aircraft design
USD539418S1 (en) Nasal mask
USD468254S1 (en) Elements of a wakeboard tower
USD537523S1 (en) Mask shell
USD498940S1 (en) Chair
USD480998S1 (en) Vehicle mirror
USD500706S1 (en) Portion of headgear clip for a respiratory mask