GB2264646A - Breathing apparatus - Google Patents

Breathing apparatus Download PDF

Info

Publication number
GB2264646A
GB2264646A GB9202917A GB9202917A GB2264646A GB 2264646 A GB2264646 A GB 2264646A GB 9202917 A GB9202917 A GB 9202917A GB 9202917 A GB9202917 A GB 9202917A GB 2264646 A GB2264646 A GB 2264646A
Authority
GB
United Kingdom
Prior art keywords
valve
face mask
piston
breathing apparatus
exhale
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.)
Withdrawn
Application number
GB9202917A
Other versions
GB9202917D0 (en
Inventor
Michael Harvey Glynn
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.)
Sabre Safety Ltd
Original Assignee
Sabre Safety Ltd
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
Application filed by Sabre Safety Ltd filed Critical Sabre Safety Ltd
Priority to GB9202917A priority Critical patent/GB2264646A/en
Publication of GB9202917D0 publication Critical patent/GB9202917D0/en
Publication of GB2264646A publication Critical patent/GB2264646A/en
Withdrawn legal-status Critical Current

Links

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
    • A62B18/08Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10Valves
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

Breathing apparatus capable of use as either a filter respirator or positive pressure breathing apparatus comprises a face mask 1 having a filter 14 and an inhale valve mounted in one aperture in the face mask 1 and a demand valve 7 and an exhale valve 8 mounted in respective other apertures in the face mask 1. The demand valve 7 has a hose 9 for supplying breathing air under pressure to the demand valve 7 in the positive pressure mode of operation Figs. 1 and 4 (not shown), by connecting the hose connector 10 to a supply line 11 from an air cylinder 12. In the filter respirator mode Figs. 2 and 3, the hose connector 10 is disconnected from the supply line 11 and located in a parking position in a side fitting 15 where it is effective to move a piston member 19 against the action of a spring 22 and cause a cable 23 to change the position of a piston member 28 in the exhale valve 8, thereby reducing the opening pressure of the exhale valve 8 from the level appropriate for the position pressure mode to the substantially lower level appropriate for the filter respirator mode. <IMAGE>

Description

BREATHING APPARATUS This invention relates to breathing apparatus, and more particularly to breathing apparatus which may be used either as a filter respirator or as positive pressure breathing apparatus including a demand valve.
Such breathing apparatus conventionally employs a face mask having an exhale valve. However, the pressure under which the exhale valve should open is different for the two modes of operation of the breathing apparatus. In the filter respirator mode, the exhale valve should open under a lower pressure than when the breathing apparatus is operating in the positive pressure mode, for example the exhale valve may open at a positive pressure of the order of 10 mm water gauge in the filter respirator mode and at a positive pressure of the order of 30 mm water gauge in the positive pressure mode. Consequently, means needs to be provided for varying the resistance of the exhale valve when a change in the mode of operation of the breathing apparatus occurs.
In one known breathing apparatus of this kind the demand valve used in the positive pressure mode is removable from the face mask when the breathing apparatus is to be used in the filter respirator mode.
The action of fitting the demand valve into the face mask or removing the demand valve from the face mask is effective to change the resistance of the exhale valve. Such breathing apparatus is inconvenient for the user and there is the difficulty of ensuring adequate sealing of the face mask when fitting or unfitting the demand valve.
In another known -breathing apparatus of this kind the exhale valve includes a plug or cylinder which is movable manually and may be locked in position using a bayonet fitting. Such an arrangement has the disadvantage that the user must remember to change the resistance of the exhale valve manually each time that he changes the mode of operation of the breathing apparatus.
It is therefore desirable to provide breathing apparatus of this kind in which the resistance of the exhale valve is changed automatically. It has been proposed that the resistance of the exhale valve be changed pneumatically as a result of the difference in pressure within the face mask in the two means of operation, but such a pneumatic automatic means of changing the resistance of the exhale valve has not proved satisfactory.
According to the present invention there is provided: Breathing apparatus comprising: a face mask, a filter and an inhale valve both mounted to a first aperture in the face mask, a demand valve mounted to a second aperture in the face mask, the demand valve having a hose attached thereto with a connector for connecting the demand valve to a source of breathing gas under pressure, an exhale valve mounted in a third aperture in the face mask, the exhale valve including a valve member and a valve spring bearing on the valve member and providing resistance to movement of the valve member, a parking position on the face mask including a socket for receiving the hose connector, and control means responsive to the placing of the hose connector in the socket of the parking position to reduce the resistance to movement of the valve member, and operative on removal of the hose connector from the socket of the parking position to increase the resistance to movement of the valve member.
Breathing apparatus in accordance with the present invention has the advantage that the hose connector is sealed from contamination in the parking position when the breathing apparatus is being used in the filter respirator mode.
Preferably in breathing apparatus according to the present invention, the parking position comprises a side fitting on the face mask, the side fitting including the socket which has resilient retaining means therein for retaining the hose connector in the socket and the control means includes a piston movable within the side fitting, a piston return spring within the side fitting and urging the piston towards the socket and link means connected to the piston in the side fitting and to a piston member controlling the length of the valve spring in the exhale valve.
Conveniently, the link means comprises a cable movable in a sleeve, the cable being connected at one end to the piston of the side fitting and being connected at the other end to the piston member controlling the length of the exhale valve spring.
The present invention will be further understood from the following detailed description of embodiments thereof which will be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 shows a perspective view of breathing apparatus in accordance with the present invention being used in the positive pressure mode, Figure 2 is a perspective view of the breathing apparatus of Figure 1 with the compressed air cylinder disconnected and the apparatus being used in the filter respirator mode, Figure 3 is a perspective view of a preferred embodiment of a face mask for breathing apparatus according to Figure 1, but shown separate from the wearer and in the filter respirator mode, Figure 4 is an enlarged side view of part of the breathing apparatus of Figure 3 with the exhale valve and the side fitting shown in cross-section when the breathing apparatus is in positive pressure mode, and Figure 5 is a similar view to Figure 4 when the breathing apparatus is in filter respirator mode.
Referring to Figures 1 and 2 of the accompanying drawings', breathing apparatus in accordance with the present invention comprises a face mask 1 secured to the head of a wearer by a head harness comprising straps 2, 3 and 4. The face mask includes a visor 5 and a drinking facility 6 which is located in an aperture in one side wall of the face mask. A filter canister 14 is mounted in similar position in an aperture in the opposite side wall of the face mask, an inhale valve being included within the face mask for controlling inhalation in the filter respirator mode. In the positive pressure mode of operation the positive pressure within the face mask maintains the inhale valve closed, preventing inhalation through the filter respirator aperture.
A demand valve 7 is mounted to the front of the face mask 1 adjacent to an exhale valve 8. The demand valve 7 has a hose 9 attached thereto for supplying breathing air under pressure in the positive pressure mode of operation. The positive pressure mode of operation is illustrated in Figure 1 in which a hose connector 10 at the end of the hose 9 is connected to a supply line 11 from a compressed air cylinder 12 supported on the back of the wearer by a harness including shoulder straps 13.
The face mask 1 further includes a side fitting 15 which constitutes a parking position for the hose connector 10 when this is disconnected from supply line 11 and the breathing apparatus is being used in the filter respirator mode as shown in Figure 2.
The details of the control means used to increase or decrease the resistance of the exhale valve in accordance with the present invention are omitted from Figures 1 and 2 in the interests of clarity, but will be described in detail with reference to Figures 4 and 5.
Referring to Figure 3 of the accompanying drawings, there is shown a preferred modified form of the face mask of Figures 1 and 2, but including the same essential features as Figures 1 and 2. The hose 9 which is connected to the demand valve 7 has its connector 10 located in the socket of the side fitting 15, which also includes the drinking facility 6 which forms no part of the present invention.
Extending between the side fitting 15 and the exhale valve 8 is a sleeve 18 through which passes a cable (not shown) constituting a link means linking a piston 19 (Figures 4 and 5) in the side fitting 15 with a piston member 28 in the exhale valve 8.
Referring now particularly to Figure 4 of the drawings, the side fitting 15 contains a socket 20 for receiving the male hose connector 10. An 0-ring 21 constitutes resilient retaining means for engaging the hose connector and retaining it within the socket 20 as shown in Figure 5.
As shown in Figure 4 the piston 19 within the side fitting 15 is spring urged from right to left within the side fitting 15 by piston return spring 22 so that the piston 19 is in direct contact with the portion of the side fitting 15 containing socket 20.
The piston 19 is however moved to compress spring 22 by the action of inserting the male hose connector 10 in the socket 20 as shown in Figure 5.
Secured to the piston 19 is one end of a cable 23 which passes through the sleeve 18 and through the exhale valve cover, the other end of the cable 23 being secured to the centre of the piston member 28 of the exhale valve. The exhale valve comprises a valve member 29 (Figure 4) maintained on a valve seating 30 by a valve spring 31. The pressure exerted by one end of the valve spring 31 on the exhale valve member 29 is controlled by the position of the piston member 28 against which the opposite end of valve spring 31-bears.
In operation in the positive pressure mode the hose connector 10 is connected to the supply of compressed air cylinder 12 and the piston 19 is in its left-hand position within the side fitting 15 as shown in Figure 4. In this position the cable 23 linking the piston 19 with the exhale valve piston member 28 has moved the exhale valve piston member 28 to the right to compress valve spring 31 and raise the resistance of the exhale valve to the appropriate level for positive pressure mode of operation of the breathing apparatus.
On changing from the positive pressure mode to the filter respirator mode the male hose connector 10 is inserted in socket 20 to move the piston member 19 to the right and compress spring 22 as shown in Figure 5. v O-ring 21 engages in an annular recess on the male hose connector 10 to retain the hose connector 10 in the socket 20. Other means may be provided for different connectors 10.
Movement of the piston 19 to the right causes cable 23 to be moved through the sleeve 18 and draw exhale valve piston member 28 to the left, thereby permitting the exhale valve spring member 31 to expand and reduce the pressure exerted by the spring member 31 on the exhale valve member 29 which is obscured in the view of Figure 5 behind the end of the hose 9 adjacent to the hose connector 10. In consequence of the expansion of spring member 31 the exhale valve will now open under a lower pressure appropriate for the filter respirator mode of operation.
On the hose connector 10 being removed from the socket 20, spring 22 in the side fitting 15 is effective to move the piston 19 back to its left-hand position as shown in Figure 4, thereby moving the cable 23 through the sleeve 18 to restore exhale valve piston member 28 to the position shown in Figure 4 in which the exhale valve spring member 31 is compressed.
Within the cover of the exhale valve 8 a further spring 32 is provided to act on the opposite side of piston member 28 from the valve spring 31. Further spring 32 is a fail safe feature which acts to return the piston member 28 to the right-hand position in the event of a failure of the cable 23 at a time when the hose connector 10 is removed from the socket 20 for connection to the compressed air cylinder 12.

Claims (5)

1. Breathing apparatus comprising: a face mask, a filter and an inhale valve both mounted to a first aperture in the face mask, a demand valve mounted to a second aperture in the face mask, the demand valve having a hose attached thereto with a connector for connecting the demand valve to a source of breathing gas under pressure, an exhale valve mounted in a third aperture in the face mask, the exhale valve including a valve member and a valve spring bearing on the valve member and providing resistance to movement of the valve member, a parking position on the face mask including a socket for receiving the hose connector, and control means responsive to the placing of the hose connector in the socket of the parking position to reduce the resistance to movement of the valve member, and operative on removal of the hose connector from the socket of the parking position to increase the resistance to movement of the valve member.
2. Breathing apparatus according to Claim 1 wherein the parking position comprises a side fitting on the face mask, the side fitting including the socket which has resilient retaining means therein for retaining the hose connector in the socket, and wherein the control means includes a piston movable within the side fitting, a piston return spring within the side fitting and urging the piston towards the socket and link means connected to the piston in the side fitting and to a piston member controlling the length of the valve spring in the exhale valve.
3. Breathing apparatus according to Claim 2 wherein the link means comprises a cable movable in a sleeve, the cable being connected at one end to the piston of the side fitting and being connected at the other end to the piston member controlling the length of the exhale valve spring.
4. Breathing apparatus according to Claim 2 or Claim 3 wherein the exhale valve includes a further spring bearing on the piston member and urging the piston member in a direction to reduce the length of the valve spring.
5. Breathing apparatus capable of operation in a filter respirator mode or a positive pressure mode substantially as hereinbefore described with reference to the accompanying drawings.
GB9202917A 1992-02-12 1992-02-12 Breathing apparatus Withdrawn GB2264646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9202917A GB2264646A (en) 1992-02-12 1992-02-12 Breathing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9202917A GB2264646A (en) 1992-02-12 1992-02-12 Breathing apparatus

Publications (2)

Publication Number Publication Date
GB9202917D0 GB9202917D0 (en) 1992-03-25
GB2264646A true GB2264646A (en) 1993-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9202917A Withdrawn GB2264646A (en) 1992-02-12 1992-02-12 Breathing apparatus

Country Status (1)

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GB (1) GB2264646A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667171A1 (en) * 1994-02-09 1995-08-16 RICCARDO SPASCIANI S.p.A. Improved mask for breathing apparatus supplying air under pressure or not
WO1996004043A1 (en) * 1994-08-01 1996-02-15 Safety Equipment Australia Pty. Ltd. Breathing apparatus
EP0699578A1 (en) * 1994-08-30 1996-03-06 HARISAN CO., Ltd. Snorkel
US6176239B1 (en) * 1997-08-06 2001-01-23 The United States Of America As Represented By The Secretary Of The Army Advanced chemical-biological mask
WO2003090827A1 (en) * 2002-04-23 2003-11-06 Resmed Limited Ergonomic and adjustable respiratory mask assembly
US7047972B2 (en) 2002-04-23 2006-05-23 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
WO2007123585A1 (en) * 2006-04-26 2007-11-01 Mine Safety Appliances Company Devices, systems and methods for operation of breathing apparatus in multiple modes
EP2129443A1 (en) * 2007-03-23 2009-12-09 3M Innovative Properties Company Respirator flow control apparatus and method
US7743767B2 (en) 2002-04-23 2010-06-29 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
WO2010131031A2 (en) 2009-05-12 2010-11-18 Scott Health & Safety Ltd. Mask for breathing apparatus
US7874293B2 (en) 2003-02-21 2011-01-25 Resmed Limited Nasal assembly
EP2361656A1 (en) * 2010-02-26 2011-08-31 Dräger Safety AG & Co. KGaA Respirator mask
US8042542B2 (en) 2002-04-23 2011-10-25 Resmed Limited Respiratory mask assembly with magnetic coupling to headgear assembly
RU2445137C2 (en) * 2010-01-22 2012-03-20 Морозов Сергей Павлович Thermal device for disease-producing microbe and virus control
USD690003S1 (en) 2002-08-09 2013-09-17 Resmed Limited Yoked headgear
WO2014029637A2 (en) * 2012-08-21 2014-02-27 Dräger Safety AG & Co. KGaA Respirator
CN103656909A (en) * 2013-11-29 2014-03-26 航宇救生装备有限公司 Pressurizing oxygen supply mask mass flow breathing valve
EP2910280A1 (en) * 2014-02-20 2015-08-26 Draeger Safety UK Ltd. Breathing apparatus garment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111388889A (en) * 2020-04-27 2020-07-10 新疆丝路六合电气科技有限公司 Electric power safety thing allies oneself with positive pressure fire control air respirator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1522861A (en) * 1975-01-09 1978-08-31 Spasciani Spa Riccardo Breathing apparatus
GB2137888A (en) * 1983-04-06 1984-10-17 Figgie Int Inc A mask assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1522861A (en) * 1975-01-09 1978-08-31 Spasciani Spa Riccardo Breathing apparatus
GB2137888A (en) * 1983-04-06 1984-10-17 Figgie Int Inc A mask assembly

Cited By (81)

* Cited by examiner, † Cited by third party
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EP0667171A1 (en) * 1994-02-09 1995-08-16 RICCARDO SPASCIANI S.p.A. Improved mask for breathing apparatus supplying air under pressure or not
WO1996004043A1 (en) * 1994-08-01 1996-02-15 Safety Equipment Australia Pty. Ltd. Breathing apparatus
EP0699578A1 (en) * 1994-08-30 1996-03-06 HARISAN CO., Ltd. Snorkel
US6176239B1 (en) * 1997-08-06 2001-01-23 The United States Of America As Represented By The Secretary Of The Army Advanced chemical-biological mask
US8863745B2 (en) 2002-04-23 2014-10-21 Resmed Limited Respiratory mask assembly with magnetic coupling to headgear assembly
US8944058B2 (en) 2002-04-23 2015-02-03 Resmed Limited Patient interface device
US7047972B2 (en) 2002-04-23 2006-05-23 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
US11331448B2 (en) 2002-04-23 2022-05-17 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with cushion
US7487772B2 (en) 2002-04-23 2009-02-10 Resmed Limited Ergonomic and adjustable respiratory mask assembly with elbow assembly
US7597100B2 (en) 2002-04-23 2009-10-06 Resmed Limited Ergonomic and adjustable respiratory mask assembly with vent cover
US11266804B2 (en) 2002-04-23 2022-03-08 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with elbow assembly
US7743767B2 (en) 2002-04-23 2010-06-29 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
US11110244B2 (en) 2002-04-23 2021-09-07 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with elbow assembly
WO2003090827A1 (en) * 2002-04-23 2003-11-06 Resmed Limited Ergonomic and adjustable respiratory mask assembly
US10905841B2 (en) 2002-04-23 2021-02-02 ResMed Pty Ltd Ergonomic and adjustable patient interface
US7874291B2 (en) 2002-04-23 2011-01-25 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
US10814087B2 (en) 2002-04-23 2020-10-27 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with frame
US7938116B2 (en) 2002-04-23 2011-05-10 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
US10729867B2 (en) 2002-04-23 2020-08-04 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with headgear assembly
US7997267B2 (en) 2002-04-23 2011-08-16 Resmed Limited Ergonomic and adjustable respiratory mask assembly with elbow assembly
US10675429B2 (en) 2002-04-23 2020-06-09 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with elbow assembly
US8025057B2 (en) 2002-04-23 2011-09-27 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
US8042542B2 (en) 2002-04-23 2011-10-25 Resmed Limited Respiratory mask assembly with magnetic coupling to headgear assembly
US6907882B2 (en) 2002-04-23 2005-06-21 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
US10307555B2 (en) 2002-04-23 2019-06-04 ResMed Pty Ltd Ergonomic and adjustable respiratory mask assembly with cushion
US9802018B2 (en) 2002-04-23 2017-10-31 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
US9669180B2 (en) 2002-04-23 2017-06-06 Resmed Limited Ergonomic and adjustable respiratory mask assembly with elbow assembly
US9457162B2 (en) 2002-04-23 2016-10-04 Resmed Limited Ergonomic and adjustable respiratory mask assembly with headgear assembly
US8997742B2 (en) 2002-04-23 2015-04-07 Resmed Limited Ergonomic and adjustable respiratory mask assembly with cushion
US8833370B2 (en) 2002-04-23 2014-09-16 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
US8371302B2 (en) 2002-04-23 2013-02-12 Resmed Limited Ergonomic and adjustable respiratory mask assembly with frame
US8387616B2 (en) 2002-04-23 2013-03-05 Resmed Limited Ergonomic and adjustable respiratory mask assembly with elbow assembly
US9421340B2 (en) 2002-04-23 2016-08-23 Resmed Limited Ergonomic and adjustable respiratory mask assembly with cushion
US8479736B2 (en) 2002-04-23 2013-07-09 Resmed Limited Respiratory mask assembly
USD690003S1 (en) 2002-08-09 2013-09-17 Resmed Limited Yoked headgear
USD736908S1 (en) 2002-08-09 2015-08-18 Resmed Limited Headgear-to-frame connection component for respiratory mask
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
US10556084B2 (en) 2003-02-21 2020-02-11 ResMed Pty Ltd Mask assembly
US11090455B2 (en) 2003-02-21 2021-08-17 ResMed Pty Ltd Nasal assembly
US11583652B2 (en) 2003-02-21 2023-02-21 ResMed Pty Ltd Mask assembly
US11497876B2 (en) 2003-02-21 2022-11-15 ResMed Pty Ltd Mask assembly
US11420004B2 (en) 2003-02-21 2022-08-23 ResMed Pty Ltd Mask assembly
US11000664B2 (en) 2003-02-21 2021-05-11 ResMed Pty Ltd Mask assembly
US8312881B2 (en) 2003-02-21 2012-11-20 Resmed Limited Nasal assembly
US8985117B2 (en) 2003-02-21 2015-03-24 Resmed Limited Nasal assembly
US7874293B2 (en) 2003-02-21 2011-01-25 Resmed Limited Nasal assembly
US11433207B2 (en) 2003-02-21 2022-09-06 ResMed Pty Ltd Mask assembly
US10561813B2 (en) 2003-02-21 2020-02-18 Resmed Pty Ltd. Mask assembly
US8042546B2 (en) 2003-02-21 2011-10-25 Resmed Limited Nasal assembly
US10518058B2 (en) 2003-02-21 2019-12-31 ResMed Pty Ltd Mask assembly
US8424530B2 (en) 2003-02-21 2013-04-23 Resmed Limited Nasal assembly
US11077276B2 (en) 2003-02-21 2021-08-03 ResMed Pty Ltd Mask assembly
US8312883B2 (en) 2003-02-21 2012-11-20 Resmed Limited Nasal assembly
US8286636B2 (en) 2003-02-21 2012-10-16 Resmed Limited Nasal assembly
US8186352B2 (en) 2003-02-21 2012-05-29 Resmed Limited Nasal assembly
US7900635B2 (en) 2003-02-21 2011-03-08 Resmed Limited Nasal assembly
US11103666B2 (en) 2003-02-21 2021-08-31 ResMed Pty Ltd Mask assembly
CN101426555B (en) * 2006-04-26 2012-03-21 矿井安全装置公司 Devices, systems and methods for operation of breathing apparatuses in multiple modes
US7762252B2 (en) 2006-04-26 2010-07-27 Mine Safety Appliances Company Devices, systems and methods for operation of breathing apparatuses in multiple modes
WO2007123585A1 (en) * 2006-04-26 2007-11-01 Mine Safety Appliances Company Devices, systems and methods for operation of breathing apparatus in multiple modes
AU2007241149B2 (en) * 2006-04-26 2011-06-16 Msa Technology, Llc Devices, systems and methods for operation of breathing apparatus in multiple modes
US10137320B2 (en) 2007-03-23 2018-11-27 3M Innovative Properties Company Respirator flow control apparatus and method
EP3326697A1 (en) * 2007-03-23 2018-05-30 3M Innovative Properties Company Respirator flow control apparatus and method
US11130008B2 (en) 2007-03-23 2021-09-28 3M Innovative Properties Company Respirator flow control apparatus and method
EP2129443A1 (en) * 2007-03-23 2009-12-09 3M Innovative Properties Company Respirator flow control apparatus and method
EP2129443A4 (en) * 2007-03-23 2015-04-01 3M Innovative Properties Co Respirator flow control apparatus and method
WO2010131031A2 (en) 2009-05-12 2010-11-18 Scott Health & Safety Ltd. Mask for breathing apparatus
GB2500341A (en) * 2009-05-12 2013-09-18 Scott Health & Safety Ltd Breathing mask with exhalation valve having two operational modes
GB2500341B (en) * 2009-05-12 2014-01-22 Scott Health & Safety Ltd Mask for breathing apparatus
RU2445137C2 (en) * 2010-01-22 2012-03-20 Морозов Сергей Павлович Thermal device for disease-producing microbe and virus control
US8631794B2 (en) 2010-02-26 2014-01-21 Dräger Safety AG & Co. KGaA Gas mask
EP2361656A1 (en) * 2010-02-26 2011-08-31 Dräger Safety AG & Co. KGaA Respirator mask
WO2014029637A3 (en) * 2012-08-21 2014-11-27 Dräger Safety AG & Co. KGaA Respirator
GB2519926A (en) * 2012-08-21 2015-05-06 Draeger Safety Ag & Co Kgaa Respirator
GB2519926B (en) * 2012-08-21 2019-02-13 Draeger Safety Ag & Co Kgaa Breathing apparatus
US10369322B2 (en) 2012-08-21 2019-08-06 Dräger Safety AG & Co. KGaA Respirator
WO2014029637A2 (en) * 2012-08-21 2014-02-27 Dräger Safety AG & Co. KGaA Respirator
CN103656909B (en) * 2013-11-29 2016-08-31 航宇救生装备有限公司 Pressure oxygen mask big flow outlet valve
CN103656909A (en) * 2013-11-29 2014-03-26 航宇救生装备有限公司 Pressurizing oxygen supply mask mass flow breathing valve
EP2910280A1 (en) * 2014-02-20 2015-08-26 Draeger Safety UK Ltd. Breathing apparatus garment

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)