CA2134764A1 - Unidirectional Fluid Valve - Google Patents
Unidirectional Fluid ValveInfo
- Publication number
- CA2134764A1 CA2134764A1 CA 2134764 CA2134764A CA2134764A1 CA 2134764 A1 CA2134764 A1 CA 2134764A1 CA 2134764 CA2134764 CA 2134764 CA 2134764 A CA2134764 A CA 2134764A CA 2134764 A1 CA2134764 A1 CA 2134764A1
- Authority
- CA
- Canada
- Prior art keywords
- flexible flap
- seal ridge
- force
- exposed
- seal
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing 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
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing 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
- A62B18/02—Masks
- A62B18/025—Halfmasks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0402—Cleaning, repairing, or assembling
- Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Check Valves (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Filtering Materials (AREA)
Abstract
An exhalation valve (14) for a filtering face mask (10) has a flexible flap (24) that makes contact with a curved seal ridge (30) of a valve seat (26) when the valve (14) is in the closed position. The curvature of the seal ridge (30) corresponds to a deformation curve exhibited by the flexible flap (24) when secured as a cantilever at one end and exposed at its free portion to a uniform force and/or a force of at least the weight of the free portion of the flexible flap. A seal ridge curvature corresponding to a flexible flap exposed to uniform force allows the flexible flap (24) to exert a generally uniform pressure on the seal ridge to provide a good seal. A seal ridge curvature corresponding to a flexible flap exposed to a force of at least the weight of the flap's free portion allows the flexible flap (24) to be held in an abutting relationship to the seal ridge (30) under any static orientation by a minimum amount of force, thereby providing a face mask (10) with an extraordinary low pressure drop during an exhalation.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89128992A | 1992-05-29 | 1992-05-29 | |
US07/891289 | 1992-05-29 | ||
US07/981244 | 1992-11-25 | ||
US07/981,244 US5325892A (en) | 1992-05-29 | 1992-11-25 | Unidirectional fluid valve |
PCT/US1993/003797 WO1993024181A1 (en) | 1992-05-29 | 1993-04-21 | Unidirectional fluid valve |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2134764A1 true CA2134764A1 (en) | 1993-12-09 |
CA2134764C CA2134764C (en) | 1999-04-27 |
Family
ID=27128974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2134764 Expired - Lifetime CA2134764C (en) | 1992-05-29 | 1993-04-21 | Unidirectional fluid valve |
Country Status (9)
Country | Link |
---|---|
US (4) | US6854463B2 (en) |
EP (1) | EP0674535B1 (en) |
JP (2) | JP3359033B2 (en) |
AU (1) | AU665082B2 (en) |
BR (1) | BR9306447A (en) |
CA (1) | CA2134764C (en) |
DE (1) | DE69312509T2 (en) |
MX (1) | MX9302879A (en) |
WO (1) | WO1993024181A1 (en) |
Families Citing this family (105)
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US7849856B2 (en) | 2001-06-25 | 2010-12-14 | 3M Innovative Properties Company | Respirator valve |
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US7934497B1 (en) * | 2001-11-19 | 2011-05-03 | The United States Of America As Represented By The Secretary Of The Army | Modular helmet-mask assembly |
US7028689B2 (en) | 2001-11-21 | 2006-04-18 | 3M Innovative Properties Company | Filtering face mask that uses an exhalation valve that has a multi-layered flexible flap |
US20040261795A1 (en) * | 2002-08-28 | 2004-12-30 | Brunell Robert A. | Respirator mask and valve |
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US7328700B2 (en) * | 2003-03-07 | 2008-02-12 | 3M Innovative Properties | Respiratory system and method of use |
US7188622B2 (en) * | 2003-06-19 | 2007-03-13 | 3M Innovative Properties Company | Filtering face mask that has a resilient seal surface in its exhalation valve |
US7650884B2 (en) | 2003-11-21 | 2010-01-26 | 3M Innovative Properties Company | Respiratory facepiece and method of making a facepiece using separate molds |
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US7320722B2 (en) * | 2004-10-29 | 2008-01-22 | 3M Innovative Properties Company | Respiratory protection device that has rapid threaded clean air source attachment |
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US7503326B2 (en) * | 2005-12-22 | 2009-03-17 | 3M Innovative Properties Company | Filtering face mask with a unidirectional valve having a stiff unbiased flexible flap |
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-
1993
- 1993-04-21 JP JP52032293A patent/JP3359033B2/en not_active Expired - Lifetime
- 1993-04-21 BR BR9306447A patent/BR9306447A/en not_active IP Right Cessation
- 1993-04-21 WO PCT/US1993/003797 patent/WO1993024181A1/en active IP Right Grant
- 1993-04-21 DE DE1993612509 patent/DE69312509T2/en not_active Expired - Lifetime
- 1993-04-21 AU AU41120/93A patent/AU665082B2/en not_active Expired
- 1993-04-21 CA CA 2134764 patent/CA2134764C/en not_active Expired - Lifetime
- 1993-04-21 EP EP19930910731 patent/EP0674535B1/en not_active Expired - Lifetime
- 1993-05-18 MX MX9302879A patent/MX9302879A/en unknown
-
1994
- 1994-05-11 US US08/240,877 patent/US6854463B2/en not_active Expired - Fee Related
-
1995
- 1995-05-23 US US08/448,088 patent/US5509436A/en not_active Expired - Lifetime
-
2001
- 2001-04-18 US US09/837,714 patent/US7311104B2/en not_active Expired - Fee Related
- 2001-04-18 US US09/837,800 patent/US6843248B2/en not_active Expired - Fee Related
-
2002
- 2002-03-06 JP JP2002060002A patent/JP3907500B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07506751A (en) | 1995-07-27 |
EP0674535A1 (en) | 1995-10-04 |
US6854463B2 (en) | 2005-02-15 |
CA2134764C (en) | 1999-04-27 |
US6843248B2 (en) | 2005-01-18 |
JP3359033B2 (en) | 2002-12-24 |
AU4112093A (en) | 1993-12-30 |
AU665082B2 (en) | 1995-12-14 |
DE69312509D1 (en) | 1997-08-28 |
BR9306447A (en) | 1998-06-30 |
EP0674535B1 (en) | 1997-07-23 |
US20020170563A1 (en) | 2002-11-21 |
JP3907500B2 (en) | 2007-04-18 |
MX9302879A (en) | 1993-11-01 |
JP2002253689A (en) | 2002-09-10 |
US20020185133A1 (en) | 2002-12-12 |
US20030084902A1 (en) | 2003-05-08 |
WO1993024181A1 (en) | 1993-12-09 |
US5509436A (en) | 1996-04-23 |
DE69312509T2 (en) | 1998-02-26 |
US7311104B2 (en) | 2007-12-25 |
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EEER | Examination request |