AU554194B2 - Respirator - Google Patents

Respirator

Info

Publication number
AU554194B2
AU554194B2 AU13994/83A AU1399483A AU554194B2 AU 554194 B2 AU554194 B2 AU 554194B2 AU 13994/83 A AU13994/83 A AU 13994/83A AU 1399483 A AU1399483 A AU 1399483A AU 554194 B2 AU554194 B2 AU 554194B2
Authority
AU
Australia
Prior art keywords
facepiece
inlet
filter means
pump unit
air
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
Application number
AU13994/83A
Other versions
AU1399483A (en
Inventor
David Brian Edward
Richard Kevin O'connor
Raymond Odell
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.)
3M Co
Original Assignee
Racal 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10530349&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU554194(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Racal Safety Ltd filed Critical Racal Safety Ltd
Publication of AU1399483A publication Critical patent/AU1399483A/en
Application granted granted Critical
Publication of AU554194B2 publication Critical patent/AU554194B2/en
Assigned to MINNESOTA MINING AND MANUFACTURING COMPANY reassignment MINNESOTA MINING AND MANUFACTURING COMPANY Alteration of Name(s) in Register under S187 Assignors: RACAL SAFETY LTD.
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

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
    • A62B18/006—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 with pumps for forced ventilation

Abstract

The present invention relates to improvements in power assisted positive pressure respirators for use in contaminated atmospheres. The respirator comprises a facepiece 1 having an inlet 3 connected to a pump unit 5 for supplying air to the facepiece which has been filtered by filter means 11 connected to the pump unit inlet. The facepiece is also provided with an outlet provided witha one-way valve 2 which is biased to its closed position and is openable when a predetermined pressure above atmospheric pressure is established within the facepiece. To maximise use of the filter means 11, a one-way inlet valve 13 is provided intermediate the pump unit 5 and the facepiece 1, conveniently at the inlet to the facepiece, which is closed during exhalation by the wearer to thereby cause the pump to be placed in a condition in which, although it continues to operate, no or substantially no air is moved thereby, so that during this period, no or substantially no air is drawn through the filter means 11.
AU13994/83A 1982-05-13 1983-04-27 Respirator Expired AU554194B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8214007 1982-05-13
GB8214007 1982-05-13

Publications (2)

Publication Number Publication Date
AU1399483A AU1399483A (en) 1983-11-17
AU554194B2 true AU554194B2 (en) 1986-08-14

Family

ID=10530349

Family Applications (1)

Application Number Title Priority Date Filing Date
AU13994/83A Expired AU554194B2 (en) 1982-05-13 1983-04-27 Respirator

Country Status (8)

Country Link
EP (1) EP0094757B1 (en)
JP (1) JPS58209362A (en)
AT (1) ATE28572T1 (en)
AU (1) AU554194B2 (en)
DE (1) DE3372713D1 (en)
FI (1) FI831691L (en)
NO (1) NO831677L (en)
ZA (1) ZA833204B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU612876B2 (en) * 1988-07-26 1991-07-18 Minnesota Mining And Manufacturing Company Breathing apparatus

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141348B (en) * 1983-06-07 1986-06-18 Racal Safety Ltd Breathing apparatus
AU4275385A (en) * 1984-06-06 1985-12-12 Racal Safety Ltd. Respirators fan-assisted
DE3523097A1 (en) * 1984-11-15 1986-05-22 Gesellschaft für Gerätebau mbH, 4600 Dortmund RESPIRATORY MASK
GB8608113D0 (en) * 1986-04-03 1986-05-08 Racal Safety Ltd Breathing apparatus
FI80606C (en) * 1987-10-05 1990-07-10 Kemira Oy FOERFARANDE FOER REGLERING AV LUFTMAONGDEN SOM MATAS IN I EN GASMASK SAMT EN GASMASK SOM GENOMFOER DENNA FOERFARANDE.
GB2215615B (en) * 1988-03-21 1991-12-18 Sabre Safety Ltd Breathing apparatus
DE3908057C2 (en) * 1989-03-13 1997-03-20 Kemira Oy Method of regulating the amount of air supplied to a gas mask and gas mask to which this method is applied
US5372130A (en) * 1992-02-26 1994-12-13 Djs&T Limited Partnership Face mask assembly and method having a fan and replaceable filter
FI100307B (en) * 1994-02-25 1997-11-14 Kemira Safety Oy A method for adjusting the amount of air supplied to a gas mask and Amari as a gas
US20040182394A1 (en) 2003-03-21 2004-09-23 Alvey Jeffrey Arthur Powered air purifying respirator system and self contained breathing apparatus
US7647927B2 (en) 2003-08-22 2010-01-19 Wilcox Industries Corp. Self-contained breathing system
CN104248800A (en) * 2013-06-25 2014-12-31 卢献斌 Portable air purifier for mask
CN104225829A (en) * 2014-07-17 2014-12-24 艾尔康居（北京）科技有限公司 Active air feeding type dustproof mask
JP2018512518A (en) * 2015-04-03 2018-05-17 マイクロスフェア ピーティーイー． リミテッド Respirator, system and method
CN116077848B (en) * 2023-02-27 2023-10-20 江苏海拓科技有限公司 Double-deck floating filter type respirator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR785223A (en) * 1934-09-21 1935-08-05 Cela Holding S A Portable gas protection device
CH202373A (en) * 1936-06-11 1939-01-15 Bez Casimir Respiratory.
FR1037477A (en) * 1951-05-24 1953-09-17 Clean air inhaler device for painting, sandblasting and other work
FR1320829A (en) * 1962-01-30 1963-03-15 Houilleres Bassin Du Nord Autonomous aerator for breathing in polluted atmosphere
GB2032284B (en) * 1978-10-02 1982-11-10 Racal Safety Ltd Breathing apparatus
GB2058577A (en) * 1979-09-25 1981-04-15 Racal Safety Ltd Improvements in and relating to breathing apparatus
US4430995A (en) * 1981-05-29 1984-02-14 Hilton Joseph R Power assisted air-purifying respirators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU612876B2 (en) * 1988-07-26 1991-07-18 Minnesota Mining And Manufacturing Company Breathing apparatus

Also Published As

Publication number Publication date
ATE28572T1 (en) 1987-08-15
FI831691L (en) 1983-11-14
EP0094757B1 (en) 1987-07-29
ZA833204B (en) 1984-01-25
EP0094757A2 (en) 1983-11-23
FI831691A0 (en) 1983-05-13
EP0094757A3 (en) 1984-05-16
AU1399483A (en) 1983-11-17
JPS58209362A (en) 1983-12-06
DE3372713D1 (en) 1987-09-03
NO831677L (en) 1983-11-14

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired