FI831691A0 - FOERBAETTRINGAR BEROERANDE ANDNINGSSKYDD - Google Patents
FOERBAETTRINGAR BEROERANDE ANDNINGSSKYDDInfo
- Publication number
- FI831691A0 FI831691A0 FI831691A FI831691A FI831691A0 FI 831691 A0 FI831691 A0 FI 831691A0 FI 831691 A FI831691 A FI 831691A FI 831691 A FI831691 A FI 831691A FI 831691 A0 FI831691 A0 FI 831691A0
- Authority
- FI
- Finland
- Prior art keywords
- facepiece
- inlet
- filter means
- pump unit
- air
- Prior art date
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
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)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Dc Digital Transmission (AREA)
- Electroluminescent Light Sources (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8214007 | 1982-05-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
FI831691A0 true FI831691A0 (en) | 1983-05-13 |
FI831691L FI831691L (en) | 1983-11-14 |
Family
ID=10530349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI831691A FI831691L (en) | 1982-05-13 | 1983-05-13 | FOERBAETTRINGAR BEROERANDE ANDNINGSSKYDD |
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) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4590951A (en) * | 1983-06-07 | 1986-05-27 | Racal Safety Limited | 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 |
DE68909707T2 (en) * | 1988-07-26 | 1994-02-03 | Racal Health & Safety Ltd | Respiratory Equipment. |
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 |
WO2016157159A1 (en) * | 2015-04-03 | 2016-10-06 | Microsfere Pte. Ltd. | Respiratory masks, systems and methods |
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)
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 |
-
1983
- 1983-04-27 AU AU13994/83A patent/AU554194B2/en not_active Expired
- 1983-05-03 EP EP83302484A patent/EP0094757B1/en not_active Expired
- 1983-05-03 AT AT83302484T patent/ATE28572T1/en not_active IP Right Cessation
- 1983-05-03 DE DE8383302484T patent/DE3372713D1/en not_active Expired
- 1983-05-05 ZA ZA833204A patent/ZA833204B/en unknown
- 1983-05-11 NO NO831677A patent/NO831677L/en unknown
- 1983-05-13 JP JP58082896A patent/JPS58209362A/en active Pending
- 1983-05-13 FI FI831691A patent/FI831691L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE3372713D1 (en) | 1987-09-03 |
AU554194B2 (en) | 1986-08-14 |
FI831691L (en) | 1983-11-14 |
JPS58209362A (en) | 1983-12-06 |
ATE28572T1 (en) | 1987-08-15 |
EP0094757A2 (en) | 1983-11-23 |
EP0094757B1 (en) | 1987-07-29 |
EP0094757A3 (en) | 1984-05-16 |
NO831677L (en) | 1983-11-14 |
ZA833204B (en) | 1984-01-25 |
AU1399483A (en) | 1983-11-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |
Owner name: RACAL SAFETY LIMITED |