EP 0702983 A1 19960327 - Valve for breathing apparatus
Title (en)
Valve for breathing apparatus
Title (de)
Ventil für Atmungsgerät
Title (fr)
Soupape pour appareil respiratoire
Publication
Application
Priority
GB 9419144 A 19940922
Abstract (en)
Breathing apparatus, particularly emergency escape breathing apparatus, comprising a hood (1) of flexible material for covering the user's head, an ori-nasal mask (2) mounted within the hood for covering the user's nose and mouth and a valve assembly (6) for controlling the supply of breathable gas from a supply (not shown) to the ori-nasal mask (2). The valve assembly includes a porous disc (14) which, in use, creates a pressure differential which acts to open a normally closed connection via a passage (10) between the interior of the hood (1) and the ori-nasal mask (2). This allows the user to obtain gas for breathing both direct from the supply via passage (20) and from the interior of the hood via passage (10). When however the pressure differential falls below a predetermined value, such as when the supply starts to run out, the pressure of a spring (15) overcomes the pressure differential and the passage (10) is cut off providing an immediate warning to the user that the supply is shortly to expire. Thereafter, breathing is solely from the supply or optionally in addition via restricted apertures (22) from the hood (1). <IMAGE>
IPC 1-7
IPC 8 full level
A62B 9/02 (2006.01); A62B 18/10 (2006.01)
CPC (source: EP)
A62B 9/02 (2013.01); A62B 18/10 (2013.01)
Citation (search report)
- [A] EP 0470791 A2 19920212 - SABRE SAFETY LTD [GB]
- [A] FR 2649016 A1 19910104 - DRAEGERWERK AG [DE]
- [A] EP 0130283 A2 19850109 - AUERGESELLSCHAFT GMBH [DE]
- [A] GB 2244433 A 19911204 - CAMBERLEY RUBBER MOULDINGS LIM [GB]
- [A] US 4007758 A 19770215 - GRAY ROBERT E, et al
- [A] US 2966917 A 19610103 - AARON BLOOM
- [A] GB 2143137 A 19850206 - FIGGIE INT INC
- [A] EP 0325959 A2 19890802 - BILSOM SENTRY LTD [GB]
Designated contracting state (EPC)
DE DK ES FR GB IT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 95306695 A 19950921; GB 9419144 A 19940922