Respirators

A - Human Necessities – 62 – B

Patent

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Details

A62B 9/02 (2006.01) A62B 18/10 (2006.01)

Patent

CA 2559635

An exhalation valve assembly for a respirator, said assembly comprising an upstream one-way flap valve (1) and a downstream one-way flap valve (2), both mounted within a housing (3,4,5). The valves (1,2) are 5 spaced apart to define therebetween a volume (25) which acts as a "dead space" in which a portion of the just-exhaled air will rest so that, should the upstream valve leak for any reason, any leakage air drawn back into the respirator will be taken from this just-exhaled air, and will thus not be contaminated by the ambient air.

L'invention concerne un ensemble de soupape d'expiration destiné à un respirateur, ledit ensemble comprenant un clapet de retenue unidirectionnel fonctionnant en amont (1) et un clapet de retenue unidirectionnel fonctionnant en aval (2), les deux étant montés à l'intérieur d'un boîtier (3, 4, 5). Les clapets (1, 2) sont espacés de manière à ce qu'il existe entre eux un volume (25) qui fonctionne en tant que "espace perdu" dans lequel une partie de l'air qui vient d'être expiré va rester si une fuite se produit depuis le clapet amont, quelle que soit la raison. N'importe quel air aspiré dans l'aspirateur sera pris de l'air qui vient d'être exhalé, et ne sera pas contaminé par l'air environnant.

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Profile ID: LFCA-PAI-O-1993646

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