RESPIRATORS

An exhalation valve assembly for a respirator, said assembly comprising an upstream one-way flap valve and a downstream one-way flap valve, both mounted within a housing. The valves are 5 spaced apart to define therebetween a volume which acts as a 'dead space' in which a portion of the ju...

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Bibliographic Details
Main Author SUTTON, ROBERT CHARLES
Format Patent
LanguageEnglish
French
Published 29.09.2005
Subjects
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
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Summary:An exhalation valve assembly for a respirator, said assembly comprising an upstream one-way flap valve and a downstream one-way flap valve, both mounted within a housing. The valves are 5 spaced apart to define therebetween a volume 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.
Bibliography:Application Number: CA20052559635