Face mask that has a filtered exhalation valve

Details Face mask that has a filtered exhalation valve Face mask that has a filtered exhalation valve

A - Human Necessities

62

B

A62B 18/10 (2006.01) A41D 13/11 (2006.01)

Patent

CA 2337434

A filtering face mask that covers at least the nose and mouth of a wearer and that includes an exhalation valve. The exhalation valve opens in response to increased pressure when the wearer exhales to allow the exhaled air to be rapidly purged from the mask interior. An exhale filter element is placed in one of several locations in the exhale flow stream to remove contaminants from the exhaled air. The face mask is beneficial in that it provides comfort to the wearer by allowing warm, moist, high-CO2-content air to be rapidly evacuated from the mask interior through the valve and also protects the wearer from splash fluids and polluted air while at the same time protecting other persons or things from being exposed to contaminants in the exhale flow stream.

La présente invention concerne un masque facial filtrant couvrant au moins le nez et la bouche d'un utilisateur et qui comprend une soupape d'expiration. La soupape d'expiration s'ouvre en réponse à une augmentation de pression lorsque l'utilisateur expire, permettant à l'air exhalé d'être rapidement chassé de l'intérieur du masque. Un élément de filtration d'expiration placé à l'un des nombreux emplacements sur le parcours d'écoulement d'expiration permet d'éliminer des contaminants de l'air expiré. Le masque facial est bénéfique en raison du confort qu'il apporte à l'utilisateur en permettant une évacuation rapide, de l'intérieur du masque, d'un air chaud, humide et chargé en CO¿2?, à travers la soupape, mais aussi parce qu'il permet à l'utilisateur d'être protégé d'éclaboussures et d'air vicié tout en empêchant d'autres personnes ou objets d'être exposés à de contaminants contenus dans l'air expiré.

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