Filtration mask

Details Filtration mask Filtration mask

A - Human Necessities

62

B

A62B 17/04 (2006.01) A62B 18/02 (2006.01)

Patent

CA 2700845

A filtration mask has a collapsible air guide and two filter supports connected at a hinge. The filter supports are movable between a storage position and a deployment position in which the angle between the filter supports being less in the deployment position than in the storage position. In an aspect of this invention, the filter support each have a recess at the hinging edge, and an exhale valve communicating with the air guide is mounted in the recess. In another aspect the exhale valve is connected to the filter supports by a flexible membrane. In a third aspect the air guide is formed by hinged panels.

L'invention concerne un masque filtrant qui comporte un guide d'air pliable et deux porte-filtres reliés au niveau d'une charnière. Les porte-filtres sont mobiles entre une position de stockage et une position déployée, l'angle entre les porte-filtres étant plus petit dans la position déployée que dans la position de stockage. Selon un aspect de cette invention, les porte-filtres présentent chacun une cavité au niveau du bord de charnière, et un clapet d'expiration communiquant avec le guide d'air est monté dans la cavité. Selon un autre aspect, le clapet d'expiration est relié aux porte-filtres par une membrane souple. Selon un troisième aspect, le guide d'air est formé par des panneaux articulés.

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