Supplied air helmet having face seal with differentiated...

Details Supplied air helmet having face seal with differentiated... Supplied air helmet having face seal with differentiated...

A - Human Necessities

62

B

A62B 18/04 (2006.01)

Patent

CA 2586132

A supplied air helmet (10) comprises a visor (14) and a face seal (12) that is secured to the visor. The face seal (12) includes a sealing member (18) and a frame member (16). The sealing member (18) extends radially inward from the frame member (16) and has first and second regions of permeability (20 and 22). The second region (22) has greater permeability than the first region (20). The use of a face seal (12) that has differentiated permeability allows for a controlled flow of air through the interior of the supplied air helmet (10).

Casque à adduction d~air (10) comprenant une visière (14) et un joint d~étanchéité facial (12) qui est fixé à la visière. Le joint d~étanchéité facial (12) inclut un élément d~étanchéité (18) et un élément d~armature (16). L~élément d~étanchéité (18) s~allonge radialement vers l~intérieur de l~élément d~armature (16) et comporte une première et une deuxième régions de perméabilité (20 et 22). La deuxième région (22) a une perméabilité plus grande que la première région (20). L~utilisation d~un joint d~étanchéité facial (12) qui a une perméabilité différenciée permet d~obtenir un flux d~air régulé à travers l~intérieur du casque à adduction d~air (10).

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