Anti-suffocation means for aircraft breathing mask

Details Anti-suffocation means for aircraft breathing mask Anti-suffocation means for aircraft breathing mask

A - Human Necessities

62

B

137/1.5

A62B 7/00 (2006.01) A62B 9/00 (2006.01)

Patent

CA 1076916

ANTI-SUFFOCATION MEANS FOR AN AIRCRAFT BREATHING MASK ABSTRACT OF THE DISCLOSURE An emergency breathing system has an anti-suffocation valve located in a housing between a source of breathable fluid and a distri- bution mask. The housing has a chamber which is connected to the dis- tribution mask and an opening which connects the chamber with the sur- rounding environment. The anti-suffocation valve responds to an inhala- tion demand of a recipient to allow air from the surrounding environment to enter the chamber and satisfy the inhalation demand of a recipient to allow air from the surrounding environment to enter the chamber and satisfy the inhalation demand. A hydrophobic filter surrounds the opening and prevents the entry of any water present in the surrounding environment into the chamber which could inhibit cyclic inhalation of breathable fluid by the recipient.

281593

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