Face mask with lip, fold, and resilient spring means to improve seal
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United States of America Patent
Stats
-
Sep 27, 1994
Grant Date -
N/A
app pub date -
Oct 1, 1992
filing date -
Oct 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The equipment, for use by a pilot, is intended to provide the wearer with breathing gas under a pressure greater than ambient pressure. It comprises a mask having a rigid shell provided with fastening straps for holding the mask on the head, with a coupling for feeding breathing gas under pressure, and with a face cover of elastomer material terminated by an internal sealing lip for pressing against the face. The lip is connected to a front portion of the face cover that is secured to the shell by at least one thin deformable fold. Resilient elements are provided along the fold to exert a force that varies little with the amount of deformation and press the lip against the face.
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