Face mask with lip, fold, and resilient spring means to improve

Details Face mask with lip, fold, and resilient spring means to improve Face mask with lip, fold, and resilient spring means to improve

1992-10-01

1994-09-27

Asher, Kimberly L.

Surgery

Respiratory method or device

Face mask covering a breathing passage

12820711, 12820124, A62B 1808, A62B 1704

Patent

active

053499492

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.

REFERENCES:
patent: 1070986 (1913-08-01), Richter
patent: 1193002 (1916-08-01), Engstad
patent: 1281937 (1918-10-01), Gamble
patent: 2641253 (1953-06-01), Engelder
patent: 2706983 (1955-04-01), Matheson et al.
patent: 4069516 (1978-01-01), Watkins
patent: 4907584 (1990-03-01), McGinnis

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