Face mask and facepiece therefor

Details Face mask and facepiece therefor Face mask and facepiece therefor

1977-09-20

1979-08-21

Recla, Henry J.

Surgery

Truss

Pad

A62B 714

Patent

active

041649427

ABSTRACT:
A face mask comprising a substantially planar valve block having a first aperture therethrough containing an inspiratory valve and a second aperture therethrough containing an expiratory valve. The face mask also includes a support member, and a facepiece comprising a flexible, molded member having a substantially planar face of substantially constant thickness and with two apertures therein aligned with the first and second apertures of the valve block. The substantially planar face acts as a gasket between the valve block and the support member.

REFERENCES:
patent: 731973 (1903-06-01), Teter
patent: 2039234 (1936-04-01), Malcom
patent: 2444417 (1948-07-01), Bierman
patent: 3056402 (1962-10-01), Dickinson

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