Breathing mask apparatus

Details Breathing mask apparatus Breathing mask apparatus

1991-08-12

1993-08-17

Burr, Edgar S.

Surgery

Respiratory method or device

Face mask covering a breathing passage

12820623, A62B 1802

Patent

active

052359727

ABSTRACT:
A breathing mask includes a gate structure cooperative with the transparent face plate of the associated gas mask to halt the flow of air through an associated breathing tube to minimize wastage of such air when not in use. The viewing face plate is hingedly mounted within a framework, and when latched in association with a support frame, effects opening of a gate structure within an air conduit, wherein opening of the viewing face plate effects closure of the gate within the conduit.

REFERENCES:
patent: 2910063 (1959-10-01), Monroe et al.
patent: 2996722 (1961-08-01), Jacobs
patent: 3259127 (1966-07-01), Klinger et al.
patent: 3315673 (1967-04-01), Mordon, Jr.
patent: 3323135 (1967-06-01), Miller
patent: 4250877 (1981-02-01), Owens et al.
patent: 4328798 (1982-05-01), Isaacson
patent: 4648394 (1987-03-01), Wise

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