Smoke-proof mask

Details Smoke-proof mask Smoke-proof mask

1992-12-07

1993-09-14

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820522, 12820712, A62B 1802, A62B 700, A62B 900, A62B 1810

Patent

active

052439720

ABSTRACT:
A smoke-proof mask having a body with an upper chamber and a lower chamber, an exhaling valve fixed on the body for exhaled air to flow out, and an oxygen chamber provided in a lower portion of the body to receive and store oxygen coming from a small oxygen tank, the oxygen in the chamber being inhaled by a mouth of a wearer to pass through small holes in the chamber to move into the lower chamber in the body and through the mouth into his lung, and exhaled air coming out of the nose of the wearer being exhausted from the upper chamber through the exhaling valve into open air.

REFERENCES:
patent: 787167 (1905-04-01), Gates
patent: 902961 (1908-11-01), Goodnow
patent: 2359008 (1944-09-01), Smith
patent: 2625155 (1953-01-01), Engelder
patent: 2665686 (1954-01-01), Wood et al.
patent: 5109839 (1992-05-01), Blasdell et al.

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