Emergency breathing apparatus

Details Emergency breathing apparatus Emergency breathing apparatus

1975-03-27

1976-02-17

Michell, Robert W.

Surgery

Truss

Pad

1281466, A62B 708

Patent

active

039385124

ABSTRACT:
A mask is provided with a breathing opening, directly in front of the outer end of which there is a chemical cartridge that is secured to the mask. The cartridge has an exhalation passage extending through it from front to back, with its rear end registering with the breathing opening. A check valve in the inhalation passage allows air flow only into the mask. In the exhalation passage there is a carbon dioxide removing and oxygen generating chemical. A breathing bag is supported by the cartridge and communicates with the front end of the exhalation passage. The mask is provided with an inhalation check valve allowing air being inhaled from the bag to bypass the chemical.

REFERENCES:
patent: 1983475 (1934-12-01), Lemoine
patent: 1999086 (1935-04-01), Claudius
patent: 2507450 (1950-05-01), Millikan et al.
patent: 3208449 (1965-09-01), Bartlett, Jr.
patent: 3530857 (1970-09-01), Miczka

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