Respirator

Details Respirator Respirator

1977-09-12

1979-06-05

Recla, Henry J.

Surgery

Truss

Pad

128191R, 128147, A62B 700

Patent

active

041570910

ABSTRACT:
A respirator canister provided with openings for flow of air therethrough is filled with a chemical that removes water vapor and carbon dioxide from the air and liberates oxygen into it. A breathing tube communicates with one of the canister openings, and an expandable breathing bag or equivalent has an opening communicating with the other canister opening. A spring or the like resists expansion of the bag during exhalation through the breathing tube and canister in order to maintain the air in the respirator under positive pressure to prevent toxic air from leaking into the respirator.

REFERENCES:
patent: 1533172 (1925-04-01), Drager
patent: 1679115 (1928-07-01), Drager
patent: 2269500 (1942-01-01), Wildhack
patent: 2428451 (1947-10-01), Emerson
patent: 3556098 (1971-01-01), Kanwisher
patent: 3980081 (1976-09-01), Cotabish et al.

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