Closed-circuit breathing apparatus

Details Closed-circuit breathing apparatus Closed-circuit breathing apparatus

1982-03-01

1984-04-03

Coven, Edward M.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820118, 12820125, 12820512, A62B 700

Patent

active

044401655

ABSTRACT:
A closed-circuit breathing apparatus includes an oxygen reservoir provided by flexible bags with open ends that can be rolled up and fastened in the rolled position to seal them. Oxygen is generated by a potassium superoxide canister that is activated by the water vapor in the exhaled breath of the user, and the oxygen generated is stored in the bag. The user breathes the oxygen from the bag, and flow of air through the system is controlled by simple check valves. Upward-directed passages are included in the air paths between a facemask and the check valves so that water droplets and ice are prevented from reaching the valves. The ice and water prevented from reaching the valves falls into a trap that can be easily cleaned in the field by removal of a plug.

REFERENCES:
patent: 1225269 (1917-05-01), Paul et al.
patent: 2402984 (1946-07-01), Browne
patent: 2403981 (1946-07-01), Jackson et al.
patent: 3658058 (1972-04-01), Neidhart et al.
patent: 3976063 (1976-08-01), Henndimer et al.
Mine Safety Appliances Brochure, (7 pp.).
CSE Corporation Advertisement (1 p.).

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