Breathing system having breathing bag and supplemental gas dosin

Details Breathing system having breathing bag and supplemental gas dosin Breathing system having breathing bag and supplemental gas dosin

1994-10-27

1996-07-23

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820426, 12820524, A62B 902, A62B 704, A61M 1600, F16K 3126

Patent

active

055379958

ABSTRACT:
A closed or semi-closed breathing system for smoke diving and the like includes a pneumatically controlled breathing bag (1) communicating in a circulation (4, 5, 6) with a breathing mouthpiece or breathing mask (2) for a user and with an absorption means (3) for exhaled CO.sub.2, a pneumatic actuator (9) arranged for alternating expansion and contraction of the breathing bag (1) in accordance with the breathing pattern of the user, and a pressurized gas source (11) coupled to the breathing bag (1) to supplement the breathing gas therein. The system includes a mode regulator (10) arranged to control the actuator's actuation of the breathing bag (1) while simultaneously maintaining an overpressure in the breathing mask (2) in relation to the surroundings, and a dosing means (13) for the supply of a metered gas quantity to the breathing bag (1) in dependence on its degree of filling.

REFERENCES:
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patent: 4300547 (1981-11-01), Pasternack
patent: 4364384 (1982-12-01), Warncke et al.
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patent: 4667669 (1987-05-01), Pasternack
patent: 4793340 (1988-12-01), Ottestad
patent: 4886056 (1989-12-01), Simpson
patent: 5036841 (1991-08-01), Hamilton
patent: 5072728 (1991-12-01), Pasternack
patent: 5076267 (1991-12-01), Pasternack

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