Respirator for use in pressure chambers

Details Respirator for use in pressure chambers Respirator for use in pressure chambers

1982-06-23

1984-06-05

Coven, Edward M.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820024, 12820304, 13762414, A61M 1600

Patent

active

044522428

ABSTRACT:
The respirator for use in pressure chambers serves to ventilate patients in therapeutic areas or in diver pressure chambers at diverse pressures. All its operations are effected pneumatically. The selected (a) ventilating volume supplied to the patient must remain constant (in operating liters) and the selected (b) breathing rate must be maintained. For meeting condition (a), the respirator contains a known pressure ratio regulator working on the double-diaphragm principle, and for meeting condition (b) it contains a frequency stabilizer. The frequency stabilizer contains in a housing a stepped piston moved by the chamber pressure against a spring, forming two volumes. The ratio of the free piston surfaces to each other determines the breathing time ratio. The volumes, adjusted by the chamber pressure over the height, determine the breathing rate together with the gas amount/time unit set by a precision adjusting valve. A varying chamber pressure for the controls has no effect on the breathing time ratio and the breathing rate. The respirator is equally suitable for use in therapeutic pressure chambers, like hyperbaric oxygen chambers, and for diver pressure chambers.

REFERENCES:
patent: 3769996 (1973-11-01), Holbrook et al.
patent: 3916889 (1975-11-01), Russell
patent: 3949749 (1976-04-01), Stewart
patent: 3974828 (1976-08-01), Bird
patent: 3981301 (1976-09-01), Warnow et al.
patent: 4007736 (1977-02-01), Schreiber
patent: 4057059 (1977-11-01), Reid et al.
patent: 4098272 (1978-07-01), Stewart
patent: 4227519 (1980-10-01), Warnow et al.
patent: 4227523 (1980-10-01), Warnow et al.

Affiliated with

Also associated with

Rating

Respirator for use in pressure chambers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Respirator for use in pressure chambers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Respirator for use in pressure chambers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1492979