Reactive, closed-circuit underwater breathing apparatus

Details Reactive, closed-circuit underwater breathing apparatus Reactive, closed-circuit underwater breathing apparatus

1992-09-29

1994-05-31

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820429, 12820513, 12820514, 12820516, 12820517, 12820522, B63C 1124

Patent

active

053159888

ABSTRACT:
This invention comprises a tunable underwater breathing apparatus (UBA) in hich the resonant frequency of the UBA may be adjusted to meet the diver's breathing frequency by controlling the inertance component of the UBA impedance. The principles of the present invention may be adapted to existing UBA with minor redesign and some additions.

REFERENCES:
patent: 3837337 (1974-09-01), LaViolette
patent: 3877425 (1975-04-01), O'Neill
patent: 3934581 (1976-01-01), O'Neill
patent: 4440166 (1984-04-01), Winkler et al.
patent: 4964404 (1990-10-01), Stone
patent: 5195516 (1993-03-01), Grimsey
Younes et al, Am. Physiol. Soc.; 0161-7567/87, pp. 2491-2499.
Van Liew, Undersea Biomed. Res.; vol. 14, No. 2, Mar. 87, pp. 149-160.
Fishman, Handbook of Physiology-Am. Physiol. Soc.; 87, pp. 145-177.
Joye et al, Formulation of Elastic Loading . . . ; NMRI Nov. 1989.

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