Minimal elastance, closed-circuit underwater breathing apparatus

Details Minimal elastance, closed-circuit underwater breathing apparatus Minimal elastance, closed-circuit underwater breathing apparatus

1992-09-29

1994-04-05

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820426, 12820429, 12820513, 12820522, A61M 1600, A62B 704

Patent

active

052995674

ABSTRACT:
This invention comprises a minimal elastance underwater breathing apparatus UBA) in which the elastance component of UBA impedance is substantially eliminated by forcing the breathing bag to expand and contract in a horizontal plane with small vertical displacements and hence minimal elastance. The invention further includes a servo-mechanism operating with a microprocessor, 3-axis position sensor and rotatable joints which act to keep the breathing bag oriented horizontally no matter what the diver's position. The principles of the present invention may be adapted to existing UBA with redesign and 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. 1987, 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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