Lung-governed valve

Details Lung-governed valve Lung-governed valve

1989-11-27

1991-05-21

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820712, 12820429, A62B 1802

Patent

active

050166271

ABSTRACT:
A lung-governed breathing valve used in a breathing mask for excess pressure operation. The valve has a casing with a spring-loaded control diaphragm which divides the casing into an outer chamber connected to the outside environment and a breathing chamber for conveying the gas for breathing. The control diaphragm controls a breathing gas inlet valve via a lever system and a manually released actuating button. The control diaphragm has a resilient raised portion formed integrally thereon with a recess therein. A push-rod integrally molded on the actuating button is positively engageable in the recess of the raised portion to prevent the lung-governed valve from being accidentally released or switched from the stand-by to the operative position.

REFERENCES:
patent: 4699137 (1986-04-01), Schroeder
patent: 4858606 (1989-08-01), Hamlin

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