Gas valve mechanisms

Details Gas valve mechanisms Gas valve mechanisms

1975-05-02

1977-01-25

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

1281458, 13754317, 137DIG9, F16K 1502, A61M 1600

Patent

active

040046036

ABSTRACT:
A gas valve mechanism especially suitable for use as the patient valve in conjunction with a lung ventilator or resuscitation device by developing high actuating forces from low pressure gas supplies comprises a valve element movable in a body having a gas pulse inlet, a gas pulse outlet and an exhaust outlet. The valve element has a large effective area exposed to the gas pulse inlet and is moved by gas pressure at that inlet, against spring-loading, to open a restricted flow path to the gas pulse outlet, the flow path restriction developing a pressure differential acting to oppose the spring loading and hold the valve element positively in the flow path open position.

REFERENCES:
patent: 2301276 (1942-11-01), Gussick
patent: 3025869 (1962-03-01), Kenfield
patent: 3176624 (1965-04-01), Sundholm
patent: 3451415 (1969-06-01), Buford et al.
patent: 3606905 (1971-09-01), Fehler
patent: 3672366 (1972-06-01), Burchell

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