Time controlled gas flows

Details Time controlled gas flows Time controlled gas flows

1982-07-12

1985-08-20

Michalsky, Gerald A.

Fluid handling

Systems

Programmer or timer

13762418, 1376242, F15B 2102

Patent

active

045358125

ABSTRACT:
Apparatus for providing a gas flow only for a predetermined time period includes a normally pressurized closed valve in a gas line and a timed valve adapted to remove gas pressure from the normally pressurized closed valve thereby opening the same. The length of time during which such pressure is removed is controlled by the period of time necessary to exhaust pressure in a stage of the timed valve through a variable flow restrictor and upon expiration of such time period, pressure is reapplied to the line valve thereby closing the same. The flow of gas is thus permitted to continue for a predetermined time period following which the gas flow is terminated and relatively simple, conventional valve devices may be utilized to reliably control the gas flow.

REFERENCES:
patent: 3931832 (1976-01-01), Hodler
patent: 3943972 (1976-03-01), Bitonti
patent: 3981478 (1957-09-01), Borge

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