Pneumatic valve

Details Pneumatic valve Pneumatic valve

1978-02-28

1980-04-22

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

114 54, 251 26, F16K 3112

Patent

active

041990064

ABSTRACT:
A pneumatic valve for controlling the inflation of floatation bladders in ver-deployed underwater recovery apparatus comprises, in one embodiment, an inlet connectable to a source of pressurized air, two small semi-circular flow passages joining the inlet to an outlet which connects to the bladders, a pair of spring-biased control pistons mounted in parallel in the two flow passages and another spring-biased outlet piston in a larger outlet passage positioned between the flow passages and the outlet. Air flow allowed by either of the control pistons impinges on an end of the outlet piston, displacing it from a normally closed to an open position to permit air flow through the larger outlet passage.

REFERENCES:
patent: 216766 (1939-05-01), Thomason
patent: 299482 (1961-09-01), Bower
patent: 966353 (1910-08-01), Petigor
patent: 1863732 (1932-06-01), Schwager
patent: 2367682 (1945-01-01), Kehle
patent: 2588202 (1952-03-01), Breit et al.
patent: 2887080 (1959-05-01), Fedrowich
patent: 3480029 (1969-11-01), Cole
patent: 3701363 (1972-10-01), Schuler
patent: 3776422 (1973-12-01), Wise
patent: 3813177 (1974-05-01), Cartwright
patent: 3836167 (1974-09-01), Wilson

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