Fast acting check valve

Details Fast acting check valve Fast acting check valve

1977-09-02

1979-04-24

Husar, C. J.

Pumps

Motor driven

Electric or magnetic motor

137456, 137486, 417505, F04B 1704

Patent

active

041509250

ABSTRACT:
A check valve which closes more rapidly to prevent wearing of the valve seat and of the valve member that seals thereagainst, including a solenoid or other actuator that aids the normal spring to quickly close the valve at approximately the time when downpath fluid flow would stop, the actuator then being deenergized. The control circuit that operates the actuator can include a pair of pressure sensors sensing pressure both upstream and downstream from the valve seat. Where the valve is utilized to control flow to or from a piston pump, energization of the actuator can be controlled by sensing when the pump piston reaches its extreme of travel.

REFERENCES:
patent: 2701331 (1955-02-01), Holst
patent: 2912997 (1959-11-01), Griswold
patent: 3282220 (1966-11-01), Inman
patent: 3303787 (1967-02-01), Inman
patent: 3485264 (1969-12-01), Schulze, Jr.
patent: 3860029 (1975-01-01), Hubler

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