By-pass pilot operated hydraulic check valve

Details By-pass pilot operated hydraulic check valve By-pass pilot operated hydraulic check valve

1981-05-07

1983-07-05

Rosenthal, Arnold

Fluid handling

Line condition change responsive valves

Direct response valves

137522, 251 14, 251130, F16K 1732, F16K 3106

Patent

active

043912966

ABSTRACT:
An electriclly actuated, spring biased closed solenoid valve comprising a valve actuating coil, a valve bias spring, a valve plug and a valve seat is adapted to be mechanically actuated by an hydraulic actuated piston actuated by hydraulic fluid in a second fluid channel and having means for cushioning release of the piston from the solenoid valve to prevent hydraulic hammer when the solenoid valve plug stops the flow fluid in the main fluid flow channel. The solenoid valve is also adapted to open under hydraulic back-pressure against the valve seat when the back-pressure exceeds the pressure of the normally closed spring bias.

REFERENCES:
patent: 2287936 (1942-06-01), Hose
patent: 2366006 (1944-12-01), Culver
patent: 2750961 (1956-06-01), Uritis
patent: 2890715 (1959-06-01), Ebersold
patent: 2905432 (1959-09-01), Mercier
patent: 3357676 (1967-12-01), Boonshaft
patent: 3421546 (1969-01-01), Jennings et al.
patent: 3631887 (1972-01-01), Schlechtreim
patent: 4067348 (1978-01-01), Davis

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