Normally-open valve assembly with solenoid-operated pilot

Details Normally-open valve assembly with solenoid-operated pilot Normally-open valve assembly with solenoid-operated pilot

1976-05-24

1979-12-25

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 42, 251 46, F16K 31385, F16K 3140

Patent

active

041802365

ABSTRACT:
A normally-open pilot-operated valve assembly is provided which closes when a solenoid-operated pilot valve is energized. The pilot valve is open when the solenoid is de-energized to remove fluid pressure from a chamber in the valve housing causing the main valve to open. When the solenoid is energized, the pilot valve closes causing hydraulic pressure to build up in the valve chamber so that the main valve is closed. The solenoid-operated valve includes a plunger which extends into a discharge port, the plunger having a spherical member attached to its distal end which is drawn inwardly against a seat in the pilot discharge port to close the port when the pilot solenoid is energized.

REFERENCES:
patent: 1055161 (1913-03-01), Geissinger
patent: 1114431 (1914-10-01), Bopp
patent: 3367621 (1968-02-01), Griswold
patent: 3799496 (1974-03-01), Esten
patent: 3967808 (1976-07-01), Lieding

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