Solenoid valve

Details Solenoid valve Solenoid valve

1990-11-02

1992-06-02

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

25112917, F16K 31126

Patent

active

051180723

ABSTRACT:
A solenoid valve is formed with a first pressure chamber defined to be above a valve seat with and from which a valve member engages and disengages and to communicate with a fluid supply side within a valve housing, and solenoid means mounted to the valve housing with a pilot valve interposed between them while defining a pilot chamber below the pilot valve and a second pressure chamber above the pilot valve, the pilot chamber communicating with the first pressure chamber and with a fluid discharge side of the valve member. The pilot valve actuated by the solenoid means for a relatively smaller displacement allows the main valve member to be actuated to open and close the valve, whereby the solenoid means and eventually the entire valve can be minimized in size, and any impurity contained in flowing fluid can be prevented from adhering to a movable member in the solenoid means for assuring a highly reliable operation of the valve for a long term.

REFERENCES:
patent: 2659197 (1953-11-01), Halford et al.
patent: 3424427 (1969-01-01), Ruchser
patent: 4081171 (1978-03-01), Morgan et al.
patent: 4717116 (1988-01-01), Ishigaki
patent: 4816083 (1989-03-01), Bangyan

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