Solenoid valve

Details Solenoid valve Solenoid valve

1987-12-21

1988-11-08

Nilson, Robert G.

Fluid handling

Systems

Sequentially progressive opening or closing of plural valves

25112901, F16K 3106

Patent

active

047828625

ABSTRACT:
A solenoid control valve has a main poppet to selectively open and close a port in a passage and when closed is subject to a fluid pressure differential tending to prevent valve opening. To facilitate valve opening, bypass passages through the main poppet are provided for reducing the net pressure on the main poppet and are controlled by a pilot valve. A solenoid and return spring control operation of a tubular plunger with an intregral pilot poppet. The main poppet is carried on a stem which has a telescoping lost motion connection to the plunger thus allowing the poppet to selectively engage a pilot seat on the main poppet for the closed valve state and for separating from the seat during valve opening.

REFERENCES:
patent: 3011751 (1961-12-01), Delany
patent: 3797526 (1974-03-01), Champeon
patent: 4251052 (1981-02-01), Hertfelder

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