Solenoid valve

Details Solenoid valve Solenoid valve

1993-12-10

1995-08-15

Rivell, John

Valves and valve actuation

Electrically actuated valve

Having means to produce digital pulses

25112908, 2511291, F16K 3106

Patent

active

054412323

ABSTRACT:
A solenoid valve capable of controlling precisely a small quantity of flow and obtaining a large quantity of fluid. In a duty control solenoid valve, there are provided a guide body for shutting off a fluid passage and in which a plunger is slidably guided, plural stages of flow control ports which are provided in the guide body and are opened or closed in response to the movement of the plunger, a plurality of return springs in response to the plural stages of flow control ports whereby the excitation energy of the electromagnetic coil can be switched to plural stages or the electromagnetic coils are selectable separately, thereby varying the opening areas of the plural stages of flow control ports.

REFERENCES:
patent: 4483369 (1984-11-01), Akagi et al.
patent: 4512546 (1985-04-01), Inada et al.
patent: 4546795 (1985-10-01), Okamoto et al.
patent: 4972996 (1990-11-01), Cerny
patent: 4988074 (1991-01-01), Najmolhoda
patent: 5178359 (1993-01-01), Stobbs et al.

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