Three-position solenoid valve

Details Three-position solenoid valve Three-position solenoid valve

1997-02-13

1998-06-30

Michalsky, Gerald A.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

13759617, F15B 13044

Patent

active

057719330

ABSTRACT:
A three-position solenoid valve that can be used as a normally open type that can prevent reduction of responsivity due to the working pressure acting on a guide cylinder. When the solenoid is demagnetized, it is made to adopt a connecting position and since the working pressure does not act on the guide cylinder that guides the sliding of the moving iron core of the solenoid in this connecting position, it is possible to prevent deformation of the guide cylinder by the working pressure, which would reduce the responsivity of the solenoid valve and reduce the longevity of the solenoid by having the working pressure acting on it for long periods. Thus, it is possible to provide a valve that is suitable for use as a normally open three-position solenoid valve.

REFERENCES:
patent: 3605813 (1971-09-01), Nakano et al.
patent: 4773447 (1988-09-01), Imanaka et al.
patent: 5445189 (1995-08-01), Yamamuro

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