Solenoid controlled valve

Details Solenoid controlled valve Solenoid controlled valve

1995-01-06

1998-07-07

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

137269, 137270, F15B 13043

Patent

active

057753741

ABSTRACT:
A small diameter piston is provided at one end of a valve shaft having a plurality of the valves, a large diameter piston is provided at the other, the valve shaft is moved by the acting of pilot pressure. A first operated passage communicating with a large diameter pressure chamber is opened and blocked by a first solenoid, a second operated passage communicating with a small diameter pressure chamber is opened and blocked by a first solenoid. A by-pass for communicating between an intake port and the small diameter pressure chamber is formed. A fluid passage changing block is provided at the outside of the small diameter piston of a housing. A by-pass communicating hole and a communicating hole for a second operated passage are opened at the fluid passage changing block in order to convert the initial position and the actuated position. The valve shaft is operated by the operation of the first solenoid with communicating between the by-pass and the small diameter pressure chamber at the initial position. The valve shaft is operated by the operation of the first solenoid and the second solenoid with communicating between the second operated passage and the small diameter pressure chamber at the actuated position.

REFERENCES:
patent: 5437306 (1995-08-01), Asou et al.

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