Shoketsu Kinzoku Kogyo Kabushiki Kaisha

Seiji Kosugui

There is described an improvement in solenoid pilot operated valve using a spool/piston assembly which is operated by fluid pressure in a pilot chamber, wherein a piston is slidably mounted on one or both ends of a spool and independently returnable to its initial position upon relieving the pilot chamber of fluid pressure.

Solenoid pilot operated valve

There is described a solenoid pilot operated change-over valve of the type using a spool/piston assembly which is movable in response to pressure prevailing in a pilot chamber, wherein the effective diameter of a drain valve seat in the pilot chamber is formed at least 1.4 times greater than that of a pilot valve seat on the piston through which the pilot chamber is communicable with an input port of the valve. The spool/piston assembly is reset to the initial position upon de-energization of the solenoid before the pilot valve seat is completely closed by a plunger.

Growing community of inventors

Soka, Japan

Seiji Kosugui