Mitsubishi Materials Corporation

Osaka Gas Company Limited

Mitsubishi Mining and Cement Co. Ltd.

Mic Co, Ltd

Yuichi Andoh

Tokio Uetsuhara

Kenji Iio

Masaki Kouzu

There are provided a valve which is opened by an improved two-step motion, a valve which operates positively without leakage of fluid even when the difference in pressure between inlet and outlet of the valve is very small, and an improvement of a solenoid valve using those valves. The present invention relates to small-sized opening/closing valve and solenoid valve capable of being operated by very small force and electric power using a dry cell or the like, and is suitable to a solenoid valve for automatic opening/closing control which is used in city gas appliances, etc.

Valve and solenoid valve operated by very small force

The present invention provides an improvement for noise suppression, in an electromagnet constructed of the parts including a yoke, a fixed iron core fixed relative to the yoke, a movable iron core capable of being attracted toward and coming apart from the fixed iron core and a coiled wire wound around the magnetic path formed of the yoke, fixed iron core and movable iron core which serves to attract the movable iron core toward the fixed iron core by means of the magnetic flux induced by passing an electric current therethrough, which comprises dividing either one of the fixed iron core and the movable iron core into a body member and an end-surface member, at which the fixed and movable iron cores are contacted with each other, providing an elastic insert member between the body member and the end-surface member of the iron core in such a manner as not to interrupt the path of the magnetic flux and, optionally, providing a spring means which urges a stem supporting the end-surface member in such a manner that the end-surface member is pressed against the elastic insert member with a predetermined pressure.

Electromagnet

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Kurate, Japan

Yuichi Andoh