The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 1979
Filed:
Sep. 08, 1977
Applicant:
Inventor:
Seiji Kosugui, Soka, JP;
Assignee:
Shoketsu Kinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762564 ;
Abstract
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.