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:
Nov. 15, 1988
Filed:
Dec. 31, 1986
Applicant:
Inventors:
Masashi Kasaya, Higashimatsuyama, JP;
Tatsuhiko Abe, Higashimatsuyama, JP;
Assignee:
Diesel Kiki Co., Ltd., , JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137554 ; 251368 ; 29620 ; 427124 ; 4271263 ; 123305 ;
Abstract
In a valve unit having an ON-OFF switch constituted by a valve, the associated valve seat and an insulation layer, the layer is made of a compound consisting of a specific metal and a specific reaction gas and the layer is coated on the outer surface of the valve in such a way that its electrical resistance increases progressively from the inner surface closest to the valve to the outer surface destined to make contact with a guide member of the valve.