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:
Dec. 21, 1999
Filed:
Jan. 20, 1999
Applicant:
Inventor:
Koichi Yoshihara, Fujisawa, JP;
Assignee:
NOK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137202 ; 137 43 ; 137510 ; 137587 ;
Abstract
A differential pressure regulating valve is disclosed which improves sealing performance when the valve closes. The differential pressure regulating valve has a diaphragm and a guide. The guide limits the moving direction of a retainer. A projecting part and an engaging hole engage with one another and reduce deformation of the diaphragm by tolerating a relative movement between the diaphragm and the retainer. A liquid shut-off valve device is also disclosed which incorporates the differential pressure regulating valve and has stable operating characteristics.