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:
Jun. 25, 1996
Filed:
Sep. 26, 1995
Applicant:
Inventors:
Kazuo Satoh, Yokohama, JP;
Koichi Yoshihara, Fujisawa, JP;
Assignee:
NOK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 611 ; 251331 ;
Abstract
A diaphragm valve (20) of the class having a diaphragm (32) backed-up by a spring retainer (38). The spring retainer (38) is provided, at a portion thereof facing the valve seat (30), with a relieved surface (48) spaced away from the diaphragm (38) in the free state thereof. The relieved surface (48) permits the diaphragm to resiliently yield in response to any circumferential undulation or unevenness (52) of the valve seat to provide a snug fit between the diaphragm (32) and the valve seat (30) throughout the entire circumference of the valve seat.