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:
Aug. 06, 2019
Filed:
Mar. 04, 2016
Applicant:
Fujikin Incorporated, Osaka-shi, JP;
Inventors:
Assignee:
FUJIKIN INCORPORATED, Osaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 1/14 (2006.01); F16K 7/16 (2006.01); F16K 31/06 (2006.01); F16K 31/12 (2006.01); F16K 31/44 (2006.01); F16K 31/122 (2006.01);
U.S. Cl.
CPC ...
F16K 7/16 (2013.01); F16K 1/14 (2013.01); F16K 31/1221 (2013.01); F16K 31/1226 (2013.01); F16K 31/0675 (2013.01); F16K 31/12 (2013.01); F16K 31/44 (2013.01);
Abstract
Provided is a diaphragm valve that improves the durability of a diaphragm by focusing on the ratio of the radius of curvature of a pressing surface of a diaphragm presser to the radius of curvature of the diaphragm. SRb/SRa=0.4 to 0.6 is satisfied, wherein SRa represents the radius of curvature of a diaphragmand SRb represents the radius of curvature of a pressing surface of a diaphragm presser