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:
Sep. 04, 1990
Filed:
Aug. 04, 1989
Tadahiro Ohmi, Sendai, JP;
Yohichi Kanno, Sendai, JP;
Kazuhiko Satoh, Sendai, JP;
Tadahiro Hatayama, Sendai, JP;
Motoyama Eng. Works, Ltd., Miyagi, JP;
Abstract
A metal diaphragm valve comprises a valve cage, a metallic valve seat integral with the valve cage, a metal diaphragm having a peripheral edge portion supported in a liquid-tight manner by the valve cage and a central portion facing the valve to touch and leave the seat, a drive member for opening and closing the metal diaphragm, and a diaphragm pressing member interposed between the drive member and the metal diaphragm and adapted to press the diaphragm against the valve seat at a uniform sealing pressure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile