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:
May. 07, 2024
Filed:
Jun. 12, 2020
Fujikin Incorporated, Osaka, JP;
Kaoru Hirata, Osaka, JP;
Masaaki Nagase, Osaka, JP;
Atsushi Hidaka, Osaka, JP;
Kazuyuki Morisaki, Osaka, JP;
Keisuke Ideguchi, Osaka, JP;
Kosuke Sugimoto, Osaka, JP;
Masafumi Kitano, Osaka, JP;
Kouji Nishino, Osaka, JP;
Nobukazu Ikeda, Osaka, JP;
FUJIKIN INCORPORATED, Osaka, JP;
Abstract
A diaphragm valve includes a body () having a flow path (), a seat () formed in the flow path (), a metal diaphragm () for opening and closing the flow path (), a pair of clamping parts () and () for claiming peripheral edge portions of the metal diaphragm () to fix the metal diaphragm () to the body (), and an actuator () for abutting the metal diaphragm () to the seat () or separating the metal diaphragm from the seat (), wherein a fluorine resin coating is formed on a seat side surface () of the metal diaphragm () at least in a contact region (B-A) with the seat () in a region (C) surrounded by a clamping region (D-C) between the seat side surface () and one of the pair of clamping portions (), excluding the clamping region (D-C).