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:
Mar. 07, 2023
Filed:
Jan. 17, 2020
Fujikin Incorporated, Osaka, JP;
Daihi Tsuchiguchi, Osaka, JP;
Toshihide Yoshida, Osaka, JP;
Ryutaro Tanno, Osaka, JP;
Yuya Suzuki, Osaka, JP;
Kenta Kondo, Osaka, JP;
Tomohiro Nakata, Osaka, JP;
Tsutomu Shinohara, Osaka, JP;
Masahiko Takimoto, Osaka, JP;
FUJIKIN INCORPORATED, Osaka, JP;
Abstract
A valve device capable of precisely adjusting a flow rate includes: an operating member for operating a diaphragm and provided movably between a closed position at which diaphragm closes a flow path and an open position at which diaphragm opens the flow path; a main actuator that receives pressure from a supplied drive fluid and moves the operating member to the open position or the closed position; an adjusting actuator for adjusting the position of the operating member positioned in the open position by using a passive element which expands and contracts in response to a given input signal; a position detecting mechanism for detecting the position of the operating member with respect to a valve body; and an origin position determining unit that uses a valve closed state in which the diaphragm contacts to valve seat to determine an origin position of the position detecting mechanism.