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. 17, 2021
Filed:
Feb. 05, 2019
Ulvac, Inc., Chigasaki, JP;
Shinichi Wada, Chigasaki, JP;
Hideaki Inoue, Chigasaki, JP;
Kouji Shibayama, Chigasaki, JP;
Takuya Wade, Chigasaki, JP;
Harukuni Furuse, Chigasaki, JP;
Jirou Endo, Chigasaki, JP;
Mikiya Suzuki, Chigasaki, JP;
Shinnosuke Tokuhira, Chigasaki, JP;
Takaaki Terui, Chigasaki, JP;
ULVAC, INC., Chigasaki, JP;
Abstract
A gate valve comprising a plurality of first force-applying units built in a valve box; a second force-applying unit disposed between a first movable valve and a second movable valve; and a third force-applying unit. The first force-applying units are driven by incompressible fluid and have a function of applying a force to the first movable valve to be directed to the first opening portion in the flow passage direction and thereby causing the seal portion to be in close contact with a valve box inner surface located at the periphery of the first opening portion. The gate valve includes an incompressible-fluid driver that drives, the first force-applying units by incompressible fluid.