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:
Dec. 22, 2020
Filed:
Jan. 04, 2018
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiba Energy Systems & Solutions Corporation, Kawasaki, JP;
Takuhiro Tsunekawa, Yokohama, JP;
Yuichi Nakamura, Yokohama, JP;
Koichi Nagaishi, Yokohama, JP;
Toshihiko Endo, Yokohama, JP;
Hisashi Goto, Kawasaki, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Toshiba Energy Systems & Solutions Corporation, Kawasaki, JP;
Abstract
A steam turbine valve drive apparatus in an embodiment includes a piston, a cylinder, a bidirectional pump, a servo motor, and a quick closing mechanism. The cylinder houses the piston in an inner space thereof, the inner space being partitioned by the piston into a first hydraulic chamber and a second hydraulic chamber. The quick closing mechanism executes a quick closing operation of closing the steam valve unit more quickly than the closing operation. Here, the quick closing mechanism executes the quick closing operation by feeding the working oil accumulated in an accumulator to the second hydraulic chamber and draining the working oil from the first hydraulic chamber.