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:
Jan. 02, 2018
Filed:
Sep. 19, 2014
Applicant:
Showa Corporation, Gyoda-shi, JP;
Inventors:
Assignee:
SHOWA CORPORATION, Gyoda-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/01 (2006.01); F15B 11/024 (2006.01); F04B 5/02 (2006.01); F04B 53/10 (2006.01); F15B 13/02 (2006.01); F15B 15/18 (2006.01); F04C 2/18 (2006.01); F04C 15/06 (2006.01); B63H 20/10 (2006.01);
U.S. Cl.
CPC ...
F15B 11/024 (2013.01); F04B 5/02 (2013.01); F04B 53/10 (2013.01); F04C 2/18 (2013.01); F04C 15/068 (2013.01); F15B 13/027 (2013.01); F15B 15/18 (2013.01); B63H 20/10 (2013.01); F15B 13/01 (2013.01); F15B 2211/205 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20561 (2013.01); F15B 2211/27 (2013.01); F15B 2211/30 (2013.01); F15B 2211/3051 (2013.01); F15B 2211/50518 (2013.01); F15B 2211/50554 (2013.01); F15B 2211/511 (2013.01); F15B 2211/565 (2013.01); F15B 2211/7052 (2013.01);
Abstract
A pump apparatus includes: a pump that ejects a hydraulic fluid; and a selector valve that switches a direction of a flow of the hydraulic fluid to be supplied to one of a first chamber and a second chamber of a cylinder apparatus, which is internally partitioned by a piston into the first chamber extending during an extending stroke of the cylinder apparatus, and the second chamber extending during a shortening stroke of the cylinder apparatus, and the selective valve has, at a channel connected to the second chamber, an orifice that is narrower than a channel connected to the first chamber.