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. 19, 2015
Filed:
Apr. 22, 2011
Applicants:
Haruhiko Kawasaki, Atsugi, JP;
Masahiro Egawa, Kawaguchi, JP;
Inventors:
Haruhiko Kawasaki, Atsugi, JP;
Masahiro Egawa, Kawaguchi, JP;
Assignee:
KAYABA INDUSTRY CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01); E02F 9/22 (2006.01); E02F 9/20 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2217 (2013.01); E02F 9/2075 (2013.01); E02F 9/2235 (2013.01); E02F 9/2282 (2013.01); E02F 9/2285 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20523 (2013.01); F15B 2211/20576 (2013.01); F15B 2211/265 (2013.01); F15B 2211/88 (2013.01);
Abstract
A controller determines whether or not a control valve for controlling the supply of pressure fluid from a main pump to an actuator is at a neutral position, detects input power of a hydraulic motor rotated by return oil from the actuator, and narrows the opening of a proportional electromagnetic throttle valve when the control valve is at the neutral position and the input power of the hydraulic motor is in excess of a first threshold value.