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:
Jun. 12, 2018
Filed:
Apr. 30, 2015
Applicant:
Sumitomo(s.h.i.) Construction Machinery Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 21/00 (2006.01); F15B 11/05 (2006.01); F15B 11/16 (2006.01); F15B 15/14 (2006.01);
U.S. Cl.
CPC ...
F15B 11/05 (2013.01); F15B 11/161 (2013.01); F15B 15/14 (2013.01); F15B 2211/2053 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20523 (2013.01); F15B 2211/26 (2013.01);
Abstract
A hybrid shovel includes an engine that is controlled at a constant revolution speed, a motor generator that assists the engine, a control part that controls a drive of the motor generator, and a hydraulic pump that is driven by the engine. The control part causes the motor generator to assist the engine when a revolution speed of the engine is lower than the constant revolution speed due to a load of the hydraulic pump. The control part causes the motor generator to decrease an assist output to said engine before the revolution speed of the engine returns to the constant revolution speed.