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. 03, 2012
Filed:
Oct. 26, 2006
Jun Morinaga, Yokohama, JP;
Tadashi Kawaguchi, Hiratsuka, JP;
Hiroaki Inoue, Hiratsuka, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A speed of a hydraulic actuator is matched with that of an electric actuator when the hydraulic actuator and the electric actuator are concurrently actuated. When determination units () determine that a boom hydraulic cylinder () and a rotation generator motor () are concurrently actuated based on a controlled variable of a boom control lever () and a controlled variable of a rotation control lever (), a torque of the rotation generator motor () is restricted based on a pump discharge pressure (Pp). Therefore, for example, a torque limit command is generated and output such that a torque limit value (TL) of the rotation generator motor () is decreased with a decrease in discharge pressure (Pp) of a hydraulic pump ().