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:
Sep. 09, 2014
Filed:
Apr. 19, 2012
Koji Ueda, Hiroshima, JP;
Koji Yamashita, Hiroshima, JP;
Masayuki Komiyama, Hiroshima, JP;
Yoichiro Yamazaki, Hiroshima, JP;
Yusuke Kamimura, Hiroshima, JP;
Koji Ueda, Hiroshima, JP;
Koji Yamashita, Hiroshima, JP;
Masayuki Komiyama, Hiroshima, JP;
Yoichiro Yamazaki, Hiroshima, JP;
Yusuke Kamimura, Hiroshima, JP;
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Abstract
A slewing-type working machine includes: a hydraulic motor having first and second ports and driving an upper slewing body to slew it; a hydraulic pump; a slewing operating device including an operating member; a control valve controlling the hydraulic motor based on an operation signal of the slewing operating device; first and second pipe-lines connecting the first and second ports of the hydraulic motor to the control valve; communication switching devices switchable between communication and cutoff between both pipe-lines and a tank; a slewing electric motor; an electric storage device; and a controller. During a slewing operation, the controller brings the communication switching devices into a communicated state and performs regenerative control by issuing a command on a regeneration amount corresponding to a reduction in back pressure by the communication switching devices in the communicated state to the slewing electric motor.