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. 05, 2016
Filed:
Feb. 23, 2011
Haruhiko Kawasaki, Atsugi, JP;
Masahiro Egawa, Kawaguchi, JP;
Haruhiko Kawasaki, Atsugi, JP;
Masahiro Egawa, Kawaguchi, JP;
KAYABA INDUSTRY CO., LTD., Tokyo, JP;
Abstract
A control system for construction machine includes a main pump; a circuit system which includes a plurality of operation valves; a boom cylinder which is connected to a specific valve; one passage which allows communication between the specific operation valve and a piston-side chamber; another passage which allows communication between the specific operation valve and a rod-side chamber; a hydraulic motor which rotates by the action of return oil from the piston-side chamber; a generator; and a valve mechanism which is provided in the one passage communicating with the piston-side chamber of the boom cylinder, introduces the return oil from the piston-side at the time of descent as a regeneration flow to the hydraulic motor and introduces the return oil as a recovery flow to the rod-side chamber if necessary by causing the return oil to flow into the other passage.