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:
Oct. 27, 2009
Filed:
Sep. 26, 2002
Hidetoshi Satake, Ishioka, JP;
Yukihiro Tatsuno, Tsukuba, JP;
Hidetoshi Satake, Ishioka, JP;
Yukihiro Tatsuno, Tsukuba, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A construction machine according to the present invention includes a variable displacement hydraulic pump () driven by a prime mover (), a single traveling actuator () driven with pressure oil discharged from the hydraulic pump (), a plurality of work actuators (to) driven with the pressure oil discharged from the hydraulic pump (), a plurality of control valves (to) that control flows of the pressure oil from the hydraulic pump () to each of the traveling actuator () and the plurality of work actuators (to), a detection means () for detecting a drive command for the traveling actuator (), and a flow rate control means () for increasing a maximum flow rate of the hydraulic pump () when the drive command for the traveling actuator () is detected with the detection means ().