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:
Dec. 15, 2015
Filed:
Dec. 18, 2012
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Tsutomu Udagawa, Tsukuba, JP;
Kazuo Fujishima, Tsuchiura, JP;
Koji Ishikawa, Kasumigaura, JP;
Hidetoshi Satake, Ishioka, JP;
Yuichi Kunitomo, Tsuchiura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
There is provided a hydraulic excavator including a hydraulic pump () driven by an engine (), a boom cylinder () driven by hydraulic fluid delivered from the hydraulic pump (), a swing motor () driven electrically, an operating device (A) for operating the boom cylinder (), an operating device (B) for operating the swing motor (), and a vehicle body controller () which limits the power of the swing motor () in accordance with the operation amount of the operating device (A) when the two operating devices (A,B) are operated in combination. The power limit value of the swing motor () varies depending on the output of the engine (). This allows a good operational feeling to be retained in combined operation regardless of the operating state of the engine.