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:
Feb. 21, 2017
Filed:
May. 10, 2012
Hidetoshi Satake, Ishioka, JP;
Takako Satake, Ishioka, JP;
Manabu Edamura, Kasumigaura, JP;
Takatoshi Ooki, Kasumigaura, JP;
Shinji Nishikawa, Kasumigaura, JP;
Kouichi Shibata, Kasumigaura, JP;
Hidetoshi Satake, Ishioka, JP;
Manabu Edamura, Kasumigaura, JP;
Takatoshi Ooki, Kasumigaura, JP;
Shinji Nishikawa, Kasumigaura, JP;
Kouichi Shibata, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A work machine includes a swing hydraulic motor and a swing electric motor for driving an upper swing structure. A capacitor supplies electricity to the swing electric motor and an operating device outputs through one operation, an operating signal for concurrently operating the swing hydraulic motor and the swing electric motor. A main controller switches between a hydraulic-alone drive mode and an electric-alone drive mode, the hydraulic-alone drive mode being a mode to drive only the swing hydraulic motor selected from the swing hydraulic motor and the swing electric motor when the operating device is operated, the electric-alone drive mode being a mode to drive only the swing electric motor selected from the swing hydraulic motor and the swing electric motor when the operating is operated. Therefore, the actuator that malfunctions can easily be specified among the plurality of mounted actuators.