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. 24, 2015
Filed:
Jul. 20, 2011
Shinji Nishikawa, Kasumigaura, JP;
Takenori Hiroki, Ibaraki-ken, JP;
Kouji Ishikawa, Kasumigaura, JP;
Manabu Edamura, Kasumigaura, JP;
Hidetoshi Satake, Ishioka, JP;
Takatoshi Ooki, Kasumigaura, JP;
Shinji Nishikawa, Kasumigaura, JP;
Takenori Hiroki, Ibaraki-ken, JP;
Kouji Ishikawa, Kasumigaura, JP;
Manabu Edamura, Kasumigaura, JP;
Hidetoshi Satake, Ishioka, JP;
Takatoshi Ooki, Kasumigaura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A hybrid construction machine has an electric motor for driving the swing structure, and the electric motor is prevented from becoming incapable of generating torque due to a low energy state or an overcharged state of an electricity storage device. A swing-mode selector switchwhich is manually operated switches between a hydraulic/electric combined swing mode for driving the swing structure by driving both the electric motor and a hydraulic motor and a hydraulic solo swing mode for driving the swing structure by driving only the hydraulic motor. For a normal operation, the swing mode is initially set in the hydraulic/electric combined swing mode. For a specific operation, the operator switches the swing-mode selector switch from a hydraulic/electric combined swing position to a hydraulic solo swing position.