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:
Aug. 23, 2016
Filed:
Oct. 12, 2011
Seiji Ishida, Hitachinaka, JP;
Masataka Sasaki, Hitachi, JP;
Yusuke Kajita, Ushiku, JP;
Hidetoshi Satake, Ishioka, JP;
Takako Satake, Ishioka, JP;
Manabu Edamura, Kasumigaura, JP;
Kazuo Fujishima, Kasumigaura, JP;
Shiho Izumi, Hitachi, JP;
Seiji Ishida, Hitachinaka, JP;
Masataka Sasaki, Hitachi, JP;
Yusuke Kajita, Ushiku, JP;
Hidetoshi Satake, Ishioka, JP;
Manabu Edamura, Kasumigaura, JP;
Kazuo Fujishima, Kasumigaura, JP;
Shiho Izumi, Hitachi, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
Construction machine capable of incorporating an engine and using an external power source. The construction machine includes an electrical storage device performing a charge with the external power source, uses the electrical storage device to provide assist when the power of the engine is insufficient, uses an electrical charge in the electrical storage device systematically in accordance with work time, and efficiently uses the electrical storage device by controlling its discharge amount in accordance with load status. The construction machine includes the engine, accessory loads connected to the engine, an assist electric motor driven by the engine, electrical power converters for converting an AC current, which is the output current of the assist electric motor, to a DC current, and the electrical storage device connected to the DC side of each electrical power converter. The electrical storage device becomes charged through a charging device from the external power source.