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:
Apr. 28, 2015
Filed:
Oct. 05, 2011
Shinya Imura, Toride, JP;
Seiji Ishida, Hitachinaka, JP;
Kouji Ishikawa, Kasumigaura, JP;
Yusuke Kajita, Ushiku, JP;
Hidetoshi Satake, Ishioka, JP;
Takatoshi Ooki, Kasumigaura, JP;
Manabu Edamura, Kasumigaura, JP;
Shinya Imura, Toride, JP;
Seiji Ishida, Hitachinaka, JP;
Kouji Ishikawa, Kasumigaura, JP;
Yusuke Kajita, Ushiku, JP;
Hidetoshi Satake, Ishioka, JP;
Takatoshi Ooki, Kasumigaura, JP;
Manabu Edamura, Kasumigaura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a hybrid-type construction machine equipped with a swing hydraulic motorand a swing electric motorin combination to save energy, the construction machine ensuring high operability of a swing bodyand providing high energy efficiency. In accordance with the amount of manipulation of a swing control lever, the construction machine changes a rate of a torque of the swing electric motorwith respect to that of the swing hydraulic motor. The construction machine also controls a relief pressure and the torque of the swing electric motorin accordance with the amount of manipulation of a swing control lever, a pressure of the swing hydraulic motor, and a rotating speed of the swing electric motor