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:
Nov. 11, 2008
Filed:
Dec. 20, 2007
Hikosaburo Hiraki, Oyama, JP;
Takashi Kuse, Komatsu, JP;
Toshikazu Okada, Osaka, JP;
Shigeru Yamamoto, Hirakata, JP;
Naoki Ishizaki, Kawachigun, JP;
Hikosaburo Hiraki, Oyama, JP;
Takashi Kuse, Komatsu, JP;
Toshikazu Okada, Osaka, JP;
Shigeru Yamamoto, Hirakata, JP;
Naoki Ishizaki, Kawachigun, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A transmission is provided which has a very compact system configuration and is capable of exerting high energy efficiency over all speed regions from a low speed region to a high speed region, while providing improved operability free from a torque shortage. To this end, the transmission has an input shaft, an intermediate output shaft, a planetary gear mechanism, a first pump-motor, and a second pump-motor connected to the first pump-motor, the input shaft being coupled to a first element of the planetary gear mechanism, the second pump-motor being coupled to a second element of the planetary gear mechanism, the intermediate output shaft being coupled to a third element of the planetary gear mechanism, and the transmission further comprising a switching mechanism for selectively coupling the first pump-motor to either the input shaft or the intermediate output shaft.