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.

Date of Patent:
Dec. 07, 2010

Filed:

Aug. 23, 2007
Applicants:

Yoshiaki Tsukada, Saitama, JP;

Masahiro Kuroki, Saitama, JP;

Inventors:

Yoshiaki Tsukada, Saitama, JP;

Masahiro Kuroki, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A twin-clutch transmission system in a power unit for a vehicle includes a clutch system with a pair of hydraulic clutches, which respectively include clutch pistons. A gear transmission includes a first main shaft, which has a first end portion linked to a first one of the two hydraulic clutches. The gear transmission also includes a second main shaft, which has a first end portion linked with the other one of the two hydraulic clutches. A pair of hydraulic passages are concentrically formed inside the second main shaft, and apply hydraulic pressure respectively to the clutch pistons. An operating fluid is supplied from a second end side of the second main shaft. The resulting configuration enables the protrusion of the power unit toward the clutch system to be minimized.


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