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:
Aug. 24, 2004

Filed:

Dec. 17, 2002
Applicant:
Inventors:

Yasunori Arai, Wako, JP;

Yoichiro Yamamoto, Wako, JP;

Masaki Inoue, Wako, JP;

Keiichi Takahashi, Wako, JP;

Yuji Yamamoto, Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 2/512 ;
U.S. Cl.
CPC ...
F16D 2/512 ;
Abstract

A lubricating structure of a hydraulic clutch including a drum-shaped clutch housing connected to an input shaft, and a clutch hub connected to an output shaft coaxial with the input shaft. The clutch hub has a cylindrical portion and a flange formed integrally with the cylindrical portion near one end of the cylindrical portion. The lubricating structure of the hydraulic clutch further includes a clutch piston for making pressure contact of first and second clutch plates respectively mounded to the clutch housing and the clutch hub and a hydraulic pump provided on the opposite side of the first and second clutch plates with respect to the clutch piston. The cylindrical portion of the clutch hub is formed with a plurality of first lubricating oil passages passing through the cylindrical portion, and the flange of the clutch hub is formed with a plurality of second lubricating oil passages passing through the flange.


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