Patent ID: 8794412
Filing Date: 2014-08-05
Classification: F16D

Abstract:
1. A hydraulic clutch comprising: a clutch drum that includes at least: a clutch piston that defines together with the clutch drum an engagement side oil chamber, and moves in an axial direction so as to press the clutch plates by hydraulic pressure supplied to the engagement side oil chamber; and a cancel plate that defines together with the clutch piston a cancel oil chamber that cancels centrifugal hydraulic pressure, wherein: the side wall portion of the clutch drum is formed with a first oil passage that radially extends and is in communication with the engagement side oil chamber, and a second oil passage that radially extends and is in communication with the cancel oil chamber, and one of the first and second oil passages is at least partially included in a range of an axial width of the other of the first and second oil passages in the side wall portion.