Patent ID: 7017724

Claim:
A clutch assembly comprising: a clutch and a damper device housed in a housing that is connected to an engine output member, and an output member connected to an input shaft of an automatic transmission, the clutch assembly performing connection and disconnection of an output of an engine fed to the input shaft of the automatic transmission by engaging and disengaging the clutch, wherein: the clutch includes a first friction member, a second friction member, and a piston that is oil tightly fit with the housing so as to apply pressure to the first and the second friction members; and the damper device includes an elastic member that is axially aligned with the first and the second friction members, and the damper device has one end connected to a clutch hub that supports the second friction member and another end connected to the output member, wherein: the input shaft of the transmission is engaged with an inner peripheral surface of the output member with a spline; a sleeve shaft is fit with the input shaft with a first gap so as to be fit with the output member oil tightly; a hub constituting the housing is oil tightly and rotatively supported on a transmission case of the transmission with a second gap formed on an outer radial side of the sleeve shaft; and the first gap and the second gap form a lubricating oil circulation passage in the housing.