Patent ID: 7147092

Claim:
A multiple clutch unit for a power transmission system, said clutch unit comprising: a first clutch non-rotatably connected to a first input shaft of a transmission; a second clutch non-rotatably connected to a second input shaft of the transmission and arranged coaxially with the first clutch; a first piston/cylinder unit for actuating the first clutch; a second piston/cylinder unit for actuating the second clutch; wherein the first piston/cylinder unit includes a substantially cup-shaped cylinder that is closed on one side by an end wall and that is non-rotatably and axially-movably connected with the first input shaft; wherein the cup-shaped cylinder bounds a first working chamber, and the first input shaft includes an axial throughbore that communicates with the first working chamber for conveying pressurizing fluid to and from the first working chamber.