Patent ID: 7900761

Claim:
A clutch system, comprising: a first hydraulic clutch, said first hydraulic clutch being provided between a power source and a first driven shaft, being capable of connecting and disconnecting between the power source and the first driven shaft, and including a first clutch piston; a second hydraulic clutch, said second hydraulic clutch being provided between the power source and a second driven shaft, being capable of connecting and disconnecting between the power source and the second driven shaft, and including a second clutch piston; and an input member, said input member including: an annular plate portion that receives power from the power source; an inner cylindrical portion having a base end formed integrally with and continuously from an inner perimeter side of the annular plate portion; and an outer cylindrical portion coaxially surrounding the inner cylindrical portion and having a base end formed integrally with and continuous from the outer perimeter side of the annular plate portion, wherein the input member is provided commonly to the first and the second hydraulic clutches that are arranged with the second hydraulic clutch concentrically surrounding the first hydraulic clutch, the inner and the outer cylindrical portions are made to be the input sides respectively of the first and the second hydraulic clutches, and the first and the second clutch pistons are placed on an opening end side of the input member.