Patent ID: 8240442

Claim:
A lock-up device that is used in a fluid torque transmission apparatus provided between an engine and a transmission, to transmit torque from an input rotary member and to absorb and to damp torsional vibration, comprising: a piston being supported rotatably with respect to the input rotary member and movably in the axial direction; an output rotary member; a plurality of elastic members elastically linking the piston and the output rotary member in the rotational direction; a support member having an outer peripheral support component being configured to support the outer peripheral side of the elastic members; and a retaining plate having a fixed component being fixed to the piston, and a radial support component being configured at the outermost part in a radial direction of the retaining plate being in contact with the outer peripheral support component, the radial support component supporting the outer peripheral support component in the radial direction to prevent the support member from moving in the axial direction.