Patent ID: 6899210

Claim:
A piston coupling mechanism for a lockup device in a fluid-type torque transmission device comprising: a piston being configured to press a friction coupling part of a clutch mechanism against a front cover of the fluid-type torque transmission device, said piston being configured to couple non-rotatably and axially movably with said front cover; a first member being fixed to said front cover; a second member being fixed to said piston, said second member being configured to mate non-rotatably and axially movably with said first member; and a third member having, a fixed part being fixed to said first member or said second member, a hook part being configured to mate with said first member or said second member such that said hook part mates with a member different from a member to which said fixed part is fixed, said hook part being configured to mate from an axial direction while deforming elastically and to limit the distance said piston moves away from said front cover in said axial direction, and an elastic part being configured to deform elastically in said axial direction when said piston is pressed against said friction coupling part of said clutch mechanism against said front cover of the fluid-type torque transmission device.