Locking up apparatus of hydraulic torque converter, in which outer peripheral surface of driven disc supports movable piston on inner peripheral surface

摘要

Pistons (39,38) are arranged to the left and right sides of front cover friction surface (70). The inner peripheral surface of the piston (38) is movably supported by outer peripheral surface of driven disc (53). A seal ring (67) is interposed between the mating surfaces of piston and driven disc to seal either ends along the axial direction.