Patent ID: 7581391

Claim:
A hydrodynamic torque transmitting device for transmitting torque from an engine to an output shaft extending toward a transmission through fluids, comprising: a front cover being configured to receive the torque from the engine, the front cover being located on an engine side of the hydrodynamic torque transmitting device; an impeller being located on a transmission side of the front cover, the impeller forming a fluid chamber with the front cover and having a plurality of blades on an inner surface thereof; a turbine being located in the fluid chamber on an engine side of the impeller, the turbine being configured to output the torque to the output shaft, the turbine including a turbine shell being located opposite the impeller and being provided with a plurality of blades, and a turbine hub located at a radially inner end of the turbine shell to couple the turbine shell with the output shaft; an annular slide member being located between the front cover and the turbine hub in the axial direction to receive the axial load, the slide member being formed with recesses and a plurality of grooves penetrating in the radial direction, and the grooves being located between the recesses in the circumferential direction, and an area occupied by the grooves in the slide member being equal to or more than 50% of a sliding area in the slide member; and a support member being fixed to one of the front cover and the turbine hub to support the slide member by urging the slide member in the axial direction against one of the front cover and the turbine hub.