Patent ID: 6273227
Filing Date: 2001-08-14
Classification: F16H

Abstract:
A lockup device for mechanically engaging and disengaging input and output members of a torque converter, said lockup device comprising:a clutch coupling portion; anda damper mechanism arranged to transmit torque to and from said clutch coupling portion, said damper mechanism havinga drive member adapted to receive torque from the input member,a driven member adapted to transmit torque to the output member,a plurality of first coil springs arranged to transmit torque between said drive member and driven member, said plurality of first coil springs aligned in a rotational direction of the torque converter and extending in the rotational direction,an annular member arranged to allow movement of said plurality of first coil springs in the rotational direction while restricting movement of said first coil springs in other directions, said annular member being supported by one of said drive and driven members and extending through said plurality of first coil springs, anda plurality of spring seats arranged on opposite ends of said plurality of first coil springs, said spring seats having apertures with said annular member located therein, each of said spring seats having a seat portion and a projection, said seat portions being in contact with said first coil springs, said projections extending from said seat portions into said first coil springs for engagement therewith.