US Patent 7192354 Damper mechanism and damper disk assembly

A first damper mechanism 159 for absorbing and attenuating minute torsional vibration in a damper disk assembly for transmitting torque in a vehicle, has a plate spring 162. The plate spring 162 extends in the rotational direction having main surfaces facing in the radial direction. The plate spring 162 is pushed by the hub 106 in the rotational direction to slide against the intermediate rotating member 110 when the hub 106 and the intermediate rotating member 108 rotate relative to each other, thereby generating friction resistance.