Patent ID: 7445553

Claim:
A damper disc assembly comprising: a drive plate adapted to be rotatably connected to a driving power source; a driven plate adapted to be connected to a driven device and being rotatable relative to the drive plate; and a damping mechanism adjusted to absorb an impact caused between the drive plate and the driven plate in response to the relative rotation between the drive plate and the driven plate, the damping mechanism positioned between the driven plate and the drive plate; the damping mechanism including: a coil spring possessing opposite ends that engage respective first and second spring seats; a torsion damper disposed in the coil spring, the torsion damper including at least one guiding portion having an outer diameter smaller than an inner diameter of the coil spring and a cushion portion integral with the at least one guiding portion inside the guiding portion and a common cross section in the radial direction of the torsion damper with regard to both the at least one guiding portion and the cushion portion; the guiding portion has a part located on an outer side in the radial direction from a visible outline of the cushion portion on the common cross section, and the torsion damper being deformed after a deformation of the coil spring.