Abstract: A friction facing assembly disposed at a radially outer portion of a clutch disk, comprises a cushioning plate structure of which radially inner portion is fixed to a side plate of the clutch disk and is elastically compressible in an axial direction of the clutch disk; a pair of friction facings fixed to respective surfaces of the cushioning plate structure; and an elastic means arranged between the cushioning plate structure and at least one of the friction facings; said elastic means being adapted to generate hysteresis in axial elastical deformation characteristics of the friction facing assembly.

Abstract: A clutch cover assembly comprising a pressure plate; a diaphragm spring; a clutch cover; a release mechanism and a pair of wire rings forming fulcrums for the diaphragm spring; and characterized in that; said clutch cover is provided at the inner periphery with circumferentially spaced projections, which are bent and extended through openings in the diaphragm spring toward the pressure plate, said wire rings are supported from the inner peripheral sides and the sides opposite to the diaphragm spring by said projections, the wire ring is provided with a cut and an end portion which is bent and inserted without a play into a circumferential space between a side edge of the opening in the diaphragm spring and a side edge of the projection, so that said bent end portion may prevent rotation of the diaphragm spring relative to the clutch cover.

Abstract: A friction mechanism in a damper disc has a cylindrical hub adapted to connect to an output device and having a radial flange. A pair of side plates are connected to an input member and disposed at respective sides of the flange. A sub-plate is disposed between the side plate and the flange. A torsion spring twistably connects the flange and the side plates together. The mechanism includes a first friction device for a first torsion operation; and a second friction device for a second torsion operation. The sub-plates are adapted to torsionally turn with respect to one of the flange and the side plates in a first torsion operation and to torsionally turn with respect to the other of the flange and the side plates in a second torsion operation. The first and second friction devices are radially shifted to each other and are disposed independently of each other.