Abstract: A clutch disc assembly includes a flange having a plurality of window holes formed in a circumferential direction about the flange. A clutch plate and a retaining plate are disposed on either side the flange. The clutch plate and the retaining plate are fixed to each other and include a plurality of window holes corresponding to the window holes of the flange. A plurality of first coil springs are disposed in the window holes of the flange such that each end of the first coil springs are supported in the circumferential direction by the window holes in the retaining plate and the clutch plate. Protrusions are formed on circumferentially opposite ends of the window holes in the flange. The protrusions are configured to engage the first coil spring in response to rotary displacement between the flange and the retaining and clutch plates. Upon engagement between the ends of the first coil spring and the protrusions, the protrusions limit the radial outward movement of the first coil spring.

Abstract: A clutch disc assembly interposed between an input side rotary member and an output side member has a hub, disc-like plates, a friction member, an elastic member and a viscous damper mechanism. The hub is connectable for co-rotation with the output side member. The hub has a flange on its outer circumference. The disc-like plates are rotatably mounted on the hub. The friction member is connected to said disc-like plates, for frictional engagement with the input side rotary member. The elastic member is for elastically connecting the flange and the disc-like plates whereby the flange and the disc-like plates are rotatable with respect to each other. The viscous damper mechanism includes a fluid medium, for displacing the fluid medium through restrictions in response to angular movements of the disc-like plates and the flange with respect to each other.

Abstract: A clutch disc assembly interposed between an input side rotary member and an output side member has a hub, disc-like plates, a friction member, an elastic member and a viscous damper mechanism. The hub is connectable for co-rotation with the output side member. The hub has a flange on its outer circumference. The dlsc-like plates are rotatably mounted on the hub. The friction member is connected to said disc-like plates, for frictional engagement with the input side rotary member. The elastic member is for elastically connecting the flange and the dlsc-like plates whereby the flange and the disc-like plates are rotatable with respect to each other. The viscous damper mechanism includes a fluid medium, for displacing the fluid medium through restrictions in response to angular movements of the dlsc-like plates and the flange with respect to each other.