Abstract: An engaging and disengaging clutch includes a clutch disk having friction linings on each of two sides thereof, the friction linings being made from an organically bound friction material; a counterrotating member and a pressure plate both disposed adjacent the clutch disk; and a friction element disposed on at least one of the counterrotating member and the pressure plate and defining a friction surface being made from a sintered metal material. The sintered metal material contains therein any heavy components adapted for use in the friction linings of the clutch disk and in the friction element for achieving an optimum friction pairing therebetween, the organically bound friction material thereby being free of the heavy components.

Abstract: A clutch plate comprises a plate body having a hub and a driven plate which is connected to the plate body through compression springs to rotate with it and extends radially beyond the plate body. A ring-shaped friction lining is secured on the driven plate by rivets, the head of which are sunk into the friction lining. The friction lining is made up of two layers of friction material, and underneath layer riveted to the driven plate and an upper layer stuck onto the lower layer of friction material to cover its whole surface.

Abstract: A friction lining is designed in particular for clutches and plate-type disc brakes and has an annular body of friction material of which one face forms a friction surface. The annular body has holes distributed around its periphery for the passage of rivets. The holes designed to receive the rivets are arranged in the annular body clear of the friction surface and accordingly do not reduce the area of the friction surface.