Abstract: A clutch release arrangement for a clutch includes a pressure plate arranged in a clutch cover and having a fulcrum portion on its external circumference. A diaphragm spring is supported in the region of its external circumference to the clutch cover. The clutch is released by pressing the pressure plate in the direction of a clutch disk through the connection of the fulcrum portion of the pressure plate to the diaphragm spring. A return spring is arranged between the clutch cover and the diaphragm spring and in contact with the diaphragm spring, and the fulcrum portion is a continuously curved surface formed so that the height of the fulcrum portion is low in proportion to the distance between the fulcrum portion and a contact point.

Abstract: Friction facings comprising a non-woven fibrous lamina reinforced with stitching, and impregnated with a curable binder have improved resistance to delamination.

Abstract: A clutch disc assembly including a pair of annular friction facings in the form of a truncated-conical shape adapted to be frictionally gripped and flattened between a flywheel and a pressure plate in the engage state, the friction facings being made of a composite material consisting essentially of asbestos fiber and thermoset resin and being arranged to be contiguous to the side-face of the flywheel at their inner peripheries and spaced apart from the flywheel at their outer peripheries in the disengaged state, the hardness of the inner periphery of the facing opposed to the flywheel being greater than that of its remaining portion, and the hardness of the outer periphery of the facing opposed to the pressure plate being greater than that of its remaining portion.

Abstract: A friction clutch comprising a driving and driven members to be operatively connected with or disconnected from each other by being axially pressed to or separated from each other, respectively.Both members are coupled through elastic damper means in engagement of the clutch to thereby provide cushioning service when the clutch is being engaged against an impulsive torque applied to the driven member particularly by a heavier weight of vehicles.

Abstract: A friction clutch having a flywheel, a pressure plate, an entrainer disc disposed in the space between the flywheel and the pressure plate and splined on an input shaft of a transmission, and a clutch plate spring for engaging the pressure plate, adapted for transmitting torque from the flywheel by resiliently clamping the entrainer disc, and characterized by provision for a resilient, vibration-dampening member which serves to normally urge the pressure plate to be displaced from the flywheel by the stored elastic energy of the resilient member.