Abstract: A circulating oil clutch comprises a casing inside which are a friction disk and generally annular pressure and reaction plates, one on each side of the friction disk. These plates are axially movable relative to each other so as to be able to clamp the friction disk between them. Control means are adapted to urge the pressure plate towards the reaction plate, which is adapted to support the assembly axially. Oil circulation channels on the backs of the pressure and reaction plates form parts of a common oil circulation circuit.

Abstract: A clutch cover assembly comprises a generally annular cover by which it is attached to a flywheel. A generally annular pressure plate is axially movable relative to the cover but constrained to rotate with it. An engagement device urges the pressure plate in the axial direction away from the cover. It is formed at least in part by an axially acting spring arrangement comprising at least two Belleville washers. These are disposed radially one inside the other with the larger diameter edge of one Belleville washer lying on a circumference of smaller diameter than the circumference on which lies the smaller diameter edge of the other Belleville washer.