Diaphragm spring clutch for e.g. motor vehicle

The diaphragm clutch has a cover unit (51) having a mainly circular cover (54) fixed to a flywheel (50). Flywheel motion is transmitted to a clutch plate (52) through pads (53) by clamping the pads between friction surfaces (78, 77) of the flywheel and a pressure plate (58) respectively.The pressure plate has three parts: a main body (80) with the friction surface, on the opposite side to the friction surface a tilt part (81) with a shoulder (76) for tilting a plate spring (62), and an outer annular part (82). The tilt part can move axially relative to the main body. The annular part controls movement of the tilt part, moving it away from the main body friction surface. A spring (106) and an inclined surface (105) form a non-return coupling between tilt part and main body. Mécanisme d'embrayage à diaphragme est doté d'un dispositif automatique de rattrapage d'usure et comporte un corps (80) de plateau de pression, un élément d'appui (81) qui est axialement mobile par rapport audit corps (80), un élément de commande (82), des moyens de déplacements permettant de déplacer ledit moyen d'appui et une connexion unidirectionnelle (105, 106, 107) disposé entre ledit corps (80) et ledit élément d'appui (80). Application véhicule automobile.