GARNITURE DE FRICTION POUR UN EMBRAYAGE COMPORTANT UN RESEAU DE RAINURES

L'invention propose une garniture de friction comportant une surface de friction annulaire destinée à venir en appui axial contre une surface de réaction, du type dans laquelle la surface de friction comporte un réseau de rainures pour permettre la circulation d'un liquide entre la garniture (38) et la surface de réaction, caractérisée en ce que le réseau de rainures ne débouche pas radialement vers l'extérieur (51) de la garniture (38). The friction lining for a torque converter clutch is made from a carbon composition material and designed to make contact with a reaction surface (40). It has a series of concentric (54,56) and radial (58,60) grooves in its surface for circulating a liquid between the clutch lining and reaction surface. One set of radial grooves (60) connects with an inner annular groove (54), while the other set (58), located between the two annular grooves, is offset relative to the first set in a peripheral direction, and non of the grooves emerge radially outside the lining. In a variant of the design the lining can have a spiral groove with a series of radial grooves connecting the spirals.