Patent ID: 7073650

Claim:
A plate for a substantially circular multiple-plate clutch comprising at least one friction surface which has grooves having an inner bordering edge and an outer bordering edge, whereby at least one groove runs from the inner bordering edge to the outer bordering edge, characterized in that the at least one groove has at least one bending point at which the at least one groove is bent at an angle (a 1 , a 2 , a 3 , a 4 , a 5 ), wherein the angle at which the at least one groove is bent is from about 75Â° to about 115Â°; with respect to a line that is a radius of the substantially circular multiple-plate clutch that extends radially from the inner bordering edge to the outer bordering edge, and at least one additional groove is provided, the at least one additional groove being designed as a blind groove staring from the inside bordering edge or the outside bordering edge and have at least one bending point at which the at least one additional groove is bent at an angle, the at least one additional groove being bent in substantially the same manner as the at least one groove.