Patent ID: 9139167
Filing Date: 2015-09-22
Classification: B60T,F16D

Abstract:
1. A wet friction plate comprising: a flat annular metal core having a center of rotation; and a plurality of friction sheet groups which are disposed on a surface of the metal core and extend in a circumferential direction of the metal core, each friction sheet group comprising three frictional sheets consecutively arranged in the circumferential direction of the metal core and each separated from an adjacent frictional sheet by a gap forming an oil groove, each friction sheet group having on at least one of its inner periphery and its outer periphery a continuously changing contour which extends over all the frictional sheets in the friction sheet group and which coincides with a single continuous curve which is concave towards the center of rotation of the metal core over the length of the curve, the distance from the curve to the center of rotation of the core continuously changing over the length of the curve.