Patent ID: 8011487
Filing Date: 2011-09-06
Classification: F16D

Abstract:
1. A clutch outer member for a multi-plate clutch, the clutch outer member comprising an end wall, a plurality of fins extending axially from an outer peripheral part of the end wall and arranged at equal intervals in a peripheral direction to define spline grooves therebetween, and an annular connecting part formed on an outer periphery at an extremity of the plurality of fins and connecting the plurality of fins integrally to each other, an axially-extending weight-cutting bottomed groove being formed in each fin of the plurality of fins and on an inner peripheral face thereof, wherein the annular connecting part is provided, on a part of an outer end face thereof corresponding to each spline groove, with a reference notch indicating a position of the spline groove, and each bottomed groove terminates at a bottomed auxiliary spline groove configured to open on an extremity face of each fin, the auxiliary spline groove having a width that is greater than a width of the bottomed groove.