Wet-type friction member with grooves shaped for improved oil film removing effect

A friction engaging element comprising a wet-type friction member having a center and means for rotating said friction member in a first direction about an axis of rotation extending through said center, and having a disk-like friction engagement surface with an inner edge and an outer edge, and grooves formed in said friction engagement surface, said grooves including a first set of grooves and a second set of grooves,

• each groove of the first set having an inner end and an outer end, and extending from said inner edge toward said outer edge in a second direction opposite to said first direction at a first angle measured relative to a first imaginary radius passing through said center and the inner end of the groove, and
• each groove of the second set extending obliquely toward said outer edge, in a second direction opposite to said first direction, from an intermediate location on a first groove between said inner and outer edges, at a second angle, measured in relation to a second imaginary radius passing through said center and said intermediate location, said second angle being greater than the first angle of the last-mentioned groove of the first set.