Patent ID: 8770368

Claim:
A wet type friction plate, comprising: a carbon based friction member divided into a plural number of carbon members in a circumferential direction of said friction plate and a paper based friction member, said carbon members and said paper based friction member being pasted and fixed on said friction plate, wherein said carbon members are provided on an outer side of said friction plate at a predetermined interval and said paper based friction member is provided on an inner side of said friction plate, wherein said paper based friction member has a moment arm r 1 which is a distance from a center of said friction plate to a center of said paper based friction member and said carbon based friction member has a moment arm r 2 which is a distance from said center of said friction plate to a center of said carbon based friction member, wherein a ratio of r 1 to a sum of r 1 +r 2 is 0.38, and wherein a ratio of area occupied by said paper based friction member to a sum of areas occupied by said paper based friction member and said carbon based friction member is 0.24.