CPC F16D 13/72 (2013.01) [F16D 13/648 (2013.01); F16D 13/52 (2013.01); F16D 13/74 (2013.01)] | 22 Claims |
5. A wet-type friction engaging device comprising:
a first friction member;
a plurality of friction facing material pieces arranged on a surface of the first friction member, the friction facing material pieces being spaced apart from each other at equal intervals in a circumferential direction of the first friction member; and
a second friction member including a base, the second friction member defining a groove formed on a surface of the base on a side facing the friction facing material pieces arranged on the surface of the first friction member, wherein
the groove defines a plurality of hexagonal shapes,
the groove is formed continuously on the surface of the base of the second friction member, and
corners of each of the hexagonal shapes share corners of adjacent ones of the hexagonal shapes.
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