CPC Subgroup
F16D 13/20 with clutching members co-operating with both the periphery and the inner surface of a drum or wheel-rim (similar brakes F16D53/00)
Full Title
Friction clutches (arrangements for synchronisation F16D23/02) > with clutching members co-operating with both the periphery and the inner surface of a drum or wheel-rim (similar brakes F16D53/00)