Patent ID: 7063196

Claim:
A dry multi-disc clutch in which a plurality of friction discs are interposed between a drive-side clutch outer member and a drive-side clutch center member, and power is transmitted from the clutch outer member to the clutch center member by pushing the friction discs using a pressure plate, wherein: fins that enhance a flow of air are formed on both of the clutch outer member and the pressure plates, and plural passages which allow the communication of air are formed in both the clutch outer member and the pressure plate, such that the clutch outer member is configured to act as an axial fan, and the pressure plate is configured to act as a centrifugal fan, wherein a portion of the clutch outer member forming the axial fan and a portion of the pressure plate forming the centrifugal fan are substantially parallel, and wherein the plurality of friction discs are disposed between the centrifugal fan and the axial fan.