Patent ID: 7191882

Claim:
A power transmitting apparatus comprising: a clutch housing rotatable together with an input member and having a plurality of driving clutch plates; a clutch member connected to an output member and having a plurality of driven clutch plates alternately arranged between the driving clutch plates of the clutch housing; a rotational force inputted to the input member can be transmitted to or cut off from the output member via pressure-contact or release between the driving clutch plates and driven clutch plates, said clutch member including pressure-contact assisting cams for increasing the pressure-contacting force between the driving clutch plates and driven clutch plates when a transmission of the rotational force inputted to the input member to the output member is achieved and including a back-torque limiting cams for releasing the connection between the driving clutch plates and the driven clutch plates when the rotation speed of the output member has been exceeded that of the input member; and a pressure plate mounted on the clutch member and moveable in an axial direction of the clutch member for carrying out the pressure-contact or release of the driving clutch plates and the driven clutch plates via the axial movement relative to the clutch member; and stopper portions projecting from the pressure plate and fitted in recesses formed on the inner peripheral surface of the clutch member for limiting the rotation of the pressure plate relative to the clutch member.