Patent ID: 6938748

Claim:
A power transmission device comprising: an input member adapted to receive drive torque from a power source; an output member adapted to transmit drive torque to an output device; a transfer clutch operably disposed between said input member and said output member; a clutch operator operable for engaging said transfer clutch to transfer drive torque from said input member to said output member, said clutch operator including a drive member with a tapered drive surface, and a reaction member having a tapered reaction surface engaging said tapered drive surface and an apply surface engageable with said transfer clutch; and a clutch actuator controlling translational movement of said drive member for causing corresponding movement of said reaction member due to sliding engagement of said reaction surface with said drive surface so as to vary a clutch engagement exerted by said apply surface on said transfer clutch, said clutch actuator including an electric motor and a drive mechanism operably interconnecting said drive member to said motor.