Patent ID: 8127908

Claim:
A torque transfer mechanism for transferring drive torque from a rotary input member to a rotary output member, comprising: a roller clutch including a first set of cam surfaces adapted to be fixed for rotation with the rotary input member, a radially expandable slipper having a second set of cam surfaces and a plurality of rollers positioned between opposing pairs of the cam surfaces; a friction clutch including a first member being fixed for rotation with the slipper and having multiple conically-shaped surfaces, and a second member adapted to be fixed for rotation with the rotary output member and having multiple conically-shaped surfaces selectively engageable with the conically-shaped surfaces of the first member; and a wedge slide being radially outwardly moveable by radial expansion of the slipper, the wedge slide including a tapered surface for driving the first member into engagement with the second member and transferring torque between the rotary input and rotary output members.