Patent ID: 8397784

Claim:
A clutch mechanism, comprising: a first rotating disk defining at least one protrusion; a second rotating disk disposed coaxially with the first rotating disk; a pressure wheel disposed coaxially with and between the first and second rotating disks, the pressure wheel operably engaged by the at least one protrusion, the at least one protrusion movable between at least a first rotational position and a second rotational position relative to the pressure wheel; and a friction element disposed between the pressure wheel and the second rotating disk such that the friction element generates a first frictional force between the pressure wheel and the second rotating disk when the at least one protrusion is in the first rotational position and a second frictional force between the pressure wheel and the second rotating disk when the at least one protrusion is in the second rotational position, wherein the pressure wheel comprises a cammed surface facing the first rotating disk and the at least one protrusion carried by the first rotating disk comprises a nub slidably engaging the cammed surface.