Patent ID: 8474585

Claim:
A booster clutch device comprising: a ramp system including: a torque rigidity; a first ramp; a second ramp rotatable with respect to the first ramp and arranged to receive torque in a first rotational direction; and, at least one rolling element engaged with the first and second ramps; a first clutch engaged with the first ramp; a second clutch engaged with the second ramp and including at least one disc and an output including first and second clutch elements; and, a torque sensor, wherein: in response to the torque: the first and second ramps non-rotatably engage; the first and second clutches close; the first clutch element is rotatable with respect to the second clutch element in the first rotational direction to engage the torque sensor; and, the torque sensor urges the first clutch element in the second rotational direction with respect to the second clutch element; and, in response to a decrease in the torque, the torque sensor rotates the second ramp with respect to the first ramp.