Patent ID: 8777791
Filing Date: 2014-07-15
Classification: B60W,B62M,Y10T

Abstract:
1. A bicycle drive unit comprising: a motor; a crank axle rotatable about a first rotational axis; a torque combining mechanism operatively coupled to the motor and the crank axle to combine rotational outputs of the motor and the crank axle, the torque combining mechanism having a sprocket mounting portion that is configured to be operatively attached to a sprocket such that the sprocket rotates about a second rotational axis of the sprocket in a first direction as the crank axle rotates about the first rotational axis in the first direction; and a clutch mechanism operatively disposed between the crank axle and the sprocket, the clutch mechanism being configured to rotate the sprocket about the second rotational axis in a second direction as the crank axle rotates about the first rotational axis in the second direction, the second direction being opposite the first direction.