Patent ID: 7007780

Claim:
A variable speed clutch comprising: a source coupler; a first input drive coupled to the source coupler and configured to rotate; a second input drive configured to rotate; an output shaft configured to rotate; a first input hub coupled to the first input drive and configured to rotate about the output shaft in a first direction; a second input hub coupled to the second input drive and configured to rotate about the output shaft in a second direction opposite the first direction; an output hub fixed to the output shaft and configured to rotate therewith; a wrap spring having a first and a second end, the first end of the wrap spring fixed to the output hub such that the first end of the wrap spring rotates with rotation of the output hub; a control hub coupled to the second end of the wrap spring; and a control motor coupled to the control hub, the motor configured to alternatively rotate the control hub, wherein rotation of the control hub in the second direction causes the wrap spring to wrap open thereby engaging the second input hub and wherein rotation of the control hub in the first direction causes the wrap spring to wrap down thereby engaging the first input hub.