Patent ID: 8800694

Claim:
A drive system, comprising: a first transmission disposed in a first housing and producing a first output; and a first torque control mechanism engaged to the first transmission to adjust the torque level of the first output to produce a continuous range of torque from a low-torque value to a high-torque value, the first torque control mechanism comprising a first biasing member to bias the first output to the low-torque value; a second transmission, substantially similar to the first transmission, disposed in a second housing and capable of producing a second output substantially similar to the first output; a second torque control mechanism engaged to the second transmission capable of adjusting the torque level of the second output to produce a continuous range of torque from the low-torque value to the high-torque value, the second torque control mechanism comprising a second biasing member to bias the second output to the low-torque value; wherein the low-torque value corresponds to a high rotational speed at the first and second outputs, and the high-torque value corresponds to a low rotational speed at the first and second outputs.