Patent ID: 7997361

Claim:
A reverse drive mechanism for a multi-wheeled device, the multi-wheeled device having a front and a rear, the reverse drive mechanism comprising: a mechanical coupling between an electrical motor and at least one of the wheels of the multi-wheeled device; the electrical motor attached with the mechanical coupling configured to rotate the mechanical coupling, wherein the electrical motor is a variable speed motor capable of operating at least two different speeds when powered; an engagement mechanism configured to provide power to the electrical motor, wherein when power is provided, the electrical motor is configured to rotate the at least one of the wheels so that the multi-wheeled device travels towards the rear; and wherein the mechanical coupling includes: a first multi-toothed gear attached to the at least one wheel, wherein the first multi-toothed gear has teeth arranged around its inside periphery; and a second multi-toothed gear attached to the motor and is configured to engage the first multi-toothed gear.