Patent attributes
A personal transportation vehicle comprises a carrier, a control device, and a first and second pair of wheels. The first pair of wheels are fixed in a direction and the second pair of wheels are mounted on swivels below the carrier. The first and the second pair of wheels are arranged aligned and parallel to each other below the carrier. A first controller drives the first wheel and a second controller drives the second wheel of the first pair of wheels. The control device transmits signals to the first controller and the second controller to control the first driving device and the second driving device. The second pair of wheels are swiveled and driven by a difference between the rotational speeds of the first wheel and the second wheel of the first pair of wheels to determine a movement direction of the transportation vehicle.
