Patent ID: 7392868

Claim:
Tiller truck provided with lifting hydraulics and a force transfer mechanism and coupling for the transfer of a pumping tiller handle movement to a drive movement for the steering wheels, wherein the coupling includes an inner cylindrical part with a cylindrical surface facing outward with flat axial machinings on the circumference, said machinings having guide rollers arranged therein between an outer cylindrical part with an inward facing cylindrical surface and a roller holder for driving in a first direction to hold the rollers wedged between the machining and the outer cylindrical part for movement in one direction, or transfer for movement in the opposite direction or a neutral free position, said coupling being arranged to have three control positions, one a neutral free coupling position and two opposite directions drive force transferring positions, while movement of the tiller in the opposite direction of a set drive force transferring turning direction allows free movement without force transfer of the tiller so that the wheels can rotate freely in the drive force transferring direction.