role of the endless band on her current direction of the strip by a periodic querbewegung issued

摘要

Improvements on wheels variable separation, for agricultural and similar tractor, characterized by comprising a disc and a rim in it mounted, the disc comprises a hub for removably mounting the wheel on the axle of the tractor, and a body subject to the hub and ending at an outer edge. The body is open in a radial direction and the edge uniform is progressively displaced axially around or along its periphery to define a helical path, and means subject to the tire and ready to cooperate with the edge of the disc, by which method the relative rotation of the disc and rim results in axial movement of the rim on the disc.