DIRECTIONALLY STABLE SELF PROPELLED VEHICLE

摘要

A directionally stable self propelled vehicle movable in any desired direction and equipped with at least two front and two rear rotatable driving gears having ground contact elements mounted obliquely to the axes of rotation of the driving gears. The ground contact elements being mounted so that the ground contact lines for the front set of driving gears intersect in the backward direction and that the ground contact lines for the rear set of driving gears intersect in the forward direction.