LOAD MOVING VEHICLE

A vehicle suitable for use in moving heavy loads along horizontal and inclined paths wherein the vehicle includes a frame having a pair of spaced shafts rotatably mounted thereon. Each shaft has two pairs of disks rigidly secured thereto and being eccentrically mounted thereon, one pair of disks being rotatably mounted on a pair of inner track units and the other pair of disks being rotatably mounted on a pair of outer track units. The track units are generally parallel with each other and the eccentric coupling of the shafts to the inner track units is approximately 180 DEG out of phase with that of the disks of the outer track units. Reversible drive means carried by the frame and coupled with the shafts rotating the same and thereby the disks relative to respective track units to cause one of the pairs of track units to advance in stepwise fashion as the other pair of track units remains stationary and vice versa. A pair of roller units can be releasably attached to the outer track units to permit the vehicle to be rolled over a flat surface with the track units elevated above the surface.