Patent ID: 8684654

Claim:
A wheel assembly positioning device comprising: a wheel assembly cradle capable of lifting an object mounted on a hollow generally rectangular mast with front and rear aligned slots and smooth inner walls comprising a lifting track; a trolley operatively connected to the cradle; said trolley having an underside mounted for reciprocation up and down the lifting track on two pairs of wheels that are attached to the underside of the trolley and are designed, sized and configured to engage with portions of the lifting track to guide the trolley upwardly and downwardly within the lifting track; said cradle comprising a frame, two tire rollers, and a mounting bracket by which it is attached to an upper side of the trolley outside the front slot, wherein each of the two tire rollers is rotatably attached in a manner that allows the tire rollers to rotate in a clockwise or counterclockwise direction; a cable lifting assembly operatively connected to the trolley through the rear slot wherein the lifting assembly includes a lifting device that moves the trolley at a ratio of about 2:1 such that the trolley moves substantially vertically at about two increments for every one increment the lifting device moves; said cable lifting assembly having a single point attachment to an upper end of the trolley between an upper of the two pairs of wheels; said trolley suspended by the cable lifting assembly in the lifting track; and a mobilizer carriage.