Mechanical jacking device
OwnerNavarre A. Masseyinventor
Life of this patent
Estimating the term…
Abstract
A relatively simple jack which can be manually operated using a wrench or mechanically operated using a driven socket wrench includes an elongated, upwardly tapering, square cross section casing, with a slot extending longitudinally of one side wall thereof, an endless chain mounted on sprockets at the top and bottom ends of the casing, and an off-the-shelf slack adjuster mounted on an upper side wall of the casing for driving the chain, which is engaged by a pawl having a load support arm extending outwardly through the slot in the front wall of the casing. By rotating the worm gear drive of the slack adjuster, the load support arm can be caused to move vertically in the slot to raise or lower a load.
Claims5
A jack for a vehicle or another heavy load comprising elongated casing means;
- slot means extending longitudinally of one wall of said casing means;
- panel means slidable in said slot means between the ends thereof;
- support arm means extending outwardly from said panel means for supporting a load;
- roller means on said panel means and on said support arm means movably supporting said panel means in said casing means for vertical movement in said slot means;
- endless chain means in said casing means engaging said panel means for moving the panel means and said support arm means in said slot means;
- and slack adjuster means on said casing means for driving said chain means, whereby in use, the support arm means can be moved vertically in said slot means between raised and lowered positions.
Dependencies are inferred from the claim text.