Patent ID: 8602392

Claim:
A jack assembly for raising and lowering vehicles, the assembly comprising: at least two shafts; a base sheet; a retentive sheet; at least two upper arms fastened to the retentive sheet; at least two lower arms fastened to the base sheet; a jack handle provided on one of the at least two shafts; a plurality of pulleys mounted on one of the at least two shafts; a groove provided on each of the plurality of pulleys; and a plurality of wire ropes passed over the groove provided on each of the plurality of pulleys; Wherein the jack handle is pulled up to move a first end and a second end of a wire rope passed over each of the plurality of the pulleys towards each other to make the at least two shafts to approach towards each other thereby displacing the at least two upper arms and the lower arms to lift the retentive sheet for raising the vehicles with a single pull movement of the jack handle.