Vehicle jack

Claim 2

In a vehicle jack having a base, a fluid actuated lift member mounted on the base for raising and lowering movement, a fluid cylinder associated with the lift member, valve means for admitting fluid to and discharging it from the cylinder, an upright member on the base having one row of upwardly directed stop teeth and a second row of downwardly directed stop teeth, first and second latch members mounted on the lift member and in yieldable engagement respectively with said first and second rows of teeth to lock the member against raising and lowering movement, a single control means movable to one position for simultaneously admitting fluid to the cylinder to raise the lift member and to make said second latch member inoperative and to a second position for simultaneously discharging fluid from the cylinder to lower the lift member and to make said first latch member inoperative.

Claim 3

The subject matter of claim 1 wherein said latch members are disposed in opposing horizontal alignment on the lift member, said valve means being mounted on the lift member in spaced relation above the latch members, and said control means comprising an elongated rod journaled in vertical position on the lift member for oscillating movement with the upper portion of the rod having operative connection with the valve means and the lower portion of the rod having operative connection with the latch members.

Claim 4

The subject matter of claim 2 wherein said rod has radially extending handles for oscillating the rod at both its upper and its lower ends.

Claim 5

In a fluid operated lift jack for vehicles or the like, a. a support base, b. an elongated tube mounted integrally in upright position on the base and having a piston head on its upper end, c. a lift cylinder having a closed upper end mounted on the piston for vertical sliding movement axially of the tube and having a vehicle lifting bracket thereon, d. means for admitting air under pressure to and discharging it from the lift cylinder above the piston for selectively raising or lowering the cylinder, e. means forming rows of ratchet teeth on opposing sides of the tube, f. a pair of opposing latch members supported by the cylinder in position to be engageable one with each row of ratchet teeth, g. a single control for the air means and the latch members adapted to move one latch member to a nonoperative position when air is admitted to the cylinder and to move the other latch member to a nonoperative position when air is discharged from the cylinder.

Claim 6

In a fluid operated lift jack for vehicles or the like, a. a support base, b. an elongated tube mounted integrally in upright position on the base and having a piston head on its upper end, c. a lift cylinder having a closed upper end mounted on the piston for vertical sliding movement axially of the tube and having a vehicle lifting bracket thereon, d. means for admitting air under pressure to and discharging it from the lift cylinder above the piston for selectively raising or lowering the cylinder, e. means forming rows of ratchet teeth on opposing sides of the tube, f. a pair of opposing latch members supported by the cylinder in position to be engageable one with each row of ratchet teeth, g. a single control for the air means and the latch members adapted to move one latch member to a nonoperative position when air is admitted to the cylinder and to move the other latch member to a nonoperative position when air is discharged from the cylinder.

Claim 7

The subject matter of claim 4 wherein h. each of said latch members is provided with a spring means urging it inwardly into engagement with the ratchet teeth, i. a bracket member mounted on the cylinder for lateral shifting movement and having connection with each of said latch members, j. and said control comprising an upright rod journaled on the lift cylinder and connecTed to the bracket member at a point offset from its turning axis whereby as the rod is rotated in one direction it will shift the bracket in one direction to move one latch member outwardly against its spring means and when rotated in the opposite direction will move the other latch member outwardly against its spring means.