An ATV jack may include an engagement member and a leg which pivots which respect to the engagement member a limited amount to enable the jack to lift and hold an ATV. The leg may telescope to allow the jack to be used at a wide variety of heights. The jack may also be used as part of a system with at least one mounting bracket to allow a tire of an ATV to be lifted and retained or replaced.

An ATV jack may include an engagement member and a leg which pivots which respect to the engagement member a limited amount to enable the jack to lift and hold an ATV. The leg may telescope to allow the jack to be used at a wide variety of heights. The jack may also be used as part of a system with at least one mounting bracket to allow a tire of an ATV to be lifted and retained or replaced.

In an example, an adaptor for a lift jack may include a pair of coextensive segments having a pair of openings at a first end, and defining a space to receive a portion of a lift jack at a second end. The adaptor may also include a coupling pin that is to be inserted through the pair of openings to secure the adaptor to a vehicle. The second end of the coextensive segments may have a notch on each segment to receive the portion of the lift jack.

In an example, an adaptor for a lift jack may include a pair of coextensive segments having a pair of openings at a first end, and defining a space to receive a portion of a lift jack at a second end. The adaptor may also include a coupling pin that is to be inserted through the pair of openings to secure the adaptor to a vehicle. The second end of the coextensive segments may have a notch on each segment to receive the portion of the lift jack.

A central column allowing a 360 rotation on its central axis comprises mechanical safety locks and load sensors for safe operation in vertical and horizontal movements. The central rotating column may be part of a mounting and dismounting system for mining truck dump bodies and water truck bodies, providing two adjacent working areas. The lifting system for dump bodies of mining trucks and bodies of water trucks comprises a vertically adjustable mechanical lock; a spring-actuated automatic lock horizontally holding the column in position; an automatic rotation lock preventing the column from rotating while in operation; a toothed crown and pinion assembly integrated to the rotating base and allowing a 360 movement, and a load sensor preventing the horizontal movement of the column under load.

A collapsible hoisting device for use in the construction of large metal containers and to a removable accessory applicable thereto. It facilitates construction procedures by reducing project times and costs. The collapsible device includes a column (2) along which respective upper bodies (6) and lower bodies (7) that have been inserted into said column (2) move. The bodies (6, 7) are linked by an extendable means (8). The upper bodies (6) and lower bodies (7) have a corresponding mechanism to lock or attach (9) to the column (2), The column (2) is mounted so that it pivots with respect to a base (1) and the upper body (6) has a housing (609) suitable for the insertion of a removable, fingernail-shaped accessory (12).

Heavy equipment is attached to slings and lifted by rollers raised and lowered in a structure with four pillars. Rollers prevent torque and provide vertical vectors. Roller axle supports move along the pillars. Two gantry crane frames are joined by cross and truss beams. Hydraulic jacks and pneumatic locks are controlled and sensed movements are communicated to processors for each pillar. One master processor communicates with a remote control. Sensors check lock and hydraulic cylinder position and allow roller movements only when positions are correct and all processors agree.

A machine leveling pedestal incorporating a cylinder and piston defining an interior space, having a helically threaded outer surface, and having an upwardly facing land; a hydraulic fluid port opening the interior expansion space; a nut having a downwardly facing land and gear teeth, the nut being threadedly mounted over the helically threaded outer surface; a drive gear connected to the cylinder and piston for vertically slidably engaging the drive gear with the gear teeth, and, upon alternate rotations of the drive gear, rotating the nut about the cylinder and piston so that the nut vertically moves between a mechanical support position and a hydraulic support position, the upwardly and downwardly facing lands contacting each other upon movement to the mechanical support position, and the downwardly facing land displacing upwardly upon movement toward the hydraulic support position; and a motor connected to the drive gear.

A jack includes a main body (14) with a cavity (18). A lifting cylinder (42) is supported on the main body and is extendable into the cavity. A lock (30, 34) is movably coupled to the main body. A spring (38) is coupled to the lock and biases the lock into the cavity. A cylinder (86) is coupled to the lock and biases the lock out of the cavity against the biasing force of the spring.

A jacking tool capable of achieving up-down fine adjustment is provided, and belongs to the technical field of jacking tools. The jacking tool includes a fixed portion and a lifting portion; the fixed portion includes a base and a guide rod arranged on the base; the lifting portion is provided with a lifting plate, a climbing mechanism, and an adjustment grip for controlling the climbing mechanism; the adjustment grip is pressed to actuate the climbing mechanism, to control the lifting portion and the lifting plate to move up along the guide rod; the lifting portion is further provided with a locking mechanism clamped to the guide rod; the locking mechanism restricts the lifting portion from moving down; the lifting plate is slidably arranged on the lifting portion.