A linear jack includes a first sleeve disposed at least partially within a second sleeve (the first sleeve and the second sleeve collectively a high speed assembly), a third sleeve disposed at least partially within the first sleeve, and a translating screw disposed at least partially within the third sleeve (the third sleeve and the translating screw collectively a low speed assembly). The linear jack further includes a fourth sleeve fixed to the second sleeve and configured to translate therewith. The fourth sleeve extends over the third sleeve and transfers axial loads between the second sleeve and the third sleeve to extend the high speed assembly together with the low speed assembly from an outer case of the linear jack.

An under hoist support stand in which the spin handle to turn the threaded support screw can be selectively engaged and disengaged from the support screw and allows the screw to be positioned along a longitudinal axis of the support stand.

An under hoist support stand in which the spin handle to turn the threaded support screw can be selectively engaged and disengaged from the support screw and allows the screw to be positioned along a longitudinal axis of the support stand.

A method and apparatus for transporting heavy machinery, equipment or other heavy loads from one location to another, whereby the apparatus may be constructed as a walking machine including a plurality of lifting assemblies operative to lift the load above the supporting surface and then move the load relative to the supporting surface by transporting the load via rollers or tracks in the walking machines. In one example, the lifting assemblies are provided with separate longitudinal and lateral drive mechanisms independently operative for translating the load in either or both longitudinal and lateral directions.

A method and apparatus for transporting heavy machinery, equipment or other heavy loads from one location to another, whereby the apparatus may be constructed as a walking machine including a plurality of lifting assemblies operative to lift the load above the supporting surface and then move the load relative to the supporting surface by transporting the load via rollers or tracks in the walking machines. In one example, the lifting assemblies are provided with separate longitudinal and lateral drive mechanisms independently operative for translating the load in either or both longitudinal and lateral directions.

A tool for disassembling and assembling bearings which support an engine mounting frame of an internal combustion engine, is mounted on a base, a bearing having opposing metal securing plates and a resiliently deformable damping element extending between the securing plates, said tool comprising opposing, parallel mounting plates, each mounting plate being mountable on a securing plate of a bearing to be dissassembled or assembled, and comprising a turnbuckle, via which the opposing mounting plates are operatively connected.

A tool for disassembling and assembling bearings which support an engine mounting frame of an internal combustion engine, is mounted on a base, a bearing having opposing metal securing plates and a resiliently deformable damping element extending between the securing plates, said tool comprising opposing, parallel mounting plates, each mounting plate being mountable on a securing plate of a bearing to be dissassembled or assembled, and comprising a turnbuckle, via which the opposing mounting plates are operatively connected.

A multiple speed jack handle system has a handle, an elongated rod, and a jack. The handle extends vertically from a first end to a first elbow, from the first elbow horizontally along a shaft to a second elbow and then vertically from the second elbow to a second knob. A first knob is connected to the shaft between the first and second elbows.

A lifting apparatus (100) is disclosed. The lifting apparatus (100) includes a power driving module (1) for providing a driving force, a plurality of lifting modules (21, 22, 23) for raising and lowering a supporting module (4) upon action of the driving force, and a transmission module (3) located under the supporting module (4) for transmitting the driving force to at least one of the plurality of lifting modules (21, 22, 23). An ultrasonic inspection system is also disclosed, which includes at least one ultrasonic probe and the lifting apparatus (100) for raising and lowering a workpiece (200) at least partly immersed in a liquid to a suitable position for inspection of the workpiece (200) by the at least one ultrasonic probe.

A lifting apparatus (100) is disclosed. The lifting apparatus (100) includes a power driving module (1) for providing a driving force, a plurality of lifting modules (21, 22, 23) for raising and lowering a supporting module (4) upon action of the driving force, and a transmission module (3) located under the supporting module (4) for transmitting the driving force to at least one of the plurality of lifting modules (21, 22, 23). An ultrasonic inspection system is also disclosed, which includes at least one ultrasonic probe and the lifting apparatus (100) for raising and lowering a workpiece (200) at least partly immersed in a liquid to a suitable position for inspection of the workpiece (200) by the at least one ultrasonic probe.