A linear jack includes an outer sleeve, an inner sleeve disposed at least partially within the outer sleeve, and an inner screw disposed at least partially within the inner sleeve. The outer sleeve is threadedly coupled to an outer diameter surface of the inner sleeve. The inner screw is threadedly coupled to an inner diameter surface of the inner sleeve. A thread pitch of the outer sleeve is greater than a thread pitch of the inner screw.

A linear jack includes an outer sleeve, an inner sleeve disposed at least partially within the outer sleeve, and an inner screw disposed at least partially within the inner sleeve. The outer sleeve is threadedly coupled to an outer diameter surface of the inner sleeve. The inner screw is threadedly coupled to an inner diameter surface of the inner sleeve. A thread pitch of the outer sleeve is greater than a thread pitch of the inner screw.

An automatic vehicle jack assembly includes a plurality of scissor jacks that is each mounted to a bottom side of a vehicle. Each of the scissor jacks is positioned adjacent to a respective one of a plurality of wheels on the vehicle for lifting the respective wheel upwardly from a support surface. Conversely, each of the scissor jacks is actuatable into a retracted position thereby facilitating the respective wheel to roll along the support surface. A control panel is positioned within a cab of the vehicle such that the control panel is accessible to a driver of the vehicle. The control panel is in communication with each of the scissor jacks thereby facilitating the control panel to independently or simultaneously actuate each of the scissor jacks between the extended position or the retracted position.

An automatic vehicle jack assembly includes a plurality of scissor jacks that is each mounted to a bottom side of a vehicle. Each of the scissor jacks is positioned adjacent to a respective one of a plurality of wheels on the vehicle for lifting the respective wheel upwardly from a support surface. Conversely, each of the scissor jacks is actuatable into a retracted position thereby facilitating the respective wheel to roll along the support surface. A control panel is positioned within a cab of the vehicle such that the control panel is accessible to a driver of the vehicle. The control panel is in communication with each of the scissor jacks thereby facilitating the control panel to independently or simultaneously actuate each of the scissor jacks between the extended position or the retracted position.

A lifting system for generating a lifting force on a portion of a vehicle includes a vehicle wheel and a force-generating mechanism structured to be received inside a rim cavity of the wheel. The force-generating mechanism is also structured to be operably connected to a frame of a vehicle. A bearing member is operably connected to the force-generating mechanism. The bearing member is structured to transmit a force generated by the force-generating mechanism to a surface in physical contact with the bearing member. The bearing member is also structured for operably connecting the wheel to the force-generating mechanism. Force applied by the force-generating mechanism may be sufficient to lift a portion of the vehicle off of a ground surface, or the force may only be sufficient to apply a parking brake force without lifting the vehicle.

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.

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.

The application discloses a Drop Deck Trailer having a pivoting axle system that allows the deck of the trailer to be incrementally lowered to the ground. When coupled to a tow vehicle, the partially lowered deck becomes a ramp to load and unload a vehicle. The unloaded trailer can be backed into a standard garage, uncoupled, and lowered completely to the ground. The UTV or light vehicle can then be front-loaded on the trailer. This capability allows the convenience and cost savings of simultaneously storing a UTV or other light vehicle in the same standard garage space. A unique articulated tongue assembly allows the operator to minimize the footprint of the parked trailer, allowing smaller spaces to be used for storage or simply eliminate a trip hazard. The Drop Deck Trailer is a combination of innovative features that provides convenience and cost savings.

A support device with differential mechanism transmission includes a base, a transmission device and a support mechanism. When the ring gear of the differential mechanism of the transmission device drives the first planetary gear assembly of the transmission device to rotate, the first planetary gear assembly cooperates with the central gear and the second planetary gear assembly of the transmission device to determine the sequence of unilateral transmission of the first lead screw and the second lead screw of the transmission device to drive the supporting legs of the support mechanism to expand outward or retract inward. In turn, it achieves the purpose of stable support, and has the effects of simple structure, miniaturization and cost reduction.

A support device with differential mechanism transmission includes a base, a transmission device and a support mechanism. When the ring gear of the differential mechanism of the transmission device drives the first planetary gear assembly of the transmission device to rotate, the first planetary gear assembly cooperates with the central gear and the second planetary gear assembly of the transmission device to determine the sequence of unilateral transmission of the first lead screw and the second lead screw of the transmission device to drive the supporting legs of the support mechanism to expand outward or retract inward. In turn, it achieves the purpose of stable support, and has the effects of simple structure, miniaturization and cost reduction.