A vertically movable workpiece support device has a ratchet wheel with a larger diameter than the outer diameter of a driving sprocket wheel and is concentrically attached to an end surface of a boss portion in the driving sprocket wheel. A pair of left and right bearing members are provided side by side, on a side on which the free end side of a drive chain is horizontally extended with respect to the driving sprocket wheel, so as to sandwich a horizontally extending path section of the drive chain. A movable pawl is pivotally supported between the pair of left and right bearing members and engages with the ratchet wheel to block the rotation of the ratchet wheel caused by the movement of the drive chain when the workpiece support base is lowered. An actuator switches the movable pawl to a non-action position with respect to the ratchet wheel.

A vertically movable workpiece support device has a drive chain bendable to only one side which supports a workpiece support base in a vertically linear path section. The drive chain extends from one end portion coupled to the workpiece support base to an intermediate portion engaging with a driving sprocket wheel. A chain guide plate which sandwiches, with the driving sprocket wheel, a link-to-link roller of the drive chain is arranged on an outer side of the driving sprocket wheel. A mark is displayed, on the side surface of the chain guide plate, in a position separated a certain distance outward from a turning path of links in the drive chain, and an opening portion for visually checking the mark is provided in a side wall which pivotally supports the driving sprocket wheel.

A vertically movable workpiece support device has a drive chain bendable to only one side which supports a workpiece support base in a vertically linear path section. The drive chain extends from one end portion coupled to the workpiece support base to an intermediate portion engaging with a driving sprocket wheel. A chain guide plate which sandwiches, with the driving sprocket wheel, a link-to-link roller of the drive chain is arranged on an outer side of the driving sprocket wheel. A mark is displayed, on the side surface of the chain guide plate, in a position separated a certain distance outward from a turning path of links in the drive chain, and an opening portion for visually checking the mark is provided in a side wall which pivotally supports the driving sprocket wheel.

The present invention involves a tool support assembly with a lifting mechanism and a lateral extension mechanism. The assembly is configured to be located in a walled bed such as a pickup truck bed, and extend the tool box above and beyond the wall.

The present invention involves a tool support assembly with a lifting mechanism and a lateral extension mechanism. The assembly is configured to be located in a walled bed such as a pickup truck bed, and extend the tool box above and beyond the wall.

A transportable drive-over conveyor system includes a drive-over hopper for receiving material and having a belt-type conveyor for conveying the material, a transition section pivotally connected to the drive-over hopper, an auger mounted at a downstream end of the transition section, and wheels beneath the auger that support and move the conveyor system. At least one wheel is a drive wheel. The wheels may be radially offset. The wheels may be arced to travel in arced tracks.

A transportable drive-over conveyor system includes a drive-over hopper for receiving material and having a belt-type conveyor for conveying the material, a transition section pivotally connected to the drive-over hopper, an auger mounted at a downstream end of the transition section, and wheels beneath the auger that support and move the conveyor system. At least one wheel is a drive wheel. The wheels may be radially offset. The wheels may be arced to travel in arced tracks.

A lift assembly includes a base, a platform moveable relative to the base between raised and lowered positions, and a scissor mechanism to move the platform relative to the base. The lift assembly also includes a lift mechanism including a base support coupled to the base and extending from the base toward the platform, a platform support mounted to the platform and extending from the platform toward the base, a first linkage supported by the base support and coupled to the platform support, and a first pulley supported by the first linkage. The lift assembly also includes a drive mechanism supported by the base and a cable extending from the drive mechanism, wrapped at least partially around the first pulley, and fixed relative to the platform support. The cable is configured to be tensioned by the drive mechanism such that the lift mechanism moves the platform to the raised position.

A lift assembly includes a base, a platform moveable relative to the base between raised and lowered positions, and a scissor mechanism to move the platform relative to the base. The lift assembly also includes a lift mechanism including a base support coupled to the base and extending from the base toward the platform, a platform support mounted to the platform and extending from the platform toward the base, a first linkage supported by the base support and coupled to the platform support, and a first pulley supported by the first linkage. The lift assembly also includes a drive mechanism supported by the base and a cable extending from the drive mechanism, wrapped at least partially around the first pulley, and fixed relative to the platform support. The cable is configured to be tensioned by the drive mechanism such that the lift mechanism moves the platform to the raised position.

A vehicle jack includes a lift element, an operative element operably connected to the lift element to transition the lift element from a first position to a second position, where the first position differs in elevation from the second position, and an extension element affixed to the lift element. The extension element has a bottom side that establishes a stable interface with the lift element.