A hydraulic deck comprising a frame consisting of a pair of horizontal members and a pair of vertical members, wherein the frame is configured to be mounted in a bed of a pickup truck; a pair of pivot arm members in telescoping engagement with the pair of horizontal members and a pair of extension members in telescoping engagement with the pair of vertical members; a platform member configured to support at least one vehicle; a pair of pillars rotationally connected to pin members positioned on the pair of extension members, wherein the pair of pillar extend perpendicularly from the platform member; and a mechanically operating lifting system configured to slide and lower the platform from the bed in a stored position to a ground surface in a loading position.

The present invention is a cargo carrier. The preferred embodiment is a cantilever displacement cargo carrier with a beam. The first end of the beam comprises a cantilever displacement housing with a pivot hole. A pivot beam is pivotally attached to the beam at the cantilever displacement housing by a pivot pin inserted into the pivot hole and a pivot bushing. The pivot beam preferably has at least one pin saddle where a horizontal bearing pin with at least one bearing is inserted. The bearing preferably has an outer circumference that extends above the top surface of the pivot beam and contacts the cantilever displacement housing. The second end of the beam has a receiver saddle where the pivot beam can be locked in place at an anchor bushing by a retainer pin.

Paver feeder assemblies, systems, and methods for use in mounting photovoltaic modules are provided which comprise a support structure and an elevator. The support structure is configured to support a plurality of pavers arranged in a stack. The elevator is configured to move the single paver from the support structure and to release the single paver into a mounting tub. The elevator may be a crane gantry configured to move in three axes. A restraining mechanism may be provided, which is configured to separate a single paver from the stack. The elevator may be a shelf assembly comprising one or more side restraints and one or more grippers configured to grasp a single paver and move from a start position adjacent to the support structure to lower the single paver to an end position directly above a floor of a mounting tub. The paver feeder assembly may be mounted on a mobile unit that is loaded with pavers at a staging area and moved to a dispensing area where mounting tubs are located.

Paver feeder assemblies, systems, and methods for use in mounting photovoltaic modules are provided which comprise a support structure and an elevator. The support structure is configured to support a plurality of pavers arranged in a stack. The elevator is configured to move the single paver from the support structure and to release the single paver into a mounting tub. The elevator may be a crane gantry configured to move in three axes. A restraining mechanism may be provided, which is configured to separate a single paver from the stack. The elevator may be a shelf assembly comprising one or more side restraints and one or more grippers configured to grasp a single paver and move from a start position adjacent to the support structure to lower the single paver to an end position directly above a floor of a mounting tub. The paver feeder assembly may be mounted on a mobile unit that is loaded with pavers at a staging area and moved to a dispensing area where mounting tubs are located.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a rear wheel assembly, a front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position. At least one of the wheel assemblies is powered by a selectively engageable drive assembly including a motor, transmission, driveshaft, selectively engageable clutch and hub, to drive the rotation of at least one of the wheels.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a rear wheel assembly, a front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position. At least one of the wheel assemblies is powered by a selectively engageable drive assembly including a motor, transmission, driveshaft, selectively engageable clutch and hub, to drive the rotation of at least one of the wheels.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a steerable rear wheel assembly, a steerable front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a steerable rear wheel assembly, a steerable front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

A lift frame assembly for a vehicle having an air suspension system is described herein which includes a lift frame assembly with a top frame body having a locking mechanism, a lift mechanism with an inflatable air bag operable with respect to the frame body and a source of compressed air in fluid communication with the inflatable air bag; and an air suspension system comprising a height adjustment valve for raising and lowering a frame height in communication with the source of compressed air, wherein the height adjustment valve operates in communication with an air suspension height control valve, and the height adjustment valve is operable to raise and lower the height of the frame by inflating or deflating at least a first pair of air springs positioned on a portion of the lift frame opposite the lift mechanism. The lift frame assembly may be used in conjunction with a cargo container assembly herein having a cargo base frame incorporating securable longitudinally pivotable support legs or lockable extendable and retractable support legs to provide a vehicle cargo container and lift frame assembly.

A lift frame assembly for a vehicle having an air suspension system is described herein which includes a lift frame assembly with a top frame body having a locking mechanism, a lift mechanism with an inflatable air bag operable with respect to the frame body and a source of compressed air in fluid communication with the inflatable air bag; and an air suspension system comprising a height adjustment valve for raising and lowering a frame height in communication with the source of compressed air, wherein the height adjustment valve operates in communication with an air suspension height control valve, and the height adjustment valve is operable to raise and lower the height of the frame by inflating or deflating at least a first pair of air springs positioned on a portion of the lift frame opposite the lift mechanism. The lift frame assembly may be used in conjunction with a cargo container assembly herein having a cargo base frame incorporating securable longitudinally pivotable support legs or lockable extendable and retractable support legs to provide a vehicle cargo container and lift frame assembly.