Abstract: A roller glide system has a track having upper and lower guide rails on opposite sides, and a vehicle having wheeled carriages joined pivotally at opposite ends of two beam axles, a first frame member with a lower rearward extension mounting a first grooved wheel engaging the lower guide rail, an upper rearward extension mounting a second grooved wheel engaging the upper guide rail with the upper rearward extension pivoted vertically, and a compression spring urging the second grooved wheel against the upper guide rail, further having a second frame member having a lower forward extension mounting a third grooved wheel engaging the lower guide rail, an upper forward extension mounting a fourth grooved engaging the upper guide rail with the upper forward extension pivoted vertically, and a second compression spring between the lower and the upper rear forward extensions.

Abstract: An unloading device to unload an object includes a mainframe device having a mainframe bottom wall and a pallet Jack device to lift the mainframe device. The mainframe device may include a bulkhead plate which pivots with respect to the mainframe bottom wall. The pallet Jack device may include a pair of opposing pallet Jack legs to lift the mainframe device.