Abstract: A multipurpose loading and unloading and/or material handling and moving apparatus including a closed chain continuous roller grid disposed on and around a continuous elongate table, the roller grid comprising a plurality of parallel axles pivotally coupled at their ends by parallel first and second sets of independent mechanical links.

Abstract: A multipurpose loading and unloading and/or material handling and moving apparatus including a closed chain continuous roller grid disposed on and around a continuous elongate table, the roller grid comprising a plurality of parallel axles pivotally coupled at their ends by parallel first and second sets of independent mechanical links.

Abstract: A portable multipurpose lock having a shackle base with two parallel rods having opposing interior sides with spaced-apart detents, an adjustable lock body with through holes for slidable insertion of the rods, a lock for engaging the rods to secure and lock the lock body on the rods, and one or more recesses formed in the shackle base, lock body, or both, which facilitates placement of the lock around an object or objects to be secured.

Abstract: A multipurpose loading and unloading apparatus for installation on a pickup truck bed or the floor of a vehicle cargo area. The inventive apparatus includes a load-bearing member, such as a cargo box, having at least a slide board panel with an upper load-bearing side and a lower roller-engaging side. A roller mount is disposed under the slide board panel and includes, at a minimum, opposing and parallel guide rails. A roller assembly is interposed between the slide board panel and the roller mount, and it is tethered to the roller platform at a pivot point forward from the center of gravity of the load-bearing member. As the load-bearing member is moved rearwardly, it reaches a point at which it is tilted naturally when unloaded, and with little effort when loaded.