Abstract: A unified hinge may comprise a hinge tube that is rigidly attached to a truck frame and a bed section of a truck bed and a tail section of the truck bed, each of the bed section and the tail section having opposing hinge barrels affixed thereto that concentrically align on the hinge tube. Similarly, a unified hinge may comprise one or more mounting barrels that are rigidly attached to a truck frame and a bed section of a truck bed and a tail section of the truck bed, each of the bed section and the tail section having opposing hinge barrels affixed thereto that concentrically align on the one or more mounting barrels; a hinge tube runs through the one or more mounting barrels and the opposing hinge barrels. The unified hinge allows the bed section and the tail section to independently pivot along the hinge tube.

Abstract: A unified hinge may comprise a hinge tube that is rigidly attached to a truck frame and a bed section of a truck bed and a tail section of the truck bed, each of the bed section and the tail section having opposing hinge barrels affixed thereto that concentrically align on the hinge tube. Similarly, a unified hinge may comprise one or more mounting barrels that are rigidly attached to a truck frame and a bed section of a truck bed and a tail section of the truck bed, each of the bed section and the tail section having opposing hinge barrels affixed thereto that concentrically align on the one or more mounting barrels; a hinge tube runs through the one or more mounting barrels and the opposing hinge barrels. The unified hinge allows the bed section and the tail section to independently pivot along the hinge tube.

Abstract: A vibratory particle separating apparatus for separating a supply of particulate material into two streams according to particle size. The apparatus includes an inclined particle separating screen secured in a mount frame and characterized by multiple steps disposed perpendicular to the path of material flow. The mount frame is suspended in a support frame by resilient float mounts and vibrated by a vibratory motor mounted on the mount frame. The particulate material is loaded on the top inclined end of the vibrating screen and as the material cascades down the steps of the screen, particles smaller than a selected size fall through one of multiple, adjacent openings provided in each step and are collected or discharged for further processing in a stream below the screen, whereas larger particles are collected or discharged in a separate stream at the foot of the screen.