Abstract: A retractable cover, including a pair of side, downwardly extending skirt portions, which is movable, either automatically or manually, from a covering relation to the open top of the load-carrying body of a truck to an open position. The side skirt portions normally overlap a substantial height of the top side edges of the body in the covering position whereby hump loads can be accommodated in the body without exposing the side edges of the load to the normal wind forces and air currents created by the movement of the truck. The margin of the side skirt portions each have elastic cords to provide tension to hold the margins to the truck body. A spring-loaded U-shaped frame, pivoted at its lower end, is utilized to move the cover between its open and closed positions.

Abstract: An accordion type of cover for the load-carrying body of a dump truck having a flexible cover fixed relative to a plurality of support frames, movable by an appropriate drive means from a stacked condition forwardly of the load-carrying body to a spread apart condition over said load-carrying body; the flexible cover, therefore, being selectively disposed in a folded condition forwardly of said body or in a covering relation thereto.