Truck hoist

Abstract

A truck hoist assembly for use in combination with a dump vehicle having a chassis and a dump bed pivotally mounted to the rear of the chassis. A pair of relatively small sized hydraulic cylinders are pivotally connected adjacent the rear pivot of the dump bed, the distal ends of which are pivotally connected to an end of an elongated main lever. The other end of the main lever is pivotally connected to an elongated linkage assembly whose distal ends are, in turn, pivoted to the underside of the dump bed at a distance somewhat forwardly of a rear axle of the truck. The main lever is pivotally connected to the chassis at a fulcrum point which is substantially horizontally aligned with the dump bed pivot points when the bed is in its horizontal or down position. The assembly provides improved lifting leverage through the complete cycle of the hoist, especially near the top of the stoke, which in turn enables smaller and more economical hydraulic cylinders to be utilized.

Dependencies are inferred from the claim text.