Patent ID: 8025340

Claim:
A dump truck having a leveling system for leveling a dump bed comprising: a chassis having wheels and a dump bed having a front and a rear, the dump bed being pivotally mounted to the chassis by means of a hinge pin located at the rear of the dump bed, a hydraulic main lift cylinder having one end affixed to the chassis and another end affixed to the front of the dump bed to raise and lower the front of the dump bed, the leveling system including a cylindrical tube rotatably mounted with respect to the chassis along a longitudinal axis of the dump bed, the cylindrical tube being affixed to the hinge pin such that rotation of the cylindrical tube rotates the hinge pin and the rear of the dump bed in a side to side tilting motion about the longitudinal axis of the dump bed, and a tilt sensor adapted to sense the orientation of the dump bed with respect to the horizontal and to activate the leveling system to move the hinge pin and the dump bed to a generally horizontal orientation whenever the dump bed is sensed by the tilt sensor to be at least a predetermined angular deviation from level.