Importance

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Abstract

A roll-off hoist is mounted onto a vehicle to swing about a pivot at the aft end of the vehicle while the hoist moves along a slide plate supported by the pivot. A piston and cylinder assembly is coupled between the slide plate and the aft end of the hoist rails. As the hoist rails jut from the rear of the vehicle chassis, other piston and cylinder assemblies cause the forward portion of the hoist rails to swing above the chassis. The aft end portion of the hoist rails descends to ground level to receive the forward portion of a roll-off container which is drawn onto the hoist rails by a powerful winch. The piston and cylinder assemblies connected to the forward portion of the hoist rails are used to swing the hoist rails about the pivot while the piston and cylinder assembly in the rear portion of the hoist rails is inoperative to thereby elevate a container with the forward portion thereof extending high above ground level for dumping material in the container from an opening at the aft portion thereof.

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First Claim