US Patent 8215892 Arrangement for moving a cargo-carrying apparatus on a vehicle

A method and an arrangement for moving a cargo-carrying apparatus on a vehicle from a first position to a second position. The vehicle has a longitudinal center line and includes a hook arm having a pivot end and a hook end, with the hook end coupled to the cargo carrying apparatus. The arrangement comprises a plurality of rollers mounted on one of the vehicle and the cargo-carrying apparatus. A pivot joint is positioned in the hook arm between the pivot end and the hook end. The hook end maintains engagement with the cargo-carrying apparatus on the vehicle in both the first position and the second position.