JOSEPH ROY GRANER
Engineers in Pittsburgh, PA

4690603, Sep 1, 1987

Jul 2, 1985

6/751232

Joseph R. Graner - Pittsburgh PA

Heyl & Patterson, Inc. - Pittsburgh PA

B65G 6700

414372

A car dumping apparatus intended for open top railway cars or other containers which are moved sequentially through a supporting frame and are rotated upwardly and to one side about a single horizontal axis to discharge the contents onto a dumping area located on one side. A first hydraulic piston motor rotates the frame and railroad car as a combination about the horizontal axis. Thereafter a second hydraulic piston motor advances the combination of frame, railroad car, an intermediate support member and the first hydraulic piston motor, as a combination, about the same horizontal axis until the open top of the railroad car confronts the dumping area whereby the contents of the railway car are spilled onto the dumping area. Economies of construction and operation are achieved as a result of the rotation about a single horizontal axis. A preferred embodiment recognizes and exploits the fact that the frame and railroad car combination has a higher centroid level when the railroad car is loaded than when the railroad car is empty.