Patent ID: 7988401

Claim:
An apparatus for rotary dumping of rail cars, comprising: a dumping facility having an interior and an exterior; a material receiving pit disposed within the interior of the dumping facility, the pit having a dump side and a backside; a rotational frame disposed at least partially in the pit, the rotational frame configured to dump a load from a rail car during rotational motion of the rotational frame between an upright position wherein the entire load is in the rail car and a dumping position wherein the load can exit the rail car; a backside airflow diverter disposed within the pit adjacent the back side of the pit below the rotational frame, wherein the backside airflow diverter includes an upper surface, a backside hood for removing contaminated air from the back side of the pit located below the rotational frame; at least one baffle disposed on the rotational frame, the at least one baffle presenting a leading edge and configured to contact the upper surface of the backside airflow diverter during at least a portion of the rotational motion; and in a rings out dumping facility, an end ring baffle that extends from a grizzly upwardly to approximately the perimeter of a supporting ring and from the backside airflow diverter toward a dump side of the pit whereby dust laden air is substantially prevented from escaping from the pit under the end ring baffle.