Patent ID: 8734080

Claim:
A method of modifying an apparatus for rotary dumping of rail cars to reduce dust pollution, wherein the apparatus may optionally already include a backside hood, the method comprising: adding at least one baffle to a rotational frame disposed at least partially in a 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; adding a backside airflow diverter within the pit adjacent a back side of the pit, wherein the backside airflow diverter includes a curved upper surface and a lower margin of the at least one baffle contacts the curved upper surface during at least part of the rotational motion of the rotational frame; assessing the apparatus to determine whether the backside hood is already present; adding the backside hood at a location beneath the backside airflow diverter on the back side of the pit if the backside hood is not already present.