Railroadhopper car fittings and method of operation

Abstract From the Canadian patent

A hopper car discharge section is driven by actuators. The Hopper car has pairs of left , and right hand doors yoked together by a hollow section beam that extends clear across the car , beneath the center sill. The left and right hand doors move through the same arc of motion. A , pneumatic ram is used to drive the motion of the doors. The car has a straightthrough center , sill. The center sill has a bottom flange. The bottom flange splits at a widened portion. There is , an accommodation or pocket, located inside the center sill between the split sides of the bottom , flange of the center sill. The pneumatic ram seats in that pocket and is connected to drive the , doors.