| 摘要 |
A door apparatus for a railway hopper car for discharging bulk material from the car has an elongated flexible hollow body positioned in a discharge opening. A pair of end walls are attached to opposite ends of the body. Each end wall has a first pivot point for rotary attachment to the body. The body is rotatable about the first pivot point between an opened position and a closed position. The body has an arcuate surface extending generally vertically when in the closed position to reduce the effort required to open the doors when the car is loaded. If the door apparatus is stuck in the closed position, such as when ice has formed between the longitudinal edge of the door apparatus and the edge of the discharge opening, a torque applied to one end of the door apparatus about the first pivot point tends to twist the door apparatus about the longitudinal axis.
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