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| Number | Title | Issue Date |
| 5237934 | End cap gate sampling device The present invention is a control device that allows an operator to partially open a gate valve found at the bottom of a railway freight car hopper in order to obtain a sample of a flowable particulate or granular product contained within the hopper but ... | 08/24/1993 |
| 5000358 | Low profile pneumatic outlet A low profile pneumatic outlet for a covered hopper railway car is disclosed which allows the bottom slope sheets of the hopper car to be moved downwardly closer to the rail thereby increasing the cubic capacity of the car while maintaining the car within... | 03/19/1991 |
| 4508037 | Door lever adjusting device for hopper car doors In a railway hopper car with several bottom dump doors, the doors are operated by a main door operating member in the form of a thrust bar running the length of the car. The bar, when moved, rotates levers which rotate actuator shafts which move door oper... | 04/02/1985 |
| 4163424 | Hopper door locking and actuating mechanism Both an operating link and a locking hook member are secured on a shaft rotatably mounted on a hopper door. The hook member cooperates with a locking lug fixed relative to the hopper for securing the door closed. The operating link is both pivoted and pus... | 08/07/1979 |
