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| Number | Title | Issue Date |
| 7832340 | Hopper railcar with automatic individual door system The door operating system of the present invention can be applied to new railcar or retrofitted to existing railcar designs. The hopper car will have a pair of doors on opposed sides of the center sill which are connected through a door spreader. The pneumatic, indi... | 11/16/2010 |
| 7389732 | Mechanism for selectively operating hopper doors of a railroad car A mechanism for selectively operating hopper doors of a railroad car. A fulcrum coupled to the operating cylinder includes channels within which levers can be selectively activated to open specific doors of the car, thus allowing the contents of the railcar to be se... | 06/24/2008 |
| 7178464 | Rail car door closer A track mounted system for closing rail car doors that enables the simultaneous closing of multiple car doors. After hopper car contents such as aggregate or coal are unloaded, the doors are closed in pairs by semi-automated door closing arms that are positioned on ... | 02/20/2007 |
| 7080599 | Railroad hopper car transverse door actuating mechanism An actuating system for operating transverse doors of a railroad hopper car. The mechanism includes an operating member which is coupled to a door or doors of the car by a shaft and a linkage which couples a power source to the operating member, where the operating ... | 07/25/2006 |
| 6955126 | Railroad hopper car longitudinal door actuating mechanism An actuating system for operating longitudinal doors of a railroad hopper car. The mechanism includes an operating member which is coupled to each end of the door set of the car by a shaft and a linkage which couples a power source to the operating member, where the... | 10/18/2005 |
| 4437798 | Valve for discharge outlet and actuating means therefore Valve means are provided in a discharge opening movable between a closed position blocking communication between a hopper compartment and a discharge conduit. The valve means comprises a segment of an arc which in a closed position spans the distance betw... | 03/20/1984 |
| 3931768 | Hopper vehicle A novel hopper vehicle, illustratively a freight hopper car, has a floor with two longitudinal hoppers and a pair of side-opening doors on opposite sides of the center line of the vehicle. Each door provides a part of one of the hoppers and is pivotally m... | 01/13/1976 |
