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| Number | Title | Issue Date |
| 7819067 | Hopper car gate with a curved door A hopper car gate with a curved door for discharging cargo from a hopper car. The gate has coupled side walls and end walls which present a top opening, bottom opening, and upper surface surrounding the top opening and adapted to be joined to the hopper car. A curve... | 10/26/2010 |
| 7814842 | Hopper car gate with a laterally opening door A hopper car gate for discharging cargo from a hopper car having a length greater than its width. The gate has opposed generally upright side walls and opposed generally upright end walls coupled with the side walls. The coupled walls present a top opening and a bot... | 10/19/2010 |
| 7806057 | Hopper car gate with opposed double doors A hopper car gate with opposed double doors for discharging cargo from a hopper car. The gate has joined side walls and end walls which present top and bottom openings. A flange joined to the walls adjacent the top opening is adapted to be joined to the hopper car. ... | 10/05/2010 |
| 7752979 | Hopper car gate with enlarged discharge and increased capacity A hopper car having an increased volume. The car has side walls, end walls, a bottom, and first and second sloping surfaces. The bottom lies at least partially in a horizontal plane and includes a plurality of spaced apart openings. The side walls, end walls, and ho... | 07/13/2010 |
| 7367271 | Railway hopper car discharge gate A railroad hopper car discharge gate is assembled from unitary stacked frames that provide unimpeded flow of lading during discharge. A low-wear glide system minimizes friction between the gate panels and other components of the apparatus, and an improved sealing sy... | 05/06/2008 |
| 7171907 | Drive system for a railway hopper car discharge gate A drive system for a railway hopper car discharge gate includes a door panel operated by a rack and pinion drive. The pinion teeth present a substantially cylindrical profile in a plane orthogonal to the axis of pinion rotation. The cylindrical tooth profile substan... | 02/06/2007 |
| 7124693 | Railway car outlet gate assembly An outlet gate assembly has upper and lower gate assemblies with independent drive mechanisms to open and close the gates. The drive mechanisms may be rack and pinion drives. The racks for the lower gate do not enter the gate cavity. The outlet gate assembly can be ... | 10/24/2006 |
| 6571718 | Railway car outlet gate assembly An outlet gate assembly has upper and lower gate assemblies with independent drive mechanisms to open and close the gates. The drive mechanisms may be rack and pinion drives. The racks for the lower gate do not enter the gate cavity. The outlet gate assem... | 06/03/2003 |
| 6412251 | Web core structural panel A panel system includes a first skin, a second skin, a web core constructed from sheet material for securing the skins together in a spaced, sandwich relationship, and a connecting means for affixing the web core within the skins. The web core includes a ... | 07/02/2002 |
| 6374750 | Structural panel system A panel system includes a first skin, a second skin, a web core constructed from sheet material for securing the skins together in a spaced, sandwich relationship, and a connecting means for affixing the web core within the skins. The web core includes a ... | 04/23/2002 |
| 6092471 | Curved rail cover actuator An actuator automatically opens and closes the covers of a railroad hopper car as the car enters a loading/unloading station. The opening actuator includes a support frame disposed along a railroad track at the station that extends upwardly above the rail... | 07/25/2000 |
| 6085664 | Vented hatch cover A vented hatch cover for a container having an opening defining a hatch and a coaming on the container's exterior surrounding the hatch opening. The cover has an outer shell and an inner shell, each shell having a main body and a flanged portion. The bodi... | 07/11/2000 |
| 5979139 | Lightweight, self-supporting paneling A paneling system includes a first upper or outer plate having a plurality of outwardly extending tabs unitarily and integrally formed therewith and a second, lower plate spaced apart from the upper plate to present a void therebetween. The tabs span the ... | 11/09/1999 |
| 5697121 | Railroad car hatch cover lock A double hinge locking system mounts and secures a series of two-way opening covers or similar members. Each hinge/lock component of the system provides a combination hinge pivot and associated lock that operate on a common axis, and includes a locking de... | 12/16/1997 |
| 5572932 | Railcar hatch cover A hatch cover assembly for railcars. The assembly includes a series of hatch covers aligned end to end to cover an opening in a railcar. Each of the hatch covers has an overlapping end section which seats upon an adjacent cover to provide a seal. The end ... | 11/12/1996 |
| 5517925 | Railroad car hatch cover system A hatch cover system for a railroad car employs a longitudinally extending series of end-to-end main hatch covers wherein each adjacent pair of covers has proximate, concave ends defining a circular port that permits access to the interior of the car when... | 05/21/1996 |
| 5355808 | Battenless railcar hatch cover assembly A battenless hatch cover assembly for railcars. The assembly includes a series of hatch covers aligned end to end to cover an opening in a railcar. Each of the hatch covers is hinged along one side to the railcar, with this one side being common among the... | 10/18/1994 |
