Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 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 |
| 7171908 | High/Low passenger ingress and egress conversion for transit vehicle A passenger ingress and egress system within a transit vehicle having a stairwell employs a movable platform apparatus in combination with at least one door of a sliding or plug type to accommodate variations in passenger ingress and egress platform facilities. The ... | 02/06/2007 |
| 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 |
| 6363863 | Gate assembly for a railroad hopper car A discharge gate assembly for a railroad hopper car is disclosed. The gate assembly includes a frame defining a discharge opening and a gate or first element slidably carried on the frame for controlling the discharge of material from the hopper car throu... | 04/02/2002 |
| 6263803 | Gate assembly for a railroad hopper car A gate assembly for a railroad hopper car is disclosed. The gate assembly includes a frame defining a discharge opening, a slidable door mounted on the frame for movement between a closed position, wherein the door closes the discharge opening, and an ope... | 07/24/2001 |
| 6073562 | Railway car outlet gate assembly with compact inertial latch An outlet gate assembly for a hopper type railway car includes a frame adapted to be mounted on an outlet opening in the rail car and a gate in the frame. A conventional rack and pinion opening and closing drive moves the gate between open and closed posi... | 06/13/2000 |
| 6012397 | Railway car outlet gate assembly with inertial latch An outlet gate assembly for a hopper type railway car includes a frame adapted to be mounted on an outlet opening in the rail car and a gate in the frame. A conventional rack and pinion opening and closing drive moves the gate between open and closed posi... | 01/11/2000 |
| 5829359 | Railway hopper car discharge gate assembly A discharge gate assembly for a railway hopper car that satisfies the new AAR requirements and specifications and includes a frame defining a generally rectangular discharge opening with a gate slidably mounted on the frame for endwise horizontal movement... | 11/03/1998 |
| 5671684 | Railway car outlet gate assembly with automatic lock An outlet gate assembly for a hopper type railway car includes a frame adapted to be mounted on an outlet opening in the rail car and a plate in the frame. An integrated rack and pinion drive moves the plate between open and closed positions on the frame.... | 09/30/1997 |
| 5613446 | Railway hopper car gate valve and operating assembly A gate valve assembly and a frame assembly for mounting the gate valve assembly on the discharge opening from a railway hopper car. The gate valve assembly includes an operating assembly for movement of a valve member within the gate valve assembly betwee... | 03/25/1997 |
| 5584251 | Railway car outlet gate assembly with automatic lock An outlet gate assembly for a hopper type railway car includes a frame adapted to be mounted on an outlet opening in the rail car and a plate in the frame. An integrated rack and pinion drive moves the plate between open and closed positions on the frame.... | 12/17/1996 |
| 5448955 | Gravity outlet latching mechanism A gravity outlet (10) for discharging lading from a railway car (C). An outlet assembly attached to a discharge opening in the railcar includes an upper end attached to the opening and sidewalls (12a, 12b) and endwalls (14a, 14b) whose bottom portion defi... | 09/12/1995 |
| 5263422 | Protected gate lock for hopper cars Hopper apparatus for controlling the discharge of lading from a hopper of a railway car through an opening in which a door opens and closes the opening and is moved from the closed position to the opening position by rotatable gears and by racks attached ... | 11/23/1993 |
| 4765517 | Valve arrangement with retainer bracket, for hopper car outlet gate A railway hopper car has a pneumatic discharge structure having a throat leading to a control tube from which lading is pneumatically withdrawn. The throat is opened and closed by valve plates supported on the ends of rods extending through bearings suppo... | 08/23/1988 |
| 4617868 | Railroad hopper car with self-contained discharge system A railroad hopper car particularly adapted for shipment of dry, granular-like commodities may have its inner space divided into compartments which in turn are formed with chambers. Each chamber bottom includes a discharge system comprising a pair of align... | 10/21/1986 |
| 4450773 | Sliding gate for a railroad hopper car The slide gate includes a closure door for selectively closing a discharge opening at the underside of a hopper car. The closure door is mounted for horizontally sliding movement in a support assembly which is mounted on the underside of the hopper car. T... | 05/29/1984 |
| 4388026 | Hopper discharge outlet An enclosed railroad car has hoppers at its underside for unloading a solid commodity. A pneumatic outlet trough is opened and closed by a slide valve or gate that is attached to operating rods supported in slide bearings. The gate can be safely removed f... | 06/14/1983 |
| 4301741 | Hopper car outlet gate assembly with self cleaning gear and rack actuation arrangement An outlet gate assembly for application to hoppers of railroad hopper cars that is equipped with a self cleaning rack and gear door plate actuation arrangement, in which the outlet gate assembly includes a frame defined by a pair of spaced apart longitudi... | 11/24/1981 |
| 4214536 | Hopper outlet having vertically movable door bearing In accordance with the present invention a hopper outlet is provided including transversely spaced, fixed racks on opposite sides of the outlet which extend longitudinally away from the outlet. At least one door bearing is attached to the outer end of a g... | 07/29/1980 |
| 4207822 | Hopper car outlet gate assembly In accordance with the present invention a railway hopper car unloading arrangement is provided, including at least one hopper having hopper slope sheets extending downwardly and inwardly. A standard outlet frame is attached to the inner ends of the hoppe... | 06/17/1980 |
| 3933100 | Hopper gate actuating mechanism This application discloses a sliding gate the top surface of which is tapered so that as it is closed the top surface will compress against a first elastomeric sealing means to eliminate lading leakage, and move away from the lading as the gate is opened,... | 01/20/1976 |
