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| Number | Title | Issue Date |
| 7150368 | Cushioning device having an electrically actuated lockout A rail car cushioning1 device is provided for connecting to a coupler. The rail car cushioning device includes an arrangement of a hydraulic cylinder, a piston assembly, and at least a valve assembly, which are configured with cooperating features to allow the devic... | 12/19/2006 |
| 6845874 | Collision attenuating system A collision attenuator for a vehicle including an energy absorbing cylinder, a mounting assembly adapted to secure the energy absorbing cylinder to an end of the vehicle, a contact plate mounted to the energy absorbing cylinder, a control valve for extending and ret... | 01/25/2005 |
| 6814246 | Collision attenuating system A collision attenuating system for a moving vehicle including an energy-absorbing airbag assembly dimensioned and configured for attenuating the impact between the moving vehicle and a pedestrian or an impacted vehicle located in or crossing the path of the moving v... | 11/09/2004 |
| 6669180 | Gas-hydraulic shock absorber assembly The gas-hydraulic shock absorber assembly comprises a sleeve member and a ram member movable relative to the sleeve member. In the interior of the ram member, a gas chamber is provided that is pressurized by means of a gas. In the interior of the sleeve m... | 12/30/2003 |
| 6619491 | Collision attenuator A train collision attenuator mounted on a leading end of a train for attenuating the force of impact between a moving train and a pedestrian or motor vehicle. The train collision attenuator includes an energy absorbing assembly and a mounting assembly. Th... | 09/16/2003 |
| 6279765 | Railcar cushioning device with internal spring A railcar cushioning device with a gas charged cylinder and a piston contained in the cylinder for cushioning buff and draft impacts. A spring assembly is contained in the cylinder between the piston and an end of the cylinder to locate the piston in a ne... | 08/28/2001 |
| 6047839 | Rail car buffer A rail car buffer with a capsule body and a mechanical ring spring and a hydraulic spring arranged in parallel in the body. The hydraulic spring includes an internal reservoir to receive hydraulic oil displaced during collapse of the buffer.... | 04/11/2000 |
| 5927523 | Rail car buffer A rail car buffer includes a standard capsule body and a high pressure hydraulic buffer spring only in the body. The hydraulic spring has a high compression ratio and is charged with very high pressure gas and hydraulic oil.... | 07/27/1999 |
| 5908123 | Rail car buffer and method A rail car buffer has a capsule body and a spring assembly with an elastomer spring and a gas filled hydraulic spring in the body. Expansion of the buffer after collapse is snubbed by the gas filled hydraulic spring to convert energy stored in the elastom... | 06/01/1999 |
| 5653425 | Energy absorbers A railway buffer capsule comprising a hollow cylindrical plunger slidably mounted in a cylinder. The cylinder is closed at one end. The plunger is closed at its outer end, and in its inner end is formed a fixed area orifice of flow restricting dimensions.... | 08/05/1997 |
| 5586669 | Cushioning unit fault detector A railcar cushioning device for absorbing impact between railcars is provided having a hydraulic cylinder containing hydraulic fluid. A piston locates within the cylinder and is movable relative to the cylinder between an extended position and a contracte... | 12/24/1996 |
| 5469978 | Condition indicating system for railway car cushioning unit A system for indicating whether a hydraulic--pneumatic cushioning unit mounted on a railway car to cushion impacts contains sufficient hydraulic fluid to cushion impacts includes a signal assembly mounted on the body of the cushioning device, the signal a... | 11/28/1995 |
| 5160123 | Velocity-controlled railway buffer A buffer for railway vehicles includes a plunger telescopically received within an outer cylinder. An internal speed control valve, essentially independently of the forces acting on the buffer, causes the buffer to move inwardly at a predetermined initial... | 11/03/1992 |
| 4805517 | Gas return railway car hydraulic cushioning unit and method of converting a spring return unit A railway car hydraulic cushioning unit prevents the mixing of gas and hydraulic fluid in chambers interiorly and exteriorly of a high pressure cylinder unit by strategic placing of metering ports through the cylinder wall at positions below the level of ... | 02/21/1989 |
| 4205753 | Hydraulic buffer for a vehicle A hydraulic buffer for a vehicle, the buffer including a piston and cylinder arrangement in which the piston is displaced by the pressure of hydraulic fluid, the hydraulic fluid being contained in a chamber defined by the piston and cylinder, the chamber ... | 06/03/1980 |
| 4054311 | Energy absorber with internal pressure relief valve Energy absorbing unit for vehicle bumper support having inner and outer telescoping cylinders with primary valve for metering fluid between a pair of contractible and expansible fluid chambers to dissipate impact energy. An auxiliary pressure relief valve... | 10/18/1977 |
| 4054312 | Telescoping energy absorber with elastomeric pressure relief valve This energy absorber has an inner cylinder telescopically mounted in an outer cylinder and carries a cylinder cap separating cylinder interspace into a pair of contractible and expandable pressure chambers filled with a hydraulic fluid. On impact, the cyl... | 10/18/1977 |
| 4040523 | Railway car cushioning device An end-of-car hydraulic pneumatic cushioning device for connecting to the coupler of a railway car having a piston mounted within a cylinder and a piston rod secured to the piston extending rearwardly from the cylinder. The piston divides the cylinder int... | 08/09/1977 |
| 3993294 | Hydropneumatic shock absorber A hydropneumatic shock absorber for use between a bumper and the chassis of a motor vehicle has a cylinder and a plunger guided in the cylinder by the radially enlarged inner end portion of the plunger and by an annular sealing assembly which axially boun... | 11/23/1976 |
| 3944270 | Hydropneumatic shock absorbing mounted bumper The bumper of a vehicle is secured to the vehicle chassis by shock absorbers having each a cylinder attached to the vehicle chassis and a hollow piston assembly attached to the bumper. Liquid in the cylinder communicates with liquid in the piston assembly... | 03/16/1976 |
