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| Number | Title | Issue Date |
| 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 |
| 5593051 | Slackless cushioning device for railroad cars A railroad car coupling mechanism is described as having a yoke which is disposed within, I) a carsill which is attached to the underside of a railroad car adjacent each of the opposing ends of the car, and II) a striker which is secured to the subsill an... | 01/14/1997 |
| 5351844 | Elastomeric spring unit A compression spring formed of an elastomer having a ratio of plastic strain to elastic strain that is greater than 1.5 to 1, the elastomer having a having a projection extending through a metal plate and being cold formed into a rivet-like head to define... | 10/04/1994 |
