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| Number | Title | Issue Date |
| 7011253 | Engineered railroad ties To increase the resistance of plastic and/or plastic composite railroad ties tosliding within the ballast of the railroad bed, for example, sliding lengthwise (in the direction of the longitudinal axis of the tie) and sideways (in the direction perpendicular to the ... | 03/14/2006 |
| 6191228 | Use of recycled plastics for preparing high performance composite railroad ties A method of maintaining proper distance between railroad rails is disclosed. The method utilizes railroad ties manufactured from a composite of polystyrene and polyolefin components, preferably obtained from recycled plastics. The composite exhibits a dua... | 02/20/2001 |
| 5722589 | Composite load bearing structure A composite load bearing structure comprises a main body portion having a top surface and a bottom surface defining a dimension of thickness therebetween, first and second side surfaces defining a dimension of width therebetween, first and second end surf... | 03/03/1998 |
| 5609295 | Composite railway tie and method of manufacture thereof A composite railway tie, and process for manufacture thereof, is disclosed. The composite railway tie comprises a main body portion being made of a first composite material comprising a binding constituent in a proportion of about 10% to about 20% by volu... | 03/11/1997 |
| 5314115 | Rail cross-tie for LIM transit system A rail tie has a pair of rail supporting portions disposed on opposite sides of a central portion. The central portion is elevated relative to the central portion and supports a reaction rail of a linear induction motor used to propel a vehicle along the ... | 05/24/1994 |
| 5104039 | Railroad tie A railroad tie 10 is described. The tie includes elongated side surfaces 23 with a plurality of ballast locking indentations 34 formed therein. The indentations converge from open upward ends 35 to reduced bottom ends 36. The configuration of the locking ... | 04/14/1992 |
| 4802623 | Concrete cross sleeper system Modern D.C.-tractioned trains and track circuit signal systems as well as high load trains need a special track construction. A new concrete cross sleeper system is provided for high load and high velocity tracks as well as for urban rapid transit systems... | 02/07/1989 |
| 4718603 | Anchor for a railway tie embedded in ballast Anchor for a railway tie embedded in ballast. In order to further simplify the installation of such an anchor, the clamp is constructed in two or more parts. With an anchor construction having a clamp gripping the tie on both sides, the clamp parts are co... | 01/12/1988 |
