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| Number | Title | Issue Date |
| 6976324 | Method of scanning a track bed profile A method for the contactless scanning of a track bed profile extending perpendicularly to a longitudinal extension of the track, comprises the steps of simultaneously effectuating the scanning and a measurement of any deviation from a desired track level at a locati... | 12/20/2005 |
| 5577446 | Stoneblower having adjustable workheads and improved blowing tubes A stoneblower having a workhead and associated blowing tubes that adjust to skewed ties and to nonvertical tie faces. The workhead provided several degrees of movement to the blowing tubes, enabling them to be individually aligned with each tie along the ... | 11/26/1996 |
| 4703890 | Components for ballast-less railroad lines laid on pre-fabricated reinforced concrete slabs Ballastless railroad lines are laid on prefabricated reinforced concrete slabs, which can eliminate the need for periodic maintenance of the ballast of traditional railroad lines, such maintenance being expensive and often difficult to carry out. Prefabri... | 11/03/1987 |
| 4528912 | Track leveling method In a method for automatically leveling a track comprised of two rails fastened to a succession of ties supported on a ballast bed to establish a desired track level, wherein successive track sections including a respective one of the ties are consecutivel... | 07/16/1985 |
| 4497256 | Mobile track position correction machine A mobile track leveling machine comprises a pneumatic arrangement for introducing additional ballast into a gap between a track bed and a lifted track, which includes a storage container for the ballast, a vertically adjustable pipe arranged to receive ba... | 02/05/1985 |
| 4386570 | Maintenance of railway track A method of re-levelling railway track of the kind having rails fastened to sleepers supported on a ballast bed is disclosed. The method comprises lifting the sleepers off the ballast bed and pneumatically placing ballast stones by an air stream in the ga... | 06/07/1983 |
| 4232822 | Method of and arrangement for correcting the height of railway upper structures A method of and arrangement for correcting the height of a railway upper structure with a reinforced concrete plate thereon into which plate a reinforced concrete part as support for rail holding members is so inserted that the reinforced concrete part is... | 11/11/1980 |
| 3955761 | Method for providing a vehicular supporting deck for a railroad grade crossing A method and apparatus for forming a railroad grade crossing comprising a vehicular supporting structure formed by a plurality of precast slabs fixedly located between and on opposite sides of a pair of running rails. A variety of slabs are provided for a... | 05/11/1976 |
| 3942448 | Apparatus for consolidating ballast A track or switch tamping machine wherein the machine includes tamping and ramming units having longitudinal ducts for injecting liquid binder into the ballast. The longitudinal ducts terminate in a plate or cavity within the lower portion of the tamping ... | 03/09/1976 |
| 3939774 | Apparatus for bonding together pieces of track ballast While a tamping unit with tamping tools for tamping track ballast is lowered to immerse the tamping tools in the ballast and to tamp the same, a metered amount of a liquid bonding medium is delivered to and through internal conduits in the tamping tools a... | 02/24/1976 |
