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| Number | Title | Issue Date |
| 7252039 | Ballast discharge car A ballast discharge car having at least one non-pivoting transverse conveyor disposed beneath a hopper for distributing the ballast between the rails, near the outside of the rails, and well beyond the outside of the rails in a stockpiling application. The speed, di... | 08/07/2007 |
| 6698115 | Clearing chain for excavating bulk material A clearing chain is mounted on a mobile track maintenance machine for excavating ballast material from a track bed. The chain is composed of shovel-type clearing members for gathering the ballast and intermediate chain elements positioned between the adja... | 03/02/2004 |
| 5664633 | Machine for treating a ballast bed A machine for treating a ballast bed underneath a track comprises a machine frame extending in a longitudinal direction and supported on the track by undercarriages for movement in an operating direction, a suction unit mounted on the machine frame, the s... | 09/09/1997 |
| 5201127 | Self metering ballast system A ballast metering method and apparatus is disclosed which utilizes a rail mounted metering hopper having a set of forward discharge outlets for directing ballast laterally and downwardly beneath the rails under the pressure of a volume of ballast retaine... | 04/13/1993 |
| 5029649 | Ballast reconditioning apparatus Apparatus for excavating ballast from a railroad bed and for cleaning the excavated ballast for return thereof to the railroad bed. The apparatus includes a vehicle for supporting a pair of excavating assemblies on opposite sides of the support vehicle an... | 07/09/1991 |
| 4967847 | Method and apparatus for cleaning ballast An articulated ballast cleaning system utilizes a pair of ballast cleaners each dedicated to cleaning only a portion of the ballast bed of a railroad track, such that one cleans the peripheral ballast while the other cleans the center ballast. Spoil or wa... | 11/06/1990 |
| 4799430 | Mobile ballast cleaning apparatus A mobile ballast cleaning apparatus comprises a first and a second work vehicle. A track lifting device and a vertically adjustable ballast excavating and conveying chain are mounted on the first work vehicle, and a ballast screening installation for sepa... | 01/24/1989 |
| 4635664 | Mobile ballast cleaning machine A mobile cleaning ballast machine comprises an elongated machine frame; an endless ballast excavating and conveying chain adjustably mounted on the machine frame; and a ballast screening installation arranged to receive the excavated ballast conveyed by t... | 01/13/1987 |
| 4530403 | Ballast cleaning machine A mobile ballast cleaning machine comprising an endless ballast conveying chain movable in a conveying direction, the chain having arranged sequentially in the conveying direction a transverse chain section for excavating the ballast, an upwardly extendin... | 07/23/1985 |
| 4133388 | Ballast cleaning and levelling machine The present invention relates to ballast cleaning and leveling machines which ensure in succession the extraction of the old ballast, the screening of said ballast for separating the good re-usable ballast from the earth, the fine and the coarse parts, an... | 01/09/1979 |
| 4014389 | Endless ballast conveyor chain The chain tensioning device for an endless ballast conveyor chain comprises a first, transverse chain guide for a stringer arranged to extend transversely of the track and therebelow and two longitudinally extending, pivotal chain guides rising from the t... | 03/29/1977 |
| 4004524 | Method of renewal of a railroad track and train therefor The complete renewal of a railway road track, i.e. clearing and screening the ballast, and substituting new ties and rails for the old ones, comprises a continuous sequence of operations forming repeating cycles consisting in removing the old track, clear... | 01/25/1977 |
