Method and apparatus for unloading ribbon rails from rail cars
US6981452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Jan 3, 2006 |
| Priority date | — |
| Expiry date | Feb 6, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B29/17
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for unloading long ribbon rails which are carried on a transport car on bunks which hold the rails in four or five different tiers each containing eight to ten rails. A special railcar is equipped with a gantry crane which feeds the rails from the bunks into power driven thread boxes. The thread boxes grip the rails and feed them rearwardly onto the railway bed. After the first two rails have been unloaded side by side, the next pair are fed into the thread boxes. The thread boxes feed these rails out of the bunks as the train is moved forwardly at the same speed as the rails are fed rearwardly so that the rails are unloaded end to end with the first pair of rails. The railcar has retractable over the road wheels that allow it to be towed on the roadway to the site of the rail transport car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.