Tie replacer and method
US5048424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Apr 20, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B29/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A vehicle for replacing selective ties in a road bed uses a conveyor system whereby ties may be picked up from on top of the rails. If the ties are to be used by the particular vehicle, they may be held by that vehicle. On the other hand, the conveyor system allows ties to pass over top of the vehicle such that the ties will be again disposed on top of the rails such that a following tie replacement vehicle may use the ties. By use of a tie replacement or inserter head having two tie clamps, one can more quickly remove an old tie from underneath the rails and replace the old tie with a new tie which has been picked up from on top of the vehicle. Electromagnets are used to hold the tie plates against the rails during the selective replacement of particular ties such that replacement of the tie plates is not usually necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.