Engineered railroad ties
US7011253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2001 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Nov 16, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B13/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
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 longitudinal axis), ties with a textured surface which aids in anchoring the ties within the ballast of the railroad beds. In particular, the ties are provided with a pattern of indentations within a surface that contacts the ballast which increases the ties resistance to sliding. The pattern is molded into the ties so as to mechanically interact with the ballast (rocks) and provide as much resistance to sliding as possible, especially along the longitudinal axis of the tie but also in the direction perpendicular to the longitudinal axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.