Polymer based railroad tie shaped to reduce center bounding
US9121138B2 · kind B2 · utility
1Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Feb 17, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B3/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A railroad tie composed of an immiscible polymer blend having a portion of the underside curved orthogonal to the longitudinal axis of the tie or curved both orthogonal and parallel to the longitudinal axis of the tie, forming a saddle shape, for purposes of reducing the center bounding problems encountered in prior art synthetic railroad ties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.