Recycled rubber railroad crossties
US6766963B2 · kind B2 · utility
13Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Nov 7, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the manufacture of a railroad crosstie (90) from recycled rubber is disclosed. The rubber crosstie (90) has an expected life of between 30 to 60 years and can be made primarily of rubber crumbs obtained from stockpiles of discarded rubber tires. A feature of the invention is to produce a crosstie (90) having at least one longitudinal side incorporating a plurality of indentations for more effective engagement upon installation into a gravel bed to avoid slippage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.