Capped highway grade crossing
US4899932A · kind A · utility
6Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Apr 19, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C9/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved highway grade crossing for railroad tracks. The crossing is comprised of a plurality of wood panels which are capped with an expanded polymer. The polymer provides a wear surface for the crossing which can be replaced without having to take up the entire crossing structure. In one embodiment the polymer cap is a rubber and steel composite. The steel keeps the rubber stretched to substantially avoid temperature induced expansion and buckling of the rubber. Deterioration resulting from vehicular traffic over a buckled surface is thus avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.