Energy absorbing guardrail terminal
US4655434A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1986 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Apr 24, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/63
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An energy absorbing guardrail terminal having a plurality of horizontally extending parallel guardrails on opposite sides of breakaway posts in which the guardrails have overlapping ends and the upstream ends are secured to the posts. Splice bolts connect the overlapping ends of adjacent rails and a plurality of spaced openings are provided in each rail horizontally aligned with each of the splice bolts whereby the impact of a vehicle on the upstream end of the rails will shred out the rail material between the spaced openings to absorb the kinetic energy of the impacting vehicle. Preferably the openings are slots elongated in the horizontal direction and the rails are staged to allow the upstream rails to telescope over the downstream rails.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.