Safety sign post with breakaway connection
US5957425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1996 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Mar 13, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S248/90
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A breakaway safety sign support post for obtaining predictable and reliable separation of an upper post section from a lower post section anchored in a substrate, when the post is struck by a vehicle. In a specific construction, the lower post section is adapted to be imbedded in the ground, with an upper end projecting a predetermined limited distance above the surface of the ground. The upper, post section is secured in overlapping, parallel relationship with the lower post section and is secured thereto with frangible fasteners to define a breakaway joint. The post sections each have a U-shaped transverse cross-sectional shape, including a longitudinal center web with a plurality of holes spaced uniformly along its length, and outwardly divergent side walls at opposite sides of the web, terminating in laterally outwardly projecting flanges. When nested together in overlapping relationship, the outwardly divergent side walls lie in surface-to-surface contact with one another and the webs are in spaced apart relationship. In accordance with the invention, an elongate spacer bar is engaged between the spaced apart webs and is secured to the post sections by the fasteners extended t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.