Reusable yielding post supports
US4021977A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1976 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Mar 19, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/685
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Posts, such as roadside delineators and sign supports are mounted upright from the ground by tubular anchors driven into the ground from their leading ends and having fins on their trailing ends embedded in the ground adjacent the surface thereof. A break-away support tube is secured in the tubular anchor to extend upright therefrom into a rigid but yieldable plastic tube with an elastic memory. The plastic tube carries a reflector, a sign, or the like at a level above ground which will attract the attention of drivers of vehicles on the roadway. The break-away tube is pierced at ground level just above the ground anchor so that when the plastic post is struck by a vehicle, the break-away tube will fracture at ground level permitting the plastic post to be forced to the ground without flying loose from the ground anchor and without springing back to damage the vehicle. The tubular ground anchor can receive an extension tube driven into the ground ahead of the leading end thereof to provide additional anchoring capacity in light soil ground conditions. The lower end of the break-away tube is wedged or clamped in the tubular ground anchor and the lower end of the plastic post is wedg…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.