Tubular tapered composite pole for supporting utility lines
US6286281A · kind A · utility
Inventor
Key dates
| Filing date | May 13, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | May 13, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/1993
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubular tapered composite pole for supporting utility lines and a method for making the same. The pole is formed from a plurality of elongated panels made of pultruded composite material having a height H1 in the range of 30 feet-120 feet. An interlocking structural groove is formed on one of the side edges of the panel during the pultrusion process. The other side edge of the panel is formed by a biased angle cut from the bottom edge of the panel to its top edge to give it a generally trapezoidal shape. A tongue shaped interlocking structure is machined along the length of the angularly cut side edge. The panels have a length L1 along their bottom edge in the range of 6"-24" and a length L2 along their top edges in the range of 3"-16". The respective tongue and groove structure along the side edges of the panels is interlocked together to form a closed loop extending from their top edges to their bottom edges to form the tubular tapered pole. The special double structural groove, known as a fir tree joint is designed to allow insertion elastically, and then provide significant clamping pressure once interlocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.