Sucker rod
US4602892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/47
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention envisions a concentric structural combination of elements, consisting of an elongate core component, which is terminated at each end on the internal surface of a chambered coupling, and a elongate sheath component which consists of an interlaced configuration of assemblies of non-metallic filamentary elements embedded in a polymer matrix, the sheath component being bonded at each end to the external surface of the coupling, the load-elongation characteristics of the core and sheath components being chosen so as to ensure that both components share substantially in the load-bearing under the working load conditions, with at least 50% of the load being borne by the aggregate of the non-metallic elements, and the sheath and matrix being disposed so as to substantially cover and protect the core and coupling components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.