Geogrids
US5267816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Dec 3, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D28/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A starting material is stretched longitudinally to produce a geogrid. The starting material has pronounced ribs on each face, merging into sloping sides. Between the ribs, there are holes on a square grid. The mean thickness of the longitudinal elements is substantially greater than the mean thickness of the interconnecting elements, and the cross-sectional area of the longitudinal elements is at least 2.5 times the transverse cross-sectional area of the interconnecting elements. The longitudinal elements are stretched out into continuous oriented strands. The centers of the junctions reduce in thickness by at least 10% but substantially less than the percentage reduction at the thinnest part of the strand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.