Rock stabilizer
US7073981B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 30, 2004 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Jul 30, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock stabilizer includes a metal tube with a tapered distal end and a flanged proximal end capable of being positioned within a bore in a mine wall. A slit runs substantially the entire length and indentations are formed in the outer surface along the length adjacent the slit so that grout pumped into the interior of the tube flows out of the slit and into the indentations. An expander wedge within the tube adjacent the distal end is actuatable from the proximal end after the stabilizer is installed in a bore. The wedge expands the distal end of the tube to firmly anchor the stabilizer in the bore. The expander wedge is formed of one wedge welded to the interior of the tube and a second wedge moveable toward the fixed wedge. The two wedges are temporarily maintained together in the interior of the tube before actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.