Friction rock stabilizers
US4012913A · kind A · utility
Inventor
Key dates
| Filing date | Oct 3, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | Oct 3, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/004
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Friction rock stabilizers for anchoring a structure such as a roof or side wall of a mine shaft or other underground opening, comprising a generally annular body having longitudinally extending edge portions which overlap one another circumferentially of the body and are relatively movable to permit substantial circumferential compression of the body. The body is circumferentially compressed for installation in a bore of diameter substantially smaller than the normal maximum outer diameter of the body whereby, after such installation, the resilience of the body causes the body outer circumference to anchor by frictional engagement with the surrounding wall of the bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.