Rock bolt
US7963725B2 · kind B2 · utility
5Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2004 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Aug 20, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0073
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock bolt (10) which includes An elongate tubular member (18), which is formed with an inlet (22) through which a pressurized fluid can pass, into an interior of the tubular member (18), thereby to expand the tubular member (18) in a radial direction, an elongate shank (12) with a first end (14) which is secured to the tubular member (18) and a second end (16), and an expansion unit (26) which has a wedge-shaped member (44) at the second end (16) of the shank (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.