Method and device for boring holes
US6145601A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0053
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process and device for boring holes in soil or rocks, in particular for percussion or rotary percussion boring. A bore hole is formed by an annular drill bit mounted on boring rods and at the same time a jacket tube which surrounds the boring rods with a certain gap is introduced. The annular drill bit is flushed during boring by a flushing medium fed into the annular gap defined between the boring rods and the jacket tube. When boring is completed, a setting suspension is fed into the annular gap to form an anchorage with the boring rods. An anchorage can thus be obtained in a simple and reliable manner immediately after a bore hole is completed, in particular in loose or slack material, by a device having a simple design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.