Process and device for drilling the soil
US4542796A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1983 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | May 23, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/205
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns itself with a process and a device for drilling the soil, more particularly but not exclusively, for the purpose of laying pipelines. A guide block (26) that slides on means that form a slide bar (27, 28) parallel with the direction of drilling (43) in relation to a skelton (29) under the action of pressing means (37, 38) acting between the skeleton (29) and the guide block (46) internally delimits a housing (46) at least partly closed towards the rear and laterally and open towards the front in reference to the direction of drilling (43) for receiving means that form a tube (20) having a rectilinear axis (44) and an end zone (19) projecting towards the front and supporting a detachable tool (6) consisting of a boring bit (6) having externally, successively from the front to the rear, a flat cutting edge (52) across the axis (44) of the tube (20), a frustoconical cutting edge (16) converging towards the front with reference to the direction of drilling (43) and a cylindrical cutting edge (17) that joins said frustoconical cutting edge. It is applied to the mechanical industry and to public works.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.