Drilling tool
US8020323B2 · kind B2 · utility
6Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2007 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Jul 24, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/205
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a drilling tool comprising: two pairs of rotary drums in axial alignment on parallel axes; a motor mechanism for driving rotation of the drums; a support element; and a support structure on which the drums are mounted to rotate and serving to connect the drums to the support element; the tool being characterized in that the motor mechanism is mounted inside the drums and in that the support structure comprises a plate forming bearings at its bottom ends for the drums; and a mounting pad for fastening to the support element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.