Pneumatic rock-boring device and method for starting such a device
US7093671B2 · kind B2 · utility
11Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2001 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Nov 30, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a method for horizontal ground-boring, in particular for rock-boring, by a rotating and hammering driven ground-boring device, whereby the device is alternately or simultaneously supplied with compressed air and drilling medium and the compressed air and drilling medium are supplied through a channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.