Ram boring device
US9016404B2 · kind B2 · utility
3Cited by
19References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2010 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Oct 6, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/145
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a ram boring device for creating horizontal boreholes, having an impact piston which moves in an oscillatory manner within a casing of the ram boring device and of which the impact frequency or impact intensity can be varied by displacing the center position of the impact piston inside the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.