| Patent Number |
Title Of Patent |
Date Issued |
| 7337859 |
Method and device for drilling a channel |
March 4, 2008 |
| In a drilling method for creating a channel leading from surrounding soil into a shaft which is separated from the soil by a wall, a channel is drilled through the soil from a starting pit in the direction of the shaft using a first drill head. The first drill head continues to drill |
| 7316280 |
Method for producing earth boreholes |
January 8, 2008 |
| In a method for producing and widening ground bores or for the destructive replacement of buried lines with the aid of a tool arranged at the end of a rod driven by a boring device, the rod is built up from individual sections which are to be connected to one another in a machine excavat |
| 7270197 |
Steerable soil displacement hammer |
September 18, 2007 |
| The invention relates to a steerable soil displacement hammer for horizontal ground boring, comprising a body that can be rotated by means of a longitudinal element, and a thrust head that is mounted rotationally in relation to the body. A rotation of the body in relation to the thrust |
| 7172370 |
Cutting system, device, and method for splitting pipes |
February 6, 2007 |
| A cutting system for splitting pipes includes a main body and at least one blade and at least two blade mount assemblies by which the blade may optionally be connected to the main body. The first blade mount assembly, in a particular fitted state, holds the blade at a different distance |
| 7093677 |
Percussion drill head |
August 22, 2006 |
| The invention relates to a method for horizontal drilling with a percussion implement and a percussion head or percussion head element mounted in a movable manner relative to the percussion implement, the percussion impulse being transmitted in at least three steps. |
| 6814165 |
Hard rock drilling device and method |
November 9, 2004 |
| Method and apparatus for underground drilling and enlarging of holes, in particular in hard rock, by using a water-driven motor as drive unit. |
