| Patent application number | Description | Published |
|---|
| 20080245573 | Thread Retention - The invention relates to an earth boring device including a housing which has at least one portion with an inner thread, and a threaded element which has a corresponding outer thread, wherein the threaded element is slotted and has a receptacle for a securing element which increases the outer diameter of the threaded element and the contact pressure of the threaded connection between threaded element and housing, when inserted in the receptacle. | 10-09-2008 |
| 20080257609 | Pneumatically Reversible Ram Boring Device - A pneumatically reversible ram boring device includes a percussion piston ( | 10-23-2008 |
| 20090003935 | System and Method for Tightening String Sections to Form a String - The invention relates to a tensioning device in particular for tensioning pipe sections upon an abutment, including a traction element, an adapter, and a tensioning device for applying the tension force, and a sliding brake. | 01-01-2009 |
| 20090211812 | BORING HEAD METHOD AND BORING HEAD FOR A GROUND BORING DEVICE - The invention relates to a boring head for a ground-boring device displacing earth with a percussive action, comprising at least three boring head sections, of which the first section has a form optimized for the loosening and for guiding the device, the second section is optimized with regard to the radial displacement of the earth with low resistance to motion, and the third section has a fixed connection to the housing of the ground-boring device. Improved transmission of the advancing forces to the earth and consequently an improved advance of the ground-boring device can be achieved by at least two of the boring head sections being designed so as to be axially movable relative to one another in the longitudinal direction. | 08-27-2009 |
| 20090255701 | ROD ASSEMBLY DRIVER - A rod assembly driver which is alternately acting in two opposing directions includes two opposing grip jaws for a rod assembly, which grip jaws are hingedly connected to one another in the form of a parallelogram by pairs of plates. | 10-15-2009 |
| 20100150643 | ROD COUPLING HAVING A SACRIFICIAL ELEMENT - The invention relates to a coupling system for rod segments for use in horizontal earth boring, wherein the ends of the rod segments are interlinked via a separate sacrificial element which can be used as a predetermined breaking point or which allows the rod segments to be pivoted relative each other. | 06-17-2010 |
| 20100196089 | ROD COUPLING HAVING A PIN - The invention relates to a rod coupling for rod segments for use in horizontal earth boring, wherein the ends of the rod segments can be interconnected and are fixed by means of a cross pin. | 08-05-2010 |
| 20100252228 | Geothermal System - The invention relates to a geothermal system for exchanging heat with the water of a public supply line, wherein the heat exchanger is arranged within the supply line and is used in modular form as a pipe section. | 10-07-2010 |
| 20100282517 | BORING SYSTEM - The invention relates to a system for the overground operation of underground sewer tools, especially of expander and pulling heads comprising a rod assembly that is rigid when pushed and a supporting device absorbing shear or tractive forces. | 11-11-2010 |
