| Patent Number |
Title Of Patent |
Date Issued |
| 6644887 |
Device for connecting a towed pipe to a towing apparatus |
November 11, 2003 |
| A device for connecting a towed pipe to a towing apparatus, for example a percussion boring machine or a towing head, comprises an adapter sleeve adapted to the towing apparatus and a towed pipe of which the connecting end is, for example, provided with longitudinal slits and accordingly |
| 6510905 |
Earth boring apparatus |
January 28, 2003 |
| In the case of an earth boring apparatus, preferably a thrust boring apparatus, the head of which is actuated by a pneumatically operated reciprocating ram, a supply hose (5) provides the connection from a compressor as an example to the thrust boring apparatus which also serves to r |
| 6491476 |
Method and apparatus for the trenchless laying of pipework underground |
December 10, 2002 |
| Apparatus and method for the trenchless laying of pipework underground, having a total and a gauge for the continuous widening of a preferably wound preformed pipe on a linkage for use in pits of small dimensions, preferably inspection shafts of sewage systems. |
| 6406215 |
Positive connection between a pipe and a ring inserted into the pipe |
June 18, 2002 |
| A positive connection between a pipe and a ring inserted into the pipe, in particular between the housing of a ram boring device and a stop ring inserted into the housing, wherein the inside wall of the pipe has a convex groove consisting of a section of a surface of a sphere and the |
| 6371220 |
Pneumatically reversible ram drilling tool |
April 16, 2002 |
| In a ram drilling tool for producing bores in the ground and having a percussion piston which is moved to and fro in a casing, a control sleeve is guided such that it can be displaced on a control pipe projecting into a percussion-piston chamber and whose axial position determines the |
| 6352128 |
Steered-head ram drilling tool |
March 5, 2002 |
| In a ram drilling tool having a steering element, for example a steering head, which is mounted in the tool casing such that it can move, for example rotate, the tool casing is connected to a pressure-medium line such that it cannot rotate and to a sleeve pipe such that it can rotate; |
| 6340270 |
Apparatus and method for the longitudinal splitting of pipes laid underground |
January 22, 2002 |
| An apparatus for longitudinal splitting, in particular longitudinal slitting, of pipes laid underground and for the simultaneous trenchless pulling-in of a new pipeline comprises a carriage in the form of a frame, in which a cutting wheel for cutting open the pipe wall and a support |
| 6267187 |
Boring apparatus with coupling for rapid connection of drill string segments |
July 31, 2001 |
| In apparatus for producing and expanding earth boreholes and for destroying and replacing underground pipelines or for driving in pipes, a feed drive and a rotary drive having a plug-in coupling comprising a chuck and a locking portion at the end of a string is located in a frame. The st |
| 6244783 |
Widening apparatus |
June 12, 2001 |
| An apparatus for widening microtunnels and/or for the destruction and replacement of ground-laid pipework and for the laying of new pipework possesses a tool which displaces the earth and/or destroys and/or displaces pipework laid in the earth, having a housing which is provided with |
| 6238141 |
Apparatus for static underground drilling |
May 29, 2001 |
| In an apparatus for drilling in earth, a push-pull linkage, especially a ladder-type linkage consisting of individual sections connected together in each case by a plug-in coupling, is connected to a push-pull drive, and a stationary locking pawl and a thrust pawl which is moveable in th |
| 6199643 |
Method and apparatus for directional boring |
March 13, 2001 |
| In directional boring using a boring apparatus having a driven string and a drill head with an excavating tool moving in an orbit about the longitudinal axis of the string, the tool moves with substantially constant angular velocity when boring straight ahead, but when boring along a |
| 5980157 |
Ground-boring machine |
November 9, 1999 |
| The invention pertains to a machine for producing or widening ground bores and/or for shattering old pipelines and laying new pipelines, consisting of a push-pull unit and a rod assembly that is connected to and driven by the push-pull unit and extends through the ground bore or the pipe |
| 5975221 |
Machine for horizontal percussion boring |
November 2, 1999 |
| In a machine for horizontal or inclined percussion boring in the ground having a percussion boring string which has an oblique-face boring head at one end and an impact mechanism at the other end, the impact mechanism is mounted beside the rotary drive in order to reduce the length of th |
| 5960892 |
Automatically driven pile driver drilling device |
October 5, 1999 |
| The invention relates to an automatically driven pile-driver drilling device for drilling into the earth with a percussion piston moving axially inside a casing, driven by a pressure medium and changeable from a forward stroke to a backstroke, with a working space having radial control |
| 5954209 |
Boring rod magazine |
September 21, 1999 |
| A boring-rod magazine which can be moved into the drilling axis of a boring machine. The boring-rod magazine may contain a plurality of boring rods, and holds a boring rod to position it in the drilling axis, and then releases the boring rod when boring-rod magazine is removed. The b |
| 5954145 |
Reversible percussion piston drill apparatus |
September 21, 1999 |
| In a percussion drill apparatus for soil drilling with a percussion piston which is moving to and fro within a housing, a control sleeve is mounted on a control tube which protrudes into the percussion piston chamber, the axial position of which determines the direction of movement of th |
| 5937956 |
Ram boring machine |
August 17, 1999 |
| A ram-boring machine with forward and reverse motion control which comprises a percussion piston that can be axially displaced in a tubular housing, a control tube that is arranged in the housing and controls the forward and reverse motion of the percussion piston by passing over radial |
| 5937954 |
Method for directional drilling |
August 17, 1999 |
| In a method for directional drilling with the aid of a drilling device having a drill pipe and a mining tool which moves on an orbit, the tool moves at an essentially constant angular velocity during straight drilling and the angular velocity is periodically changed during curved drillin |
| 5924500 |
Steerable boring machine |
July 20, 1999 |
| With a boring machine having a multistrand rod assembly (3) for producing boreholes in the ground, comprising a rotatable inner rod (29), an outer rod (19), at least one steering and digging tool (5; 33, 35, 36) driven by the inner rod and having an axis of rotation (22) inclined at an a |
| 5895176 |
Device for connecting a pipeline conduit to a ground-boring machine |
April 20, 1999 |
| A device for connecting a pipeline conduit to a ground-boring machine or for replacing old pipes and inserting the end of an individual pipe into a sleeve joint of the preceding pipeline conduit, comprising a tensioning frame that can be attached to the end of the pipeline conduit or the |
| 5876152 |
Ramming drill for destructive replacement of buried pipelines |
March 2, 1999 |
| Ramming drill for destructive replacement of buried pipelines with a conical tip, a crushing head set onto the conical tip with radial cutters and a traction cable acting on the equipment tip. |
| 5833015 |
Method and apparatus for sinking pipes or cables into a pilot borehole |
November 10, 1998 |
| Method and apparatus for sinking pipes (8) or cables into a pilot borehole (4) by use of a drill string (3) including an expansion drill bit driven to rotate and pull is disclosed. The expansion drill bit is supplied with a wash fluid and is coupled with the pipe or cable (10) to be sunk |
| 5795991 |
Arrangement of an impact-sensitive device in a housing |
August 18, 1998 |
| Arrangement of an impact-sensitive device in a housing, particularly a transmitter for locating a drilling device located in a borehole in the ground, wherein the device is maintained within same by means of at least one impact-damping buffer at least in the main direction of impact and |
