| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 07/27/2000 | WO2000043637A1 Rock boring device |
| 07/20/2000 | DE19900906A1 Rotating chisel for masonry and rock has an eccentric drive with the impact drive for the tools varied to match the hardness of the material being worked |
| 07/18/2000 | CA2205596C Apparatus and method for cutting arched opening |
| 07/11/2000 | US6086159 Softwall mining method and device |
| 06/22/2000 | WO2000036230A1 Rotary drum cutting head |
| 06/15/2000 | DE19941799A1 Continuous surface miner for mineral raw materials in sedimentary layers has three-track running gear connected by substructure frame with steering actuator, and superstructure with drive, cutter, and loading conveyor |
| 06/13/2000 | CA2112813C Rotary cutter for extracting hard rock |
| 05/25/2000 | DE19941800A1 Drive and propulsion mechanism for cutter roll in opencast mining machine, has multi-section roll with drive units at both ends using internal roll flanges and external lateral supports |
| 05/17/2000 | CN2378536Y Submersible drum coal-winning machine |
| 05/11/2000 | DE19941802A1 Pick-up chute for open cast mining milling roller has shield board enclosing milling roller and with lower stripping edge and opening forming guide tunnel for transferring material to discharge belt |
| 03/29/2000 | CN2371340Y Pneumatic down-hole slitting machine |
| 03/23/2000 | WO2000015947A1 Mining machine and mining method |
| 03/08/2000 | EP0843774A4 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 03/02/2000 | DE19838195A1 Roller boring machine for drilling and clearing away stone and minerals has small boring tools radially mounted on rotatably driven sleeve |
| 02/23/2000 | EP0980464A1 Softwall mining method and device |
| 01/18/2000 | US6014826 Chain for trencher apparatus |
| 12/07/1999 | US5997100 Inertization system for highwall mining |
| 12/01/1999 | EP0960264A1 Hewing or cutting roller with variable cutting width |
| 10/12/1999 | US5964507 Apparatus for mining a mineral seam |
| 09/15/1999 | CN2338488Y Automatic coal cutting and forming machine |
| 09/10/1999 | WO1999045237A1 An arrangement for drilling slots |
| 08/31/1999 | CA2075104C Process and device for the exploitation of subterranean deposit by means of a tunnel borer |
| 08/19/1999 | WO1999041463A1 Method for working through ground and rock layers with dredgers or excavators and apparatus operating according to this method |
| 07/13/1999 | US5921632 Method and apparatus for extending the cutter drum of a boring machine |
| 07/07/1999 | CN2327785Y Shock tooth |
| 04/21/1999 | CN2315297Y Coal cutter |
| 04/20/1999 | US5895097 Continuously operating mining machine for simultaneous excavation and conveying of coal |
| 04/07/1999 | CN2313041Y Slot-cutting device for blasthole |
| 03/09/1999 | US5879057 Horizontal remote mining system, and method |
| 02/24/1999 | EP0898051A1 Combination of a conventional slotting tool with eccentric driven milling tools |
| 02/18/1999 | CA2245148A1 Combination of conventional or superimposed percussive slot-cutting tools |
| 01/26/1999 | US5863101 Auger mining machine and mine launch device |
| 12/24/1998 | DE19724924A1 Part cut mining scratching machine cutting roller |
| 12/15/1998 | CA2146940C Underground hydraulic mining method and apparatus |
| 12/02/1998 | CN2299153Y Automatic wedge coal planing machine |
| 11/17/1998 | US5836658 Method and apparatus for boring and shearing of rocks |
| 11/12/1998 | WO1998050682A1 Softwall mining method and device |
| 11/11/1998 | CN1198794A Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 10/14/1998 | CN2294333Y Cutting edge for coal prodn. machine |
| 10/13/1998 | US5820223 Inertization system for highwall mining |
| 09/23/1998 | CN2292163Y Umbrella structure tooth-cutting alloy cutter |
| 09/22/1998 | US5810449 Cutting drum for an open cast apparatus performing its winning action in both directions of travel |
| 09/16/1998 | CN1039845C Vibration cutting machine |
| 09/08/1998 | US5803550 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 08/19/1998 | CN1039549C Apparatus for cutting and excavating solids |
| 08/13/1998 | WO1998035104A1 Electrostatic water spray dust suppression system for mobile dust sources |
| 08/06/1998 | WO1998034010A1 Hewing or cutting roller with variable cutting width |
| 07/08/1998 | CN1186896A High hardness high toughness pick and preparing technology |
| 06/16/1998 | US5765924 High pressure water jet channeling horizontally into a solid mountain of granite |
| 05/27/1998 | EP0843774A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 05/26/1998 | CA2146576C Process for inerting a coal mining site |
| 02/25/1998 | EP0824395A1 Road milling drum assembly and method of milling |
| 02/25/1998 | CN2275161Y Coal shovel |
| 02/04/1998 | CN2273771Y Non-uniform blade cutting drun of coal mining machine |
| 01/29/1998 | WO1998003769A1 A disc cutter |
| 01/29/1998 | CA2261003A1 A disc cutter |
| 01/21/1998 | EP0656988A4 Apparatus for cutting and excavating solids. |
| 01/07/1998 | EP0815337A1 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts |
| 01/07/1998 | CN2272049Y Quarrying machine |
| 01/02/1998 | DE19625039A1 Linked cutting device |
| 12/31/1997 | CN2271611Y Development machine cutting mechanism of chain saw type |
| 12/09/1997 | US5695016 Auger telescoping hoist assembly and holding fork mechanism |
| 12/04/1997 | DE19622241A1 Method for breaking up hard materials by jets of fluid in tunnelling or mining by galleries |
| 12/02/1997 | US5692807 Highwall mining apparatus |
| 11/27/1997 | DE19620536A1 Protective hood for milling cutter |
| 11/27/1997 | DE19620499A1 Tunnelling machine with swinging cutter head |
| 11/25/1997 | US5690184 Rock drilling apparatus |
| 11/11/1997 | US5685615 Eccentrically driven percussive tools for treating materials |
| 11/11/1997 | US5685382 Quadrapod auger support |
| 11/06/1997 | DE19616931A1 Continuous working extraction machine |
| 11/05/1997 | CN1163980A Impact coal cutting machine |
| 10/01/1997 | EP0798446A2 Cutting chain for a cutting machine for cutting hard stone material such as marble or the like |
| 09/02/1997 | US5662387 Cutter head and method for mining hard rock |
| 08/28/1997 | WO1997022424A3 Device and process for machining away hard surfaces, in particular road surfaces |
| 07/17/1997 | CA2167357A1 Eccentrically driven percussive tools for treating materials |
| 07/15/1997 | US5647641 Bar for a road milling drum |
| 07/15/1997 | US5647640 Method of operating a mining machine for seam mining |
| 07/10/1997 | DE19600450A1 Device for continuous eroding of solid material by fluid jets |
| 07/09/1997 | EP0697049B1 Detachable link for an endless cutting or kerfing chain |
| 06/26/1997 | WO1997022424A2 Device and process for machining away hard surfaces, in particular road surfaces |
| 06/26/1997 | DE19547698A1 Vorrichtung und Verfahren zum Abfräsen von harten Oberflächen, insbesondere von Straßenbelägen Device and method for milling of hard surfaces, in particular of road surfacings |
| 06/24/1997 | US5641207 Boring machine |
| 06/19/1997 | DE19547170A1 Milling roller with extraction equipment for mining work |
| 06/18/1997 | CN1152069A Chain saw type cutter for coal shovel and tunneller |
| 06/17/1997 | US5639180 Milled roadway surface |
| 06/17/1997 | CA2192523A1 Cutting drum for an open cast winning apparatus performing its winning action in both directions of travel |
| 05/21/1997 | CN1150213A Highwall mining apparatus |
| 05/09/1997 | WO1997016606A1 Methods and apparatus for excavating a solid material |
| 05/07/1997 | EP0771911A1 An active element for the support of at least one milling tool, suited to be applied on milling drums of operating machines for the removal of soils |
| 05/06/1997 | US5626399 Apparatus for cutting and excavating solids |
| 04/29/1997 | CA2064205C Method and apparatus for cutting erosive materials using high pressure water means |
| 03/26/1997 | CN2250423Y Light chain coalcutter |
| 03/11/1997 | US5609397 Highwall mining system with driven conveyor units |
| 02/27/1997 | WO1997007317A1 Mining machine |
| 02/20/1997 | WO1997006348A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | CA2235676A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/12/1997 | EP0482019B1 Method and apparatus for cutting erosive materials using high pressure water means |
| 12/10/1996 | US5582465 Method and apparatus for mining inclined mineral deposits |
| 11/27/1996 | EP0663983B1 Auger mining machine |
| 11/27/1996 | CN2241226Y Stone quarrying machine |