| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 09/27/2006 | CN1277041C Mining and tunneling device |
| 09/26/2006 | US7112005 Scraper apparatus and method |
| 09/21/2006 | US20060208556 Cutting tool |
| 09/14/2006 | US20060202547 Auger flight support system |
| 09/07/2006 | US20060198703 Pavement Trimming Tool |
| 09/07/2006 | US20060198702 Pavement Degradation Tools in a Ganged Configuration |
| 09/07/2006 | US20060196698 Apparatus, system and method for directional degradation of a paved surface |
| 09/06/2006 | EP1373676B1 An apparatus for retrieving metal debris from a well bore |
| 09/06/2006 | CN1828014A Hydraulic chain grooving machine |
| 08/24/2006 | US20060186724 Tool holder block and sleeve retained therein by interference fit |
| 08/22/2006 | US7093906 Floor scraping machine with floating blade |
| 08/03/2006 | WO2006079536A1 Device for milling rock and other materials and method or milling rock or the like using said device |
| 08/02/2006 | EP1685309A1 Boring rig |
| 08/02/2006 | CN1811128A Automatic integrated cutting and transporting apparatus for mine |
| 08/01/2006 | CA2289269C Softwall mining method and device |
| 07/26/2006 | CN1266348C Cutting device for cutting trenches in the ground |
| 07/19/2006 | CN2797781Y Device for automatically lubricating for gear box of coal mining machine |
| 07/19/2006 | CN2797780Y Gear reducer of coal mining machine utilizing sensor controlling |
| 07/19/2006 | CN2797767Y Shock absorbing system for coal mining machine |
| 07/19/2006 | CN2797632Y Telescopic cutting pick |
| 07/19/2006 | CN2797631Y Taper spiral tunnelling unit |
| 07/19/2006 | CN2797630Y Tubular telescopic arm structure |
| 07/12/2006 | CN2795444Y Small coal tunnelling rock drill |
| 07/12/2006 | CN2795443Y Tunnelling device of tunnelling machine |
| 07/11/2006 | US7073869 Shield tunneling machine |
| 07/11/2006 | US7073868 Optimized kinetic energy machine for excavating underwater rock |
| 07/05/2006 | CN2793327Y Manless coal cutter under well |
| 06/28/2006 | CN2791258Y Wireless remote control device for hydraulic traction coal producer |
| 06/27/2006 | US7066555 Reinforced concrete milling/cutting mandrel |
| 06/15/2006 | US20060125308 Wear ring and extraction device for a rotatable tool |
| 06/15/2006 | US20060125307 Retainer sleeve and wear ring for a rotatable tool |
| 06/15/2006 | US20060125306 Extraction device and wear ring for a rotatable tool |
| 06/14/2006 | EP1604097A4 A mining lacing pattern |
| 06/14/2006 | CN2787831Y Coal sawing machine with chain cable for coal mining face |
| 06/14/2006 | CN2787830Y Drum type trackless coal wall grooving machine |
| 06/08/2006 | US20060119165 Chisel holder |
| 06/06/2006 | CA2495143C Thermal rock fragmentation application in narrow vein extraction |
| 05/03/2006 | EP1497534A4 Rock cutting machine |
| 05/02/2006 | US7036890 Core breaker for an earth strata cutting assembly |
| 04/27/2006 | US20060087169 Coal plow cutter |
| 04/26/2006 | EP1649971A1 Device and method for high-pressure water jetting surface cutting |
| 04/13/2006 | US20060076821 Electric milling machine |
| 04/12/2006 | EP1497536A4 Oscillating disc cutter with speed controlling bearings |
| 04/12/2006 | CN2771480Y Soft ore body disc slitting machine |
| 04/12/2006 | CN2771479Y Coal-mining drilling machine |
| 04/06/2006 | US20060071538 Non-rotatable wear ring and retainer sleeve for a rotatable tool |
| 04/05/2006 | CN2769515Y Tunneller cantilever device |
| 04/05/2006 | CN2769514Y Drilling machine cutting unit speed changing device |
| 03/29/2006 | CN2767662Y Quarrying machine |
| 03/29/2006 | CN2767661Y Axial regulating device for saw bit of quarrying machine |
| 03/29/2006 | CN1752412A Detachable jaw crusher for drifting machine |
| 03/23/2006 | WO2006029480A1 A method of producing or repairing a cutting blade |
| 03/23/2006 | US20060061206 Tool, cutter and button disk |
| 03/23/2006 | US20060061205 Device for produing a gas-liquid mixture in the vicinity of cutting tools |
| 03/22/2006 | CN1751170A A mining lacing pattern |
| 03/16/2006 | US20060055229 Cutting tool with nozzle for spraying water on cutter bit |
| 03/08/2006 | CN2763512Y Saw face drawing expansion type stone exploitation device |
| 03/01/2006 | CN2761843Y Mini type coal cutting machine |
| 02/23/2006 | US20060038438 Method and apparatus for remote self-propelled conveying in mineral deposits |
| 02/22/2006 | EP1627113A1 Cylindrical cutting element supported on a chain |
| 02/16/2006 | DE202005019935U1 Link chain for mining applications has chain lock with essentially or exactly the same external dimensions as the remaining chain elements |
| 02/15/2006 | CN2758477Y Saw cutting type coal cutter |
| 02/09/2006 | DE19649108B4 Kurzfrontmaschine für den Untertagebergbau mit einer Führung für ein Bohrgerät zum Herstellen von Bohrlöchern für die Firstverankerung Short front machine for underground mining with a guide for a drill for making holes for anchoring First |
| 02/07/2006 | US6994404 Rotatable tool assembly |
| 02/07/2006 | US6994403 Apparatus and method for removing floor tile |
| 02/02/2006 | US20060022511 Chisel |
| 02/02/2006 | US20060022510 Tool extraction system for rotary cutter device |
| 02/02/2006 | US20060022509 Motorized floor stripper with adjustable motion |
| 02/02/2006 | DE10132608B4 Aktivierungsgerät und Aktivierungssystem zur Bereitstellung eines Schlagimpulses für Schneidköpfe hydraulischer Trägergeräte Activation device and activation system for providing a shock pulse for cutting heads hydraulic carrier devices |
| 01/26/2006 | US20060017313 Hydraulically actuated impact apparatus |
| 01/24/2006 | US6988776 Floor scraping machine with floating blade |
| 01/19/2006 | US20060012238 Power take off |
| 01/04/2006 | CN1717533A Thermal rock fragmentation application in narrow vein extraction |
| 12/20/2005 | CA2189132C A highwall mining system with mining and removal of coal (or ore) |
| 12/14/2005 | EP1604097A1 A mining lacing pattern |
| 12/14/2005 | CN1707066A Automatic whole-section external rotor low-speed motor cutting rotation drum anchor driving machine |
| 12/08/2005 | WO2005116402A1 Apparatus and method for moving a mine conveyor segment |
| 12/08/2005 | US20050269132 Laser spectroscopy/chromatography drill bit and methods |
| 12/07/2005 | CN2744833Y High pressure water gun for mine |
| 12/07/2005 | CN2744832Y Swinging up and down type high pressure water gun |
| 11/16/2005 | CN1227445C Directional drilling machine with continuous propelling water jet flow |
| 11/10/2005 | US20050248209 Hewing or cutting roll |
| 11/09/2005 | CN1693661A Small size coal rock driling machine |
| 11/09/2005 | CN1693660A Driving device of tunnel development machine |
| 11/08/2005 | US6962395 Non-rotatable protective member, cutting tool using the protective member, and cutting tool assembly using the protective member |
| 10/06/2005 | WO2005091899A2 Surface real-time processing of downhole data |
| 10/06/2005 | CA2558162A1 Surface real-time processing of downhole data |
| 10/05/2005 | CN2731105Y Three screen threading digging cutter |
| 10/05/2005 | CN2731101Y Split main frame connection mechanism for coal cutter |
| 10/05/2005 | CN2731100Y Small size coal digging machine |
| 09/29/2005 | US20050212345 Rotary cutting bit having spark suppression sleeve |
| 09/28/2005 | CN1672834A Casting method of pick with composite material |
| 09/27/2005 | US6948779 Cutting roller for a continuously operating surface miner |
| 09/22/2005 | US20050206216 Drum turning mechanism for continuous miners and longwall shearers |
| 09/21/2005 | CN2727398Y Shearer drum with helical blades and axially inclined picks thereon |
| 09/21/2005 | CN2727397Y Chain haulage drum shearer with multi transversely arranged motors |
| 09/15/2005 | US20050200192 Rock cutting machine |
| 09/08/2005 | US20050194182 Surface real-time processing of downhole data |
| 08/30/2005 | US6935443 Mini disk bit |
| 08/24/2005 | EP1157190A4 Cutting device |