| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 02/18/2010 | WO2010019361A2 Bit holder block with non-rotating wear sleeve |
| 02/18/2010 | US20100038955 Bit holder block with non-rotating wear sleeve |
| 02/17/2010 | CN201407040Y Automatic coal shovel |
| 02/11/2010 | US20100031609 Transportation of sulphur from solid sulphur deposits, in blocks of large dimensions |
| 02/10/2010 | CN201401166Y Drill loader |
| 02/10/2010 | CN201401165Y Cutting part of heading machine |
| 02/10/2010 | CN101644155A Hydraulic drill loader |
| 02/09/2010 | US7658024 Universal digging tooth attachment apparatus |
| 02/04/2010 | WO2009151949A4 Cutting tool with nozzle for spraying water on a cutter bit |
| 02/03/2010 | CN201396155Y Shearer drum with spalling rib picks |
| 02/03/2010 | CN101638984A Shaped chain |
| 02/03/2010 | CN101638983A Coal mining machine with double-power rollers |
| 01/28/2010 | US20100018776 Cutting bit for mining and excavating tools |
| 01/27/2010 | CN101634226A Coal digging machine |
| 01/27/2010 | CN101634225A Excavation type tunnel excavator |
| 01/27/2010 | CN101634224A Heading machine provided with cantilever type front canopy supporting protection device |
| 01/20/2010 | EP2145689A1 Method and apparatus for prepping surfaces with a high-frequency forced pulsed waterjet |
| 01/20/2010 | CN201386562Y Development machine |
| 01/20/2010 | CN201386561Y Hobbing cutter with axial thrust structure |
| 01/20/2010 | CN201386560Y Tunneling machine capable of realizing high-precision manipulation |
| 01/13/2010 | CN201381856Y Coal winning machine rotary drum with internal helical blades |
| 01/06/2010 | CN201376322Y Motorized two-wheel different-direction slitting saw |
| 01/06/2010 | CN100577984C Down-hole coal excavation apparatus |
| 12/31/2009 | US20090322142 Rock sampling apparatus |
| 12/31/2009 | US20090321140 Reamer and methods for directional drilling |
| 12/30/2009 | WO2009155776A1 A dilling, loading, transporting and anchoring integration machine for laneway in coal mine |
| 12/30/2009 | EP2138674A1 A track-mounted elevator top and side bolts and cables drilling machine |
| 12/30/2009 | CN201372796Y Boom-type road-header arm body |
| 12/23/2009 | CN100572749C Lapping device between cantilevered development machine and post-matching leather belt reshipment machine |
| 12/17/2009 | WO2009151949A1 Cutting tool with nozzle for spraying water on a cutter bit |
| 12/17/2009 | WO2009132025A3 Trencher attachment |
| 12/16/2009 | CN201363143Y Cutting telescopic arm of heading machine with pipeline supporting chain |
| 12/16/2009 | CN201363087Y Gassy outburst mine coal-road tunneling outburst-proof drill loader with dual drilling machine and dual pump station |
| 12/15/2009 | US7631942 Device for milling rock and other materials and method for milling rock or the like using said device |
| 12/10/2009 | US20090302668 Holder for holding a tooth on a body of a cutting blade or grinding drum for cutting or grinding rock or hard earth formations |
| 12/09/2009 | CN201359494Y Height measurement instrument of continuous coal winning machine |
| 12/09/2009 | CN201358784Y Mine arm-hammer type tunnel digging loader |
| 12/09/2009 | CN101598018A Alpine bolter miner back affiliating travel type breaking and transhipping continuous transporting device |
| 12/09/2009 | CN100567703C Comprehensive coal-mining process by using long wall mining method |
| 12/08/2009 | US7628233 Carbide bolster |
| 12/02/2009 | CN100564798C Roadheader |
| 11/25/2009 | CN101586461A Method for recycling single-drum shearer short-wall comprehensive mechanical coal pillar |
| 11/11/2009 | CN201344032Y Complete device integrating the tunneling, protection and anchoring |
| 11/11/2009 | CN101575974A Gathering arm style mechanical mucker |
| 11/11/2009 | CN101575973A Mining machine with driven disc cutters |
| 11/11/2009 | CN101575972A Crossed chain-cutting narrow crawler double-push liquid wedge and support type stone head development machine |
| 11/11/2009 | CN100559015C Integrated tunnelling and anchoring machine |
| 11/11/2009 | CN100559013C Tunneling, anchoring and drilling composite machine |
| 11/05/2009 | US20090273224 Layered polycrystalline diamond |
| 10/29/2009 | WO2009132025A2 Trencher attachment |
| 10/29/2009 | WO2009129688A1 Rock drivage and supporting construction drilling machine |
| 10/28/2009 | CN101566070A Support of multifunctional scraper conveyor in mine |
| 10/22/2009 | US20090261646 Indexable Cutting Tool System |
| 10/15/2009 | US20090256413 Cutting bit useful for impingement of earth strata |
| 10/14/2009 | EP2108783A2 Cutting head base body and cutting head for a heading or a shearing machine and method for their production |
| 10/14/2009 | CN201326417Y Airborne electric traction coal mining machine for ultra-thin coal seams |
| 10/14/2009 | CN101555789A Shearer drum with lateral wall-caving cutting pick |
| 10/08/2009 | WO2009122001A1 Drilling unit, method for slot drilling and slotting device |
| 09/30/2009 | CN201318174Y Coal cutter |
| 09/23/2009 | CN201314233Y All-in-one machine of tunneling, anchoring, boring and shipping |
| 09/23/2009 | CN101539019A Roller of coal mining machine with internal helical blades |
| 09/23/2009 | CN100543266C Coal mine tunnel digging machine |
| 09/17/2009 | US20090232598 Adjustable planer system |
| 09/17/2009 | US20090230755 Method and Device for Mining Subsurface Deposits |
| 09/16/2009 | CN201310357Y Split type rocker arm of coal-winning machine |
| 09/09/2009 | CN201306169Y High pressure water hydraulic balancing and sealing system of development machine |
| 09/09/2009 | CN101526000A Coal mining machine |
| 09/09/2009 | CN100538008C Digging-drilling integrated digging-drilling machine |
| 09/09/2009 | CN100538007C Cutting head structure of tunneling machine |
| 09/09/2009 | CN100538006C Hard rock tunneling machine |
| 09/02/2009 | CN201301711Y Novel mini-type tunneling machine for coal mine |
| 09/02/2009 | CN101523014A Thick pointed superhard material |
| 08/27/2009 | WO2009103306A1 Method for stabilizing the shield column in a longwall mining operation conducted along the seam slope |
| 08/27/2009 | WO2009103305A1 Method for controlling longwall mining operations by identifying boundary layers |
| 08/27/2009 | WO2009103303A1 Method for controlling longwall mining operations |
| 08/26/2009 | CN101516772A Transportation of sulphur from solid sulphur deposits, in blocks of large dimensions |
| 08/26/2009 | CN100532784C Driving head for entry-driving machine |
| 08/20/2009 | WO2009100469A1 Heading work machine having drill head made of disk tools |
| 08/20/2009 | CA2714975A1 Heading machine having cutting unit made of disc tools |
| 08/19/2009 | CN201292849Y Medium groove apparatus of eye cutting digging rapid adding scraper machine |
| 08/19/2009 | CN101509373A Semiclosed drum of coal cutter with coal ploughing plate |
| 08/12/2009 | CN201288710Y Hydraulic oil tank for cantilever type digging machine |
| 08/12/2009 | CN201288565Y Blade for cantilevered type digging machine |
| 08/12/2009 | CN201288564Y Traction hook for cantilever type digging machine |
| 08/12/2009 | CN201288563Y Conveyer apparatus for cantilever type digging machine |
| 08/12/2009 | CN201288558Y Connecting apparatus for digging machine |
| 08/12/2009 | CN201288557Y Digging head for cantilevered type digging machine |
| 08/12/2009 | CN201288556Y Cantilevered type digging machine with bi-directional digging head |
| 08/12/2009 | CN201288555Y External arm for digging machine telescopic cantilever |
| 08/12/2009 | CN201288554Y Digging head combined disk for cantilevered type digging machine |
| 08/12/2009 | CN201288553Y Revolving seat for cantilevered type digging machine |
| 08/12/2009 | CN201288552Y Cantilever for cantilevered type digging machine |
| 08/12/2009 | CN201288551Y Rear supporting arm for cantilevered type digging machine |
| 08/12/2009 | CN100526603C Coal cutting machine |
| 08/05/2009 | CN201284650Y Creeping baseboard chain hauled shearer |
| 07/29/2009 | EP2082117A2 Edge cutter assembly for use with a rotatable drum |
| 07/29/2009 | CN101493009A Middle groove of coal cutter and method for manufacturing same |
| 07/29/2009 | CN100519988C Mining machine and mining method |
| 07/28/2009 | CA2484394C Rock cutting machine |
| 07/23/2009 | US20090184564 Pcd percussion drill bit |