| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 03/08/2012 | US20120056465 Cutting tool for a mining machine |
| 03/07/2012 | CN202157806U 多功能矿用钻机 Multifunction mining rig |
| 03/07/2012 | CN202157805U 一种用于切割矿体的开槽机 For cutting ore slot machines |
| 03/07/2012 | CN102367732A Wear resistant block |
| 02/29/2012 | CN102364053A Heading-anchoring machine |
| 02/29/2012 | CN102364048A Comprehensive mechanized rock roadway tunneling machine |
| 02/29/2012 | CN101915095B Drill loader |
| 02/23/2012 | US20120043800 Method and apparatus for creating a planar cavern |
| 02/22/2012 | CN102359373A Drum shearer cutting part |
| 02/16/2012 | WO2012019474A1 Method, system, and probe for recognizing coal-rock interface |
| 02/16/2012 | US20120038205 Extraction system for mineral extraction and retaining device for a sensor system therefor |
| 02/16/2012 | US20120038203 Pick Assembly with Integrated Piston |
| 02/09/2012 | DE112010000829T5 Kaltgeformtes Schneidwerkzeug A cold formed cutting tool |
| 02/08/2012 | CN202140086U Rocker coal mining machine with double cutting motors |
| 02/08/2012 | CN102345459A Cutting mechanism for heading machine |
| 02/08/2012 | CN102345458A Drilling-milling-beam installation integrative machine for coal road |
| 02/08/2012 | CN102345457A Large-gradient continuous coal mining machine |
| 02/08/2012 | CN101899974B 一种掘进机及其浮动密封装置 One kind of boring machines and floating seal |
| 02/01/2012 | CN202132039U 矿山巷道用挖斗装载机的挖掘装置 Mine workings with the digging and digging bucket loaders |
| 02/01/2012 | CN102337888A Large-gradient development machine |
| 02/01/2012 | CN102337887A Overpass chain cutting tower type lump extraction support protection conveying type combined lump coal machine |
| 01/26/2012 | WO2012012160A2 Cutter assembly configured to allow tool rotation |
| 01/26/2012 | WO2011130688A3 Advancing longwall system for surface mining |
| 01/26/2012 | WO2011130683A3 Continuous surface mining system |
| 01/26/2012 | US20120019045 Water spray system for continuous miner and method of use |
| 01/19/2012 | DE102010060453A1 Tool for machining of materials, particularly for surface processing, has supporting body movable rotatably by drive around rotational axis and multiple drill bits arranged at supporting body |
| 01/18/2012 | CN202117674U Continuous miner of open coal mine with roller laterally arranged |
| 01/18/2012 | CN102322260A Waterproof and explosion-proof digital control type multifunctional unmanned mining machine |
| 01/12/2012 | US20120007412 Continuous-extraction mining system |
| 01/11/2012 | CN202108508U Drilling-loading machine and drilling device thereof |
| 01/11/2012 | CN202108507U Cutting-type coal cutting equipment |
| 01/11/2012 | CN202108506U Side arm-type cutting device for low seam mining machine |
| 01/11/2012 | CN101871362B Laneway material transportation vehicle for mines |
| 01/11/2012 | CN101787889B Comprehensive mechanized coal mining method through cantilever support |
| 01/05/2012 | US20120001475 Cutter assembly configured to allow tool rotation |
| 01/04/2012 | CN202100257U Screw drum of coal mining machine |
| 01/04/2012 | CN202100256U Rotation stopping shaft of tunneling machine |
| 01/04/2012 | CN102305069A Technology and equipment for separating coal and gangue and refilling gangue |
| 01/04/2012 | CN102305068A Development machine |
| 01/04/2012 | CN102305067A Development machine mechanism |
| 01/04/2012 | CN102305066A Coal mining machine and cutting roller device |
| 12/28/2011 | CN202090920U 一种掘进机铲板及掘进机 One kind of boring machine shovel board and boring machines |
| 12/28/2011 | CN202090916U 动力变速掘进机 Power shift roadheader |
| 12/28/2011 | CN202090915U Double-clutch device for cutting part of rotary drum type coal mining machine |
| 12/22/2011 | US20110309669 Cooling a ranging arm gear case on a longwall shearer |
| 12/21/2011 | CN102292519A 冷成形的切削刀具 Cold forming cutting tool |
| 12/21/2011 | CN102287185A 一种大功率重型薄煤层采煤机 One kind of high-power heavy thin seam Shearer |
| 12/21/2011 | CN101864955B 一种转载机凹槽及转载机 One kind of groove loader and loader |
| 12/20/2011 | US8079648 Cold-formed cutting tool |
| 12/20/2011 | US8079647 Vibratory milling machine having linear reciprocating motion |
| 12/14/2011 | CN202073563U 用于薄煤层采煤机的截煤机构 Cut for thin seam coal shearer agency |
| 12/14/2011 | CN202073562U 采煤机截割装置 Shearer cutting device |
| 12/14/2011 | CN102278111A 一种掘进机星轮驱动装置和掘进机 One kind of boring machine star wheel drive and boring machines |
| 12/14/2011 | CN102278110A 一种可移动升降平台两臂顶帮锚杆锚索施工钻车 Removable, arms lifting platform to help anchor the top anchor drill rig construction |
| 12/14/2011 | CN101858213B 煤巷双平台四臂钻装运锚一体化机 Coal Lane dual-platform integrated four-arm drill ship anchored machine |
| 12/07/2011 | CN202064951U 掘探一体机 Digging machine probe |
| 12/07/2011 | CN202064950U 掘挖一体机截割头 Dig digging machine cutting head |
| 12/07/2011 | CN202064949U Tapered rock-breaking spiral drum of coal mining machine |
| 12/07/2011 | CN202064948U Ultra-low surface full hydraulic drilling type coal mining machine |
| 12/07/2011 | CN102268991A 动力变速掘进机 Power shift roadheader |
| 12/07/2011 | CN102268990A 机械化矿井采煤机破碎装置 Shearer mechanized mine crusher |
| 12/01/2011 | US20110290559 Surface real-time processing of downhole data |
| 11/30/2011 | CN202055822U 一种切割头式短壁采煤机 A cutting-head short wall Shearer |
| 11/30/2011 | CN202055821U 一种可移动升降平台两臂顶帮锚杆锚索施工钻车 Removable, arms lifting platform to help anchor the top anchor drill rig construction |
| 11/30/2011 | CN102261245A 一种带辅助收料装置的铲板 A tape rewinding device shovel auxiliary board |
| 11/23/2011 | CN102251771A Tunneling and drilling integrated machine |
| 11/16/2011 | CN202039848U Movable belt conveyor |
| 11/16/2011 | CN202039847U Hydraulic impulse type cutting device |
| 11/16/2011 | CN202039846U Continuous miner with function of cutting arbitrary sections |
| 11/16/2011 | CN202039845U Mechanical-transmission pulse type cutting device |
| 11/09/2011 | CN202031759U Drum shearer and water treatment system thereof |
| 11/09/2011 | CN202031591U Fully mechanized coal face complete equipment and coal mining machine thereof |
| 11/09/2011 | CN202031590U Coal-scattering preventing device of coal mining machine cutting part |
| 11/09/2011 | CN202031589U Cantilever arm device of tunneller |
| 11/09/2011 | CN202031588U Coal mining machine for long-wall working face |
| 11/09/2011 | CN202031587U Rocker arm of double cutting motors of coal mining machine |
| 11/09/2011 | CN102235167A Excavating loader for coal mine |
| 11/02/2011 | CN202023559U Comprehensive dig-anchor machine |
| 11/02/2011 | CN102230378A Digging and drilling integrated machine |
| 11/01/2011 | US8047741 Road-milling machine or machine for working deposits |
| 10/26/2011 | CN202017487U Harrow teeth made of novel wear-resistant composite material for scraper pan rock loader |
| 10/26/2011 | CN102226395A Tunneling and drilling all-in-one machine |
| 10/26/2011 | CN102226394A Digging and exploring integrated machine |
| 10/19/2011 | CN202012364U Onboard advance support device for cantilever excavator |
| 10/19/2011 | CN202012349U Block coal cutting machine |
| 10/19/2011 | CN202012348U Cutting device of roadheader |
| 10/19/2011 | CN202012347U Coal mining machine with automatic centralized lubricating function |
| 10/19/2011 | CN202012346U Coal mining device and roller electric speed control system thereof |
| 10/13/2011 | US20110247246 Attachment cutting system having cutting heads and a cutter chain |
| 10/13/2011 | DE102010014644A1 Selbstfahrende Arbeitsmaschine mit elektrischem Antriebssystem sowie Verfahren zum Betreiben einer solchen Self-propelled machine with electric drive system and method for operating such |
| 10/12/2011 | CN102216564A Method and device for working rock |
| 10/12/2011 | CN102213094A Construction system and construction method for mine rock drivage |
| 10/12/2011 | CN102213093A Helical shearer roller |
| 10/12/2011 | CN102213092A Coal mining machine for coal wall mining |
| 10/06/2011 | US20110241407 Carbide block and sleeve wear surface |
| 10/05/2011 | CN202001057U Second conveyer revolving table of tunneling machine |
| 10/05/2011 | CN202001009U Connecting plate for large-diameter coal mining machine roller |
| 10/05/2011 | CN202001008U Split roller |
| 10/05/2011 | CN102206997A Heading machine |
| 10/05/2011 | CN101713975B Intelligent control system for automatic cutting formation of tunneling |