| Patents for E21C 35 - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or (6,127) |
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| 01/28/2010 | CA2681710A1 Method for controlling a cutting extraction machine |
| 01/27/2010 | CN201391331Y Integral in-hole drilling tool for drilling slotting punched hole of coal seam |
| 01/27/2010 | CN201391319Y Box-type mine guard board |
| 01/21/2010 | DE102006041572B4 Ausbauschild für den Untertagebau Longwall shield for underground mining |
| 01/20/2010 | CN201386560Y Tunneling machine capable of realizing high-precision manipulation |
| 01/19/2010 | US7648210 Pick with an interlocked bolster |
| 01/14/2010 | US20100007192 Cutting bit body and method for making the same |
| 01/13/2010 | EP2143872A1 Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element |
| 01/06/2010 | CN201377324Y Pick-shaped cutter |
| 01/06/2010 | CN201377323Y Improved pick-shaped cutter |
| 01/06/2010 | CN100577985C Shortwall mining forklift in underground mine |
| 01/06/2010 | CN100577984C Down-hole coal excavation apparatus |
| 01/05/2010 | US7641286 Plough guide for a chain-pulled plough |
| 12/30/2009 | WO2009155776A1 A dilling, loading, transporting and anchoring integration machine for laneway in coal mine |
| 12/30/2009 | CN201372798Y Conical cutting pick for coal cutter |
| 12/30/2009 | CN201372797Y Hydraulic oil cooling device of a boom-type road-header |
| 12/30/2009 | CN201372796Y Boom-type road-header arm body |
| 12/30/2009 | CN101614123A Sweeper for lower chain passage of carriage of coal planer |
| 12/30/2009 | CN101614122A Dumbbell for coupling carriage ledge of coal planer |
| 12/29/2009 | US7637574 Pick assembly |
| 12/23/2009 | CN201367905Y Bowl-shaped sheet hard rock cone-shaped bit |
| 12/23/2009 | CN101608546A Processing technology for prolonging service life of guiding slide shoes |
| 12/22/2009 | US7635168 Degradation assembly shield |
| 12/17/2009 | WO2009151949A1 Cutting tool with nozzle for spraying water on a cutter bit |
| 12/16/2009 | CN201363149Y Wear-resisting impact-resistance pick-like bit |
| 12/16/2009 | CN201363148Y Coronary anti-wearing cutting pick |
| 12/16/2009 | CN201363147Y Long-service life pick-like bit |
| 12/16/2009 | CN201363146Y Damping dust-falling pick-like bit |
| 12/16/2009 | CN201363145Y Cutting pick for coal mining and engineering |
| 12/16/2009 | CN201363144Y Development machine piggyback temporary support |
| 12/15/2009 | CA2427936C Cutting tool assembly with replaceable spray nozzle housing |
| 12/10/2009 | US20090306942 System and Method(s) of Mine Planning, Design and Processing |
| 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 |
| 12/10/2009 | DE202006020765U1 Rundschaftmeißel mit Meißelhalter Round shank bit with bit holder |
| 12/10/2009 | DE102009017971A1 Bildschirm Screen |
| 12/09/2009 | CN201358974Y Height adjusting oil cylinder of coal cutting machine |
| 12/09/2009 | CN201358787Y Arm-hammer type tunnel digging loader for coal mines |
| 12/09/2009 | CN201358786Y Involute carbide bit pick-shaped cutter used for mining machinery |
| 12/02/2009 | EP2128381A2 Tool for removing a cutting tool |
| 12/02/2009 | CN201354639Y Press-in pick-shaped bit |
| 12/02/2009 | CN100564806C Method and device for extracting extraction products in underground mining |
| 12/02/2009 | CN100564801C Coal plough guide device for chain hauled shearer |
| 12/02/2009 | CN100564799C Tool carrier for planer tool of coal picking machine and coal cutter and coal picking machine planer tool |
| 11/26/2009 | WO2009142578A1 Road grading pick with washer |
| 11/26/2009 | WO2009142577A1 Carbide block and sleeve wear surface |
| 11/26/2009 | US20090289493 Chisel Holder System |
| 11/26/2009 | CA2723825A1 Road grading pick with washer |
| 11/26/2009 | CA2723812A1 Carbide block and sleeve wear surface |
| 11/25/2009 | CN201351494Y Cutting pick remover |
| 11/19/2009 | WO2009139692A1 Sleeve with widening taper at rearward end of bore |
| 11/19/2009 | WO2009139691A1 Block and sleeve with rotation-inhibiting feature |
| 11/19/2009 | US20090284069 Pocket Protecting Retainable Cutter Bit |
| 11/19/2009 | CA2723281A1 Sleeve with widening taper at rearward end of bore |
| 11/19/2009 | CA2723278A1 Block and sleeve with rotation-inhibiting feature |
| 11/18/2009 | CN201347761Y High-performance diamond combined cutting pick |
| 11/17/2009 | US7618098 Cutting tool retention apparatuses |
| 11/11/2009 | CN201344033Y Remote console of tunneling machine |
| 11/11/2009 | CN201344032Y Complete device integrating the tunneling, protection and anchoring |
| 11/11/2009 | CN101575975A Dust removing method and device of cantilever-type comprehensive mechanized development machine |
| 11/11/2009 | CN101575974A Gathering arm style mechanical mucker |
| 11/10/2009 | US7614705 Water spray assembly |
| 11/05/2009 | US20090273225 Resilient Pick Shank |
| 11/03/2009 | US7611210 Cutting bit body and method for making the same |
| 11/03/2009 | US7611209 Reversible cutting tool with shield |
| 10/29/2009 | US20090267403 Resilient Pick Shank |
| 10/28/2009 | CN100553807C Internal sucking and external pressing smoke and dust collecting device |
| 10/20/2009 | CA2583523C Method and system for mining hydrocarbon-containing materials |
| 10/15/2009 | US20090255783 Arrangement for extracting extraction products in Underground extraction operations in caving |
| 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 | CN101555792A Gate-type nozzle of excavator with internal spraying |
| 10/14/2009 | CN101555791A Piston type nozzle of excavator which has internal spraying |
| 10/14/2009 | CN101555790A Excavator which can reduce temperature with high efficiency and has internal spraying |
| 10/13/2009 | US7600823 Pick assembly |
| 10/08/2009 | WO2009053903A3 A pick body |
| 10/06/2009 | US7597402 Tool holder |
| 10/01/2009 | WO2009120105A1 Device for wireless emergency and production signalling and communication |
| 09/30/2009 | CN201318176Y Pick holder |
| 09/30/2009 | CN201318175Y Cutting tooth |
| 09/29/2009 | US7594703 Pick with a reentrant |
| 09/29/2009 | US7594702 Highwall mining system for transporting mined material from a mined hole to an outside area |
| 09/17/2009 | DE202007018885U1 Schaftmeißel Studcutter |
| 09/16/2009 | EP2100005A1 Method for identifying blockages in sprinkler devices and apparatus for carrying out this method |
| 09/16/2009 | CN201310359Y Coal-winning machine data transmitting apparatus |
| 09/16/2009 | CN201310358Y Mineral-feeding cone objects for disc mineral feeder |
| 09/16/2009 | CN101532391A In-hole drilling tool integrating drilling, slotting and punching coal seam and using method thereof |
| 09/09/2009 | EP1945909B1 Circular-shank tool comprising a tool holder |
| 09/09/2009 | CN100538009C Device for producing a gas-liquid mixture in the vicinity of cutting tools |
| 09/03/2009 | DE102008010609A1 Chisel holder for use with chisel holder arrangement, has borehole for retaining of cylindrical shaft of chisel that is rotated around longitudinal axis, where channel is provided to form connection |
| 09/01/2009 | CA2583513C Method and system for mining hydrocarbon-containing materials |
| 08/27/2009 | WO2009103309A1 Method for automatically creating a defined face opening in plow operations in coal mining |
| 08/27/2009 | WO2009103307A1 Method for automatically creating a defined face opening in longwall coal mining operations |
| 08/27/2009 | WO2009103305A1 Method for controlling longwall mining operations by identifying boundary layers |
| 08/27/2009 | WO2009103304A1 Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations |
| 08/27/2009 | US20090212216 Mining methods and apparatus |
| 08/26/2009 | CN101514629A Rock cutting pick for coal mine working face coalcutter |
| 08/26/2009 | CN101513706A Method for processing wear-proof head separation prevention pickaxe type cutting pick |
| 08/26/2009 | CN100532785C Cutting tool |
| 08/26/2009 | CN100532784C Driving head for entry-driving machine |
| 08/19/2009 | CN201294691Y Power box stent for development machine |
| 08/19/2009 | CN201292850Y Linkage spraying device of loader |