| Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602) |
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| 04/29/2009 | CN201228550Y Lower chain channel sweeper for sliding rack of plough |
| 04/29/2009 | CN201228546Y Height-adjusting device for head of plough |
| 04/15/2009 | EP1497536B1 Oscillating disc cutter with speed controlling bearings |
| 04/09/2009 | US20090090344 Monofilament metal saw wire |
| 03/12/2009 | US20090066148 Continuous miner having a sumping frame |
| 03/05/2009 | DE202008000527U1 Firstmeißelträgerverstellung und Sicherungselement hierfür Roof cutter holder adjustment and locking element therefor |
| 03/04/2009 | CN201202474Y Multifunctional full hydraulic chain groove type shoveling rock drill |
| 02/19/2009 | DE202008015772U1 Vorrichtung für tonlägige und steil einfallende Flöze Apparatus for tonlägige and steeply dipping coal seams |
| 02/17/2009 | US7490911 Drive device for rotating and oscillating a tool, and a compatible tool for mining |
| 02/11/2009 | CN101365864A Advance working and winning machine |
| 01/13/2009 | CA2637425A1 Method of estimating life expectancy of electric mining shovels based on cumulative dipper loads |
| 12/23/2008 | CA2583508C Method and system for mining hydrocarbon-containing materials |
| 11/26/2008 | CN100436753C Rock cutting machine |
| 11/19/2008 | CN101307690A Combined automatic control coal cutter |
| 11/12/2008 | CN201148869Y Rolling and matching structure of plough head and slide rack for coal planing machine |
| 11/06/2008 | WO2008131867A1 Device for determining the cutting horizon of a mining extraction system, and pan element therefor |
| 10/08/2008 | CN201129327Y Proportional servo hydraulic valve |
| 10/08/2008 | CN201129175Y Planing transport machine |
| 10/01/2008 | CN201125732Y Mine explosion prevention ingredient complete hydraulic crushing type mechanical boring machine |
| 09/24/2008 | CN101270661A Mine explosion-proof coal rock full hydraulic pulverizing development machine |
| 09/17/2008 | CN201116470Y Electric shovel rod connector |
| 08/21/2008 | US20080197690 Highwall Mining System, Conveyor Segment And Method For Providing Such A Mining System |
| 08/20/2008 | CN201103395Y Planning and conveying machine |
| 08/14/2008 | US20080191541 Geosteering detectors for rotary-type continuous miners |
| 08/13/2008 | CN201100128Y Integrated digger |
| 07/31/2008 | WO2008089509A1 Rock sampling apparatus |
| 07/31/2008 | CA2676343A1 Rock sampling apparatus |
| 07/23/2008 | CN201090213Y Coal picking-planing mill |
| 07/15/2008 | US7399039 Baseplate plow guide section |
| 07/01/2008 | US7393061 Coal plow cutter |
| 06/26/2008 | DE202007006122U1 Einrichtung zur Ermittlung des Schnitthorizonts einer Bergbaugewinnungsanlage und Rinnenelement hierfür Means for detecting the cutting horizon of a mining recovery plant and gutter member of this |
| 06/26/2008 | DE202007002119U1 Kettenrad für Kettenantriebe Sprocket for chain drives |
| 06/25/2008 | CN201078232Y Buffer for final mechanical spacing of coal planer plough |
| 06/25/2008 | CN100396881C Auger flight support for plural auger coal mining systems |
| 06/10/2008 | US7384104 Oscillating disc cutter with speed controlling bearings |
| 06/04/2008 | CN201068802Y Feedleg type rock drill safeguard device |
| 06/04/2008 | CN201068801Y Feedleg type rock drill |
| 05/22/2008 | US20080116734 Device for Milling Rock and Other Materials and Method for Milling Rock or the Like Using Said Device |
| 05/07/2008 | EP1815106B1 Coal-cutting machine |
| 04/30/2008 | CN101169037A Coal mining and digging machine |
| 04/22/2008 | US7360844 Geosteering detectors for boring-type continuous miners |
| 04/17/2008 | CA2665079A1 Rotatable cutting tool and cutting tool body |
| 04/15/2008 | US7357458 Boring rig |
| 04/09/2008 | EP1706585A4 Core breaker for an earth strata cutting assembly |
| 04/01/2008 | US7350876 Combination panline and utility drilling or bolting unit |
| 04/01/2008 | US7350875 Underground mining machine |
| 03/26/2008 | CN201040998Y Air-leg type rock drill |
| 03/25/2008 | US7347501 Plow baseplate |
| 03/12/2008 | CN201034028Y Non-blasting hydrodynamic shock coal cutting rising device |
| 03/06/2008 | WO2008025555A1 Method and apparatus for the milling cutting of materials |
| 03/06/2008 | DE102006037903B3 Belt`s direction stability monitoring and controlling device for use in mining industry, has pulse generator staying in connection with cylinder in adjusting device for adjustment of belt inverter by electro-hydraulical controller |
| 03/06/2008 | CA2661476A1 Method and apparatus for the milling cutting of materials |
| 02/20/2008 | CN201024909Y Improved taper slim pole |
| 01/31/2008 | WO2007035400A3 Link and chain for rock cutting |
| 01/30/2008 | CN201013373Y Coal mine down-hole short-wall mining forklift |
| 01/23/2008 | CN101111662A Device for milling rock and other materials and method for milling rock or the like using said device |
| 01/23/2008 | CN101109282A Tunneling machine |
| 01/17/2008 | US20080012418 Plow baseplate |
| 01/08/2008 | US7316456 Roadheading or mining machine with roof bolt drilling and setting devices |
| 01/03/2008 | DE102006030435A1 Plane box for holding a plane chain wheel of a plane extracting unit comprises a connecting plate inserted into a recess in the side part of a machine frame for supporting the torque |
| 01/01/2008 | US7314253 Plough for underground mining |
| 12/27/2007 | WO2007148251A1 A mining method and system for use therein |
| 12/27/2007 | WO2007120059B1 Cutting, drilling or grinding apparatus and method |
| 12/26/2007 | CN101092875A Impulse type coal winning machine, and stone catcher |
| 12/20/2007 | DE102006027955A1 Carriage for use in mining plane or coal plane for underground mining industry, has damping unit integrated into front part, which cooperates with associated anti-stop surface that is dampened in both driving directions |
| 12/19/2007 | CN101089364A Carriage for use in mining plane or coal plane for underground mining industry |
| 11/27/2007 | CA2471335C A mining or tunnelling device |
| 11/14/2007 | CN200975256Y 液压破碎锤钎杆 Hydraulic hammer drill rod |
| 11/07/2007 | CN200971883Y One cubic electric shovel operation valve |
| 11/07/2007 | CN200971781Y Height-regulating device for inverted hydraulic cylinder of breaker |
| 11/06/2007 | CA2343912C Mining machine and mining method |
| 11/01/2007 | US20070252425 System and method for cutting soluble scintillator material |
| 10/31/2007 | CN101065557A Coal-cutting machine |
| 10/31/2007 | CN101065542A Method and apparatus for forming cracks in concrete |
| 10/25/2007 | WO2007120059A1 Cutting, drilling or grinding apparatus and method |
| 10/18/2007 | DE19925949B4 Vorrichtung zur Ermittlung des Schneidhorizonts einer Bergbaugewinnungsmaschine Device for determining the cutting horizon of a mining winning machine |
| 10/16/2007 | US7282826 Driving device for sprocket wheels of chain drives |
| 10/10/2007 | EP1841949A1 Device for milling rock and other materials and method or milling rock or the like using said device |
| 10/10/2007 | CN101050704A Hydraulic crushing hammar drill rod |
| 09/20/2007 | US20070216216 Mining Apparatus With Precision Navigation System |
| 09/12/2007 | CN200946509Y Unmanned pneumatic coal cutter for ultrathin coal layer surface |
| 08/30/2007 | DE102006007530A1 Planer unit for extracting crude mineral material, has planer body displaceable with planer chain and chain channel, arranged on extraction side and other chain channel is arranged on displacement side of conveying trough |
| 08/16/2007 | WO2006079536A8 Device for milling rock and other materials and method or milling rock or the like using said device |
| 08/15/2007 | CN101016839A Shortwall mining forklift in underground mine |
| 08/08/2007 | EP1815106A1 Coal-cutting machine |
| 08/08/2007 | EP1664672A4 Geosteering detectors for boring-type continuous miners |
| 06/28/2007 | WO2007070900A1 Advance working and winning machine |
| 06/26/2007 | CA2361657C Cutting device |
| 05/09/2007 | CN1961134A Mining apparatus with precision navigation system |
| 05/01/2007 | CA2263216C Atmospheric detection system for an automated mining system |
| 04/26/2007 | US20070090677 Mining plow |
| 04/25/2007 | CN1952348A Mining plow |
| 04/19/2007 | DE102005049971A1 Carbon extraction planer e.g. sword planer, has chisel carriers whose swivelable support is designed as edge opened receiver, and slidable in assembly swivelable position parallel to supporting surface on swivelable bolts by receiver |
| 04/19/2007 | DE102005049318A1 Guiding device for guiding a chain-drawn sword plane comprises a guiding element consisting of a cast part extending over the length of the device and having pockets, a groove profile and/or guiding part |
| 04/19/2007 | DE102005049317A1 Sword plough, has recess limited by bracket part in both running directions of plough, where bracket part forms rigid component of middle sword plate part, which is provided with guide bracket and exhibits stop surface for shear link |
| 04/18/2007 | CN1948711A Sword plate |
| 04/18/2007 | CN1948710A Guiding device for guiding a chain-drawn sword plane |
| 04/18/2007 | CN1948709A Chisel support adjustment arrangement and corresponding production plane |
| 04/03/2007 | US7198332 Device for producing a gas-liquid mixture in the vicinity of cutting tools |
| 03/21/2007 | EP1763612A1 Method and apparatus for forming cracks in concrete |