| Patents for E21C 31 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam (738) |
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| 07/16/2009 | WO2009087078A2 Roof cutter holder adjustment device and securing element therefor |
| 04/01/2009 | CN201215015Y Starting stable development machine |
| 03/12/2009 | DE102007043043A1 Gewinnungsanlage insbesondere für den Bergbau und Verfahren zum Ansteuern der Gewinnungsanlage Recovery plant especially for mining and method of driving the recovery plant |
| 03/11/2009 | CN201206466Y Gear rack type turning device for coal mining development machine |
| 01/29/2009 | DE102007022439B4 Versorgungsleitungsstrang Supply wiring harness |
| 01/28/2009 | CN201187300Y Semi-closed type hydraulic system applied to development machine |
| 11/13/2008 | DE102007022439A1 Versorgungsleitungsstrang Supply wiring harness |
| 11/12/2008 | CN201148873Y Semi-motor drive device |
| 11/12/2008 | CN201148872Y Hydraulic device for controlling cutting head action of development machine |
| 11/05/2008 | CN201144699Y Lump cutting device for coal mining |
| 10/22/2008 | CN101289936A Hard rock tunneling machine |
| 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 |
| 08/27/2008 | CN101251011A Rack-and-pinion type slewing equipment of coal-excavating development machine |
| 08/27/2008 | CN101250291A Flame-resistant anti-static V belt swathe fractioning and preparation technique thereof |
| 08/27/2008 | CN101250289A Flame-resistant anti-static V belt under glue and preparation technique thereof |
| 08/20/2008 | CN201103394Y Cutting device of development machine |
| 08/06/2008 | CN201095984Y Coal cutter |
| 07/23/2008 | CN201090215Y Spider drive unit |
| 07/16/2008 | CN101220744A Development machine with narrow main body |
| 07/09/2008 | CN101215966A Tunneling machine cutting feed volume automatic control mode |
| 07/02/2008 | CN201080824Y Thin coal bed cutter side arm type cutting means |
| 06/25/2008 | CN201078231Y Development machine hydraulically driving device |
| 06/25/2008 | CN201078227Y Full hydraulically powered digger |
| 06/11/2008 | CN201071720Y Drum-type open continuous miner |
| 05/28/2008 | CN201065761Y Coal cutter hydraulic control drive device |
| 04/30/2008 | CN201053320Y Low coal seam hydraulic drag coal cutter |
| 04/30/2008 | CN101169037A Coal mining and digging machine |
| 04/16/2008 | CN201047284Y Down-hole hydraulic system capable of differentiating the type of hydraulic pipe |
| 04/16/2008 | CN101161989A Coal mine tunnel initating machine |
| 04/02/2008 | CN101153540A Roadheader |
| 03/19/2008 | CN101144382A Longitudinally arranged rocking arm for cutting motor |
| 03/19/2008 | CN101144381A Very thin seam coal winning machine with particular arranged motor |
| 03/05/2008 | CN201031697Y Coal mine down-hole continuously mining machine |
| 02/20/2008 | CN201025034Y Coal integrated mining cutter |
| 02/20/2008 | CN201025031Y Short and small light excavator |
| 01/30/2008 | CN201013843Y Decelerator of continuous miner cutting means |
| 01/30/2008 | CN201013375Y High-durability small-sized tunnelling machine cutter head hydraulically driving device |
| 01/30/2008 | CN201013374Y Tunneling machine cutting portion constant-power hydraulic system |
| 01/30/2008 | CN201013373Y Coal mine down-hole short-wall mining forklift |
| 01/23/2008 | CN201011304Y Swivelling mechanism of coal mining machine |
| 01/09/2008 | CN201003401Y Articulate folding and rotary cutting arm type cantalever tunnelling machine |
| 11/27/2007 | CA2471335C A mining or tunnelling device |
| 11/14/2007 | CN200975255Y Full hydraulic split crawler-type coal cutter |
| 10/24/2007 | CN101059162A Speed reducer of continuous coal cutter |
| 10/17/2007 | CN200961481Y Rock core drill gyrator |
| 10/10/2007 | CN101050703A Underground continuous tunnelling machine |
| 10/03/2007 | CN200955392Y Lane digger |
| 10/03/2007 | CN200955391Y Small energy-saving impaction type coal-production machine |
| 10/03/2007 | CN101048572A Gearing device for digging or crushing mechanism |
| 09/19/2007 | CN101037942A Small light mechanical boring machine |
| 09/12/2007 | CN200946511Y Thin coal layer coal cutter with specially-arranged motor |
| 09/12/2007 | CN200946510Y Rocking arm with longitudinally-disposed cutting motor |
| 08/29/2007 | CN200940484Y Curved cutting speed reducer for suspension arm type tunnelling machine |
| 08/22/2007 | CN101021150A Driving head for entry-driving machine |
| 08/15/2007 | CN101016839A Shortwall mining forklift in underground mine |
| 08/14/2007 | US7255406 Method for manufacturing track for auger boring machine |
| 07/18/2007 | CN2924010Y Driving device for mining machine |
| 06/13/2007 | EP1794414A1 A drive for a cutting or grinding machine |
| 05/02/2007 | CN2895739Y Coal production machine with reinforced guard |
| 03/20/2007 | US7192093 Excavation apparatus and method |
| 02/14/2007 | CN2869319Y Constant power dual-speed motor driving coal petrograph cutting device |
| 02/01/2007 | DE102005036359A1 Method for recovering coal comprises using a coal planing device having a coal plane which moves to and fro between a drive station and a reversing station with a reversing chain wheel |
| 12/20/2006 | CN1880724A Driving device for rotating tools with superimposed oscillatory movement and tool therefore |
| 09/27/2006 | CN1277041C Mining and tunneling device |
| 08/31/2006 | WO2006089349A1 An apparatus for driving a shaft in an excavating device |
| 06/28/2006 | CN2791248Y Rocking arm of coal producer |
| 06/08/2006 | US20060119188 Drive device for mining machines |
| 06/06/2006 | CA2414368C Extendable and retractable rotor arm assembly |
| 01/26/2006 | CA2579772A1 A drive for a cutting or grinding machine |
| 11/10/2005 | DE202004015038U1 Antriebseinrichtung für Bergbaugewinnungsmaschinen Drive means for mining winning machines |
| 09/22/2005 | US20050206216 Drum turning mechanism for continuous miners and longwall shearers |
| 07/21/2005 | US20050156460 Advance working or mining machine |
| 06/07/2005 | CA2358258C Swing drive assembly |
| 02/09/2005 | CN2677616Y Excavation machine |
| 01/19/2005 | CN1566616A Machine carried electric traction coal-mining machine with short main body |
| 10/06/2004 | CN2646385Y Double cutting electric machine rocker arm for thin seam coal winning machine |
| 10/06/2004 | CN2646384Y Four-quadrant running frequency variable speed adjustable device of electrical haulage shearer |
| 08/18/2004 | CN2634118Y Short machine body carried electric tracting coal cutting machine |
| 06/22/2004 | US6752282 Swing drive assembly |
| 05/12/2004 | CN1496437A Mining and tunnelling device |
| 09/17/2003 | CN2573675Y Shortwall coal mining machine with cutting motor transversely placed on machine body |
| 08/14/2003 | WO2003067022A1 A mining or tunnelling device |
| 07/16/2003 | CN2560757Y Quasi airborne electric drawing apparatus for coal mining machine |
| 06/19/2003 | US20030111892 Method of mining and an improved mining machine with a shovel moveable relative to a vehicle chassis |
| 04/17/2003 | DE10205124C1 Extraction machine, for digging out hard rock e.g. platinum ore, has an eccentric shaft through a sleeve supported in a housing, as the drive for a cycloid gear to power the cutters |
| 03/13/2003 | DE20215788U1 Drive unit for a mining machine has protective hood over drive shaft and protective pockets for the hood fixing screws |
| 06/13/2002 | US20020069562 Boom suspension assembly |
| 05/16/2002 | US20020057961 Swing drive assembly |
| 04/05/2002 | CA2358265A1 Boom suspension assembly |
| 10/23/2001 | US6305754 Tunnel excavator with S-shaped soil plate |
| 07/31/2001 | US6267211 Drive unit for machinery, especially mining machinery |
| 05/01/2001 | US6224164 Mining machine with detachable articulated cutting assembly |
| 01/17/2001 | EP0943051B1 Device for damping vibrations in a part-face cutting machines |
| 10/12/1999 | US5964507 Apparatus for mining a mineral seam |
| 09/22/1999 | EP0943051A1 Device for damping vibrations in a part-face cutting machines |
| 07/15/1999 | DE19815445C1 Drive group for rock winning machine |
| 07/13/1999 | US5921632 Method and apparatus for extending the cutter drum of a boring machine |
| 06/17/1999 | DE19752242A1 Antriebsstrang für Kettenförderer Drive train for chain conveyors |