| Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602) |
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| 10/12/2011 | CA2736669A1 Self-propelled surface milling machine with electrical mill roll drive |
| 10/12/2011 | CA2736651A1 Self-propelled working machine with electrical drive system and processes for operating the same |
| 10/05/2011 | CN202001010U Frame assembly for coal planer |
| 10/05/2011 | CN1952348B Mining plow |
| 10/05/2011 | CN102206998A Control system for coal planer |
| 10/05/2011 | CN102205260A Emulsion traveling crusher |
| 10/01/2011 | CA2735055A1 Dipper door retarding mechanism |
| 10/01/2011 | CA2698850A1 Dipper door retarding mechanism |
| 09/28/2011 | CN102203381A Heading or extraction machine |
| 09/21/2011 | CN201982094U 一种无键联接液压回转气动冲击凿岩机 A non-pneumatic shock coupling hydraulic rotary drilling machine |
| 09/14/2011 | CN101512101B Method and apparatus for the milling cutting of materials |
| 09/07/2011 | CN102174889A Coal planer |
| 08/31/2011 | CN102168558A Self-walking lifting full-hydraulic auger coal mining machine |
| 08/31/2011 | CN102168557A Spinning coal mining machine |
| 08/25/2011 | WO2011103051A1 Articulated pre-skimmer mount |
| 08/24/2011 | CN201943695U 一种刨煤机 One kind Plow |
| 08/16/2011 | DE202010000455U1 Gewinnungshobel Mining plow |
| 08/11/2011 | US20110193398 Heading or extraction machine |
| 08/11/2011 | DE10196407B4 Ausdehnbare und zurückziehbare Rotorarmanordnung Extendable and retractable rotor arm assembly |
| 08/08/2011 | DE202010000457U1 Gewinnungshobel Mining plow |
| 08/04/2011 | WO2011093777A1 Method and device for working rock |
| 08/04/2011 | CA2786925A1 Method and device for working rock |
| 08/03/2011 | CN101089364B Carriage for use in mining plane or coal plane for underground mining industry |
| 07/20/2011 | CN201902208U Self-adaption hard rock impact rotary crushing system |
| 07/06/2011 | EP2340355A1 Method and device for working rock |
| 07/05/2011 | CA2445846C Rock breaker tool |
| 06/29/2011 | CN201884029U Belt driving wheel type breaker with an integrated breaking tank |
| 06/29/2011 | CN102108863A Coal plough rack assembly |
| 06/29/2011 | CN101614123B Sweeper for lower chain passage of carriage of coal planer |
| 06/22/2011 | CN201874570U Hydraulic breaking hammer |
| 06/08/2011 | CN201857964U Saw-blade type tunnel boring machine |
| 06/01/2011 | CN102080543A Cobalt crust stripping shovel |
| 06/01/2011 | CN102080542A Manganese nodule collecting shovel |
| 05/26/2011 | WO2010122466A3 Bit arrangement for a mining plough, and mining plough for plough systems |
| 05/26/2011 | WO2010122465A3 Mining plough for plough systems and plough system for inclined formation |
| 05/25/2011 | EP2324158A1 Attachment cutting system having cutting heads and a cutter chain |
| 05/25/2011 | CN201843613U Excavating impulsion shovel |
| 05/25/2011 | CN102071937A Multi-metal sulfide mining shovel |
| 05/19/2011 | WO2011059349A2 Method for mounting a ranging arm on a body of a longwall shearer loader |
| 05/19/2011 | WO2011059348A2 Drive transmission method in a longwall shearer loader |
| 05/19/2011 | WO2011057603A2 Compact roadheader |
| 05/19/2011 | US20110115277 Method for steering a mining machine cutter |
| 05/19/2011 | CA2780734A1 Compact selective cutting machine |
| 05/19/2011 | CA2780313A1 Method for mounting a ranging arm on a body of a longwall shearer loader |
| 05/19/2011 | CA2780312A1 Drive transmission method in a longwall shearer loader |
| 05/18/2011 | CN201835831U Digging and conveying fully-mechanized mining unit for high-pitch long-wall working face |
| 05/18/2011 | CN201835830U Planning and transporting machine |
| 05/11/2011 | CN201826841U Coal mining equipment and crushing mechanism thereof |
| 05/11/2011 | CN201826839U Wear-resistant guiding device of coal planer planning body |
| 05/04/2011 | CN102042016A Adaptive hard-rock impact rotary crushing system |
| 04/28/2011 | DE202011003248U1 Hobelvorrichtung Planer |
| 04/27/2011 | EP2313611A1 Mining machine and method of mining |
| 04/27/2011 | EP2235325B1 Roof cutter holder adjustment device and securing element therefor |
| 04/27/2011 | CN201810312U Tunnel mining machine |
| 04/21/2011 | WO2011044877A2 Shearer loader having an integrated anchor setting unit |
| 04/20/2011 | CN201802400U Drilling milling and beam assembling all-in-one machine for coal roadway |
| 04/13/2011 | CN101065557B Coal-cutting machine |
| 04/07/2011 | WO2011038436A2 Advancing machine |
| 04/06/2011 | CN102003179A Saw blade type cave development machine |
| 03/23/2011 | CN201771495U 轮廓截割装置 Contour cutting device |
| 03/23/2011 | CN101270661B Mine explosion-proof coal rock full hydraulic pulverizing development machine |
| 03/17/2011 | WO2011029111A2 Tunneling machine or extraction machine |
| 03/17/2011 | US20110062768 Mining Machine and Method of Mining |
| 03/16/2011 | CN101985878A Tunnel mining machine |
| 03/09/2011 | CN201756960U Rotary joint device for a plough chain of a coal plough |
| 03/03/2011 | WO2011022744A2 Selective cut heading machine or advance working machine |
| 03/03/2011 | US20110049965 Apparatus and method for mining coal |
| 03/01/2011 | US7896445 Method and apparatus for the milling cutting of materials |
| 02/17/2011 | DE112006003436B4 Vortriebs- und Gewinnungsmaschine Heading and extraction machine |
| 02/09/2011 | CN1904312B Method for the mining of coal and coal planer installation |
| 02/02/2011 | CN101050704B Hydraulic crushing hammer drill rod |
| 01/26/2011 | CN101956553A Drill rod for hydraulic breaking hammer |
| 01/19/2011 | CN201714381U Chain stopping device for chain tensioning for plough chain of coal plough |
| 01/19/2011 | CN201714380U Structure for pin connection of plough head revolving body and plough base body of coal plough |
| 01/19/2011 | CN201714379U Supporting structure for replacing plough head skidding shoe of coal plough |
| 01/19/2011 | CN201713752U Cooling dust suppression device of drill rod of breaking hammer |
| 01/06/2011 | US20110001348 Method for Controlling Longwall Operations Using Boundary Layer Recognition |
| 12/30/2010 | DE112008003294T5 Zerkleinerungs-oder Aushubwerkzeug mit einem Einsatz aus einem Wolframcarbid-Hartmetall und einem Ring Crushing or Excavation tool with an insert of a cemented tungsten metal and a ring |
| 12/29/2010 | CN201687472U Coal planer and planer chain connecting device thereof |
| 12/16/2010 | US20100314931 Heading Machine Having Cutting Unit Made of Disc Tools |
| 12/14/2010 | CA2484388C Oscillating disc cutter with speed controlling bearings |
| 12/08/2010 | CN201666150U Device for adjusting clearance between shovel rod gear and rack on excavator |
| 12/08/2010 | CN1948711B Sword plate |
| 12/08/2010 | CN101910559A Roof cutter holder adjustment device and securing element therefor |
| 12/08/2010 | CN101910558A Advancing machine |
| 12/08/2010 | CN101910557A Advancing machine |
| 12/08/2010 | CN101906969A Coal mining device and crushing mechanism thereof |
| 12/02/2010 | US20100301660 Cooling a ranging arm gear case on a longwall shearer |
| 11/24/2010 | CN201650285U Coal mining loader |
| 11/24/2010 | CN201650284U Four-bit auger miner |
| 11/17/2010 | CN201635742U Fastening device for plough head of coal plough |
| 11/17/2010 | CN101889127A Breaking or excavating tool with cemented tungsten carbide insert and ring, material removing machine incorporating such a tool and method of manufacturing such a tool |
| 11/10/2010 | CN101883911A Breaking or excavating tool with cemented tungsten carbide insert and ring, material removing machine incorporating such a tool and method of manufacturing such a tool |
| 11/10/2010 | CN101881163A Continuous miner and running part thereof |
| 11/04/2010 | US20100276986 Cutter drum extension mechanism |
| 11/04/2010 | US20100276985 Noise reduced continuous miner |
| 11/03/2010 | CN201623616U Coal mine machine and transmission system thereof |
| 10/28/2010 | WO2010122466A2 Bit arrangement for a mining plough, and mining plough for plough systems |
| 10/28/2010 | WO2010122465A2 Mining plough for plough systems and plough system for inclined formation |
| 10/28/2010 | US20100270849 Heading machine |