| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 05/11/2011 | CN102052080A Mechanical drive dual-disc development device for development machine |
| 05/04/2011 | CN201818308U Cutting head driving device of heading machine |
| 05/04/2011 | CN201818307U Retractable cutting arm of tunneling machine |
| 05/04/2011 | CN101575972B Crossed chain-cutting narrow crawler double-push liquid wedge and support type stone tunnelling machine |
| 04/27/2011 | CN201810311U Retractable cantilever of heading machine |
| 04/27/2011 | CN201810310U Modular alternating current traction coal mining machine |
| 04/27/2011 | CN201810309U Improved engineering machine based on digger |
| 04/27/2011 | CN201810308U Cutting mechanism of development machine |
| 04/27/2011 | CN201810307U Cutting mechanism for heading machine |
| 04/27/2011 | CN101634225B Excavation type tunnel excavator |
| 04/20/2011 | CN201802440U Height adjustable structure of first conveyer machine tail for tunneling machine |
| 04/20/2011 | CN201802405U Diesel engine type drum open continuous miner |
| 04/20/2011 | CN201802403U Continuous coal mining machine shoveling plate |
| 04/20/2011 | CN201802399U Cutting arm of continuous coal cutter |
| 04/20/2011 | CN201802398U Hard rock boring machine |
| 04/20/2011 | CN102022122A Support-type comprehensive tunneler |
| 04/20/2011 | CN101516772B Transportation of sulphur from solid sulphur deposits, in blocks of large dimensions |
| 04/14/2011 | US20110084540 Manhole remover |
| 04/13/2011 | CN201794587U Two-cylinder supporting device of cutting arm of tunneling machine |
| 04/13/2011 | CN102011585A Lump coal cutter |
| 04/07/2011 | US20110080034 Milling machine, in particular surface miner, and method for mining milled material of an open cast surface |
| 04/06/2011 | CN201786359U Long-stroke pipeline propulsion device |
| 04/06/2011 | CN201786358U Longitudinal-axis type double-cutting-head hydraulic welding cutting arm |
| 04/06/2011 | CN102003183A Intelligent type heading machine |
| 04/06/2011 | CN102003179A Saw blade type cave development machine |
| 04/06/2011 | CN102003178A Retractable tunneling machine convenient for underground transport |
| 04/06/2011 | CN101408105B Digging mechanism of cantilevered type digging machine |
| 04/06/2011 | CN101302934B Coal mining method with three steps |
| 03/30/2011 | CN101994511A Construction technique for cutting and splitting rectangle grooves of railway and road tunnel |
| 03/23/2011 | CN201771494U Large-slope continuous miner |
| 03/23/2011 | CN201771493U Double-knife coal cutter |
| 03/23/2011 | CN201771492U Cutting roller of coal cutter |
| 03/23/2011 | CN201771491U Cutting mechanism of tunneling machine |
| 03/23/2011 | CN101358528B Roadheader with remote control member |
| 03/17/2011 | US20110062768 Mining Machine and Method of Mining |
| 03/16/2011 | CN201763337U Swiveling mechanism bearing device of second conveyor of tunneling machine |
| 03/16/2011 | CN201763336U Roller of coal mining machine |
| 03/16/2011 | CN201763335U Cutting arm sliding guide rail device of heading machine |
| 03/16/2011 | CN201763334U Coal mining machine and mining height system thereof |
| 03/16/2011 | CN201763333U Electric traction shearer for ultra thin coal seam |
| 03/16/2011 | CN201763332U Cantilever type cutting device of low seam mining machinery |
| 03/16/2011 | CN201763331U Heading machine |
| 03/16/2011 | CN201763330U Cutting head device of heading machine |
| 03/16/2011 | CN101985877A High pressure water jet cutting drum coal dropping double power shearer |
| 03/09/2011 | CN201756980U Material transport vehicle for mining tunnel |
| 03/09/2011 | CN201756959U Mixed cutting teeth coal mining machine drum |
| 03/02/2011 | CN201753453U Hydraulic loader-digger |
| 03/02/2011 | CN101598018B Alpine bolter miner back affiliating travel type breaking and transhipping continuous transporting device |
| 03/02/2011 | CN101457641B Development machine cutting telescopic arm with pipeline lifting chain |
| 02/23/2011 | CN101981269A Drilling unit, method for slot drilling and slotting device |
| 02/17/2011 | US20110037308 Continuous miner center drum with offset split surfaces |
| 02/17/2011 | DE102007047215A1 Mountain cutting tool useful as chisels and drill bits for mining extraction machines, comprises carbide cutting inserts, where the tool is produced by casting in a casting mold with the target of increasing the wear resistance |
| 02/16/2011 | CN201747371U Scraper machine tensioning device of development machine |
| 02/16/2011 | CN201747370U Digging machine with machine digging operation function and drill carriage drilling operation function |
| 02/16/2011 | CN201747369U Drilling arm collision-prevention device of hydraulic rock-drilling machine |
| 02/16/2011 | CN201747368U Spiral drum for coal-winning machine |
| 02/16/2011 | CN201747367U Opencut coal mine coal mining and stripping machine with adjustable roller height |
| 02/16/2011 | CN101975061A Coal winning machine and mining height system thereof |
| 02/16/2011 | CN101463723B Water supply mechanism for cutter head shaft of development machine |
| 02/16/2011 | CN101169036B Pedrail type lifting top slope anchor shaft anchor cable construction drilling machine and single-alley fast tunneling technique |
| 02/09/2011 | CN201738924U Dual-power coal mining machine with seam-cutting high-pressure water jet flow and coal dropping roller |
| 02/09/2011 | CN201738923U Coal mining machine for layer mining |
| 02/09/2011 | CN201738922U Floor-based shearer |
| 02/09/2011 | CN201738921U Roadheader and floating sealing device of the same |
| 02/09/2011 | CN101970795A Method for controlling longwall mining operations |
| 02/09/2011 | CN101967990A Hydraulic support with excavating function |
| 02/09/2011 | CN101967972A Mining equipment and spraying system thereof |
| 02/02/2011 | EP2188493B1 Roller drill or roller bit |
| 02/02/2011 | CN201730619U Drill loader |
| 02/02/2011 | CN201730618U Mining groove cutting equipment |
| 02/02/2011 | CN201730617U Entry driving machine |
| 02/02/2011 | CN201730616U Development machine and floating sealing device thereof |
| 02/02/2011 | CN101629807B Position and attitude parameter measurement system of machine body of boring machine and method thereof |
| 02/02/2011 | CN101509373B Semiclosed drum of coal cutter with coal ploughing plate |
| 01/27/2011 | US20110018332 Method and Apparatus for Mining a Material in an Underground Environment |
| 01/26/2011 | CN1997809B Device and method for moving a mine conveyor segment |
| 01/26/2011 | CN101956552A Roller for mixed row cutting tooth coal winning machine |
| 01/19/2011 | CN201714384U Spading plate with auxiliary material collecting device |
| 01/19/2011 | CN201714383U Compact continuous coal miner |
| 01/19/2011 | CN101949290A Method for realizing overload protection of coal mining machine by adjusting rotary drum height of coal mining machine |
| 01/13/2011 | US20110006587 Water Spray Assembly etc. |
| 01/12/2011 | CN101946061A Heading work machine having drill head made of disk tools |
| 01/12/2011 | CN101942998A Development machine and floating sealing device thereof |
| 01/12/2011 | CN101942963A Vehicle hydraulic drill |
| 01/05/2011 | CN201696047U Mining equipment and walking device thereof |
| 01/05/2011 | CN201696042U Tunneling machine |
| 01/05/2011 | CN201696041U Double-platform four-arm drilling, loading, conveying and anchoring integrated machine for coal roadways |
| 01/05/2011 | CN101936160A Three-soft coal bed rotary-cut drilling elimination outburst method and rotary-cut drilling device |
| 12/29/2010 | CN201687476U Conveyor groove and conveyor |
| 12/29/2010 | CN201687471U Excavating, loading and conveying unit |
| 12/29/2010 | CN101476464B Double-row driving chainless traction system of coal mining machine |
| 12/22/2010 | CN201679499U Sideslip resistant tunneling machine |
| 12/22/2010 | CN101922290A Coal-rock interface identification method, identification system and identification probe |
| 12/16/2010 | US20100314931 Heading Machine Having Cutting Unit Made of Disc Tools |
| 12/15/2010 | CN201671631U Telescopic shovel plate |
| 12/15/2010 | CN201671629U Dynamic system of excavating loader |
| 12/15/2010 | CN101915096A Development machine |
| 12/15/2010 | CN101915095A Drill loader |
| 12/14/2010 | CA2484388C Oscillating disc cutter with speed controlling bearings |
| 12/08/2010 | EP2257687A1 Drilling unit, method for slot drilling and slotting device |