| Patents for E21C 31 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam (738) |
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| 01/08/2014 | CN103498674A Composite rotary-cut mining machine |
| 01/08/2014 | CN103498673A Method and apparatus for converting rotary motion into reciprocating impact motion |
| 01/08/2014 | CN103498671A Mining machine with rocker arm provided with coal-passing space |
| 01/01/2014 | CN103485778A Three-level plane-type cutterhead system with adjustable rotating speed at all levels for full face rock tunnel boring machine |
| 12/25/2013 | CN203362160U Drum coal mining machine rocker arm device |
| 12/25/2013 | CN103470255A Five-bit spiral-drill coal mining device convenient for switching drilling rods |
| 12/25/2013 | CN102305066B Coal mining machine and cutting roller device |
| 12/04/2013 | CN103422857A Adjustable tractive unit of coal cutter |
| 11/27/2013 | CN103414278A Cutting motor of coal mining machine |
| 11/20/2013 | CN103398145A Cutting speed reducer and cutting portion of continuous miner and continuous miner |
| 11/13/2013 | CN103388476A Method for damage-proof drive part unit and damage-proof drive part unit implementing method |
| 11/06/2013 | CN203271737U Coalcutter cutting head at high-speed end of planetary reducer |
| 11/06/2013 | CN103382840A Punch-cutting mining method and punch-cutting mining machine implementing method |
| 11/06/2013 | CN103382839A Method for maintaining vertical impact of impact mechanism and vertical lift punch-cutting mining machine implementing method |
| 11/06/2013 | CN102287185B High-power heavy low seam mining machine |
| 11/06/2013 | CN102268991B Power speed change heading machine |
| 10/30/2013 | CN203257415U Hanging body extremely-thin coal seam twin-roll chainless internal traction coal mining machine |
| 10/23/2013 | CN203248155U Integral reversing device |
| 10/23/2013 | CN102278111B Development machine and star wheel driving device thereof |
| 10/16/2013 | CN103352698A Drum shearer rocker arm device |
| 10/16/2013 | CN103352697A Method for guiding multi-point support of reciprocating impactor, and apparatus for guiding multi-point support of reciprocating impactor through enforcing it |
| 10/02/2013 | CN103334750A Novel shearer rocker arm |
| 10/02/2013 | CN103334749A Efficient impact anti-twist method and efficient impact anti-twist power box used for implementing the method |
| 10/01/2013 | US8544960 Chain guide for a driving chain of a mining machine |
| 09/25/2013 | CN203214058U Bidirectional punching mining machine |
| 09/25/2013 | CN102352750B Heading machine and star wheel external-teeth driving device for heading machine |
| 09/19/2013 | WO2013135076A1 Vibration damping device and engineering mechanical equipment |
| 09/18/2013 | CN203201981U Anti-rotation device for planetary mechanism of rocker arm of thin seam coal winning machine |
| 09/11/2013 | CN203189016U Low-noise ore mining equipment |
| 09/11/2013 | CN203189014U Vertical shearer with large inclination angle |
| 09/11/2013 | CN103291295A Method for preventing reciprocating impact wear by roller and reciprocating impact excavator's wearproof roller |
| 09/11/2013 | CN103291291A Rolling friction or suspension friction impact excavating method and antiabrasion impact excavator for implementing the same |
| 09/11/2013 | CN102352755B 方箱盾构机 Square box shield machine |
| 09/04/2013 | CN203175555U Cutting unit of heading machine |
| 09/04/2013 | CN203175553U Cutting unit of heading machine |
| 09/04/2013 | CN102797459B Cutting mechanism of excavating machine and excavating machine |
| 08/28/2013 | CN103266892A Continuous coal cutter |
| 08/28/2013 | CN103266891A Cutting part and continuous coal cutter |
| 08/21/2013 | CN203145938U Electrical haulage shearer |
| 08/21/2013 | CN203145937U Pitching angle adjusting mechanism of electric traction coal mining machine |
| 08/21/2013 | CN102287186B Self-positioning system and self-positioning method for coal mining machine |
| 08/14/2013 | CN103244117A Coal mining machine rocker arm with telescopic slotting mechanism |
| 08/06/2013 | US8500207 Rock claw for demolition hammer |
| 07/31/2013 | CN203097892U Roadway periphery grooving machine |
| 07/24/2013 | CN203081442U Telescopic device of hard rock tunnel boring machine |
| 07/24/2013 | CN203081441U Manual-remote integrated vehicle-mounted device of master-slave control-type underground remote control scraper |
| 07/24/2013 | CN203081439U Emulsion-driven low seam mining machine |
| 07/18/2013 | WO2013104024A1 Mining machine and shaft assembly for a mining machine |
| 07/17/2013 | CN203066964U Front-end transmission case of drill-type coal mining machine |
| 07/17/2013 | CN103206214A Continuous milling machine and traveling and loading control system |
| 07/17/2013 | CN103206213A Method for retaining vertical impact of impacting mechanism and vertical-lift impact-cutting digger implementing same |
| 07/10/2013 | CN203050702U Heading end adjusting device of coal mine heading machine |
| 07/10/2013 | CN203050701U Traction part with bridge-type structure for low-seam coal-mining machine |
| 07/10/2013 | CN203050700U Coal mining machine traction transmission device |
| 07/10/2013 | CN203050692U Drill loader |
| 07/10/2013 | CN203050691U Bidirectional material impacting device |
| 07/10/2013 | CN203050690U Vertical lifting and cutting mining machine |
| 07/10/2013 | CN103195428A Extra-thin coal seam bottom climbing type comprehensive exploitation technology |
| 07/10/2013 | CN103195420A Method for buffering reciprocating impact tunneling counter-acting force and buffering heading machine adopting the method |
| 07/03/2013 | CN203035197U Crawler type double-shaft coal excavating machine |
| 06/27/2013 | WO2012156884A3 Mining installation for extracting seam-type or mass-deposit mineral materials, and mining machine for the same |
| 06/26/2013 | CN103174802A Speed reducer and continuous miner with same |
| 06/26/2013 | CN103174416A Multi-point driving electric traction coal mining machine |
| 06/19/2013 | CN103161463A Dynamic oiling device used for hydraulic system of coal mining machine |
| 06/19/2013 | CN102182816B Connecting structure and connecting process of gear ring and housing of speed reducer of cutting part of coal excavator |
| 06/19/2013 | CN102168698B Valve plug of height adjustment reversing valve and girth welding process thereof for height adjustment system of coal mining machine |
| 06/12/2013 | CN202992036U Cutting speed reducer of continuous coal mining machine |
| 06/12/2013 | CN202991034U Swing mechanism for heading machine |
| 06/12/2013 | CN103147750A Cutting part of heading machine |
| 06/06/2013 | WO2012156842A3 Apparatus for the milling cutting of rock, minerals or other materials |
| 06/05/2013 | CN202970715U Automatic miniature coal mining system suitable for model test |
| 06/05/2013 | CN103132996A Large inclination angle vertical shearer |
| 05/10/2013 | WO2013028558A3 All electric powered mobile jumbo drill machine |
| 05/08/2013 | CN202926325U Alternative-current traction coal mining machine of thin coal seam |
| 05/08/2013 | CN103089259A Bidirectional pounding and cutting excavating method and bidirectional pounding and cutting excavator for implementing same |
| 05/01/2013 | CN202914096U Rocker arm of shock-resistant coal mining machine |
| 05/01/2013 | CN103075154A Front end transmission case of drilling-type coal mining machine |
| 05/01/2013 | CN103075152A Drill loader |
| 04/24/2013 | CN202900275U High reliability rocker arm of coal mining machine |
| 04/24/2013 | CN202900274U Longitudinal and transverse cutting type thin coal seam lump coal mining machine |
| 04/24/2013 | CN103061757A Device for adjusting tunneling head of coal mine heading machine |
| 04/17/2013 | CN202882913U Coal mining machine and towing device thereof |
| 04/17/2013 | CN103046927A Deflectable cutting device of coal mining machine |
| 04/10/2013 | CN102278424B Cutting speed reducer of tunnel boring machine |
| 04/04/2013 | WO2013044620A1 Slewing mechanism and tunneling machine |
| 04/04/2013 | US20130082510 Slow turning drum for a miner |
| 04/03/2013 | CN202851912U Lubricating cooling system of cutting reducer of horizontal shaft heading machine |
| 03/27/2013 | CN202833590U Motor and coal mining machine |
| 03/27/2013 | CN202832535U Cantilever type coal cutter rocker arm |
| 03/27/2013 | CN202832534U Mini-type heading machine dual-motor cutting device |
| 03/27/2013 | CN202832528U Cantilever type electric traction coal cutter |
| 03/27/2013 | CN102996130A Automatic micro-coal extraction system suitable for model test |
| 03/27/2013 | CN102996123A Bidirectional material impacting method and bidirectional material impacting device |
| 03/20/2013 | CN202810848U Variable-frequency heading machine |
| 03/20/2013 | CN202810845U Comprehensive mechanization rock gangway dig-anchor machine |
| 03/13/2013 | CN202788844U Height adjusting system of variable frequency speed-regulating chainless electric traction coal mining machine |
| 03/13/2013 | CN202788843U Rocker arm of drum type coal mining machine |
| 03/13/2013 | CN202788842U Hauling part transmission system of variable frequency speed chainless electrically-hauled shearer |
| 03/13/2013 | CN202788839U Cutting device driven by permanent-magnet machine for comprehensive mechanical rock roadway driving anchor winch |
| 03/13/2013 | CN202788838U Cutting and wedging vibrating type operating mechanism for tunneling machines and coal mining machines |