| Patents for E21D 17 - Caps for supporting mine roofs (547) |
|---|
| 08/17/2011 | CN102155249A Method for supporting tunnel roof below mined-out area |
| 08/17/2011 | CN102155248A Method for supporting laneway below coal pillar |
| 08/17/2011 | CN102155245A Integral ejecting beam hydraulic bracket comprising telescopic beam |
| 08/17/2011 | CN101725368B Thick seam large mining height working face gob-side entry retaining method |
| 08/10/2011 | CN201924945U 一种抽拉式移动顶梁 One kind of pull-top beam moves |
| 08/10/2011 | CN201924944U 一种前探梁稳固装置 A pro probe beam solid device |
| 08/10/2011 | CN102146802A Front exploring beam for heading surface anchor rod support |
| 07/20/2011 | CN201902218U Anchor rod and anchor cable supporting device |
| 07/20/2011 | CN201902215U Forestope clamp ring reinforcing anti-release device for mine |
| 07/06/2011 | CN201891421U Hydraulic bracket |
| 07/06/2011 | CN101476471B Integral top beam |
| 06/22/2011 | CN201874593U Hanging device for fore poling bar |
| 06/22/2011 | CN101074605B Roof pretightening telescopic beam of emergent thin coal-bed lane and its supporting method |
| 06/15/2011 | CN201865679U Front canopy for shed-erecting support of driving working surface |
| 06/01/2011 | CN201851141U Novel stack type hydraulic support |
| 06/01/2011 | CN201851137U Forepole hoisting ring with movable opening |
| 06/01/2011 | CN101509384B Umbrella stent temporary support device |
| 05/18/2011 | CN201835844U Tilting prevention device for I-shaped steel support frame used in mine |
| 05/18/2011 | CN102061921A Down-dip mining method of shaped hydraulic bracket on long-wall working surface in direction of large dip angle coal bed |
| 05/11/2011 | CN201826876U Underground remote-control shield support used in delta region in mine |
| 05/11/2011 | CN201826868U Strength-constant and high-concave ladder type underground deep support device in coal mine |
| 05/11/2011 | CN201826864U Novel waste rock rolling prevention device |
| 05/11/2011 | CN201826861U Clam type support |
| 05/04/2011 | CN201818318U Support device for coal mine |
| 05/04/2011 | CN101586465B Construction method of large-diameter coal bunker flat-topping lid |
| 04/20/2011 | CN201802426U Roadway U-shaped steel support ceiling front canopy fixer |
| 04/20/2011 | CN201802425U Device for fixing E type front canopy and F type front canopy of I-shaped steel support |
| 04/20/2011 | CN201802424U Omega-shaped steel belt |
| 04/20/2011 | CN201802423U Shotcrete rock-bolt wire-mesh support forestope fixing device |
| 04/20/2011 | CN201802422U Fixer of front canopy of I-shaped steel roadway support |
| 04/20/2011 | CN201802421U Device for fixing beam support of U-shaped steel support for tunnel |
| 04/20/2011 | CN201802420U Device for fixing beam support of I-shaped steel support ceiling for tunnel |
| 04/07/2011 | WO2010129222A3 Systems and methods for reducing drag and/or vortex induced vibration |
| 04/06/2011 | CN201786368U Mining dynamometric reinforcing steel bar joist |
| 04/06/2011 | CN201786367U Mine steel bar joist |
| 04/06/2011 | CN102003192A Connecting locating device |
| 04/06/2011 | CN102003188A Method for supporting triangular area in coal mine support-dismantling process |
| 02/26/2011 | CA2713811A1 Mine roof and rib support |
| 02/16/2011 | CN201747387U Roadway supporting bracket |
| 01/13/2011 | WO2011006041A1 Longwall mining roof supports |
| 01/12/2011 | CN101943011A Constant-strength high-convex-ladder-shaped coal mine underground deep supporting device |
| 01/05/2011 | CN201696067U Hinged top beam lifter |
| 01/05/2011 | CN201696066U Double-wedge hinged top beam |
| 01/05/2011 | CN201696065U Forepole bar for driving face anchor bolt support |
| 01/05/2011 | CN201696060U Small support point full protection type roadway support |
| 01/05/2011 | CN201696058U Interlocker of anti-falling device |
| 12/29/2010 | CN201687503U Cantilever support mounting frame |
| 12/29/2010 | CN201687493U Multifunctional forepoling bar |
| 12/15/2010 | CN201671643U Advance support hydraulic bracket body for coal fully-mechanized mining working surface |
| 12/01/2010 | CN101899987A Coal mine roadway deep support construction method |
| 11/11/2010 | WO2010129222A2 Systems and methods for reducing drag and/or vortex induced vibration |
| 11/03/2010 | CN201620900U Alley way engineering beam mounting support |
| 11/03/2010 | CN201620899U Upper beam of hydraulic support |
| 11/03/2010 | CN201620898U Double-wing lifting type front canopy hoisting ring device |
| 11/03/2010 | CN101876520A Segment pre-blasting technology for steeply dipping hard coal seam roof |
| 10/28/2010 | WO2010122570A1 Tracking and monitoring system for opencast mines |
| 10/20/2010 | CN101864972A Small supporting point full-protection-type tunnel bracket and supporting method thereof |
| 10/13/2010 | CN101408106B Small tube shed pre-grouting method |
| 08/25/2010 | CN101812999A Telescopic type front canopy support |
| 08/04/2010 | CN201539269U Temporary support device of tunneling mechanism |
| 07/28/2010 | CN201535173U 一种组合式颚板 A modular jaw |
| 06/30/2010 | CN201517421U Hydraulic support and telescopic girder apparatus thereof |
| 06/23/2010 | CN101747524A Material for reinforcement of coal and rock and preparation process and application thereof |
| 06/16/2010 | CN201507315U Anti-tilting device of H-shaped steel bracket of mine roadway |
| 06/09/2010 | CN201502384U Headberam side guard plate protection device |
| 06/09/2010 | CN101725368A Thick seam large mining height working face gob-side entry retaining method |
| 05/19/2010 | CN101709652A Hydraulic support and telescopic girder device thereof |
| 05/12/2010 | CN201460929U Font canopy suspension rack |
| 05/12/2010 | CN201460928U Controllable type adjustable hydraulic beam erection device |
| 05/12/2010 | CN201460927U Multi-functional supporting beam for mine |
| 05/12/2010 | CN201460926U Z-shaped front canopy of roadway-repair timbering support |
| 05/05/2010 | CN1939972B Supporting reinforcement board and its production |
| 04/07/2010 | CN101021156B Gril capable of putting top coal |
| 03/24/2010 | CN201428467Y High-strength thin hinged roof beam |
| 12/16/2009 | CN201363157Y Gauge protecting member combined by steel bar supporting beam and W steel protecting plate |
| 11/25/2009 | CN201351453Y Jumbolter with temporary shoring |
| 11/25/2009 | CN101586465A Construction method of large-diameter coal bunker flat-topping lid |
| 11/19/2009 | US20090285641 Mine roof and rib support device |
| 10/21/2009 | CN201330614Y Forestope-fixing device |
| 10/21/2009 | CN201330610Y I beam support collapse preventer |
| 09/09/2009 | CN201306174Y An auto-joint pre-stressed metal top beam |
| 09/09/2009 | CN201306173Y Drivage face forestope hanging device |
| 09/09/2009 | CN101526001A Comprehensive mining opposite-pull working face coal excavating process for thin coal bed |
| 08/19/2009 | CN101509384A Umbrella stent |
| 08/12/2009 | CN201288575Y Top beam for low coal seam mining rack |
| 08/05/2009 | CN201284657Y Suspension stand with deviation corrector |
| 07/22/2009 | CN201277051Y U-shaped steel front cantilever apparatus |
| 07/15/2009 | CN101482022A Integral bottom girder |
| 07/08/2009 | CN101476471A Integral top beam |
| 07/01/2009 | CN201265423Y Temporary support |
| 06/24/2009 | CN201262091Y Novel support top beam |
| 06/24/2009 | CN201262090Y Mechanical top beam for mineral extraction |
| 06/17/2009 | CN100501129C Truss supporting technology for ingredient top slope deformation control |
| 04/15/2009 | CN101408106A Small tube shed pre-grouting method |
| 04/08/2009 | CN201218104Y Expansion beam used for thin seam hydraulic support |
| 03/04/2009 | CN201202482Y Front cantilever anchorage cable supporting and protecting device |
| 03/04/2009 | CN201202481Y Integral base girder |
| 03/04/2009 | CN201202480Y Integral top beam |
| 03/04/2009 | CN201202182Y Hot rolling channel steel |
| 02/05/2009 | WO2009017490A1 Lubricant grease supplying system and method of supplying lublicant grease using the system |