| Patents for E21D 23 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyers, mining machines, or guides therefor (3,544) |
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| 05/23/2013 | DE102012102458B3 Höhensteuerungssystem für eine Kohlenhobelanlage und Kohlenhobelanlage Height control system for a coal plow plant and coal plow system |
| 05/22/2013 | CN202946179U 125L/min safety valve for coal-mine hydraulic bracket |
| 05/22/2013 | CN202946178U Entire roadway anchor protection all-in-one machine |
| 05/22/2013 | CN202946177U Improved hydraulic support used for coal mines |
| 05/22/2013 | CN202946176U Steep grade fully mechanized coal mining face hydraulic support between-support double-opening waste stone blocking door device |
| 05/22/2013 | CN202946175U Hydraulic support column nest purpose curved face polyurethane filler |
| 05/22/2013 | CN202946174U Hydraulic support and side protective plate thereof |
| 05/22/2013 | CN103114867A Automatic straightening method and system for hydraulic supports and scraper conveyors of fully-mechanized coal mining working faces |
| 05/22/2013 | CN103114866A Lateral push device of hydraulic support |
| 05/22/2013 | CN102094663B Machine-mounted multifunctional cantilever supporting machine |
| 05/22/2013 | CN101975077B High-outburst coal mine coal roadway drilling-loading-bolting integrated machine |
| 05/15/2013 | CN202937289U Unit frame of fully-mechanized coal mining hydraulic support assembling frame |
| 05/15/2013 | CN202937288U Rear top beam front-back filling hydraulic support with hinged telescopic blocking plate |
| 05/15/2013 | CN202937287U Bottom-stepping-type hydraulic retaining and protecting frame for coal faces |
| 05/15/2013 | CN202937286U Mechanical lengthening rod stand column suitable for hydraulic support |
| 05/15/2013 | CN103104279A Unit frame for assembly frame of fully-mechanized coal mining hydraulic support frame |
| 05/15/2013 | CN103104278A Hydraulic support entrucking device |
| 05/15/2013 | CN103104277A Multi-step-pitch band tail beam supporting-type filling hydraulic support |
| 05/15/2013 | CN103104276A Preposition and postposition filling hydraulic support with rear top beam provided with hinge telescopic blocking board |
| 05/15/2013 | CN103104275A Gangue filling hydraulic support |
| 05/15/2013 | CN103104274A Front top beam multi-step-pitch filling hydraulic support |
| 05/15/2013 | CN103104273A Rear top beam multi-step distance filling hydraulic support |
| 05/15/2013 | CN102220874B Machine-mounted tunneling working surface head-on temporary support device |
| 05/08/2013 | CN202926364U Hydraulic support loading device |
| 05/08/2013 | CN202926363U Coal leakage-proof device between fully mechanized mining hydraulic supports |
| 05/08/2013 | CN202926362U Running bracket of tunneling roof |
| 05/08/2013 | CN202926361U Filling gangue hydraulic support pull backward motion device |
| 05/08/2013 | CN202926360U Rigidity adjustable rock-blocking device of large-dip-angle working face support |
| 05/08/2013 | CN202926359U Protective device |
| 05/08/2013 | CN202926326U Complete equipment for automatic working surface of low coal seam shearer-loader |
| 05/08/2013 | CN103089286A Driving face self-moving temporary support hydraulic support and support method thereof |
| 05/08/2013 | CN103089285A Pushing plate connecting head of combined mining support |
| 05/08/2013 | CN101952547B Method for automatically creating a defined face opening in longwall coal mining operations |
| 05/01/2013 | CN202914118U Lifting seat hydraulic support |
| 05/01/2013 | CN202914117U Movable supporting and protecting support of roadway heading machine |
| 05/01/2013 | CN202914116U Hydraulic support of preventing coal wall from spalling and roof falling in front of support |
| 05/01/2013 | CN202914115U Large dip angle lapping hydraulic support frame |
| 05/01/2013 | CN202914114U Novel hydraulic support side guard plate locking mechanism |
| 05/01/2013 | CN202914113U Protective net device of hydraulic support frame |
| 05/01/2013 | CN202914112U Telescopic protective mesh for hydraulic support |
| 05/01/2013 | CN103075171A Thrust mechanism and hydraulic bracket comprising thrust mechanism |
| 05/01/2013 | CN103075155A Steeply inclined coal seam fully-mechanized mining method and supporting facilities |
| 05/01/2013 | CN101967990B Hydraulic support with excavating function |
| 04/24/2013 | CN202900300U Support removing device |
| 04/24/2013 | CN202900299U Hydraulic support |
| 04/24/2013 | CN103061799A Passing through device and hydraulic support group with passing through device |
| 04/24/2013 | CN103061793A Wireless remote control device with withdrawal support |
| 04/24/2013 | CN103061792A Hydraulic support for coal mine vehicle |
| 04/24/2013 | CN102155222B Device and control method for automatically aligning scraper conveyor body for fully-mechanized surface |
| 04/24/2013 | CN102042023B Hydraulic support with filling and leakage-preventing function |
| 04/24/2013 | CN101832102B Movable two-platform partitioned four-arm hanging wall anchor rod and anchor cable construction drill carriage |
| 04/17/2013 | CN202883003U Coal mine tunnel gangue transshipment and supporting all-in-one machine |
| 04/17/2013 | CN202882974U Hydraulic support pushing and moving mechanism capable of achieving double-complete-set |
| 04/17/2013 | CN202882973U Hydraulic support and push-and-move rod thereof |
| 04/17/2013 | CN202882972U Along-groove stepping split type advanced hydraulic support frame group |
| 04/17/2013 | CN202882971U Hinge type push rod |
| 04/17/2013 | CN202882970U Hydraulic support stand column protective device |
| 04/17/2013 | CN202882969U Hydraulic support waste rock blocking device for mine |
| 04/17/2013 | CN202882926U Coal mining unit and remote controller thereof |
| 04/17/2013 | CN103046944A Hydraulic support |
| 04/17/2013 | CN103046943A Hydraulic bracket |
| 04/17/2013 | CN103046942A Hydraulic support |
| 04/10/2013 | CN202866852U Hydraulic support top tray provided with laterally movable support |
| 04/10/2013 | CN202866851U Thin coal seam shield-type support |
| 04/10/2013 | CN202866850U Shield-type support with base capable of horizontally swinging and being adjusted |
| 04/10/2013 | CN202866849U Medium-thickness coal seam shielding-type support with small four-connection-rod guarding device |
| 04/10/2013 | CN202866848U Top coal caving support capable of preventing extensible beam from offsetting |
| 04/10/2013 | CN202866847U Top coal caving hydraulic support with back pulling sliding drag chain convenient to adjust |
| 04/10/2013 | CN202866846U Support and shield type support frame with coal blocking plate |
| 04/10/2013 | CN202866808U Connecting device for mining equipment |
| 04/10/2013 | CN103038449A Control device for an extracting unit in the work face of a mine |
| 04/10/2013 | CN103032091A Self-moving hydraulic support |
| 04/10/2013 | CN103032090A Hydraulic control directional control valve |
| 04/10/2013 | CN103032089A Triangular area hydraulic support top protection device on upper end of large-inclination-angle working surface |
| 04/10/2013 | CN102094665B Auxiliary support method for additional load during approaching construction of porous tunnel by shield method |
| 04/04/2013 | WO2011153985A3 Control device for an extracting unit in the work face of a mine |
| 04/03/2013 | CN202851039U Hydraulic support bottom adjusting mechanism of fully mechanized coal mining face |
| 04/03/2013 | CN202851038U Column disassembling device of hydraulic support upright column |
| 04/03/2013 | CN202851037U Sublevel caving coal support pull back chute mechanism |
| 04/03/2013 | CN202851036U Compact hydraulic support controller |
| 04/03/2013 | CN202851035U Bottom lifting mechanism of forepoling support |
| 04/03/2013 | CN202851034U Combined hydraulic self-transfer support |
| 04/03/2013 | CN202851033U Bag-type filling hydraulic support in |
| 04/03/2013 | CN202851032U Sealing rubber board for filling type hydraulic pressure support |
| 04/03/2013 | CN202851020U Reversing valve for coal mine hydraulic support |
| 04/03/2013 | CN103016040A Hydraulic bracket control device with personal safety protection function and control method thereof |
| 04/03/2013 | CN103016039A Tunneling working surface comprehensive hydraulic support |
| 04/03/2013 | CN103016038A Method for coal extracting and gangue filling |
| 04/03/2013 | CN102322281B Tunnel quick-tunneling advance support integrated device |
| 04/03/2013 | CN102182487B 流体充填液压支架 Hydraulic fluid filling bracket |
| 04/03/2013 | CN102094664B Hydraulic bracket for end of comprehensive mechanized filling coal face |
| 03/27/2013 | CN202832607U Hydraulic support controller |
| 03/27/2013 | CN202832606U Lift truck special for gateway racks |
| 03/27/2013 | CN202832605U Corner buried pipe self-moving system in fully mechanized coal mining face |
| 03/27/2013 | CN202832604U End hydraulic support |
| 03/27/2013 | CN202832603U Novel medium-flux hydraulic control one-way valve |
| 03/27/2013 | CN202832602U Hydraulic support joist device |
| 03/27/2013 | CN202832601U Shield type hydraulic support frame connection piece |
| 03/27/2013 | CN202832600U Large-spaced ultra-thin coal seam hydraulic support |
| 03/27/2013 | CN202832599U Termination point hydraulic pressure bracket |