| 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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| 11/06/2013 | CN102226409B Stepped-type support of top paving mesh laneway blast advancement face |
| 10/31/2013 | WO2013159448A1 Self-moving tunnel support canopy |
| 10/30/2013 | CN203257446U Coal harbor arched supporting shield structure |
| 10/30/2013 | CN203257445U Roadway drilling and blasting excavation track-moving type temporary support system |
| 10/29/2013 | US8567869 Shield control device for carrying out the longwall function of a longwall unit in the longwall face working in a mine |
| 10/23/2013 | CN203248180U Hydraulic support with caving shield hinged with middle part of top beam |
| 10/23/2013 | CN103362527A Moving device for speedy drivage and moving method thereof |
| 10/23/2013 | CN102296977B Underground support unloading device |
| 10/22/2013 | US8562077 Method of setting an automatic level control of the plow in plowing operations of coal mining |
| 10/16/2013 | CN203239375U Low sublevel caving coal support |
| 10/16/2013 | CN203239374U Carrier roller limiting device based on large-mining-height hydraulic support assembling and disassembling machine |
| 10/16/2013 | CN203239373U Multifunctional operation trolley for tunnel construction |
| 10/16/2013 | CN203239364U Overall plug-in type manual reversing valve |
| 10/16/2013 | CN103352714A Roof brushed frame moving valve of hydraulic support for coal mine |
| 10/16/2013 | CN103352713A Artificial intelligent type hydraulic support electric-hydraulic control system |
| 10/16/2013 | CN103352712A Locking device for operating handle of fully mechanized mining machine |
| 10/16/2013 | CN102128042B Hydraulic support electronic control system |
| 10/10/2013 | WO2013149648A1 Face equipment comprising hose levels placed between the face conveyor and the shield support frames |
| 10/10/2013 | WO2013149638A1 Face equipment comprising hose levels placed on the shield support frames of said face equipment |
| 10/09/2013 | CN203230452U End support for thin seam double-unit face central transportation roadway |
| 10/09/2013 | CN203230451U Hydraulic support for mining working surface roadway |
| 10/09/2013 | CN203230450U Waste rock barrier device of coal mine suspension support |
| 10/09/2013 | CN203230449U Hydraulic support for soft rock working surface |
| 10/09/2013 | CN203230448U Matched large-power complete equipment for 1.15m coal seam combined mining |
| 10/02/2013 | CN203223239U Roadway advance timbering support used for assisting machine to move |
| 10/02/2013 | CN203223238U Mechanical arm for moving racks in roadway |
| 10/02/2013 | CN103334776A Integral plug-in valve core assembly for hand-operated direction valve |
| 09/26/2013 | DE102010055544B4 Systemeinheit zum Betrieb eines untertägigen hydraulischen Schreitausbaus System unit for operating an underground hydraulic powered roof |
| 09/25/2013 | CN203214090U Hydraulic support positioning machine |
| 09/25/2013 | CN203214089U Novel self-walking framework |
| 09/25/2013 | CN203214088U Hydraulic support |
| 09/25/2013 | CN203214087U Hydraulic support |
| 09/25/2013 | CN203214086U Hydraulic support |
| 09/25/2013 | CN203214085U Hydraulic support |
| 09/25/2013 | CN203214084U Hydraulic support operating valve set position adjusting device and hydraulic support |
| 09/25/2013 | CN203214083U Protective device between hydraulic supports in ultra-thin coal seam |
| 09/25/2013 | CN103321666A Hydraulic cushion lifting mechanism used in narrow and small space |
| 09/25/2013 | CN103321665A Support controller for electrohydraulic control system |
| 09/25/2013 | CN103321662A Integrated lifting mechanism of hydraulic cylinder of rotary table |
| 09/25/2013 | CN103321661A Integral plug-in type hand-operated direction valve |
| 09/25/2013 | CN102454410B Timbering equipment for coal mines |
| 09/25/2013 | CN102116165B Hydraulic support control device of coal mine and distributed control system thereof |
| 09/18/2013 | CN203201578U Large-dip-angle thin coal seam hydraulic support |
| 09/18/2013 | CN103306700A Control method of unattended operation for coal mine comprehensive mechanized mining face |
| 09/18/2013 | CN103306699A Inner and outer rack traveling crane mechanism |
| 09/18/2013 | CN103306698A In-position machine for hydraulic support |
| 09/18/2013 | CN103306697A Three-column paste body filling hydraulic bracket for underground thin coal seam and four-step paste body filling process |
| 09/18/2013 | CN103306696A Self-moving roadway advance support bracket |
| 09/12/2013 | WO2013131318A1 Two-prop shield hydraulic support for large centre to centre distance and ultra-high working resistance in medium-thickness coal seams |
| 09/11/2013 | CN203189050U Mining large flow hydraulic control one-way valve |
| 09/11/2013 | CN103291343A Insertion type hydraulic control one-way valve for suspended support |
| 09/11/2013 | CN103291342A Pipeline system capable of achieving hydraulic support long-distance liquid supply |
| 09/11/2013 | CN103291341A Cartridge middle-flow balance bidirectional lock |
| 09/11/2013 | CN103291340A Large-flow balance bidirectional lock |
| 09/11/2013 | CN103291339A Medium flow balancing two-way lock |
| 09/11/2013 | CN103291338A Hydraulic support electrohydraulic control system |
| 09/11/2013 | CN103291336A Cartridge large-flow balance bidirectional lock |
| 09/11/2013 | CN103291335A Balanced floating bidirectional lock |
| 09/11/2013 | CN103291293A Fully-mechanized coal mining planing and transporting unit |
| 09/11/2013 | CN102493826B Isolating coupler |
| 09/11/2013 | CN102305093B Transitional hydraulic bracket for gob-side entry retaining |
| 09/04/2013 | CN203175591U Hydraulic support steering platform |
| 09/04/2013 | CN203175590U Safety valve used for coal mine hydraulic support |
| 09/04/2013 | CN203175589U Safety valve used for coal mine hydraulic support |
| 09/04/2013 | CN203175588U Device capable of preventing clamping of telescopic beam of fully-mechanized hydraulic support |
| 09/04/2013 | CN203175583U Plug-in type double faced lock for balancing jack |
| 09/04/2013 | CN103277127A Ultrathin seam hydraulic support |
| 09/04/2013 | CN103277126A Combined support for coal mine supporting |
| 09/04/2013 | CN103277107A Shield type roadway heading machine |
| 09/04/2013 | CN102312455B Intelligent crushing load tunnel repair machine |
| 09/04/2013 | CN102261258B Suspension support mounting rack |
| 08/28/2013 | CN203161271U Thin coal seam pushing mechanism |
| 08/28/2013 | CN203161270U Hydraulic support pushing and moving rod |
| 08/28/2013 | CN203161269U Pre-supporting device |
| 08/28/2013 | CN203159123U Advancing jack for hydraulic support |
| 08/28/2013 | CN103266905A Ploughing and conveying machine set thrust mechanism |
| 08/22/2013 | DE102013001581A1 Hydraulische Schaltung für den Strebausbau Hydraulic circuit for the longwall |
| 08/21/2013 | CN203145983U Wongawilli support set |
| 08/21/2013 | CN203145982U Hydraulic system of hydraulic support guarding mechanism |
| 08/21/2013 | CN203145981U Integral top beam statically indeterminate hydraulic support |
| 08/21/2013 | CN203145980U Mining shed lifting support |
| 08/21/2013 | CN203145979U Tunnel forepoling hydraulic bracket |
| 08/21/2013 | CN103256064A Top coal caving hydraulic support intelligent control coal caving method |
| 08/21/2013 | CN103256063A Device for preventing jamming of telescopic girder of fully-mechanized mining hydraulic support |
| 08/21/2013 | CN103256049A Coal drilling unit for comprehensive mechanized coal mining |
| 08/21/2013 | CN103256048A Mining method of coal drilling unit for comprehensive mechanized coal mining |
| 08/14/2013 | CN203130134U Differential pressure combination valve for displacement |
| 08/14/2013 | CN203130133U Rolling frame moving device of hydraulic support |
| 08/14/2013 | CN203130132U Top beam of end support assembly comprising double supports |
| 08/14/2013 | CN203130131U Suspension hydraulic support for underground coal mine large channel end |
| 08/14/2013 | CN203130130U Gangue blocking device for footway of steeply-inclined working face |
| 08/14/2013 | CN203123932U Emulsified liquid supply system for underground coal mine |
| 08/14/2013 | CN103244164A Hydraulic support group with video control system |
| 08/14/2013 | CN103244163A Working surface hydraulic support with array proximity sensing devices and linearity control method of hydraulic support |
| 08/14/2013 | CN103244155A Hydraulic cylinder control valve without unloading impact resonance |
| 08/14/2013 | CN103244120A Dynamic speed control system of coal mining machine for coal mine high-gas fully mechanized coal mining face |
| 08/07/2013 | CN203114338U Supporting equipment for filling |
| 08/07/2013 | CN203114321U Hydraulic support bottom lifting device for mine |
| 08/07/2013 | CN203114320U Hydraulic support pushing mechanism |
| 08/07/2013 | CN203114319U Rope anti-disengaging device based on large mining height hydraulic support separate-installed machine |