| 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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| 10/03/2012 | CN102704927A Comprehensive mechanization stone drift heading machine set |
| 10/03/2012 | CN102094647B Safe and efficient fully-mechanized mining method for thin coal seam under two hard conditions |
| 10/03/2012 | CN102086772B Hydraulic support and bottom lifting device thereof |
| 10/03/2012 | CN102042025B Pushing regulating mechanism |
| 10/03/2012 | CN101975072B Recovery method of common combined mining working face hydraulic support |
| 10/03/2012 | CN101906985B Method for remotely monitoring and controlling hydraulic support on underground working surface |
| 09/26/2012 | CN202451195U Multi-supporting-point well type temporary support for coal mine underground tunnel excavation |
| 09/26/2012 | CN202451194U Self-coal-dropping type hydraulic support |
| 09/26/2012 | CN202451193U Clamp type support for ski-jump chassis |
| 09/26/2012 | CN202451192U Hydraulic waste edge support for thin coal layer blasting |
| 09/26/2012 | CN202451191U Fixing structure for nets used in end mining in fully-mechanized mining face |
| 09/19/2012 | CN202441408U Rapid installing device of suspended bracket |
| 09/19/2012 | CN202441407U Top coal physical breaking window device of hydraulic top coal caving support |
| 09/19/2012 | CN202441406U Side guard for large-inclination hydraulic bracket |
| 09/19/2012 | CN202441405U Side protective plate locking device of hydraulic bracket and hydraulic bracket |
| 09/19/2012 | CN102678155A Crawler-type retracement machine for hydraulic bracket |
| 09/19/2012 | CN102678154A Following end support |
| 09/19/2012 | CN102678153A Self-moving follow-up end support |
| 09/19/2012 | CN102678152A Fixing mechanism for hydraulic support lateral thruster and hydraulic support |
| 09/19/2012 | CN102678151A Fully-mechanized excavating self-moving type temporary support system and technological method thereof |
| 09/19/2012 | CN102678150A Direct-feeding type buffering and waste rock stopping device for filling coal mining |
| 09/13/2012 | US20120230775 Shield canopy for a shield-type support |
| 09/12/2012 | CN202431290U Hydraulic bracket control device with wireless remote control function |
| 09/12/2012 | CN202431289U Tubular connection large flow one-way valve |
| 09/12/2012 | CN202431288U Hydraulic bracket and base bridge structure thereof |
| 09/12/2012 | CN102661162A Coalface straightness control method |
| 09/12/2012 | CN102661161A Addressing system for controller of hydraulic support for mine, and its addressing method |
| 09/12/2012 | CN102661160A Two-pillar hidden type filled hydraulic support |
| 09/12/2012 | CN102661159A Base lifting mechanism and hydraulic support provided with the same |
| 09/07/2012 | WO2011064690A3 Shield canopy for a shield-type support |
| 09/05/2012 | CN202417561U Supports |
| 09/05/2012 | CN202417560U Device for preventing support crosshead from overturning |
| 09/05/2012 | CN202417559U Position monitoring device for coal mining machine |
| 09/05/2012 | CN202417558U Beam supporter and tunneling machine |
| 09/05/2012 | CN202417539U Hand reversing main control valve for thin seam hydraulic support |
| 09/05/2012 | CN102654060A Tunnel excavation staggered type supporting device |
| 09/05/2012 | CN102031985B Walking support |
| 09/05/2012 | CN102003192B Connecting locating device |
| 09/05/2012 | CN101482025B Light hydraulic support |
| 08/30/2012 | DE102011012655A1 System unit for operating underground hydraulic powered roof, has remote controller which performs control task of control device over manual input at controller, and control device and controller are communicated by wireless communication |
| 08/29/2012 | CN202402075U Goaf filling ramming device |
| 08/29/2012 | CN202402057U Economic and practical hydraulic support controller |
| 08/29/2012 | CN202402056U Human-computer interface control terminal for hydraulic support controller |
| 08/29/2012 | CN202402055U Hydraulic support with bottom lifting device |
| 08/29/2012 | CN202402054U Caving power support |
| 08/29/2012 | CN202402053U End support |
| 08/29/2012 | CN202402052U Shielding hydraulic support |
| 08/23/2012 | DE102008009722B4 Ventilanordnung Valve assembly |
| 08/22/2012 | CN202391445U Hydraulic filling bracket with automatic bag turning mechanism |
| 08/22/2012 | CN202391444U Beam type retracting device of hydraulic bracket of fully-mechanized coal face |
| 08/22/2012 | CN202391443U Pushing and tamping device specially for end filling hydraulic support |
| 08/22/2012 | CN202391442U Two-column shield type hydraulic support for filling and mining |
| 08/22/2012 | CN202391427U Temporary support and top plate and bottom plate supporting device of rock-roadway tunneling machine |
| 08/22/2012 | CN102011603B Coal mine underground remote control triangle protective shield |
| 08/15/2012 | CN202381111U Four-post-supported double pendulum rod hydraulic support |
| 08/15/2012 | CN102635383A Realization method of scramming and locking function of inter-frame controller of hydraulic bracket |
| 08/15/2012 | CN102635382A Coal mine suspension support adjusting tool |
| 08/15/2012 | CN102635381A Method for measuring content of gangue in coal refuse mixture based on natural ray |
| 08/15/2012 | CN102635380A Anti-injury device for electro-hydraulic control hydraulic bracket |
| 08/15/2012 | CN102635379A Online program updating method for hydraulic support controllers |
| 08/14/2012 | US8240773 Method and apparatus for monitoring gateroad structural change |
| 08/08/2012 | EP2483524A2 Advancing assembly and powered shield support herewith |
| 08/08/2012 | CN202370562U Solid waste filling coal mining hydraulic support frame |
| 08/08/2012 | CN202370561U Sublevel caving coal hydraulic support frame tail beam |
| 08/08/2012 | CN202370560U Fully automatic cutter dicing unattended operation coal mining device |
| 08/08/2012 | CN202370550U Shock-free insertion type liquid control one-way valve |
| 08/08/2012 | CN202370518U Pickaback temporary support device applied to low coal mine laneway |
| 08/08/2012 | CN102628369A Full-automatic electro-hydraulic control system for hydraulic support |
| 08/08/2012 | CN102628368A Tunnel self-advancing support shed |
| 08/08/2012 | CN102628362A Automatic working face complete equipment for thin seam drum shearer |
| 08/08/2012 | CN102102525B Hydraulic support and pedal plate device thereof |
| 08/02/2012 | WO2011121500A3 Method for locating persons and/or mobile machines in mine caverns using rfid technology, and longwall face extraction installation for carrying out the method |
| 08/01/2012 | CN202360123U Advance beam shed feeding device for mechanized tunneling roadway |
| 08/01/2012 | CN202360122U Small-stage sublevel caving coal bracket |
| 08/01/2012 | CN202360110U Floating hydraulic bidirectional lock |
| 08/01/2012 | CN102619544A Self-rotating carrying frame in-place machine |
| 08/01/2012 | CN102619543A Mobile type hydraulic airtight filling device |
| 08/01/2012 | CN102619542A Lateral wall supporting device and supporting bracket with same |
| 08/01/2012 | CN102619541A Virtual three-dimensional (3D) linkage display dispatching system for coal mining face |
| 08/01/2012 | CN102619540A Hydraulic support placing machine turntable device |
| 07/25/2012 | CN202348308U Advanced-supporting type crawler-type hydraulic support used for fully mechanized working face |
| 07/25/2012 | CN202348307U Wireless remote control device of electro-hydraulic control system of hydraulic support |
| 07/25/2012 | CN202348306U Hydraulic support electrohydraulic control system for fully-mechanized coal face |
| 07/25/2012 | CN202348305U Wired man-machine interface device of support controller |
| 07/25/2012 | CN202348304U Economic and practical hydraulic support controller casing |
| 07/25/2012 | CN202348303U Machine-carried full hydraulic beam supporting equipment |
| 07/25/2012 | CN102606207A Mine gob filling and entry retaining device system and filling method |
| 07/25/2012 | CN102606183A Portable mining hydraulic support controller and control method thereof |
| 07/25/2012 | CN102606182A hydraulic support used for underground coal mine with thin seam |
| 07/25/2012 | CN102606158A Novel low coal seam coal mine underground mining complete equipment |
| 07/25/2012 | CN102269000B Front frame of integral paste filling and supporting hydraulic bracket |
| 07/25/2012 | CN101929348B Coal removal device of crawler walking hydraulic support |
| 07/25/2012 | CN101892856B Special hydraulic support for underground filling coal mining of coal mine |
| 07/25/2012 | CN101769159B Flexible shield-type hydraulic support for coal mine |
| 07/18/2012 | CN102587977A Four-column and double-swing-beam type gangue filling hydraulic support |
| 07/18/2012 | CN102587976A Suspension type gangue filling mechanism |
| 07/18/2012 | CN102587975A Containing gangue filling and tamping swing beam |
| 07/18/2012 | CN102587952A High-adaptability inserting plate type end support |
| 07/18/2012 | CN102587951A Hydraulic U-type steel bracket supporting machine |
| 07/18/2012 | CN102587950A Double-buffering type pushing check valve |