| 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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| 01/08/2014 | CN203383843U Thin coal seam filling and coal mining bracket |
| 01/08/2014 | CN203383842U Three-column-type paste-filling hydraulic support used for underground thin coal seam |
| 01/08/2014 | CN203383820U Unmanned automatic mining system of working face of coal plough |
| 01/08/2014 | CN101952548B Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations |
| 01/01/2014 | CN203374296U Locking device of operating valve handles of hydraulic support |
| 01/01/2014 | CN203374295U Locking device of operating handles of hydraulic support |
| 01/01/2014 | CN203374294U Safety walking ladder of large dip angle hydraulic support |
| 01/01/2014 | CN203374293U Device for preventing coal wall caving of working face from causing personal injury |
| 01/01/2014 | CN203374290U Device for draining liquid out of mine hydraulic support |
| 01/01/2014 | CN103485813A Raking device of coal mining shielding support |
| 01/01/2014 | CN103485812A Pre-supporting mechanism and tunneling machine |
| 12/25/2013 | CN203362205U Variation movable pulley mechanism capable of using small stroke for realizing long travel distance |
| 12/25/2013 | CN203362204U Internal frame and external frame traveling mechanism |
| 12/25/2013 | CN203362203U Economical controller of hydraulic support electrohydraulic control system |
| 12/25/2013 | CN203362202U Hydraulic support electro-hydraulic control system |
| 12/25/2013 | CN203362201U Thin seam coal hydraulic support electro-hydraulic control system controller |
| 12/25/2013 | CN203362200U Novel thin-bed mining hydraulic support |
| 12/25/2013 | CN203362199U End-head hydraulic support for fully mechanized mining face |
| 12/25/2013 | CN203362198U Track walking type immediate support device of fully-mechanized drivage roadway |
| 12/25/2013 | CN203362197U Excavation face hydraulic support parallel operation device |
| 12/25/2013 | CN203362166U Supporting work platform for heading roadway |
| 12/25/2013 | CN103470292A Coal roadway rapid excavation temporary supporting system and supporting method applying same |
| 12/25/2013 | CN103470291A Method for support connection of machine tail on large-dip-angle working face |
| 12/25/2013 | CN103470282A Integrally-inserted conical sealing reversal valve |
| 12/25/2013 | CN102493839B Method for filling gob |
| 12/25/2013 | CN102418541B Method, device and system for automatically moving hydraulic supports for coal plough |
| 12/25/2013 | CN102031986B Method for controlling advancing mechanism |
| 12/18/2013 | CN203347837U Passing beam, passing apparatus and coal mining system |
| 12/18/2013 | CN203347821U Limiting device of hydraulic support balance mechanism |
| 12/18/2013 | CN203347820U Hydraulic system for testing hydraulic support balance mechanism |
| 12/18/2013 | CN203347819U Hydraulic cushion lifting mechanism for narrow space |
| 12/18/2013 | CN203347818U Hydraulic support in-position machine |
| 12/18/2013 | CN203347817U Middle flow balance reversible lock |
| 12/18/2013 | CN203347816U Hydraulic support recoil lotion recovering and filtering device |
| 12/18/2013 | CN203347815U Testing apparatus of hydraulic support balance mechanism |
| 12/18/2013 | CN203347811U Inserted mass flow balance reversible lock |
| 12/18/2013 | CN103459772A Face equipment with a hydrostatic tube balance installed thereon and intended for determining the height position of individual elements of the face equipment |
| 12/18/2013 | CN103452574A Auxiliary bracket moving device of circular self-moving advance support |
| 12/18/2013 | CN103452573A Self movable forepoling support with caterpillar band top beam |
| 12/18/2013 | CN102434182B Filling hydraulic bracket with automatic bag overturning mechanism |
| 12/11/2013 | CN203335110U Compound seal safety valve with rated flow being 320L/min |
| 12/11/2013 | CN203335109U Combined seal safety valve with rated flow of 1000L/min |
| 12/11/2013 | CN203335108U Combined support used for coal mine supporting |
| 12/11/2013 | CN203335107U Large-dip-angle coal bed coal gangue automatic blocking door |
| 12/11/2013 | CN203335075U Fully-mechanized-mining planning and transporting machine set |
| 12/11/2013 | CN203335073U Fully-mechanized-mining coal drilling unit and fully-mechanized-mining coal drilling machine |
| 12/11/2013 | CN103437798A Device for installing and removing fully mechanized mining supporter |
| 12/11/2013 | CN103437797A Combined type hydraulic support provided with notch excavation device |
| 12/11/2013 | CN103437794A Hydraulic steering platform |
| 12/05/2013 | DE102007047761B4 Ventilanordnung und Ausbaugestell Valve assembly and support frame |
| 12/04/2013 | CN203321562U Bracket for supporting and protecting |
| 12/04/2013 | CN203321561U Gob-side entry retaining hydraulic support with top net paved on support tail |
| 12/04/2013 | CN203321560U Split two-purpose whole top sliding hydraulic support |
| 12/04/2013 | CN203321559U Forepoling supporting device for steep soft coal seam roadway tunneling |
| 12/04/2013 | CN203321549U Hydraulic cylinder control valve without unloading impact resonance |
| 12/04/2013 | CN103422874A Stepping type support device |
| 12/04/2013 | CN103422860A Unmanned automatic working face exploitation system of coal plough |
| 12/04/2013 | CN102587951B Hydraulic U-type steel bracket supporting machine |
| 11/27/2013 | CN203308510U Tamping mechanism for hydraulic support and hydraulic support |
| 11/27/2013 | CN203308490U High-flow balancing two-way lock |
| 11/27/2013 | CN203308489U Overall shed-lifting supporting frame for high-stress cracked surrounding rock roadway crossover point |
| 11/27/2013 | CN203308488U Coal-blocking type blasting working surface hydraulic support |
| 11/27/2013 | CN203308480U Cartridge-type medium-flow balance two-way lock |
| 11/27/2013 | CN203308479U Integral plug-in mounting type valve element assembly for hand-directional valve |
| 11/27/2013 | CN103410548A Hydraulic support and water spraying valve thereof |
| 11/27/2013 | CN103410547A Thin seam hydraulic support for coal mines |
| 11/27/2013 | CN103410546A Crotch type base of hydraulic support for coal mines |
| 11/27/2013 | CN103410545A Hydraulic support capable of realizing top coal caving and filling operation |
| 11/27/2013 | CN103410539A Coal mine fully-mechanized mining hydraulic support withdrawing mechanical hand |
| 11/27/2013 | CN103410537A Safety valve |
| 11/27/2013 | CN102383815B Suspension type driftage temporary supporting device and use method thereof |
| 11/27/2013 | CN101514713B Valve device |
| 11/26/2013 | US8590982 Longwall mining roof supports |
| 11/20/2013 | CN203296795U Safety valve with liquid returning function for hydraulic support |
| 11/20/2013 | CN203296788U Hydraulic support retreating manipulator for comprehensive excavation of coal mine |
| 11/20/2013 | CN203296785U Differential combination valve for coal mine hydraulic support |
| 11/20/2013 | CN103397895A Pseudo oblique coal face hydraulic support |
| 11/20/2013 | CN103397886A Excavation roadway supporting working platform |
| 11/20/2013 | CN101970797B An apparatus for forming an underground tunnel |
| 11/13/2013 | CN203285470U Hydraulic support suitable for steep-grade coal seam mining |
| 11/13/2013 | CN203285469U Thrusting mechanism for planing and transporting set |
| 11/13/2013 | CN203285468U Beam dismounting device for hydraulic support of coal mine tunnel |
| 11/13/2013 | CN203285467U Mine hydraulic support bottom lifting device |
| 11/13/2013 | CN203285466U Support gravity center supporting device |
| 11/13/2013 | CN203285465U Flexible gangue baffling device |
| 11/13/2013 | CN203285464U Development cover support under coal mine |
| 11/13/2013 | CN102562066B Method for mechanically mining coal by using steep seam pseudo inclination bracing type retractable flexible shield support |
| 11/06/2013 | EP2659092A1 Face equipment with a hydrostatic tube balance installed thereon and intended for determining the height position of individual elements of the face equipment |
| 11/06/2013 | CN203271793U Machinery tunnel advance supporting supports with major-cycle movement assisted by transport machines |
| 11/06/2013 | CN203271792U Detecting tool for repairing hinged hole |
| 11/06/2013 | CN203271791U Integrally-placed hydraulic support |
| 11/06/2013 | CN203271790U Fully-mechanized excavating staggered type forepoling device |
| 11/06/2013 | CN203271789U Inter-support gangue blocking device for combined mining working surface of coal mine |
| 11/06/2013 | CN203271781U Hydraulic liquid returning disconnection valve |
| 11/06/2013 | CN203269458U Cylinder opening structure of bottom-lifting jack |
| 11/06/2013 | CN103382849A Method for filling paste behind filling hydraulic supports |
| 11/06/2013 | CN102619543B Mobile type hydraulic airtight filling device |
| 11/06/2013 | CN102392640B Close-range thin coal layer simultaneous mining and parallel transporting method |
| 11/06/2013 | CN102257243B Method for adjusting an automatic level control of the plane in planing operations in hard coal mining |
| 11/06/2013 | CN102235173B Locking device of hydraulic bracket side guard plate |