| 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) |
|---|
| 10/15/2008 | CN201133256Y Integral top beam cantilever support |
| 10/15/2008 | CN101285393A Low coal seam support device |
| 10/08/2008 | CN201129185Y Anchor ear used for coal face hydraulic support |
| 10/02/2008 | DE19827090B4 Hydraulisches Ventil Hydraulic valve |
| 10/01/2008 | CN201125745Y Hydraulic operated valve |
| 10/01/2008 | CN201125744Y Slipping hydraulic chock-shield support |
| 10/01/2008 | CN201125743Y Sloped and high-sloped fully-mechanized mining hydraulic support side direction blocking apparatus |
| 10/01/2008 | CN201125739Y Hydraulic safety valve |
| 09/30/2008 | US7428861 Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 09/25/2008 | DE102007012678B3 Controlling bracing operations in underground coal mining involves deriving convergence profile from sensor measurements and increasing amount cut at coal face if desired convergence threshold exceeded |
| 09/24/2008 | CN201121525Y Single-bottom multi-beam hydraulic support |
| 09/24/2008 | CN201121524Y Light hydraulic support |
| 09/24/2008 | CN201121523Y Hydraulic support |
| 09/17/2008 | CN101265808A Coal mine conjuncted asynchronous bracket filled block wall |
| 09/16/2008 | US7424803 Method and device for pressure amplification in cylinders, in particular hydraulic rams |
| 09/10/2008 | CN101260810A Hydraulic support tail beam |
| 09/03/2008 | CN201110184Y Hydraulic support for high oblique coal seam end head |
| 08/27/2008 | CN101251022A Immediate support device for digging machine |
| 08/26/2008 | US7416369 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 08/20/2008 | CN201103401Y Electric-hydraulic control device |
| 08/20/2008 | CN201103400Y Alternative mobile hydraulic support with anti-burst rock-blocking device |
| 08/20/2008 | CN201103399Y Suspension hydraulic support with front and rear drag beam |
| 08/20/2008 | CN201103398Y Down-hole tunnel suspension type self-walking advance timbering |
| 08/20/2008 | CN101245709A Hydraulic prop frame for low position blasting down the roof coal |
| 08/20/2008 | CN101245708A Magnetic rheologic pilot-operated reversing valve for hydraulic support |
| 08/13/2008 | CN201100128Y Integrated digger |
| 08/13/2008 | CN101240712A Hydraulic support electrohydraulic control method |
| 08/13/2008 | CN101240711A Hydraulic support electrohydraulic control system |
| 08/13/2008 | CN101240710A Support moving device |
| 08/13/2008 | CN101240709A Forward slip type hydraulic support |
| 08/13/2008 | CN101240708A Hydraulic support electrohydraulic control system main control valve |
| 08/06/2008 | CN101235722A Floating bidirectional lock under pressure and protection type hydraulic support control system |
| 07/24/2008 | WO2008086947A1 Shield-type support frame for the mining industry and guide rod and horizontal runner thereof |
| 07/23/2008 | CN201090231Y Supporting association hydraulic support for coal face |
| 07/23/2008 | CN201090230Y Fission top beam flexible support |
| 07/23/2008 | CN201090229Y Engine-carried type supporting machine |
| 07/23/2008 | CN100404789C Suspending movable hydraulic support rack for advanced support in coal cutting roadway |
| 07/09/2008 | CN201083130Y Coal mining development machine carried advance support device |
| 07/03/2008 | DE102007060171A1 Coal face support, has multiple timbering and walling units and has mining machine and control unit has data detection, data storage, computer and programming |
| 07/03/2008 | DE102007060170A1 Coal mining device for use at long wall face of mine, has radio receiver connected with long wall face control device, where actual measured values are applied as value for alignment with feed rate and are made visible on screen |
| 07/02/2008 | CN201080829Y Combination type cantilever support |
| 07/02/2008 | CN201080828Y Large flow liquid-control one-way valve |
| 07/02/2008 | CN100398781C Tunnel rupture type excavating method and excavating units |
| 06/25/2008 | CN101205811A Hydraulic bracket electrohydraulic control system as well as valve control device and control method thereof |
| 06/19/2008 | DE19857890B4 Ventilanordnung Valve assembly |
| 06/18/2008 | CN101199963A Surface treatment method of hydraulic support |
| 06/12/2008 | DE202006020348U1 Druckbegrenzungsventil mit indirekter Dämpfung Pressure relief valve with indirect damping |
| 06/12/2008 | DE102006057601A1 Mining prop position system, at high pressure, has a bypass non-return valve at the piston to block a flow towards the entry into the cylinder |
| 06/11/2008 | CN201071730Y Three level compound side protection mechanism |
| 06/11/2008 | CN201071729Y Four-beam parallel combination sliding upper beam hydraulic support |
| 06/11/2008 | CN201071728Y Combined sliding upper beam hydraulic support and upper beam connecting mechanism |
| 06/11/2008 | CN101196120A Hydraulic support cap |
| 06/11/2008 | CN101196119A Hydraulic support cap |
| 06/04/2008 | CN201068804Y Electric fluid controlled thin coal layer covering type hydraulic support |
| 06/04/2008 | CN201068798Y Down-hole coal mining equipment |
| 06/04/2008 | CN101191419A Fully mechanized working faces track along end head bracket |
| 05/29/2008 | DE19953526B4 Ausbaugestell für große Flözmächtigkeiten mit einer gesteuerten Spaltabdichtung Support frame for large seam applications with a controlled gap seal |
| 05/28/2008 | CN201065765Y Full-mechanized hydraulic support backplate bidirectional lock |
| 05/27/2008 | US7377727 Mining roof support cylinder corrosion protection apparatus and method |
| 05/21/2008 | DE19824054B4 Ausbauschreiteinrichtung für den Streb-Strecken-Übergangsbereich Border expansion device for the longwall Range transition zone |
| 05/21/2008 | DE102006053630A1 Valve unit for underground structure, has block-like valve housing arranged with valve cartridge, and backwash filter is fixed to valve housing |
| 05/21/2008 | CN201062525Y Four-post supporting secured low-roof coal bracket |
| 05/21/2008 | CN201062524Y Two-post secured low-roof coal hydraulic bracket |
| 05/21/2008 | CN201062523Y Mining top cutting pillar |
| 05/21/2008 | CN101182780A Coal mine down-hole splited articulated look ahead supporting support |
| 05/21/2008 | CN101182779A Slipping chock-frame-type powered support |
| 05/21/2008 | CN101182777A Valve cell |
| 05/15/2008 | DE102006053629A1 Filter station for underground mining, has valves i.e. poppet valves, provided for connecting inlet of backflushing filters with backflushing connector, and third valve provided for alternately detaching one of filters from feeder |
| 05/14/2008 | CN201059200Y Hydraulic support suitable for comprehensive mechanized caving coal working face |
| 05/14/2008 | CN201059199Y Hydraulic support suitable for comprehensive mechanized caving coal working face |
| 05/07/2008 | CN101173609A Multilevel control valve |
| 04/30/2008 | CN201053327Y Inner support conjuncted self-walking type caving coal hydraulic support inner support device |
| 04/30/2008 | CN201053326Y Inner support conjuncted self-walking type caving coal hydraulic support side-pushing device |
| 04/30/2008 | CN201053325Y Inner support conjuncted self-walking type caving coal hydraulic support |
| 04/30/2008 | CN201053324Y Inner support conjuncted self-walking type caving coal hydraulic support arch beam |
| 04/23/2008 | CN201050380Y Extremely thin coal seam plough bracket |
| 04/16/2008 | CN201047284Y Down-hole hydraulic system capable of differentiating the type of hydraulic pipe |
| 04/02/2008 | CN201043474Y Advanced support hydraulic support in series at upper and lower ends of coal mining tunnel |
| 04/02/2008 | CN201043473Y Tunnel end bracket group for down-hole combined mining working surface |
| 04/02/2008 | CN201043471Y Pilot-operated check valve for hydraulic support of suspension upper beam |
| 03/26/2008 | CN201041047Y Spraying integral valve for fully-mechanized mining and synthetical support moving and coal caving |
| 03/26/2008 | CN201041046Y Combined hydraulic support stand |
| 03/26/2008 | CN101148990A Down-hole tunnel suspended stepping self-moving advance timbering |
| 03/20/2008 | DE102006041572A1 Construction shield for underground mining, has skid and casing, between which plunger is arranged and sound sensors are affixed at skid and casing |
| 03/19/2008 | CN201037424Y Electricity-liquid control change-over valve for hydraulic support |
| 03/19/2008 | CN101147106A Extraction controller for coal mining |
| 03/13/2008 | DE202007001277U1 Führungsschuh für einen Walzenlader und Verschleißeinsätze für Führungsschuhe Guide shoe for a shearer and wear inserts for guide shoes |
| 03/12/2008 | CN101139932A Construction shield for underground mining |
| 03/05/2008 | CN201031709Y Fully Mechanized working faces along track end head bracket |
| 03/05/2008 | CN201031708Y Working face self moving cover bracket |
| 02/28/2008 | DE202007001142U1 Schildausbaugestell für den Bergbau sowie Lenker und Liegendkufe hierfür Shield support frame for the mining industry as well as handlebars and floor runner this |
| 02/27/2008 | CN201027543Y Assembled stand for suspending upper beam |
| 02/27/2008 | CN100371559C Hydraulic supporter for end of widening working face |
| 02/20/2008 | CN201025056Y Push movement pole for hydraulic pressure supporter |
| 02/20/2008 | CN201025055Y Rotary supporting device for top beam |
| 02/20/2008 | CN201025054Y Hydraulic pressure supporter for removable combined top beam |
| 02/20/2008 | CN201025053Y Hydraulic pressure supporter for exploration filling on coal mine working ground |
| 02/20/2008 | CN201025052Y Hydraulic pressure supporter with front covert combined top beam |
| 02/20/2008 | CN201025051Y Cover type hydraulic supporter |
| 02/20/2008 | CN201025050Y Hydraulic pressure supporter for mine with spraying machine |