| 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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| 01/11/2007 | US20070009332 Automated, low profile drilling/bolting module with single button operation |
| 01/04/2007 | US20070003382 Automated, low profile drilling/bolting module with automated stab jack |
| 01/04/2007 | DE102005013062A1 Control method for buttressing work across a preset face-advance surface uses buttressing with a means of output and a conveyor linked to a self-advancing support |
| 12/28/2006 | DE102005029055A1 Valve cartridge has housing, spring-loaded piston in housing, sleeve pushed onto piston, housing has load, switching pulse, pump and tank connections; piston is axially movable in housing longitudinal bore between pump, tank end positions |
| 12/27/2006 | CN1886575A Hydraulic circuit used for longwall face removal |
| 12/20/2006 | EP1276969B1 Mining machine and method |
| 12/20/2006 | CN1882797A Pressure relief valve |
| 12/14/2006 | WO2006133190A2 Automated, low profile drilling/bolting machine |
| 12/14/2006 | WO2006130918A1 Roof support for mines |
| 12/07/2006 | DE202006015595U1 Longwall compact distributor e.g. for underground mining, is modular unit having different connection modules for attachment to main module and having high pressure hole and return hole |
| 12/06/2006 | CN2844442Y Two-pillar emerged large-extractive high-top coal hydraulic stand |
| 11/30/2006 | US20060267395 Coal face support in a mine |
| 11/22/2006 | CN2839562Y Movable alley hydraulic support |
| 11/08/2006 | EP1719876A1 Stope support for underground gallery. |
| 11/01/2006 | CN2833112Y Combined forepoling rack for comprehensive mining return |
| 10/31/2006 | US7127885 Assembly for use in underground mining |
| 10/31/2006 | CA2253077C Tensionable cable truss support system |
| 10/25/2006 | CN2830642Y Rail sequential groove forward horizontal telescopic hydraulic prop supporting system of coal working face |
| 10/25/2006 | CN1851235A Thick coal-bed shield hydraulic support |
| 10/18/2006 | CN2828315Y Straddle type leading support for coal mine comprehensive coal mining haulage drift |
| 10/12/2006 | DE202006011745U1 Panel support rack with distortion plates has closure element for fitting opening(s) secured/releasably secured in latch plate retaining mechanism by latch plate on inner side of plate section facing pin holder with locking of catch element |
| 10/11/2006 | CN2825954Y Support-moving reference apparatus for hydraulic support with slip roof timber |
| 10/05/2006 | US20060220438 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 09/28/2006 | US20060213363 Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 09/28/2006 | DE19736662B4 Abbaueinrichtung für den Untertagebergbau Mining equipment for underground mining |
| 09/21/2006 | WO2006097097A1 Extraction controller for coal mining |
| 09/21/2006 | US20060207251 Method and device for pressure amplification in cylinders, in particular hydraulic rams |
| 09/21/2006 | DE102006012693A1 Excavation completion machine for coal working has screen control for excavator shields allowing visual control of winning machine |
| 09/06/2006 | CN1828020A Machine-carried forepoling device |
| 08/31/2006 | US20060193702 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 08/30/2006 | CN1824921A Bullet mining hydraulic support |
| 08/02/2006 | EP1685342A1 Pressure relief valve |
| 07/26/2006 | CN1266371C Combined roof support with drawing beam |
| 07/20/2006 | US20060158016 Control mechanism for the extension units in the longwall face of a mine |
| 06/21/2006 | CN1260479C Electrohydraulic control apparatus |
| 06/14/2006 | CN2787833Y Hydraulic support for fully-mechanized top-coal caving face end |
| 06/14/2006 | CN1786420A Electric hydraulic controlled caving coal method and it hydraulic supporter |
| 06/14/2006 | CN1786419A Hydraulic supporter for end of widening working face |
| 06/08/2006 | DE102004061075A1 Pressure relief valve for hydraulic ram has valve housing at valve inlet over projecting valve connection and steadying zone is provided on the valve inlet to smoothen turbulence before actual valve |
| 05/24/2006 | CN2782932Y Hydraulic temporary front support device for integrated drilling |
| 05/24/2006 | CN1777758A Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 05/17/2006 | CN2780992Y Electrichydraulic control caving coal hydraulic chock |
| 04/19/2006 | CN1761818A Hydraulically switchable directional control valve |
| 04/19/2006 | CN1761800A Hydraulic control for face support |
| 04/13/2006 | DE102005001994B3 Process to control a pressure drop in hydraulic power cables in mines has feed cable, consumer cable coupled to bypass cables which connect the consumer and feed cables in assymmetric series |
| 04/13/2006 | DE102004061720B3 Method to secure a haulage crossing in mining according to which a support part coupled to a conveyor carries props holding rails which are laid down after support is dug out and set down again providing ongoing support during mining |
| 04/05/2006 | CN1249329C Control apparatus for controlling electrohydraulic mining machine |
| 03/30/2006 | DE102005045160A1 Switching device for electromagnetic hydraulic valves for shield-type mining support has housing in two parts with connection housing for connection to computer housing in watertight manner by means of manually operated clamp element |
| 03/29/2006 | CN2767727Y Big flow reversing valve |
| 03/23/2006 | DE102004036163A1 Controller for electrohydraulic expansion controllers has connection strip with additional holder in which connecting plug is fixed to which lamp connecting plug can be connected to connect lamp to intrinsically safe external power supply |
| 03/02/2006 | US20060042243 Hydraulic control for a longwall support |
| 03/02/2006 | DE4400677B4 Entlastungsventil für ein Strebausbaugestell Relief valve for a mine roof support |
| 02/22/2006 | CN1737335A Top plate control method of Wangeviry coal mining region |
| 02/15/2006 | CN2758486Y Fast supporter moving device of 'three soft' coal layer composite mining top coal supporter series |
| 02/02/2006 | US20060024138 Prop head bearing |
| 02/02/2006 | DE202005014866U1 Valve cartridge has housing, spring-loaded piston in housing, sleeve pushed onto piston, housing has load, switching pulse, pump and tank connections; piston is axially movable in housing longitudinal bore between pump, tank end positions |
| 02/01/2006 | CN2755285Y Movable hydraulic supports for protruded support suspension in coal gallery |
| 02/01/2006 | CN1729349A Control mechanism for the extension units in the longwall face of a mine |
| 02/01/2006 | CN1729348A Coal face support in a mine |
| 02/01/2006 | CN1727640A Controller for electrohydraulic prop control |
| 01/31/2006 | US6991407 Lift cylinder assembly |
| 01/25/2006 | CN1726337A Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 01/25/2006 | CN1726336A Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 01/19/2006 | US20060014439 Individual controller for shield support frames |
| 01/18/2006 | CN1721656A Single controlling apparatus for shielding bracket |
| 12/22/2005 | DE202005016207U1 Supply line for connecting hydraulic mine support to hydraulic supply system fed along conveyor has variable length connecting inner channel formed by cylindrical tube and telescopically guided piston arrangement within it |
| 11/30/2005 | CN1702300A Arrangement for quickly shifting sublevel caving hydraulic support series for fully-mechanized mining of three-soft coal bed |
| 11/23/2005 | EP1597484A1 Method and device for pressure amplification in cylinders, in particular hydraulic rams |
| 10/19/2005 | CN2735001Y Hydraulic roadway support for moving fully-mechanized mining equipment in coal mine |
| 10/13/2005 | DE202005008960U1 Plate extension frame with arrangement for securing linkage bolts has locking element mounted in two diametrically opposed locking holders welded on next to bolt accommodating bore and secured |
| 10/12/2005 | CN2732996Y Side guard plate for coal mining support |
| 10/05/2005 | CN1221727C Continuous miner house column type short arm mechanized coal mining process |
| 08/25/2005 | DE202004011227U1 Individual control unit for support structures in mines comprises a sheet-metal housing which accommodates electronic equipment, and is provided with an operating keyboard on its front face |
| 08/25/2005 | DE202004011226U1 Einzelsteuergerät für Schildausbaugestelle Individual control device for shield support frames |
| 07/21/2005 | DE10361325A1 Liegendkufen-Aushebevorrichtung für Grubenausbaugestelle Floor runners-lifting device for mine roof racks |
| 07/20/2005 | CN1211565C Method and device for remote-controlled operation of control apparatus |
| 07/14/2005 | WO2005064118A1 Mine roof support frame comprising an excavating device with floor skids |
| 07/14/2005 | DE202005007725U1 Protective shield for underground mining has a compact design with covers over the support levers to prevent jamming by small stones and debris |
| 07/14/2005 | DE202005005558U1 Shield support frame, at the coal face in a coal mine, has a swing plate structure at the sledges with smooth surfaces and no sharp edges |
| 07/13/2005 | CN1210544C Method and device for detecting persons existing state in mine |
| 07/07/2005 | DE202005007257U1 Ausbaugestell für eine untertägige Strecke Support frame for an underground route |
| 06/16/2005 | WO2005054629A1 Hydraulic circuit used for longwall face removal |
| 06/09/2005 | DE10353982A1 Druckbegrenzungsventil Pressure relief valve |
| 06/02/2005 | WO2005050072A1 Pressure relief valve |
| 05/18/2005 | CN1616796A Suspending movable hydraulic support rack for advanced support in coal cutting roadway |
| 04/13/2005 | CN1605714A Working face apparatus for excavation |
| 03/10/2005 | US20050053430 Face equipment for mining machinery |
| 02/22/2005 | US6857705 Mining machine and method |
| 02/02/2005 | CN1573014A Hydraulic shield support |
| 02/01/2005 | US6848748 Mining system with drilling, loading, conveyor, and support |
| 01/27/2005 | DE10328286A1 Hydraulischer Schildausbau Hydraulic roof supports |
| 01/26/2005 | CN2674095Y 2L type hydraulic support frame |
| 12/23/2004 | US20040258487 Hydraulic shield support |
| 12/16/2004 | US20040254651 Controller for underground mining |
| 12/09/2004 | US20040244999 Lift cylinder assembly |
| 12/09/2004 | DE102004017712A1 Hydraulic control for a face support in mining comprises control valves divided into groups with each group connected to a hydraulic pressure pipe by a supply pipe |
| 12/02/2004 | WO2004104375A1 Hydraulic control for face support |
| 12/02/2004 | DE10348099B3 Longwall for underground mining comprises a roof member that is assigned a lower member which is supported by a hydraulic piston and is hinged at one end to the roof member |
| 12/01/2004 | CN1550941A Control device for underground mining |
| 12/01/2004 | CN1550639A Apparatus for lifting cylinder |