| 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) |
|---|
| 12/01/2004 | CN1550638A System comprised by hydraulic assembly and actuator and/or sensor |
| 11/25/2004 | DE202004015149U1 Shield mining gallery, includes device for supplying lubricant to socket for ball shaped prop head |
| 11/18/2004 | WO2004099628A1 Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 11/17/2004 | CN1546839A Ladder type mining method using united pillars to support roof and partition stope |
| 11/11/2004 | US20040221713 Assembly for use in underground mining |
| 10/14/2004 | DE202004010716U1 Skid lifting jack assembly for deep mine longwall coal face screen has box-frame welded steel construction |
| 10/07/2004 | US20040196160 Face support control system |
| 10/07/2004 | DE202004012138U1 Stempelkopflagerung zwischen Kappe und Stempel eines Schildausbaugestells Punch head positioning between the cap and the stamp of a shield support frame |
| 10/06/2004 | CN1534163A Working face supporting frame control device |
| 10/06/2004 | CN1170052C Top protecting support |
| 09/23/2004 | DE10310893A1 Anordnung aus hydraulischen Bauteilen sowie Aktoren und/oder Sensoren für den untertägigen Bergbau Assembly of hydraulic components and actuators and / or sensors for underground mining |
| 09/08/2004 | CN1526914A Hydraulic coal mine support for low-position roof blasting-down |
| 09/01/2004 | CN2637735Y Combined support with sliding beam |
| 08/26/2004 | WO2004072486A1 Method and device for pressure amplification in cylinders, in particular hydraulic rams |
| 08/26/2004 | DE10306128A1 Method for increasing pressure in working cylinder has a smaller inner piston to further compress the fluid and achieve a working pressure greater than the pump pressure |
| 08/25/2004 | CN1163661C Shield support for thick coal layer |
| 07/15/2004 | WO2004059129A1 Control mechanism for the extension units in the longwall face of a mine |
| 07/08/2004 | DE202004007635U1 Hydraulic roof prop for use in underground mining has sensor system to protect prop against damage by wedged rock fall |
| 07/01/2004 | WO2004055330A1 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 07/01/2004 | WO2004055329A1 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine |
| 07/01/2004 | WO2004055328A1 Coal face support in a mine |
| 07/01/2004 | DE10141044B4 Sicherheitseinrichtung für mit einem Strebförderer gekoppelte Antriebseinheit Safety device coupled with a face conveyor drive unit |
| 06/02/2004 | CN1500968A Tunnel rupture type excavating method and excavating units |
| 05/13/2004 | DE20305309U1 Strebausbausteuerung Longwall control |
| 05/13/2004 | DE10116916B4 Verfahren und Vorrichtung zur Erhöhung der Stempelkräfte bei untertägigen Ausbaueinheiten Method and apparatus for increasing the punch forces in underground longwall units |
| 04/28/2004 | CN2613592Y Machine carried temporary support for coal mine tunnel |
| 04/21/2004 | CN2612799Y Hydraulic prop frame for low position blasting down the roof coal |
| 04/08/2004 | DE10004497B4 Verfahren zur Spielmessung bei einer im untertägigen Bergbau einsetzbaren Schreitausbaueinheit sowie zur Durchführung des Verfahrens eingerichtete Schreitausbaueinheit Method for measurement at a game that can be used in underground mining powered roof unit and equipped for performing the method powered support unit |
| 04/07/2004 | CN2610094Y Hydraulic support of top-coal saving face |
| 04/07/2004 | CN2610093Y End support top coal drop-in tail boom device of top-coal caving face |
| 04/07/2004 | CN2610092Y Hydraulic support swallow-tail device for top-coal caving face |
| 04/01/2004 | WO2004027215A1 An apparatus for supporting a tunnel |
| 03/18/2004 | DE20320058U1 Mine gallery support frame, has runner lifting device which is rotatable about vertical axis |
| 03/17/2004 | CN1482343A Continuous miner house column type short arm mechanized coal mining process and support equipment thereof |
| 03/11/2004 | DE19636389B4 Verfahren und Einrichtung zur Lastüberwachung von hydraulischen Schildausbaugestellen für den Untertagebergbau Method and apparatus for load monitoring of hydraulic roof support structures for underground use |
| 03/11/2004 | DE19546427B4 Ausbausteuerung Development control |
| 03/04/2004 | DE4202246B4 Gewinnungseinrichtung Obtaining means |
| 02/18/2004 | CN1138904C Hydraulic drivage support with front cantilever |
| 02/05/2004 | DE10018597B4 Steuerung für den Strebausbau Control for the longwall |
| 01/29/2004 | DE10018481B4 Einrichtung zur Übertragung der Gesteinsdaten für die Einstellung des Verhiebs einer Abbaumaschine Means for transmitting the rock data for setting the Verhiebs a mining machine |
| 01/15/2004 | DE20316659U1 Hydraulic longwall used in underground mining, especially as a shield-type support, comprises a footwall runner having a lifting device with a lifting cylinder held at one end |
| 01/08/2004 | DE20315900U1 Longwall for underground mining operations comprises a hydraulic piston arranged between a horizontal runner and a roof member provided with a rock burst damping unit |
| 01/06/2004 | US6672674 Longwall mining with blasting |
| 12/18/2003 | DE19982113C1 Surface mining control arrangement, having position sensor and microprocessor, for transmitting detected position- and/or movement direction signals over radio to shield control arrangement |
| 12/03/2003 | CN2589680Y Crawler belt walking type hydraulic support |
| 12/03/2003 | CN1129703C Method of raising exploitation efficiency in work area of coal mine |
| 10/23/2003 | DE10215576C1 Elektrohydraulische Steuereinrichtung Electrohydraulic control device |
| 10/22/2003 | CN1450273A Electrohydraulic control equipment |
| 10/16/2003 | US20030194886 Electrohydraulic control system |
| 09/09/2003 | US6616122 Electromagnet switching device |
| 08/28/2003 | DE20309693U1 Check valve for hydraulic rams of hydraulic shield-type support frames has threaded holes in one or both sidewalls of valve block for detachable fastening of add-on housing serving for additional hydraulic functions of support frame |
| 08/07/2003 | US20030146655 Extraction machine for underground ore extraction operations and a method of extracting output products in underground ore extraction operations |
| 08/06/2003 | CN1434192A Combined roof support with drawing beam |
| 07/23/2003 | EP1276969A4 Mining machine and method |
| 07/22/2003 | US6597579 Control device for electrohydraulic mining controllers |
| 07/17/2003 | DE20305436U1 Roof support system for mouth of tunnel or roadway in coal mine adjacent to coal face has support members resting on floor and holding actuators and movement control linkage for roof support |
| 07/08/2003 | US6590504 Method and apparatus for the remote controlled actuation of a control device |
| 06/25/2003 | CN2557698Y Coal saving device matched used with light coal support frame |
| 04/24/2003 | US20030075970 Mining machine and method |
| 03/18/2003 | US6535771 Extraction controller for mining—extraction machines |
| 02/12/2003 | CN1396982A Mining machine and method |
| 01/28/2003 | US6512312 Method and a device for detecting the presence of personnel in underground mining |
| 01/22/2003 | EP1276969A1 Mining machine and method |
| 01/21/2003 | US6509842 Control system for a longwall support |
| 12/25/2002 | CN2527710Y Combined support with towing beam |
| 11/19/2002 | US6481933 Powered support frame for large seam thicknesses with controlled gap sealing plates |
| 11/19/2002 | US6481802 Control system for longwall face alignment |
| 10/24/2002 | DE10207698A1 Longwall face control system for use in mine uses longwall shields each with shield control linked to valve controls linked via two-core cable and power transmitters with hydraulic control valves |
| 10/23/2002 | CN1375642A Electromagentic switching apparatus |
| 10/17/2002 | DE10116916A1 Hydraulic coal face lining system uses an initial pressure level at the ram, followed by a second and higher pressure level after a time delay, to increase the tunnel lining rate |
| 10/17/2002 | DE10116915A1 Progressive tunnel lining system, in underground coal mining, has a hydraulic ram supported on the runner by a lower section, forming a box structure with the U-shaped runner for increased flexibility |
| 09/19/2002 | US20020130745 Electromagnet switching device |
| 09/12/2002 | DE10018481A1 Mining control system has central computer that generates command signals based on retransmitted radio signal having greatest intensity, for advance of cutting rolls |
| 09/06/2002 | WO2002068798A1 Longwall face control for longwall face working |
| 08/21/2002 | CN1364974A Top protecting support |
| 07/17/2002 | CN1087807C Hydraulic prop frame for low position blasting down the roof coal |
| 06/20/2002 | US20020074849 Extraction machine for underground ore extraction operations and a method of extracting output products in underground ore extraction operations |
| 06/04/2002 | US6398181 Valve arrangement |
| 04/04/2002 | DE10046497A1 Ore mining equipment with powered support and conveyor uses demountably fitted drill and loader on unit riding face conveyor plus fitted blast shields and guard waste-side of conveyor with sealable drawhole in support canopy. |
| 04/03/2002 | CN1082130C Hydraulic walking type support |
| 03/26/2002 | US6361119 Mining control system for adjusting the advance of mining tools |
| 02/20/2002 | CN1079489C Combined hydraulic support |
| 02/13/2002 | CN2476644Y Anti-collapse apparatus for work shed |
| 12/19/2001 | CN2466351Y Full-shield powered support of high-, middle- and low-level caving coal |
| 11/01/2001 | WO2001081726A1 Mining machine and method |
| 10/17/2001 | CN2454541Y Top coal support of track type slide top beam |
| 09/20/2001 | DE19851349C2 Wegmeßgeber mit Reedkontakten für die Zylinderwegmessung im Schreitausbau Encoders with reed contacts for the cylinder stroke in the roof supports |
| 08/29/2001 | CN1310285A Technological method of raising exploitation efficiency in work area of coal mine |
| 08/23/2001 | DE10004497A1 Method to control self-advancing support unit for underground excavation; involves using cylinder to push conveyor and pull support and has device to measure clearance between cylinder and conveyor |
| 08/02/2001 | DE10002987A1 Schnitt-Tiefeneinstellung einer Gewinnungseinrichtung im Bergbau Cutting depth setting a recovery device in mining |
| 06/13/2001 | CN1067136C Steering type hydraulic support |
| 06/07/2001 | DE19958665A1 Method for working underground coal face provided with electro-hydraulic reinforcement frames involves measurement of timewise variation of piston pressure in main cylinders of reinforcement frames |
| 05/23/2001 | CN1296116A Hydraulic prop frame for low position blasting down the roof coal |
| 05/10/2001 | DE19953526A1 Protective shield for underground mining operation has laterally expanding sections linked to a common hydraulic feed |
| 04/05/2001 | DE19946848A1 Pressure relief valve for protecting hydraulic brace systems in downhole machinery from pressure surges has damping chamber between valve piston and equalising chamber and sheet spring biased by valve spring at top of damping chamber |
| 02/22/2001 | DE19938815A1 Valve assembly for underground hydraulic systems for mining and tunneling equipment has a filter which separates and retains dirt carried in the hydraulic fluid to be removed for disposal |
| 02/21/2001 | CN2420422Y Automatic controlled top coal working rack |
| 01/20/2001 | CA2313933A1 Mine roof truss with bent angle bolts |
| 01/17/2001 | CN1280295A Method and device for detecting persons existing in mine |
| 01/11/2001 | DE10029918A1 Verfahren und Einrichtung zum Erfassen der Anwesenheit von Personen im untertägigen Bergbau Method and apparatus for detecting the presence of people in underground mining |