| 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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| 05/19/2010 | CN201474714U Pulling top beam hydraulic support frame |
| 05/19/2010 | CN201474713U An anti-falling device for fully mechanized coal winning hydraulic support |
| 05/19/2010 | CN101709653A Hydraulic support and supercharging device thereof |
| 05/19/2010 | CN101709652A Hydraulic support and telescopic girder device thereof |
| 05/19/2010 | CN101709644A Comprehensive mechanical coal mining complete equipment and protection system thereof |
| 05/12/2010 | CN201460947U Beam supporting device |
| 05/12/2010 | CN201460946U Combined beam hydraulic support |
| 05/12/2010 | CN201460945U Traction type slipping hydraulic bracket system |
| 05/12/2010 | CN201460944U Automatically-circulating advanced hydraulic support |
| 05/12/2010 | CN201460943U Vertical guide rod connecting mechanism of light hydraulic support |
| 05/12/2010 | CN201460942U Mining and filling hydraulic bracket |
| 05/12/2010 | CN201460941U Mining and filling integrated hydraulic bracket |
| 05/12/2010 | CN201460940U Filling and timbering hydraulic support with tamping mechanism |
| 05/12/2010 | CN201460939U Filling and timbering hydraulic support with a tamping mechanism |
| 05/12/2010 | CN201460938U Forward supporting type end hydraulic support |
| 05/12/2010 | CN201460937U Self-moving gateway advanced supporting bracket |
| 05/12/2010 | CN201460936U Filling timbering hydraulic support |
| 05/12/2010 | CN201460935U Filling timbering integrated hydraulic support |
| 05/12/2010 | CN201460934U Filling timbering hydraulic support |
| 05/12/2010 | CN201460924U Intrinsic safety type electric pilot operated directional control valve for mine |
| 05/12/2010 | CN201460892U Shoring and conveying integrated low seam fully mechanized mining equipment |
| 05/12/2010 | CN101705834A Operation panel of hydraulic support frame controller |
| 05/12/2010 | CN101705833A Human-computer interface control panel of hydraulic support frame controller |
| 05/12/2010 | CN101705832A Machine shell of hydraulic support frame controller |
| 05/12/2010 | CN101191419B Fully mechanized working faces track along end head bracket |
| 04/28/2010 | CN201443409U Pulling type supporting frame system |
| 04/28/2010 | CN201443396U Excavating, anchoring and supporting all-in-one machine |
| 04/28/2010 | CN101699218A Hydraulic support and height measuring device thereof |
| 04/15/2010 | DE102008029014B3 Schildausbaugestell für den untertägigen Bergbau und Flächenstützelement hierfür Shield support frame for underground mining and surface support member therefor |
| 04/14/2010 | CN201437731U Traction-type suspension hydraulic bracket system |
| 04/07/2010 | CN201436373U Passing frame |
| 04/07/2010 | CN101265808B Coal mine conjuncted asynchronous bracket filled block wall |
| 03/31/2010 | CN201433782Y Crawler type traveling hydraulic support main controller |
| 03/31/2010 | CN201433778Y Hydraulic support having a lifting function |
| 03/31/2010 | CN201433777Y Gob-side entry retaining work die holder |
| 03/25/2010 | WO2010031501A1 Longwall equipment having a cutter loader guided on the longwall conveyor in a height adjustable manner |
| 03/24/2010 | CN201428469Y Hydraulic bracket with high inclination-angle end |
| 03/18/2010 | WO2009153734A3 Shield support assembly for underground mining and supporting surface element therefor |
| 03/17/2010 | CN201424949Y Rib protector for underground coal faces of coalmines |
| 03/17/2010 | CN201424948Y Mobile side guard device and hydraulic support |
| 03/10/2010 | CN201420563Y Hydraulic support and traction device thereof |
| 03/10/2010 | CN100593629C Floating bidirectional lock under pressure and protection type hydraulic support control system |
| 03/10/2010 | CN100593628C Electric hydraulic controlled caving coal method and it hydraulic supporter |
| 03/10/2010 | CN100593627C Fully mechanized caving face along-track end bracket |
| 03/03/2010 | CN201416452Y 6.2m high hydraulic bracket with high safety performance |
| 02/24/2010 | EP2156017A2 Shield control device for carrying out the longwall function of a longwall unit in the longwall face working in a mine |
| 02/24/2010 | CN201412176Y Shield support used in mining and guide rods and bases thereof |
| 02/17/2010 | CN201407063Y Multifunctional tunnel operating platform frame |
| 02/17/2010 | CN201407062Y Temporary shield support of fully-mechanized roadheader |
| 02/11/2010 | DE102007044641B4 Ventil Valve |
| 02/10/2010 | CN201401187Y Remote controller of crawler-type walking hydraulic bracket |
| 02/10/2010 | CN201401186Y Remote controller of crawler-type walking hydraulic bracket |
| 02/10/2010 | CN201401185Y Mechanized conveying device for four-corner channel |
| 02/10/2010 | CN201401184Y Assembly rack for comprehensively mechanized hydraulic bracket |
| 02/10/2010 | CN101644162A Self-circulation type advanced hydraulic support |
| 02/04/2010 | DE102008047582B3 Strebausrüstung mit einem höhenverstellbar auf dem Strebförderer geführten Walzenschrämlader Longwall equipment with a height-adjustable performed on the face conveyor Shearer |
| 02/03/2010 | CN201396180Y Device for sealing off dust between hydraulic supports for coal mines |
| 02/03/2010 | CN201396175Y Balance jack differential directional lock |
| 02/03/2010 | CN201396164Y Coal mine hydraulic support reciprocating dynamic sealing assembly structure |
| 01/28/2010 | DE102008050068B3 Verfahren zum Steuern der Gewinnung in Strebbetrieben mittels Überwachung des Bergeanteils in der Förderung A method for controlling the extraction in longwall operations by monitoring the mountains share in the promotion |
| 01/28/2010 | DE102008029085B3 Schildkappe für einen Schildausbau Shield cap for a shield support |
| 01/27/2010 | CN201391330Y Lateral retaining wall device and hydraulic support |
| 01/27/2010 | CN201391324Y Comprehensive mining hydraulic support of complete top plate of light type thin coal seam |
| 01/27/2010 | CN101634230A Coal face self-moving forepoling |
| 01/27/2010 | CN100585127C Timbering and walling controller for controlling the movements of timbering and walling units in the coal face of a mine |
| 01/27/2010 | CN100585126C Control mechanism for the extension units in the longwall face of a mine |
| 01/21/2010 | DE102006041572B4 Ausbauschild für den Untertagebau Longwall shield for underground mining |
| 01/20/2010 | CN201386567Y Mechanized roadway advance support bracket |
| 01/20/2010 | CN201386566Y Translation upper beam hydraulic bracket |
| 01/20/2010 | CN100582436C Controller for electrohydraulic prop control |
| 01/20/2010 | CN100582435C Fully mechanized working faces along conveying end head hydraulic bracket |
| 01/20/2010 | CN100582434C Liquid control one-way valve for suspension moving top beam hydraulic chock |
| 01/14/2010 | WO2010003214A1 Method of reducing stress on tunnel rock face under heavy overburden conditions |
| 01/13/2010 | CN201381869Y Bottom lifting mechanism of hydraulic support |
| 01/13/2010 | CN201381868Y Hydraulic support telescopic top beam with face guard mechanism |
| 01/13/2010 | CN201381867Y Filling-type hydraulic support |
| 01/06/2010 | CN201377334Y Flexible side protecting band |
| 01/06/2010 | CN101619657A Coal-caving supporter |
| 01/06/2010 | CN100577984C Down-hole coal excavation apparatus |
| 12/30/2009 | CN201373999Y Fourteen-channel solenoid valve actuator |
| 12/30/2009 | CN201373998Y Twenty two-channel solenoid valve actuator |
| 12/30/2009 | CN201372806Y Annular hydraulic control multi-switching valve |
| 12/30/2009 | CN201372805Y Roadway advance support bracket |
| 12/30/2009 | CN101614131A Flexible gliding hydraulic bracket system |
| 12/30/2009 | CN100575665C Low coal seam coverture type hydraulic support |
| 12/23/2009 | WO2009153760A1 Shield cap for a shield-type mining support |
| 12/23/2009 | WO2009153734A2 Shield support assembly for underground mining and supporting surface element therefor |
| 12/23/2009 | CN201367911Y Crawler walking type hydraulic support |
| 12/02/2009 | CN201354643Y Comprehensive digging advanced support device |
| 12/02/2009 | CN201354642Y Large-scale self-advancing gob-side entry retaining filling supporting stand |
| 12/02/2009 | CN101592035A Large mining height shield type low caving coal hydraulic support |
| 12/02/2009 | CN101592034A Super large mining height hydraulic support with super high working resistance |
| 12/02/2009 | CN100564901C Valve for hydraulic props of shield-type support frames, and shield-type support frame |
| 11/26/2009 | DE102007035848B4 Ausbauschild, Verfahren zur Steuerung eines Ausbauschildes und Verfahren zur Positionsbestimmung eines Ausbauschildes Longwall shield, method for controlling an expansion shield and method for determining the position of a longwall shield |
| 11/25/2009 | CN101586460A Coal mining solid filling method |
| 11/18/2009 | CN201347767Y Single hydraulic prop composite support |
| 11/11/2009 | CN201344041Y Stepping self-moving type bracket |
| 11/11/2009 | CN201344036Y Hydraulic bi-directional lock |
| 11/11/2009 | CN101575982A Large-channel straight guide type caving-coal transitional hydraulic bracket |
| 11/11/2009 | CN100559014C Multilevel control valve |