| Patents for E21C 35 - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or (6,127) |
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| 11/12/2008 | EP1733120B1 Rotary cutting bit |
| 11/12/2008 | CN201149080Y Rotary sealing device with water seal at exterior |
| 11/12/2008 | CN201149023Y Tightened connection bolt anti-loose mechanism for coal mine working face coal winning machine |
| 11/12/2008 | CN201148874Y Inner spray sealing device of development machine |
| 11/12/2008 | CN201148870Y Connection structure of main body and walking part for coal mine mining machine |
| 11/12/2008 | CN201148869Y Rolling and matching structure of plough head and slide rack for coal planing machine |
| 11/06/2008 | WO2008131867A1 Device for determining the cutting horizon of a mining extraction system, and pan element therefor |
| 11/06/2008 | US20080272207 Water spray assembly |
| 11/05/2008 | CN201144701Y Light belt conveyor |
| 11/05/2008 | CN201144700Y Inner-water-spraying system for coal mine fully-mechanized face coal cutter |
| 11/05/2008 | CN101300404A Circular-shank tool comprising a tool holder |
| 11/04/2008 | US7445294 Attack tool |
| 11/04/2008 | CA2526264C Method and arrangement for extracting extraction products in underground mining |
| 10/30/2008 | DE102006031824B4 Gewinnungsmaschine mit Gleitschuh sowie Gleitschuh hierfür Extraction machine with slipper and shoe this |
| 10/30/2008 | DE10029918B4 Verfahren und Einrichtung zum Erfassen der Anwesenheit von Personen im untertägigen Bergbau Method and apparatus for detecting the presence of people in underground mining |
| 10/29/2008 | CN201141304Y coal mining safety device with large inclination angle |
| 10/29/2008 | CN101297100A Circular-shank tool comprising a tool holder |
| 10/29/2008 | CN101297099A Rotatable cutting tool with reverse tapered body |
| 10/23/2008 | US20080258536 High-impact Resistant Tool |
| 10/22/2008 | CN101289936A Hard rock tunneling machine |
| 10/16/2008 | WO2008082316A3 Water spray nozzle and method of optimization of working parameters of water spray nozzle |
| 10/16/2008 | DE102007030640B3 Tool for mounting a chisel/cutter on a cutter-tool holder has a pick-up section, a draw-in section and a final control element with a shear-off section |
| 10/15/2008 | EP1869286B1 Plastic ring for removeably fixing a round shank chisel in a chisel bush |
| 10/15/2008 | CN101285383A Brute force and high efficiency extravasation automatic liquid feeder for excavate machine |
| 10/15/2008 | CN100425800C Coal and rock cutting pick |
| 10/09/2008 | DE10354306B4 Bedüsungsvorrichtung mit Nachmischeinrichtung Bedüsungsvorrichtung with Nachmischeinrichtung |
| 10/08/2008 | CN101280683A Coal excavating mining pick inlaid with diamond and manufacturing process thereof |
| 10/07/2008 | US7431401 Slide shoe for mining winning machine |
| 10/01/2008 | EP1974123A1 A holder for holding a tooth on a body of a cutting blade or grinding drum for cutting or grinding rock or hard earth formations |
| 10/01/2008 | EP1646766B1 Method and device for extracting extraction products in underground mining |
| 09/24/2008 | CN101270664A Walking type reversed loader |
| 09/24/2008 | CN101270663A Bestriding type reversed loader |
| 09/24/2008 | CN101270662A Feeding crushing system |
| 09/18/2008 | US20080223744 Tool Holder |
| 09/17/2008 | CN201116472Y Multiple mine car type secondary transporter |
| 09/17/2008 | CN201116471Y Arm cutting resistant collision shovel plate device |
| 09/10/2008 | CN201114526Y Recording transmission instrument for portable wireless instrument display screen |
| 09/04/2008 | WO2008104249A1 Round shank chisel |
| 09/04/2008 | US20080211290 Tapered Bore in a Pick |
| 09/04/2008 | DE102007009711A1 Round shaft bit, for use in mining and roadbuilding, has head made up of flat base connected to point by curved section and cylindrical section above it, curve forming part of ellipse |
| 09/03/2008 | EP1963019A1 A liner component for use in mining and quarrying industries |
| 09/03/2008 | CN201110177Y External water channel inner spraying device |
| 09/03/2008 | CN101258303A Arrangement for extracting extraction products in underground extraction operations in caving |
| 09/03/2008 | CN101255796A Reversible cutting tool with shield |
| 09/03/2008 | CN101255795A Reversible cutting tool with shield |
| 09/02/2008 | US7419224 Sleeve in a degradation assembly |
| 08/28/2008 | US20080202819 Reversible cutting tool with shield |
| 08/28/2008 | DE102008010694A1 Wendbares Schneidwerkzeug mit Schild Reversible cutting tool with shield |
| 08/28/2008 | DE102008008954A1 Hülse für austauschbares Schneidwerkzeug Sleeve for replaceable cutting tool |
| 08/28/2008 | DE102007061709A1 Drehbarer Schrämmeißel Rotating cutter picks |
| 08/27/2008 | CN101251013A High abrasion-proof diamond composite cutter bit |
| 08/27/2008 | CN101251012A Radial-protecting method for cutting bit as well as high abrasion-proof composite cutter bit |
| 08/27/2008 | CA2619508A1 Sleeve for reversible cutting tool |
| 08/27/2008 | CA2619264A1 Reversible cutting tool with shield |
| 08/26/2008 | US7416258 Methods of using a laser to spall and drill holes in rocks |
| 08/21/2008 | US20080197691 Locking fixture for a degradation assembly |
| 08/20/2008 | CN101248251A Rotary cutting pick and method of using a cutting pick for mining |
| 08/20/2008 | CN101245705A Diamond compound cutter bit head and its manufacturing method |
| 08/20/2008 | CN101245704A Straight-through refrigerating mechanism of development machine |
| 08/19/2008 | US7413258 Hollow pick shank |
| 08/19/2008 | US7413257 Rotatable cutting tool with reverse tapered body |
| 08/19/2008 | US7413256 Washer for a degradation assembly |
| 08/14/2008 | WO2008095304A1 Belt type conveyor apparatus with adjustable tail pulley |
| 08/14/2008 | WO2008095303A1 Steerable conveyor with height adjustable wheels |
| 08/14/2008 | WO2008095302A1 Conveyor machine having pivot connector comprising curved track and rollers engaging track |
| 08/14/2008 | US20080191541 Geosteering detectors for rotary-type continuous miners |
| 08/14/2008 | DE102007007156A1 Hartmetallspitze für einen Rundschaftmeißel Carbide tip for a round shank chisel |
| 08/13/2008 | EP1956187A2 Tool holder block and sleeve retained therein by interference fit |
| 08/13/2008 | EP1956186A2 Hard metal tip for a round shank pick |
| 08/13/2008 | CN201100128Y Integrated digger |
| 08/12/2008 | US7410221 Retainer sleeve in a degradation assembly |
| 08/12/2008 | US7409785 Cutting element supported on a chain |
| 08/08/2008 | CA2843294A1 Conveyor machine having pivot connector comprising curved track and rollers engaging track |
| 08/08/2008 | CA2578432A1 Steerable conveyor with height adjustable wheels |
| 08/08/2008 | CA2578431A1 Conveyor machine having pivot connector comprising curved track and rollers engaging track |
| 08/08/2008 | CA2578427A1 Belt type conveyor apparatus with adjustable tail pulley |
| 08/07/2008 | US20080185903 Look-ahead radar and horizon sensing for coal cutting drums and horizontal directional drills |
| 08/06/2008 | CN201095985Y Tunelling machine integrating wireless remote control, anchor rod device and inner-water-spraying system |
| 08/06/2008 | CN201095984Y Coal cutter |
| 08/06/2008 | CN101235718A External type water channel inner sprayer unit |
| 08/06/2008 | CN100408807C Assembly for fixing drill on a driven mechanism |
| 07/30/2008 | CN201092854Y Grubbing anchoring protecting integrative grubbing anchor winch |
| 07/24/2008 | DE102006032680B4 Walzenladeantriebsbaugruppe und Führungsschuh hierfür Roll loader drive assembly and guide shoe for this |
| 07/23/2008 | EP1945909A1 Circular-shank tool comprising a tool holder |
| 07/23/2008 | EP1945908A2 Rotatable cutting tool with reverse tapered body |
| 07/23/2008 | CN201090243Y Extension combination device of sealing-tape machine |
| 07/23/2008 | CN201090218Y Freedom positioning device of coal-mining machine |
| 07/23/2008 | CN201090217Y Supporting leg for coal mine working surface coal-mining machine |
| 07/23/2008 | CN201090216Y Device for supporting and arresting horizontal side of driving machine |
| 07/22/2008 | US7401863 Press-fit pick |
| 07/22/2008 | US7401862 Construction machine |
| 07/16/2008 | EP1943409A1 Circular-shank tool comprising a tool holder |
| 07/16/2008 | EP1943408A1 Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element |
| 07/16/2008 | CN101221430A Cutting track and section shaping control system of development machine |
| 07/16/2008 | CN100402795C Cutting tool and method of using same |
| 07/10/2008 | WO2008082316A2 Water spray nozzle and method of optimization of working parameters of water spray nozzle |
| 07/10/2008 | WO2007133463A3 Cutting tool and method of assembling the cutting tool |
| 07/10/2008 | US20080164748 Degradation Assembly |
| 07/10/2008 | US20080164747 Rotary cutting pick |
| 07/09/2008 | EP1941131A1 Cold-formed rotatable cutting tool and method of making the same |