| Patents for E21C 29 - Propulsion of machines for slitting or completely freeing the mineral from the seam (839) |
|---|
| 10/20/2009 | US7604220 Wire guide |
| 09/09/2009 | CN101526000A Coal mining machine |
| 08/12/2009 | CN201288560Y Crawler rack for cantilevered type digging machine |
| 08/12/2009 | CN201288559Y Crawler type walking apparatus for digging machine |
| 08/12/2009 | CN100526687C Drive system for chain sprockets of chain drives |
| 08/12/2009 | CN100526603C Coal cutting machine |
| 07/21/2009 | US7562861 Systems and methods for controlling duct pressurization for cable installation |
| 07/01/2009 | CN100507212C Coal face support in a mine |
| 06/24/2009 | CN101466917A System and method for controlling pipe pressurization of cable installation |
| 06/11/2009 | WO2009033622A3 Extraction device, particularly for mining, and method for controlling the extraction device |
| 05/28/2009 | DE102007055361A1 Chain wheel arrangement used in mining comprises vertical and horizontal chain parts having the same division and an elliptical cross-sectional surface in the region of the curves |
| 05/20/2009 | CN201241702Y Caterpillar belt tightening apparatus of development machine |
| 05/06/2009 | CN201232550Y Novel coupling device for guide skid shoe of walking wheel of coal cutter |
| 05/06/2009 | CN201232549Y Big inclination angle walking boosting device for development machine |
| 04/29/2009 | CN201228547Y Auxiliary side moving mechanism for boring machine |
| 04/22/2009 | CN201225155Y Auxiliary thrusting apparatus of tunneling machine |
| 04/22/2009 | CN201225154Y Auxiliary top running mechanism of tunneling machine |
| 04/09/2009 | WO2007051149A3 Single adapter for connecting a wire puller to a conduit of any of a variety of sizes |
| 04/02/2009 | WO2009003632A3 Drive station for an underground plough system and method for repairing recovery ploughs |
| 03/26/2009 | US20090078921 Cable puller with pivot adjuster for converting between upward and downward cable pulling |
| 03/26/2009 | US20090078283 Pipeline pigs |
| 03/19/2009 | WO2009033622A2 Extraction device, particularly for mining, and method for controlling the extraction device |
| 03/12/2009 | DE102007043043A1 Gewinnungsanlage insbesondere für den Bergbau und Verfahren zum Ansteuern der Gewinnungsanlage Recovery plant especially for mining and method of driving the recovery plant |
| 03/04/2009 | CN201202474Y Multifunctional full hydraulic chain groove type shoveling rock drill |
| 02/26/2009 | DE202008016276U1 Führungskufe mit auswechselbaren Verschleißplatten Guide shoe with replaceable wear plates |
| 02/26/2009 | DE10044919B4 Spanneinheit für die Triebstockkette insbesondere eines Walzenladers Clamping unit for the drive chain Stock particular a shearer |
| 02/24/2009 | US7494190 Coal face support in a mine |
| 02/11/2009 | CN201193524Y Improved electric traction apparatus for rider coal cutter |
| 01/08/2009 | WO2009003632A2 Drive station for an underground plough system and method for repairing recovery ploughs |
| 12/17/2008 | CN201165873Y Crawler walking device without support wheel |
| 12/02/2008 | CA2333225C Wire puller |
| 11/26/2008 | CN201155327Y Development machine |
| 11/12/2008 | CN201148871Y Walking part of development machine |
| 11/12/2008 | CN201148870Y Connection structure of main body and walking part for coal mine mining machine |
| 10/30/2008 | DE102006031824B4 Gewinnungsmaschine mit Gleitschuh sowie Gleitschuh hierfür Extraction machine with slipper and shoe this |
| 10/15/2008 | CN100425882C Chain wheel for underground mining |
| 10/01/2008 | CN201125732Y Mine explosion prevention ingredient complete hydraulic crushing type mechanical boring machine |
| 09/24/2008 | CN101270661A Mine explosion-proof coal rock full hydraulic pulverizing development machine |
| 08/20/2008 | CN101245703A Four-drive traveller of development machine |
| 07/31/2008 | WO2008089904A1 Guide shoe for a roller-type loader and wear inserts for guide shoes |
| 07/30/2008 | CN201092856Y Driving machine travel unit |
| 07/24/2008 | DE102006032680B4 Walzenladeantriebsbaugruppe und Führungsschuh hierfür Roll loader drive assembly and guide shoe for this |
| 07/23/2008 | CN201090214Y Pedrail anti-skid device of driving machine |
| 07/22/2008 | CA2357274C Highwall mining system |
| 07/01/2008 | US7393059 Planing device and method for activating a planning device |
| 06/17/2008 | CA2356731C Highwall mining system |
| 06/11/2008 | CN201071722Y Pedrail self-propelled tunnel drilling rig hydraulic system |
| 06/11/2008 | CN201071721Y Pedrail type full hydraulic tunnel drilling rig |
| 06/11/2008 | CN201071720Y Drum-type open continuous miner |
| 04/29/2008 | US7364134 Optical fiber unit installation apparatus including a unit for preventing backward flowing of fluid |
| 04/23/2008 | CN201050367Y Tunneller boosting device |
| 04/15/2008 | US7357458 Boring rig |
| 03/05/2008 | CN201031701Y Walking means of mechanical boring machine |
| 03/05/2008 | CN201031699Y Circular saw type mechanical boring machine |
| 03/05/2008 | CN201031697Y Coal mine down-hole continuously mining machine |
| 02/20/2008 | CN201025035Y High tilt operation push assisting device for excavator |
| 02/20/2008 | CN201025031Y Short and small light excavator |
| 02/19/2008 | US7334057 Method and device for transmission of video data |
| 02/13/2008 | CN101122233A Caterpillar belt self-walking type tunnel drilling rig hydraulic system |
| 02/13/2008 | CN101122232A Track-mounted full-hydraulic tunnel drilling rig |
| 01/30/2008 | CN201013373Y Coal mine down-hole short-wall mining forklift |
| 01/23/2008 | CN201011303Y Motorized cart of coal mining machine |
| 01/23/2008 | CN201011302Y Coal mining machine |
| 01/23/2008 | CN101109282A Tunneling machine |
| 01/17/2008 | DE102006032680A1 Walzenladeantriebsbaugruppe und Führungsschuh hierfür Roll loader drive assembly and guide shoe for this |
| 01/17/2008 | DE102006031824A1 Gleitschuh und Gewinnungsmaschine hiermit Shoe and mining machine hereby |
| 01/16/2008 | CN101105127A Shearer-loader drive subassembly and guide shoe for it |
| 01/08/2008 | CA2488210C Auxilliary assembly for reducing unwanted movement of a hoist rope |
| 01/02/2008 | CN101096910A Plane box and drive station comprising a machine frame and the plane box |
| 12/25/2007 | US7311296 Conduit threading device and method |
| 12/19/2007 | CN200993015Y Excavator self-propelling device under large tilt angle condition |
| 12/19/2007 | CN200993014Y Small-sized rock drift fast impact drilling-loading machine |
| 12/19/2007 | CN200993012Y Self-sliding light-small excavator |
| 11/07/2007 | CN200971782Y 链条回旋装置 Chain gyroscopes |
| 10/18/2007 | WO2007117244A1 Systems and methods for controlling duct pressurization for cable installation |
| 10/16/2007 | US7282826 Driving device for sprocket wheels of chain drives |
| 10/10/2007 | CN101050703A Underground continuous tunnelling machine |
| 09/19/2007 | CN101037942A Small light mechanical boring machine |
| 08/15/2007 | CN101016839A Shortwall mining forklift in underground mine |
| 08/14/2007 | US7255406 Method for manufacturing track for auger boring machine |
| 06/19/2007 | US7231759 Link chain |
| 06/13/2007 | EP1706586A4 Alignment tool |
| 06/13/2007 | CN1981111A Innerduct guide tube assembly for fiber optic cable |
| 06/06/2007 | CN1975109A Coal cutting machine |
| 05/15/2007 | US7216848 Conduit attachment system for a cable puller |
| 05/15/2007 | US7216847 Installation tool |
| 04/24/2007 | US7207632 Shield system for coal mining |
| 04/04/2007 | CN2886052Y Hydraulic adjuster for rotary drilling machine |
| 02/22/2007 | DE102006030984A1 Kettenantriebs- oder Umlenkanordnung sowie dabei eingesetztes Kettenband und Kettenrad Chain drive or deflection arrangement and thereby inserted chain belt and sprocket |
| 02/21/2007 | CN1918362A Alignment tool |
| 02/21/2007 | CN1915773A Chain transmission or steering device and the chain or chain wheel used therein |
| 02/15/2007 | US20070034844 A Conduit Threading Device And Method |
| 02/13/2007 | US7175160 Raceway line puller and method of using same |
| 01/11/2007 | DE202005018614U1 Gleitschuh für Bergbaugewinnungsgerät Shoe for mining extraction device |
| 01/02/2007 | US7156373 Line retrieval system |
| 12/21/2006 | US20060284149 Apparatus and method for installing lines in conduits |
| 12/21/2006 | US20060284148 Apparatus and method for installing lines in conduits |
| 12/07/2006 | DE19819140B4 Vorrichtung zum Führen eines Kohlenhobels an der Förderrinne eines Kettenkratzförderers An apparatus for performing a coal plow on the conveyor trough of the scraper chain conveyor |
| 11/30/2006 | US20060267395 Coal face support in a mine |
| 11/15/2006 | EP1721061A2 Innerduct guide tube assembly for fiber optic cable |