| Patents for E21C 47 - Machines for obtaining, or the removal of, materials in open-pit mines (773) |
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| 05/01/2001 | US6224163 Milling roller module for a surface miner |
| 01/18/2001 | DE19931969A1 Device to reduce loss of released goods during uptake and intermediate conveying for an open mining device with a milling roller and a discharge band; has locking rings to form simple labyrinth |
| 01/10/2001 | CN1279339A Method for building salina |
| 01/09/2001 | US6173215 Method for determining a desired response to detection of an obstacle |
| 12/20/2000 | CN2411341Y Multiway splitting wedge for rock |
| 12/13/2000 | CN2410419Y Simple shovel loader |
| 10/12/2000 | WO2000060018A1 A method of suppressing dust in a mine using an alkyl polyglucoside composition |
| 08/16/2000 | CN1263203A 自动采石机 Automatic quarrying machines |
| 08/15/2000 | US6102483 Process for preparing the exposed surface of a rock formation to permit the extraction of parallelepiped shaped blocks of rock ready for final processing, and process and extractor for extracting such blocks |
| 06/22/2000 | CA2256802A1 Excavation apparatus for mining layers of earth |
| 06/21/2000 | EP1010818A1 Extraction tool for the extraction of mining goods |
| 06/15/2000 | DE19941799A1 Continuous surface miner for mineral raw materials in sedimentary layers has three-track running gear connected by substructure frame with steering actuator, and superstructure with drive, cutter, and loading conveyor |
| 06/13/2000 | CA2112813C Rotary cutter for extracting hard rock |
| 05/25/2000 | DE19941800A1 Drive and propulsion mechanism for cutter roll in opencast mining machine, has multi-section roll with drive units at both ends using internal roll flanges and external lateral supports |
| 05/24/2000 | CN1052777C Vertically fixed-shaft steering method for L-shape strip-area working face |
| 05/16/2000 | US6064926 Method and apparatus for determining an alternate path in response to detection of an obstacle |
| 05/11/2000 | DE19941802A1 Pick-up chute for open cast mining milling roller has shield board enclosing milling roller and with lower stripping edge and opening forming guide tunnel for transferring material to discharge belt |
| 04/12/2000 | CN2373568Y Rock cutting machine |
| 01/19/2000 | CN1241677A Method for equalizing bulk materials and apparatus for implementing the same method |
| 10/20/1999 | CN1232130A Tails dyke and ash dyke dual-dyke safety embanking method |
| 06/24/1999 | DE19859181A1 Method of determining desired response to detection of obstruction in path of mobile machine |
| 06/10/1999 | DE19856610A1 Method to plan alternative route, e.g. for fleet of all-terrain mining operations trucks, on detection of obstruction |
| 06/02/1999 | CN2321942Y Automatic combined sand-production vehicle |
| 05/19/1999 | CN1216799A Mining mechanism for mine |
| 05/06/1999 | DE19748761A1 Coal extraction machine |
| 04/06/1999 | US5890304 Device for lifting, lowering and leveling booms of strip mining equipment |
| 02/26/1999 | CA2243742A1 Power mining shovel brake apparatus and method of retrofitting |
| 02/25/1999 | WO1999008947A1 Control system for overburden discharge |
| 02/11/1999 | DE19736390C1 Horizontal support table for open cast earth working |
| 02/10/1999 | CN2307103Y Multifunction machinery for quarrying walling granite |
| 01/26/1999 | US5864060 Method for monitoring the work cycle of mobile machinery during material removal |
| 01/20/1999 | CN2304749Y Small-size sand dregder |
| 01/12/1999 | US5857274 Method of operating a bucket wheel excavator |
| 10/08/1998 | WO1998044205A1 Method for monitoring the work cycle of mobile machinery during material removal |
| 10/08/1998 | CA2253475A1 Method for monitoring the work cycle of mobile machinery during material removal |
| 09/23/1998 | CN1193685A Stone extracting process and special tools therefor |
| 09/22/1998 | US5810449 Cutting drum for an open cast apparatus performing its winning action in both directions of travel |
| 06/10/1998 | CN2283734Y Amphibious gold extracting and selecting device |
| 05/20/1998 | DE19710024C1 Arrangement of rotary mechanism for loading jib of mining machine pivotable around vertical axis |
| 05/06/1998 | CN2280774Y Centrifugal pump type sand dredging-out device |
| 04/02/1998 | DE19651979C1 Running gear for mining extraction cutter |
| 03/24/1998 | US5730501 Continuous track mounted, self propelled open cast mining apparatus |
| 02/04/1998 | CN1172196A Bucket dredger attack method |
| 01/29/1998 | DE19628420A1 Method for material breakdown |
| 01/15/1998 | CA2210420A1 Method of operating a bucket wheel excavator |
| 12/17/1997 | CN2270806Y Salt-field machinery |
| 11/27/1997 | DE19620536A1 Protective hood for milling cutter |
| 10/15/1997 | CN1162057A Vertically fixed-shaft rotating mode for L-shape strip-area working face |
| 10/01/1997 | CN1160808A Special-shaped granite excavating technology |
| 09/18/1997 | DE19610217A1 Vertical lifting system for solid material |
| 06/19/1997 | DE19547170A1 Milling roller with extraction equipment for mining work |
| 06/17/1997 | CA2192523A1 Cutting drum for an open cast winning apparatus performing its winning action in both directions of travel |
| 06/05/1997 | DE19541867C1 Device for lifting, lowering and levelling out booms of open-pit mining |
| 04/29/1997 | CA2064205C Method and apparatus for cutting erosive materials using high pressure water means |
| 02/12/1997 | EP0482019B1 Method and apparatus for cutting erosive materials using high pressure water means |
| 12/11/1996 | CN2242138Y Machine for digging, conveying and grading granular material |
| 12/04/1996 | CN1137092A Open cast mining apparatus |
| 08/22/1996 | DE19505042A1 Open cast mining machine with cutter drum |
| 07/31/1996 | CN2232077Y Multifunctional sand pump |
| 04/27/1996 | CA2169048A1 Open cast mining apparatus |
| 04/10/1996 | CN2224281Y Multi-tableplate vibration ore-drawing machine |
| 11/29/1995 | CN2213845Y Indicating device of deep penetration perforation equipment |
| 10/11/1995 | CN2209720Y Stone explosive cutter |
| 05/24/1995 | CN2198387Y Rock cutting bomb |
| 04/25/1995 | US5409298 Open cut mining apparatus |
| 04/11/1995 | US5404988 Mobile connecting belt bridge for open pit mining |
| 01/25/1995 | CN2188221Y Electric main command signal preset control switchgear for excavator |
| 01/11/1995 | CN1097237A Splitting method for quarrying stone material and its splitter |
| 01/03/1995 | US5378049 Rotary cutter for extracting hard rock |
| 10/25/1994 | CA2015719C Continuously operating open-cast mining device with a cylindrical breaking tool |
| 08/31/1994 | CN2175828Y Tension splitter for mining stone material |
| 07/26/1994 | US5332293 Apparatus for cutting erosive materials using high pressure water device |
| 04/27/1994 | EP0593675A1 Method and device for the extraction of blocks from a rock formation |
| 03/17/1994 | CA2106162A1 Mining apparatus |
| 10/20/1993 | CN2144177Y Force isostatic adjustment device for multiple steel cables |
| 09/02/1993 | WO1993016945A1 Novel conveyor belt bridge for open-cast mining |
| 09/02/1993 | CA2108881A1 Mobile connecting belt bridge for open cast mining |
| 08/26/1993 | DE4205557A1 Mobile verbindungsbandbruecke fuer den tagebau Mobile verbindungsbandbruecke for the tagebau |
| 06/09/1993 | DE4139818A1 Clearing slag heaps from opencast or underground mining - requires installation of artificial abutment on upper part of heap as anchor for mining machinery. |
| 05/11/1993 | US5209311 Drill string component |
| 02/04/1993 | WO1993002274A1 Method and device for the extraction of blocks from a rock formation |
| 02/04/1993 | CA2113543A1 Method and device for the extraction of blocks from a rock formation |
| 01/21/1993 | WO1993001392A1 Rotary cutter for extracting hard rock |
| 11/18/1992 | CN2122233U Pipeline testing pressure sampler with anti-theft and antifreezing function |
| 11/04/1992 | CN2120664U Freeze rock breaker |
| 10/06/1992 | US5152583 Continuous-operation extraction machinery for strip mining with a cylindrical extractor |
| 08/12/1992 | EP0482019A4 Method and apparatus for cutting erosive materials using high pressure water means |
| 07/15/1992 | EP0304421B1 Open-cut mining cutter |
| 05/20/1992 | EP0486449A1 Drill string component |
| 04/29/1992 | EP0482019A1 Method and apparatus for cutting erosive materials using high pressure water means. |
| 03/17/1992 | CA1297504C Side swinging, twin-cutter overburden excavator |
| 03/03/1992 | US5092659 Continuous track-mounted, self-propelled open-cast mining machine |
| 11/12/1991 | CA2041980A1 Continuously operating open-cut mining device with a cylindrical breaking tool |
| 09/10/1991 | CA1288735C Dragline apparatus |
| 07/02/1991 | CA1285519C Bunker for surface mines |
| 04/03/1991 | EP0419472A1 Process and device for quarrying and open-cast mining |
| 03/28/1991 | DE4017107A1 Continuously operating open-cut mining device |
| 01/22/1991 | WO1991001432A1 Method and apparatus for cutting erosive materials using high pressure water means |
| 01/16/1991 | CN1011252B Improved dragline apparatus |
| 01/10/1991 | DE3920011A1 Winning equipment in mine - is mounted on self-propelled tracked vehicle and has toothed milling roller and conveyor belt system |