| Patents for E21C 31 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam (738) |
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| 06/03/1999 | WO1999027278A1 Drive line for chain conveyor |
| 04/20/1999 | US5895097 Continuously operating mining machine for simultaneous excavation and conveying of coal |
| 12/16/1998 | CN2300284Y High elasticity inner ventilation health care shoes |
| 06/11/1998 | WO1998025007A1 Device for damping vibrations in a part-face cutting machines |
| 11/06/1997 | DE19616931A1 Continuous working extraction machine |
| 09/17/1997 | CN1035893C Driving device winning machine and scraper conveyers used coal mining machine |
| 02/15/1996 | DE4428619A1 Swivel-arm for coal cutting machine |
| 08/15/1995 | CA2047829C Dragline rotating frame structure |
| 04/04/1995 | US5402879 Drive system for flight conveyors and method of operating same |
| 12/28/1994 | CN1096845A Arm of combined cutter loader |
| 07/13/1994 | CN1089330A Drive station for winning machines and scraper chain conveyors used in mining operations |
| 11/25/1992 | CN1019223B Ranging drum shearers |
| 09/01/1992 | US5143423 Drum assembly for a continuous miner |
| 04/28/1992 | US5108154 Drive arrangement for shearing drums |
| 04/07/1992 | US5102199 Continuous mining machine with a boom assembly providing different cutting heights and method of converting |
| 10/10/1991 | DE4011319A1 Asynchronous electric motor drive for mining machine - has single current regulator allowing individual or parallel operation of motors |
| 10/08/1991 | US5055092 Driving systems for driving endless chains or the like in mining apparatus |
| 08/08/1991 | DE4003084A1 Lubricating feed for swinging arm of coil cutter - has two separate reservoirs for grease and cooler for grease |
| 08/01/1991 | DE4002303A1 Electric motor and associated gears |
| 07/03/1991 | CN2080100U Rectangular chain connection ring |
| 05/29/1991 | EP0429051A1 Drum shearer |
| 03/26/1991 | US5002341 Mining apparatus for mechinized breaking-down of mineral materials, particularly coal, in underground mining operations |
| 11/07/1990 | CN2065237U Height adjustor with single rack and revolving rocker arm for coal machine |
| 09/11/1990 | US4955668 Drum cutter-loader equipped with an auxiliary drum |
| 07/31/1990 | US4944558 Drum cutter-loader for underground mining |
| 07/10/1990 | US4939949 Planetary overriding gearing and overriding driving for chain belts and the like, particularly for chain conveyors and chaindrawn mining machines |
| 05/31/1990 | DE3839613A1 Shearer loader fitted with cutting drums mounted on pivotable supporting arms |
| 05/01/1990 | US4921307 Mining apparatus for mechanized breaking-down of mineral materials, particularly coal, in underground mining operations |
| 04/19/1990 | DE3835049A1 Cutting drum connected in a rotationally locked manner to the output shaft butt of a reduction gear unit |
| 03/21/1990 | CN1007281B Gearing for mining machine |
| 03/01/1990 | DE3829225A1 Shearer loader |
| 02/22/1990 | DE3827693A1 Winch for a mining machine, in particular for a shearer loader in underground use |
| 02/06/1990 | US4898428 Power supply system for an underground mining machine |
| 12/26/1989 | US4889393 Drum cutter-loader for underground mining machine |
| 12/21/1989 | DE3821319A1 Drive unit for equipment at risk of overload, such as chain-driven face equipment in underground mining |
| 12/19/1989 | US4887867 Ranging drum shearers |
| 11/28/1989 | US4883323 Longwall mining machine for the mining of thick mineral seams |
| 11/16/1989 | DE3810374C1 Double-drum shearer |
| 05/09/1989 | US4828326 Shearer loader for underground mining operation |
| 04/18/1989 | US4822105 Double ended ranging drum shearer and method of controlling working height in mining face in use of the same |
| 04/05/1989 | CN1032213A Ranging drum shearers |
| 03/21/1989 | US4813530 Conveyor drive for miner |
| 03/15/1989 | EP0307213A1 Ranging drum shearers |
| 03/09/1989 | DE3729089A1 Shearer loader equipped with pivotable supporting arms for underground operation |
| 03/09/1989 | DE3729088A1 Shearer loader or selective-cut heading machine for underground operation |
| 05/03/1988 | US4741577 Double ranging drum cutter having load controller |
| 10/22/1987 | DE3712483A1 Antriebsanordnung fuer die schraemkoepfe einer schraemmaschine Drive arrangement for the cutting heads a cutting machine |
| 07/02/1987 | DE3545579A1 Machine body for a winning machine |
| 06/24/1987 | EP0226504A1 Shearing machine for mining |
| 06/04/1987 | DE3542239A1 Holder for the cable chain of a shearer |
| 05/19/1987 | CA1221989A1 Cutting machine |
| 03/04/1987 | CN85106080A Gearing for mining machine |
| 09/10/1986 | EP0063570B1 Torque transmitting device |
| 06/10/1986 | CA1205830A1 Mining machine |
| 05/20/1986 | US4589701 Cutting machine |
| 04/15/1986 | US4582363 Drive assembly for mining machine cutter drum |
| 04/15/1986 | US4581892 Adjustable fluid coupling |
| 01/14/1986 | US4563922 Torque transmitting device |
| 10/22/1985 | US4548444 Mineral winning plough |
| 08/20/1985 | CA1192064A1 Torque transmitting device |
| 07/30/1985 | US4531782 Mining equipment |
| 05/14/1985 | US4516338 Gimbal mounted on frame with heavy metal plate sides |
| 04/30/1985 | US4514012 Excavatory machine for use in coal and other mining opertions |
| 02/06/1985 | EP0076799B1 Integrated cutter, breaker and haulage drive gearcase |
| 12/04/1984 | US4486051 Mining Machine |
| 10/30/1984 | CA1177097A1 Shearer loader for the extraction of minerals |
| 09/11/1984 | US4470636 Mining machine excavator drum having liquid spray control |
| 08/14/1984 | US4465319 Integrated cutter, breaker and haulage drive gearcase |
| 06/12/1984 | US4453774 Driving arrangement for longwall mining machines |
| 05/16/1984 | EP0108430A1 Continuous excavating apparatus |
| 05/08/1984 | US4446765 Torque transmitting device |
| 03/27/1984 | US4438575 Continuous excavating apparatus |
| 11/22/1983 | CA1157489A1 Continuous excavating apparatus |
| 10/04/1983 | US4407545 Mine system |
| 09/27/1983 | CA1154467A1 Mine system |
| 06/28/1983 | US4390212 Machine for mining thin seamed hard material in-situ between adjacent auger holes |
| 04/20/1983 | EP0076799A1 Integrated cutter, breaker and haulage drive gearcase. |
| 01/31/1983 | EP0063570A4 Torque transmitting device. |
| 11/30/1982 | US4361219 Swivelling arrangements |
| 11/03/1982 | EP0063570A1 Torque transmitting device. |
| 10/28/1982 | WO1982003654A1 Integrated cutter, breaker and haulage drive gearcase |
| 08/31/1982 | US4346939 Cowl assembly for longwall mining machine |
| 04/15/1982 | WO1982001150A1 Torque transmitting device |
| 01/12/1982 | US4310199 Cutter drum assembly for a continuous mining machine |
| 06/02/1981 | US4270803 Cutter drum drive assembly for canted end sections |
| 05/26/1981 | US4270072 Current supply circuit of cutting drum motors on a mining machine |
| 05/26/1981 | US4269448 Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded |
| 05/20/1981 | EP0028930A1 Continuous excavating apparatus |
| 03/03/1981 | US4253705 Continuous mining machine having a boom member with a fixed material dislodging means |
| 02/03/1981 | US4248483 End cutting unit for a mining machine |
| 01/20/1981 | US4245526 Mining machine haulage transmission |
| 11/18/1980 | CA1089886A1 Low profile mining machine |
| 10/14/1980 | CA1087642A1 Continuous boring or cutting machine |
| 09/30/1980 | US4225189 Continuous mining machine and cutter drum drive therefor |
| 09/23/1980 | US4223950 Longwall cutting machines with drum moved by plural power means |
| 07/29/1980 | CA1082748A1 Low profile mining machine |
| 06/03/1980 | US4205881 Machine and method for mining hard material in-situ between adjacent auger holes |
| 05/27/1980 | CA1078416A1 Swivel mechanism for kerf-cutting machines |
| 02/26/1980 | US4190296 Apparatus for interconnecting segmented cutter drums of a rotary cutter mechanism |
| 02/19/1980 | US4189188 Drum cutter mining machine |