Patents for E21C 29 - Propulsion of machines for slitting or completely freeing the mineral from the seam (839) |
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08/20/1996 | US5547261 Movable rack system for longwall conveyor means |
07/04/1996 | DE4446457A1 Long face conveyor with travelling machine track esp. for underground coal mines |
06/05/1996 | DE4446454A1 Movable toothed rack system for mining conveyor with drive shaft |
05/15/1996 | CN2227196Y Anti-backward and anti-skid apparatus for coal-winning machine cadle torring clamp on high-grade ordinary recovery working face |
04/11/1996 | DE4435842A1 Longwall face machine for underground mining |
01/11/1996 | DE4423925A1 Drive and guide section for mining equipment esp. rotary trench cutters |
12/06/1995 | CN1112982A Coal planning apparatus |
11/22/1995 | CN1112189A Rail for coal carrying machine assembled on chain scraper conveyor |
10/26/1995 | DE4407115C1 Plane for hewing coal |
10/19/1995 | DE4413321A1 Endless drive chain tensioning system |
10/12/1995 | DE4412002A1 Narrow frontage machine for suspended mining of inclined coal seams |
06/27/1995 | US5426968 Arrangement for determining the tension in a chain used in a mineral mining installation |
01/04/1995 | CN1027299C Guiding device of mining machines |
12/01/1994 | DE4322913A1 Face conveyor with a drive shaft arranged on the face side for the winning machine |
09/22/1994 | DE4332379C1 Pull chain |
09/15/1994 | DE4307447A1 Rack for moving a winning machine in underground mining |
12/21/1993 | US5272289 Scraper chain conveyor |
09/16/1993 | DE4207530A1 Drive chain tension measurement appts. - contains pressure measurement element on gear wheel in gear box, non-removable chain wheel bearing |
09/14/1993 | US5244256 Haulage chain for a mineral winning installation |
02/03/1993 | CN1068625A Inner grooving tool for gravity type big diameter hole |
12/15/1992 | US5171065 Mineral mining installation with chain-tensioning system |
12/01/1992 | US5167437 Mechanisms for drawing a chain into or through a channel of a chain guide |
11/10/1992 | US5161858 Arrangement for guiding a cutting machine or similar mining machine at the conveyor trough of a drag-chain conveyor |
11/05/1992 | DE4114425A1 Chain-driven planer for underground coal-face working - equalises power consumption of main and auxiliary motors by load-dependent adjustment of chain wheel speeds |
07/22/1992 | CN1062951A Guiding device of mining machines |
07/21/1992 | US5131723 Guide for a hewing machine mounted on a conveyor |
02/06/1992 | DE4024830A1 Torque control for chain drive - has two asynchronous drive motors with small chain motor acting as tension drive |
01/16/1992 | DE4029635A1 Furnished profile for scraper chain conveyor |
12/10/1991 | CA1292893C Bi-directional torque transmission unit |
06/27/1991 | DE3942928A1 Drive chain for mining machine feed - has alternate long and short links with elongated holes in short links |
03/26/1991 | US5002341 Mining apparatus for mechinized breaking-down of mineral materials, particularly coal, in underground mining operations |
03/20/1991 | CN1012093B Walking hydraulic impulsive coal cutter |
03/19/1991 | CA1281709C Handle operated wire puller |
02/28/1991 | DE3927892A1 Adjusting chain tension of coal plough - involves computerised measuring and comparison with notional values, and using data for adjustments |
02/19/1991 | US4993779 Element to form a rack for a mining machine haulage system |
01/30/1991 | CN2070361U Quantity propulsion control device for coal plough |
11/07/1990 | CN2065237U Height adjustor with single rack and revolving rocker arm for coal machine |
08/01/1990 | CN1009018B Guide strip mounted on conveyor for coal face |
07/24/1990 | US4943120 Force transmitting housing for longwall mining machine |
07/19/1990 | DE3901172A1 Bracket for mounting rack-bar sections |
05/23/1990 | DE3838862A1 Walzenlader Shearer |
05/01/1990 | US4921307 Mining apparatus for mechanized breaking-down of mineral materials, particularly coal, in underground mining operations |
02/15/1990 | DE3827399A1 Bracket for mounting the rack-bar sections serving to move a shearer loader |
02/06/1990 | US4898428 Power supply system for an underground mining machine |
01/30/1990 | US4896920 Drum-cutter mining machine |
12/19/1989 | US4887991 Drive assemblies for chain-driven mining machinery |
12/07/1989 | DE3817995A1 Shearer loader with two hydraulic winches |
11/30/1989 | DE3818212A1 Electric drive system for a chain-driven winning plough for use in underground winning operations |
09/14/1989 | DE3806659A1 Shearer loader with two hydraulic winches |
08/31/1989 | DE3805049A1 Shearer loader equipped with two winches |
08/03/1989 | DE3801931A1 Method and circuit for operating a shearer loader hauled by roadway winches |
07/25/1989 | US4850648 Gear rack for driving or guiding a drum cutter loader |
07/12/1989 | CN1033859A Walking hydraulic impulsive coal cutter |
07/04/1989 | US4844548 Haulage unit of a coal-getting machine |
06/22/1989 | DE3742342A1 Drive for chain-operated operating means with separate load compensation and overload protection |
06/08/1989 | DE3740020A1 Short-front machine for working or driving purposes |
05/24/1989 | DE3741762A1 Item of coal face equipment, in particular winning machine |
05/24/1989 | DE3738438A1 Shortwall machine for winning and driving purposes |
04/13/1989 | DE3733336A1 Drive arrangement, provided with overload protection and load compensation system, for chain drives, in particular chain conveyors and chain-hauled winning machines |
04/11/1989 | US4819989 Propulsion systems for mineral mining machines |
03/30/1989 | DE3730306A1 Arrangement for the flexible connection of the pans of a face conveyor which are equipped with a side spill plate and a rack bar |
03/21/1989 | US4813748 Mining machinery haulage system |
03/21/1989 | US4813747 Rack assembly for advancing a winning machine |
02/23/1989 | DE3726644A1 Zahnstange fuer am strebfoerdermittel gefuehrte gewinnungsmaschinen Rack for at strebfoerdermittel guided extraction machine |
02/09/1989 | DE3725244A1 Rack bar for a winning machine in underground mining |
02/02/1989 | DE3724266A1 Overload protection device for plough systems |
12/01/1988 | DE3716668C1 Mit einer Winde ausgeruesteter Walzenlader des Untertagebetriebes Using a jack equipped shearer of underground operation |
11/17/1988 | DE3714430A1 Anti-locking means for plough systems |
11/08/1988 | US4782940 Captivated block and strap link chain |
09/27/1988 | US4773710 Rack device for advancing a mining machine |
09/06/1988 | US4768835 Advancing system for coal winning machine |
08/18/1988 | DE3703385A1 Extraction machine for underground mining, especially roller loader |
08/18/1988 | DE3703384A1 Rack or lantern rack for the advance of the roller loader used underground |
07/28/1988 | DE3700489C1 Machine track for winning machines in underground use |
06/09/1988 | DE3641715A1 Machine track for shearer loaders in underground working |
04/26/1988 | US4739875 Coal planing chain and feed device |
04/14/1988 | DE3634789A1 Drive for heavy-duty-starting machines in mining |
02/25/1988 | DE3628283A1 Rack bar for guiding and running a shearer loader movable on or over a face conveyor |
02/24/1988 | CN86105576A Captivated block and strap link chain |
02/11/1988 | WO1988001011A1 Feed mechanism for cutting-loading machine |
01/14/1988 | DE3623387A1 Rack, preferably lantern rack, for the travel and advance of an extraction machine of underground mining |
01/05/1988 | CA1231087A1 Guide roller for feeding electrical wire into conduit |
12/10/1987 | DE3618854A1 Longwall shearing machine for underground mining, in particular disc shearer, with a toothed wheel which produces its advancing motion and engages in a lateral toothed rack |
07/28/1987 | US4682678 Gearing units for use with mining equipment |
04/07/1987 | CA1220233A1 Steering of mining machines |
03/12/1987 | DE3531929A1 Chain-hauled shearer loader |
03/10/1987 | US4648659 Method and hydraulic system for controlling supply of fluid to combine for extracting minerals |
02/19/1987 | DE3528509A1 Drive underframe for supporting the drive head of a face conveyor in the roadway |
02/17/1987 | US4643482 Steering of mining machines |
01/20/1987 | US4637268 Planer drive |
01/06/1987 | US4633723 Chainless feed system of mining cutterloader |
01/02/1987 | DE3522163A1 Holding device for the cutter cable of a winning machine in underground mining |
12/30/1986 | EP0206610A1 Captivated block and strap link chain |
05/10/1986 | CN85105757A Tunnel hoist |
08/20/1985 | US4536036 Pinless haulage drive chain and rack-form link for use seriatim in forming same |
06/25/1985 | US4524859 Rail assembly for underground coal-getting machines |
05/14/1985 | US4516809 Device for interconnecting two sections of a longwall mining machine track |
05/07/1985 | US4515410 For a mine winning machine |
05/07/1985 | US4515409 Mining machine |
04/30/1985 | US4514011 Power and liquid supply system for mining machines |