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