Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21C - Mining or quarrying › E21C 27 - Machines which completely free the mineral from the seam
Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602)
12/1984
12/05/1984EP0023487B1 Rotary cutterhead for an earth boring machine
12/04/1984US4486051 Mining Machine
11/1984
11/20/1984US4483568 Advancing apparatus for a multi-unit mining machine
11/13/1984CA1177857A2 Bucket connection for a continuous excavating apparatus
11/07/1984EP0123725A1 Earth boring machine cutterhead and frame
10/1984
10/30/1984CA1177097A1 Shearer loader for the extraction of minerals
10/23/1984US4478457 Longwall mining apparatus for working thick seams
10/16/1984US4477119 Planing machine for underground mining with a cutter in the transition _range from longwall to drift, particularly for a simultaneously _mined drift
10/02/1984US4474411 Guides for mineral mining machines
10/02/1984US4474287 Variable length conveyor assembly
09/1984
09/18/1984US4471998 Cutter drum assembly for longwall mining machines
09/11/1984CA1174248A1 Continuous mining machine having contour cutters
08/1984
08/14/1984US4465320 Cutter drum assembly for longwall mining machines
08/14/1984US4465319 Integrated cutter, breaker and haulage drive gearcase
07/1984
07/19/1984WO1984002737A1 Cutter-loader for freeing essential mineral
07/04/1984EP0112408A1 Clearing plate for a shearer drum
07/03/1984USRE31622 Mining machine having rectangular thrust transmitting conveyor column
06/1984
06/12/1984US4453774 Driving arrangement for longwall mining machines
06/12/1984US4453771 Mineral winning plough with sword plate formed of plural parts
05/1984
05/29/1984US4451089 Coal-mining machine
05/22/1984US4449755 Thin seam mining machine
05/16/1984EP0108430A1 Continuous excavating apparatus
05/15/1984CA1167480A1 Longwall mining system
05/09/1984EP0108046A1 Cutting drum for a tunnelling machine and method of making it
05/01/1984US4445724 Cutter-loader apparatus having overhung shearer drum
04/1984
04/25/1984EP0106834A2 Device for conveying a fluid under pressure to a rotative part of a machine
04/24/1984US4444434 Continuous miner
04/10/1984US4441761 Mining machine
04/10/1984CA1165338A1 Mining machine
04/04/1984EP0105047A1 Cutting drum for tunneling machines
03/1984
03/27/1984US4438821 Mining machinery
03/27/1984US4438575 Continuous excavating apparatus
03/13/1984US4436345 Rotary boring head
03/06/1984US4435018 Mineral winning machine for "in web" mining system
12/1983
12/20/1983CA1159090A1 Continuous mining machine
11/1983
11/22/1983US4416643 Planar drive device
11/22/1983CA1157489A1 Continuous excavating apparatus
11/01/1983CA1156272A1 Mobile dual auger continuous mining machine with multiple movement capabilities
10/1983
10/11/1983CA1155144A1 Device for preventing ingress of dust through the annular gap between the cutting arm and the cutting head of a cutting machine
10/04/1983US4407546 Mining planer with pivotal tool holder
10/04/1983US4407545 Mine system
09/1983
09/27/1983CA1154467A1 Mine system
09/13/1983US4403809 Mineral winning plough
09/13/1983US4403808 Hauling and shaving plant
08/1983
08/30/1983CA1153025A1 Apparatus for extending and retracting the cutter bars of a boring type mining machine
08/23/1983US4400036 Corner-cutting mining assembly
08/09/1983CA1151680A1 Extensible and retractable rotor arm cutting assembly
08/02/1983US4396229 Mining machine with externally mounted drive means
07/1983
07/19/1983US4394053 Nozzle holder for cutter drum in longwall mining machinery
07/05/1983US4391472 Core eliminator for mining, road working or earth moving machinery
07/05/1983US4391471 Guides for mineral mining machines
06/1983
06/28/1983US4390212 Machine for mining thin seamed hard material in-situ between adjacent auger holes
06/28/1983US4390211 Continuous miner with cutter assembly attitude adjustment
06/21/1983US4389075 Device for preventing ingress of dust through the annular gap between the cutting arm and the cutting head of a cutting machine
06/21/1983US4389073 Apparatus for use with cutting drums of mineral machines
05/1983
05/31/1983CA1147355A2 Mining cutter bit holder and mounting assemblies
05/17/1983US4383715 Wall brush
05/10/1983US4382633 Longwall mining system
05/10/1983CA1146181A1 Device for preventing collision between part of the cutting arm and part of the loading ramp for a cutting machine
04/1983
04/20/1983EP0076799A1 Integrated cutter, breaker and haulage drive gearcase.
04/19/1983US4380354 Mining machine loading bin mounted on boom structure and method
03/1983
03/15/1983US4376553 Floor cutter bit
03/08/1983US4375904 Longwall mineral winning machine with adjustable cutting jet
02/1983
02/08/1983US4372618 Self-advancing mineral mining installation including tilting machine support
02/01/1983US4371210 Freely rotatable pick bit holder on rotary driven member and method
02/01/1983US4371209 Mining machine steering equipment
01/1983
01/25/1983CA1140167A1 Material fracturing apparatus
01/04/1983US4366990 Mechanism for guiding a coal planer on the trough of a scraper chain conveyor
01/04/1983US4366989 Coal planer control device
12/1982
12/14/1982US4363519 Continuous mining machine
12/07/1982US4362337 Tunneling system
12/07/1982CA1137125A1 Coal planer control device
12/07/1982CA1137124A1 Hauling and shaving plant
11/1982
11/23/1982US4360235 Cutting and chiseling assembly for mining machine and method performed thereby
10/1982
10/28/1982WO1982003654A1 Integrated cutter, breaker and haulage drive gearcase
09/1982
09/28/1982US4351565 Roof sensing control of shearer in longwall mining
09/28/1982US4351564 Device for preventing collision between part of the cutting arm and part of the loading ramp for a cutting machine
08/1982
08/31/1982US4346939 Cowl assembly for longwall mining machine
08/18/1982EP0057791A1 Fracturing apparatus
08/18/1982EP0057711A1 Mineral winning machine and system.
08/10/1982US4343514 Resonant tool driving system with gap
08/10/1982US4343368 Idle stroke braking unit for an impact device
08/05/1982WO1982002468A1 Material fracturing apparatus
07/1982
07/27/1982US4341424 Mobile dual auger continuous mining machine with multiple movement capabilities
07/13/1982US4339153 Apparatus for extending and retracting the cutter bars of a boring type mining machine
06/1982
06/22/1982CA1126301A1 Apparatus for drifting openings in hard rock
06/01/1982US4332421 Coupling devices for connecting a mineral mining machine to a drive chain
06/01/1982CA1124591A1 Percussive pneumatic impact device
05/1982
05/11/1982US4328996 Cutter drum support arm for longwall mining machine
05/05/1982EP0010105B1 Pavement planing machine
05/04/1982US4327946 Apparatus for controlling the position of a mineral mining machine
04/1982
04/20/1982CA1122234A1 Tools for mineral winning machines
04/06/1982US4323280 Remote controlled high wall coal mining system
04/06/1982CA1121393A1 Hydromechanical device with cutting and breaking heads, for recovery of mineral materials
03/1982
03/04/1982WO1982000680A1 Mineral winning machine and system
03/03/1982EP0046745A1 Cutting machine
02/1982
02/23/1982US4316635 Extensible and retraciable rotor arm cutting assembly
01/1982
01/26/1982US4312540 Continuous mining apparatus and method
01/12/1982US4310199 Cutter drum assembly for a continuous mining machine
12/1981
12/01/1981US4303277 Triangular shaped cutting head for use with a longwall mining machine
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