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)
11/1981
11/03/1981US4298232 Mining machine
10/1981
10/27/1981US4296856 Material gathering device for a mining machine
10/06/1981CA1110283A1 Method and apparatus for mining minerals, especially coal formations
09/1981
09/22/1981US4290653 Coal mining machine cutter with noise suppressant and flame resistant layer
09/22/1981US4290652 Machine for the cutting of rocks in underground works
09/22/1981US4290648 Mining apparatus
09/08/1981US4288125 Mining apparatus having an improved coupling assembly
09/01/1981US4286823 Conveyor and guide assembly
08/1981
08/11/1981US4282937 Hammer
07/1981
07/28/1981US4280735 Non-rotary mining cutter with recessed nozzle insert
07/28/1981US4280733 Asymmetric mineral mining plough
07/21/1981US4279445 Longwall mining installation having stable-hole plough
07/21/1981US4279443 Mining apparatus
07/14/1981US4278296 Coal mining drum with adjustable linier edge cutters
07/14/1981US4278294 Guide-rail assembly for longwall mining apparatus
07/14/1981US4278293 Apparatus for advancing a low-height drift through a subterranean structure
07/14/1981US4278137 Apparatus for extracting minerals through a borehole
06/1981
06/30/1981US4275927 Mineral mining plough with worm adjustable roof cutter
06/17/1981EP0023487A4 Rotary cutterhead for an earth boring machine.
06/16/1981US4273383 Mineral winning machines
06/09/1981US4272130 Mineral mining installation
06/09/1981US4272129 Mineral mining installation
06/02/1981US4270803 Cutter drum drive assembly for canted end sections
05/1981
05/20/1981EP0028930A1 Continuous excavating apparatus
05/19/1981CA1101449A1 Continuous miner with improved roof-to-floor anchoring canopy units for advancing and turning machine and installing roof bolts
05/13/1981EP0028593A1 Device to preclude physical contact between the cutter boom and the gathering arm of a cutting machine
05/12/1981US4266828 Apparatus on drum shearer for cutting through safety wall in long wall mining
04/1981
04/29/1981EP0027789A1 Conveyor for tunnelling machines
04/28/1981US4264106 Auger mining machine
04/21/1981US4262964 System for detecting interfaces between mineral seams and the surrounding earth formations
04/08/1981EP0026439A2 Cutter for a partial-cut driving machine
04/07/1981US4260195 Contour miner
03/1981
03/17/1981CA1097701A1 Gauging apparatus and method, particularly for controlling mining by a mining machine
03/17/1981CA1097700A2 Low profile mining machine
03/10/1981US4254993 Mining apparatus
03/03/1981US4253705 Continuous mining machine having a boom member with a fixed material dislodging means
03/03/1981CA1096897A1 Mineral winning machines
02/1981
02/17/1981US4251112 Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine
02/17/1981US4251110 Mineral mining installation
02/11/1981EP0023487A1 Rotary cutterhead for an earth boring machine.
02/03/1981US4248483 End cutting unit for a mining machine
02/03/1981US4248482 Curved conveyor section guide assembly
01/1981
01/27/1981US4247149 Mechanically actuated impact mechanism
01/07/1981EP0021987A1 Machine for driving underground galleries
01/06/1981US4243268 Mineral mining installation with planer and jet carrier
12/1980
12/16/1980US4239290 Hydromechanical planer with cutting and breaking heads
12/16/1980US4239289 Maneuverable full face miner
11/1980
11/18/1980US4234235 Rotary cutterhead for an earth boring machine
11/18/1980US4234233 Chain driven cutting bucket for use in deep mining
11/18/1980CA1089885A2 Low profile mining machine
10/1980
10/21/1980US4229046 Tool driving apparatus and method
10/07/1980US4226476 Continuous miner with improved roof-to-floor anchoring canopy units for advancing and turning machine and installing roof bolts
09/1980
09/30/1980US4225189 Continuous mining machine and cutter drum drive therefor
09/23/1980US4223950 Longwall cutting machines with drum moved by plural power means
09/02/1980US4220371 Method of mineral mining plough operation in two directions of varying depth cut
08/1980
08/12/1980US4216999 Machine for mining tar sands having rearwardly directed exhaust related to conveyor trough
08/12/1980CA1083614A1 Apparatus for disintegrating and removing layers of earth, especially under water
08/07/1980WO1980001587A1 Rotary cutterhead for an earth boring machine
07/1980
07/15/1980US4212497 Liquid discharge apparatus for a shearing-loader type mining machine
07/15/1980CA1081719A1 Method and apparatus for a combined hydraulic- mechanical recovery of extremely hard mineral raw material
07/01/1980CA1080757A1 Automatic face transfer linear cutting rotary head continuous mining machine
07/01/1980CA1080756A1 Tunneling machines and other cutting machines
06/1980
06/24/1980US4209199 Mineral mining machines
06/17/1980CA1079756A1 Mining method and apparatus
06/12/1980WO1980001188A1 Mechanically actuated impact mechanism
06/10/1980US4206947 Percussive slot cutter
06/03/1980US4205881 Machine and method for mining hard material in-situ between adjacent auger holes
06/03/1980CA1078882A1 Drag bit excavation
05/1980
05/27/1980CA1078417A1 Linear cutting rotary head continuous mining machine
05/27/1980CA1078416A1 Swivel mechanism for kerf-cutting machines
04/1980
04/30/1980EP0010105A1 Pavement planing machine.
04/29/1980US4200335 Gauging apparatus and method, particularly for controlling mining by a mining machine
04/22/1980US4199194 Control means for a coal plough
04/15/1980US4198098 Mineral winning installations
04/08/1980US4196934 Shortwall mining machine
04/08/1980US4196933 Safety wall cutting through method employed in long wall mining
03/1980
03/25/1980US4194790 Rock cutting tip inserts
02/1980
02/26/1980US4190296 Apparatus for interconnecting segmented cutter drums of a rotary cutter mechanism
02/26/1980US4190295 Mining machines with cutter chain tensioning means
02/19/1980US4189188 Drum cutter mining machine
02/19/1980US4189187 Mineral mining planer having pivoted floor cutter carrier
02/05/1980US4186969 Apparatus for controlling the position of a mining machine
02/05/1980CA1071247A1 Take-up for mining machine trim chain
02/05/1980CA1071246A1 Gathering head
01/1980
01/29/1980US4185876 Plural spaced cutter drums on pivotable elongate arm with loading means in the space
01/29/1980US4185874 Longwall installation with carrier for water and electric supply and propulsion rock
01/09/1980EP0006656A1 Device for winning minerals via a borehole
01/01/1980US4181363 Mining method and mining machine for cutting away hard mineral materials
12/1979
12/25/1979US4180291 Mineral mining installation
12/18/1979US4179161 Plough for winning material from a mineral face
12/11/1979US4178040 Movable mining planer with direction responsive adjustable cutter depth
12/04/1979US4176884 Anchoring apparatus for a mining installation
11/1979
11/27/1979CA1067109A1 Locking device for mining machine trim chain
10/1979
10/09/1979US4170383 Tunneling machines and other cutting machines
10/09/1979CA1064060A1 Percussive tool mount
10/02/1979CA1063626A1 Full face miner
09/1979
09/11/1979US4167293 Sprocket tightener
09/04/1979US4166652 Mining machine, particularly for the working of low mine seams
09/04/1979CA1061811A1 Method for cutting minerals and cutting machine
08/1979
08/23/1979WO1979000563A1 Pavement planing method and apparatus
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