Patents
Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629)
02/1984
02/01/1984EP0099791A2 Equipment for extraction of stone,marble or granite,especially from quarries and for roughing and squaring it
01/1984
01/31/1984US4428619 Rotary cutter heads for mining machines
01/17/1984CA1160648A1 Mining cutting drum and method of laying dust
12/1983
12/21/1983EP0096585A1 An earth working machine
10/1983
10/25/1983US4411475 Cutting drum
09/1983
09/27/1983US4406500 Cutting assembly including expanding wall segments of auger
07/1983
07/19/1983US4394053 Nozzle holder for cutter drum in longwall mining machinery
06/1983
06/21/1983US4389073 Apparatus for use with cutting drums of mineral machines
06/21/1983US4389071 Enhancing liquid jet erosion
05/1983
05/10/1983CA1146183A1 Tool fastening
05/04/1983EP0078041A2 Cutter chain for a stone cutting machine
03/1983
03/08/1983US4375904 Longwall mineral winning machine with adjustable cutting jet
02/1983
02/03/1983WO1983000357A1 A method of and apparatus for hydraulic mining
02/01/1983US4371210 Freely rotatable pick bit holder on rotary driven member and method
01/1983
01/26/1983EP0070506A2 Cutter-jib of a cutting machine
01/18/1983US4368925 Cutter drum assembly for a longwall mining machine
11/1982
11/09/1982US4358161 Mining equipment
10/1982
10/13/1982EP0062111A2 Enhancing liquid jet erosion
08/1982
08/31/1982US4346939 Cowl assembly for longwall mining machine
08/03/1982US4342486 Cutter bit holder
05/1982
05/11/1982US4328996 Cutter drum support arm for longwall mining machine
04/1982
04/20/1982CA1122234A1 Tools for mineral winning machines
04/06/1982CA1121393A1 Hydromechanical device with cutting and breaking heads, for recovery of mineral materials
02/1982
02/16/1982CA1118459A1 Process of and an arrangement for mining
01/1982
01/12/1982US4310199 Cutter drum assembly for a continuous mining machine
12/1981
12/15/1981CA1114405A1 Method and device for breaking hard compact material such as rock
12/01/1981US4303277 Triangular shaped cutting head for use with a longwall mining machine
11/1981
11/10/1981CA1112255A1 Arrangement for discharging liquid medium under high pressure
10/1981
10/27/1981CA1111455A1 Mining equipment
10/06/1981CA1110283A1 Method and apparatus for mining minerals, especially coal formations
09/1981
09/15/1981US4289275 Method and device for breaking a hard compact material
07/1981
07/28/1981US4280735 Non-rotary mining cutter with recessed nozzle insert
07/21/1981CA1105504A1 Means for driving the back walls of a bucket excavator
07/14/1981US4278296 Coal mining drum with adjustable linier edge cutters
07/07/1981US4277105 Conveyor system for a continuous mining machine
06/1981
06/16/1981US4273383 Mineral winning machines
06/09/1981CA1102828A1 Mining unit of coal combines
05/1981
05/19/1981US4268089 Mounting means for pick on mining drum vane
05/12/1981US4266830 Auger construction providing reduced noise
05/05/1981US4265487 High pressure water jet mining machine
05/05/1981CA1100555A1 Method of making high velocity liquid jet
03/1981
03/31/1981US4258957 Cutting machine nose shoe
03/17/1981CA1097700A2 Low profile mining machine
03/10/1981US4254995 Process of and an arrangement for mining
03/03/1981US4253705 Continuous mining machine having a boom member with a fixed material dislodging means
02/1981
02/17/1981US4251112 Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine
02/17/1981US4251110 Mineral mining installation
02/10/1981US4249779 Rotating cutting drum having tapered and curved conveying surface
02/10/1981CA1095542A1 Apparatus for cutting hard earth formations
02/03/1981CA1095093A1 Method and device for breaking a hard compact material
01/1981
01/13/1981US4244626 Rotary cutter for gouging out ore from mine faces or the like
01/13/1981US4244625 Apparatus for cutting hard earth formations
01/13/1981US4244521 Arrangement for discharging liquid medium under high pressure
01/06/1981US4243268 Mineral mining installation with planer and jet carrier
12/1980
12/23/1980US4240664 Hydraulic jet cutting tool and method
12/16/1980US4239290 Hydromechanical planer with cutting and breaking heads
11/1980
11/25/1980CA1090378A1 Method and device for breaking a hard compact material
11/18/1980CA1089885A2 Low profile mining machine
11/11/1980US4232904 Method and apparatus for deep mining using chain driven in fixed direction
10/1980
10/07/1980US4226475 Underground mineral extraction
09/1980
09/30/1980US4225190 Mining drum with cutting and shearing bits on conical ring
09/30/1980US4225186 Horizontal mining machine and method of slot mining
09/09/1980US4221271 Water jet cutting nozzle transition section
09/03/1980EP0014776A1 Rock cutter jib
08/1980
08/26/1980US4219239 Mining auger
08/19/1980US4218095 Mining unit of coal combines
08/12/1980US4216906 Method of making high velocity liquid jet
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
05/1980
05/27/1980US4204715 Method and device for breaking a hard compact material
04/1980
04/15/1980US4198098 Mineral winning installations
04/15/1980CA1075728A1 Push pull mining system
04/08/1980US4196935 Equipment for laying elongate material
04/01/1980US4195885 Method and device for breaking a hard compact material
02/1980
02/26/1980US4190296 Apparatus for interconnecting segmented cutter drums of a rotary cutter mechanism
02/26/1980CA1072587A1 Method and device for breaking a hard compact material
01/1980
01/01/1980US4181363 Mining method and mining machine for cutting away hard mineral materials
12/1979
12/04/1979US4176883 Oscillating liquid jet system and method for cutting granite and the like
10/1979
10/30/1979US4172616 Cutting head with self-contained power source
09/1979
09/11/1979US4167293 Sprocket tightener
09/11/1979US4167292 Method of using a low temperature freezing softening and abrasion fluid
07/1979
07/31/1979CA1059538A2 Method and apparatus for in-cutting and out-cutting during coal mining
07/10/1979US4160566 Mining apparatus
05/1979
05/22/1979CA1055054A1 Cutting chains for mining machines
04/1979
04/24/1979CA1053268A1 High pressure pulsed water jet apparatus and process
03/1979
03/13/1979CA1050572A1 Device for building up high pulse liquid pressures
12/1978
12/26/1978CA1045071A1 Hydraulic mining apparatus and method
10/1978
10/31/1978US4123109 Mining method
10/31/1978US4123108 Method and device for breaking a hard compact material
10/10/1978US4119350 Cutter drum
09/1978
09/05/1978US4111490 Method and apparatus for channel cutting of hard materials using high velocity fluid jets
09/05/1978US4111487 Underground mining machine with longwall guidance system
08/1978
08/01/1978US4103971 Method for breaking rock by directing high velocity jet into pre-drilled bore
06/1978
06/20/1978US4095845 Method of and apparatus for the mining of coal
06/13/1978US4094549 Process for hydraulically mining coal employing a cutting monitor and a breaking monitor
05/1978
05/16/1978US4089561 Cutter chains having picks and to picks therefor
04/1978
04/25/1978US4085974 Drum cutter
03/1978
03/21/1978US4079999 Method and apparatus for mining
02/1978
02/28/1978US4076311 Hydraulic mining from tunnel by reciprocated pipes
02/21/1978US4074858 High pressure pulsed water jet apparatus and process
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