| Patents for E21C 35 - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or (6,127) |
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| 01/27/1981 | US4247150 Bit arrangement for a cutting tool |
| 01/27/1981 | US4247147 Retainer clip for cutter bits |
| 01/20/1981 | US4245526 Mining machine haulage transmission |
| 01/20/1981 | CA1093938A1 No translation available |
| 01/13/1981 | US4244625 Apparatus for cutting hard earth formations |
| 01/07/1981 | EP0020824A1 Push drill guidance system |
| 12/23/1980 | US4240669 Mining cutter bit holder and mounting assemblies |
| 12/23/1980 | US4240667 Driving gear rack cleaner for a mining machine |
| 12/23/1980 | US4240666 Device for mining of thick strata of useful minerals |
| 12/16/1980 | US4239289 Maneuverable full face miner |
| 12/02/1980 | US4236627 Cutting machine |
| 11/25/1980 | US4235475 Mineral mining equipment |
| 11/18/1980 | US4234234 Driving device for a mining machine |
| 11/18/1980 | US4234233 Chain driven cutting bucket for use in deep mining |
| 11/18/1980 | US4234060 Brake equipment |
| 10/28/1980 | US4230370 Equipment for laying elongate material |
| 10/21/1980 | CA1087878A1 Cemented carbide-steel composites for earthmoving and mining applications |
| 10/14/1980 | US4228508 Automatic longwall mining system and method |
| 10/07/1980 | US4226476 Continuous miner with improved roof-to-floor anchoring canopy units for advancing and turning machine and installing roof bolts |
| 10/01/1980 | EP0016297A1 Device for controlling the position of a tunnel boring machine |
| 09/30/1980 | US4225188 Apparatus for removing and collecting moisture from a moisture-laden air flow |
| 09/30/1980 | US4225186 Horizontal mining machine and method of slot mining |
| 09/30/1980 | US4225144 Device for sealing the gap between component parts rotatable relative to each other |
| 09/23/1980 | US4223950 Longwall cutting machines with drum moved by plural power means |
| 09/16/1980 | US4222446 Cutter with cutter holder for disintegrating of material, particularly of rock |
| 09/03/1980 | EP0014776A1 Rock cutter jib |
| 08/26/1980 | US4219239 Mining auger |
| 08/20/1980 | EP0014695A1 Cutter head with water nozzles and process for operating this head |
| 08/12/1980 | US4216999 Machine for mining tar sands having rearwardly directed exhaust related to conveyor trough |
| 07/15/1980 | US4212559 Means for connecting a male part with a female part |
| 07/15/1980 | US4212497 Liquid discharge apparatus for a shearing-loader type mining machine |
| 07/15/1980 | CA1081720A2 Wedge arrangement for removably affixing a work tool or work tool holder to a base member on mining machinery and the like |
| 07/01/1980 | CA1080757A1 Automatic face transfer linear cutting rotary head continuous mining machine |
| 06/03/1980 | US4205882 Mineral mining conveyor with guide connecting feature |
| 06/03/1980 | US4205881 Machine and method for mining hard material in-situ between adjacent auger holes |
| 05/13/1980 | US4202434 Stabilizer assembly for a mining machine conveyor |
| 05/06/1980 | US4201421 Mining machine bit and mounting thereof |
| 04/30/1980 | EP0010536A1 Device for cooling the picks of cutter heads and the working face and for preventing the formation of dust |
| 04/30/1980 | EP0010534A1 Device for cooling the picks of the cutting tools of a cutting machine and the excavation face and for preventing the formation of dust |
| 04/29/1980 | US4200338 Mineral mining installation |
| 04/29/1980 | US4200335 Gauging apparatus and method, particularly for controlling mining by a mining machine |
| 04/29/1980 | US4200036 Ventilation system for automated mining machines |
| 04/22/1980 | US4199107 Liquid spray jet assembly and a mineral mining machine cutting head incorporating such assembly |
| 04/15/1980 | CA1075728A1 Push pull mining system |
| 04/08/1980 | US4196935 Equipment for laying elongate material |
| 04/08/1980 | US4196934 Shortwall mining machine |
| 04/08/1980 | US4196798 Brake equipment for mining machines |
| 04/01/1980 | US4195512 Coal-shale interface detector |
| 03/25/1980 | US4194791 Grooved earthworking bit and method of enhancing the life thereof |
| 03/25/1980 | US4194790 Rock cutting tip inserts |
| 03/25/1980 | CA1074345A1 Mineral cutting picks |
| 03/25/1980 | CA1074344A1 Bit holder |
| 03/18/1980 | US4193638 Multiple tip cutting bit for rotary drum-type cutter |
| 03/11/1980 | US4192551 Remote control system for mining machines |
| 03/11/1980 | US4192550 Reflected light determination of geological strata |
| 02/26/1980 | CA1072588A1 Rock milling cutters |
| 02/26/1980 | CA1072352A1 Methods of and apparatus for applying roof mats to mine workings |
| 02/19/1980 | US4189187 Mineral mining planer having pivoted floor cutter carrier |
| 02/19/1980 | US4189183 Mining machine with cutter drums and sensing apparatus |
| 02/12/1980 | US4188069 Mining machine having walk-on platform on cutter arm |
| 02/05/1980 | US4186971 Device for cooling cutting teeth of cutter heads of cutting machines |
| 02/05/1980 | US4186969 Apparatus for controlling the position of a mining machine |
| 02/05/1980 | US4186553 Cable protection equipment |
| 01/29/1980 | US4185874 Longwall installation with carrier for water and electric supply and propulsion rock |
| 01/01/1980 | US4181828 Safety cut-out devices |
| 01/01/1980 | US4181360 Cutting force sensor |
| 01/01/1980 | US4181115 Power control of a stone cutting machine having cutting chains |
| 12/25/1979 | US4180292 Rock milling cutter tongue and slot connected |
| 12/25/1979 | US4180291 Mineral mining installation |
| 11/13/1979 | CA1066311A2 Mining apparatus and method |
| 11/13/1979 | CA1066310A1 Method of extracting coal |
| 10/16/1979 | US4171147 Flywheel for a construction machine |
| 10/09/1979 | US4170267 Tooth for rotary drilling tool for drilling foundations |
| 10/02/1979 | CA1063626A1 Full face miner |
| 09/18/1979 | US4167998 Arrangement for tensioning a gateway conveyor in a sloping gateway |
| 09/04/1979 | CA1061811A1 Method for cutting minerals and cutting machine |
| 08/07/1979 | US4163581 Retaining means for the connecting pin which joins a bit holder to a base member |
| 07/24/1979 | US4162103 Drive arrangements for mining machines |
| 07/10/1979 | US4160566 Mining apparatus |
| 07/03/1979 | US4159850 Mineral mining installation with face end winning |
| 07/03/1979 | US4159746 Bit of circular cross-section |
| 06/26/1979 | US4159149 Coal mining auger |
| 06/05/1979 | US4157204 Face ventilation system for coal mines |
| 05/22/1979 | US4155598 Longwall mining machine |
| 05/22/1979 | US4155595 Mining method and apparatus |
| 05/22/1979 | US4155594 Method of and apparatus for steering a mining machine |
| 05/15/1979 | US4154483 Mineral cutting picks |
| 05/15/1979 | US4154482 Mineral mining machines |
| 05/15/1979 | US4154480 Mineral mining installation |
| 05/01/1979 | US4151905 Operator carriage |
| 04/17/1979 | US4149753 Cutter bit assemblies |
| 04/17/1979 | CA1052829A1 Cutting machine |
| 04/10/1979 | CA1052453A1 Clip for printed circuit board edge connector |
| 03/13/1979 | US4143920 Mineral cutting pick insert shape |
| 03/13/1979 | US4143918 Mining conveyor assemblies with control boxes on fence |
| 03/13/1979 | US4143552 Coal seam sensor |
| 03/06/1979 | US4142812 Scraper-chain conveyors |
| 03/06/1979 | CA1050053A1 Dividing cutting machine |
| 02/06/1979 | USRE29900 Pick-type mining bit with support block having rotatable seat |
| 01/23/1979 | CA1046780A1 Method and apparatus for supporting the roof of an underground mine working |