| 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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| 01/19/1995 | WO1995002112A1 Cutting element for a coal cutting machine |
| 01/11/1995 | EP0428599B1 Cutter bit |
| 01/11/1995 | EP0425552B1 Cutter bit and tip |
| 01/05/1995 | WO1995000743A1 Method of mining |
| 01/04/1995 | CN1027299C Guiding device of mining machines |
| 01/03/1995 | US5378050 Cylinder-shaped cutting body for a coal cutting machine |
| 01/03/1995 | US5378048 Spray nozzle for mining |
| 12/28/1994 | CN1096845A Arm of combined cutter loader |
| 12/28/1994 | CN1027187C Guide of mining planing machine |
| 12/21/1994 | CN1027092C Guide of planing machine for make flank loading on trough of chain scraper conveyer |
| 12/20/1994 | US5374111 Extraction undercut for flanged bits |
| 12/14/1994 | EP0414751B1 Bit assembly utilizing carbide insert |
| 12/08/1994 | DE4316798A1 Drive arrangement for plough systems or face conveyors |
| 12/06/1994 | US5370448 Wedging arrangement for attaching a bit holder to the base member of a mining road working, or earth moving machine |
| 11/24/1994 | WO1994027027A1 Improvements in coal and rock picks |
| 11/24/1994 | CA2162292A1 Improvements in coal and rock picks |
| 11/15/1994 | US5364171 Apparatus and method for continuous mining |
| 11/10/1994 | WO1994025734A1 Extraction undercut for flanged bits |
| 11/08/1994 | US5362133 Method of mining coal seams at a defined preset depth of cutting during ploughing with a cutter |
| 10/11/1994 | CA1332431C Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties |
| 10/05/1994 | EP0618348A1 Cutting bit holder sleeve with retaining flange |
| 10/05/1994 | CN1093140A Mining with rotative coal face |
| 09/27/1994 | CA1332179C Cutter bit and tip |
| 09/27/1994 | CA1332178C Cemented carbide tip |
| 09/08/1994 | DE4306206A1 Milling-cutter arrangement for road-milling machines |
| 09/07/1994 | CN2176430Y Bits for coal cutter and digger |
| 08/30/1994 | US5343130 Control system for automatically halting the movement of a machine in the mine working |
| 08/18/1994 | DE4304046A1 Fastening of the cutting strip to the body of a coal plough |
| 08/16/1994 | US5338103 Control arrangement for adjusting the position of a mineral winning machine in a mineral mining installation |
| 08/16/1994 | US5338102 Method of mining |
| 08/09/1994 | US5335977 Double acting bit holder |
| 08/02/1994 | US5333938 Cutter bit |
| 06/30/1994 | DE4243675A1 Surface removal increasing method for mine face stripping tool |
| 06/28/1994 | US5324098 Cutting tool having hard tip with lobes |
| 06/28/1994 | CA1330449C Retainer for rotatable bits |
| 06/23/1994 | WO1994013932A1 Cutting tool having hard tip with lobes |
| 06/21/1994 | US5322351 Rotary cutter and mounting arrangement for cutting tools |
| 06/14/1994 | US5319855 Mineral cutter tip and pick |
| 06/07/1994 | US5318351 Cutting tool bit assembly |
| 06/07/1994 | US5318006 Cutting insert utilizing superabrasive compacts |
| 06/05/1994 | CA2110636A1 Mineral cutter tooling system |
| 05/25/1994 | CN2166224Y Flower bud shape alloy head pricks |
| 05/10/1994 | US5310249 Method and apparatus for automatically controlling a mining machine |
| 05/10/1994 | US5310248 Automatic vein identifying method and follower apparatus for use in a robot mining system |
| 05/05/1994 | DE4236519A1 Overload protection for chain drives, esp. for chain-driven coal cutter - involves comparing actual and desired revolution rates to control overload coupling switching |
| 05/03/1994 | US5308151 Cutter wheel assembly for mining machine |
| 04/28/1994 | DE4234948A1 Cutting tool for extracting machines - has nozzle unit with lower sieve sealingly fitted in bit pocket and has water supplied through two part supply canal |
| 04/21/1994 | DE4234720A1 Horizontal control of mine plough cutter - using computer to adjust control elements for cutter so as to maintain horizontal path |
| 04/19/1994 | US5303984 Cutting bit holder sleeve with retaining flange |
| 04/14/1994 | DE4234281A1 Conveyor guidance system on mining machine - incorporates tilting linkage connected to actuating cylinders |
| 04/14/1994 | DE4233840A1 Planing machine used in mine, incorporating conveyor plate - incorporates flanges consisting of profiled beams engaging edges of plate |
| 04/13/1994 | CN2161724Y 截齿 Picks |
| 04/12/1994 | US5302005 Apparatus for holding a cutting bit |
| 03/29/1994 | US5297853 Insert for radial cutter |
| 03/23/1994 | EP0587991A2 Pickholder for shears drum or cutting head |
| 03/22/1994 | US5295733 Fiber optic remote control system for a continuous miner and method of use |
| 03/17/1994 | WO1994005899A1 Dust scrubber for use with continuous mining equipment |
| 02/24/1994 | DE4227584A1 Cutter-head for rock- or coal-mining - has plungers in circle in blind holes connected to coolant supply forming seal between stationary and rotary halves |
| 02/16/1994 | CN2156159Y Hydraulic storage house cleaning machine |
| 02/09/1994 | CN2155429Y Pick for coal-winning machine |
| 01/04/1994 | US5275469 Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter |
| 12/28/1993 | US5273343 Non-rotatable sleeve for a cutting tool bit holder and method of making the same |
| 12/23/1993 | DE4220333A1 Measuring piston displacement in hydraulic working cylinder - determining flow of hydraulic medium through cylinder from pressure difference measurement across choke |
| 12/21/1993 | US5272289 Scraper chain conveyor |
| 12/09/1993 | DE4227704C1 Retainer for chisel in extraction machine for mining - has chisel held by at least one pivot stirrup above retainer |
| 12/09/1993 | DE4227703C1 Chisel retainer for extraction machine in mining - involves chisel held in holder by at least one spring-elastic clamp connecting chisel to retainer by snap engagement in region of its collar |
| 12/07/1993 | US5268683 Method of transmitting data from a drillhead |
| 12/02/1993 | DE4217827A1 Mining-machine cutting tool with water spray nozzle - has nozzle insert comprising head fitting in flange and with chamber in underside for protruding compression joint containing pipe |
| 11/18/1993 | DE4215785A1 Braking controller for roller-cutter in mining operation - imposes limit on frequency of supply from inverter to traction motors until brake release is signalled e.g. by proximity sensors |
| 11/16/1993 | US5261729 Apparatus for continuous mining |
| 11/16/1993 | US5261499 Two-piece rotatable cutting bit |
| 11/09/1993 | CA2041373C Vehicle guidance system |
| 11/04/1993 | DE4214688A1 Automatic limit switch-off unit for chain driven extraction cutter - uses overload protection system connected so that, upon overloading, cutter chain together with chain wheel are disconnected from drive |
| 10/19/1993 | US5253925 Method and apparatus for collecting and removing dust on a mining machine |
| 10/14/1993 | DE4235359C1 Spray system for underground mining machine - detects quantity of material conveyed to crushing tool to control spray jet intensity for effective dust suppression |
| 10/12/1993 | US5251964 Cutting bit mount having carbide inserts and method for mounting the same |
| 10/07/1993 | DE4210955A1 Steel drill bit partially coated with wear resistant material having prolonged service life - has medium alloy steel base, wear resistant layer, hard pin in receiving hole in base |
| 09/22/1993 | CN1022196C Method of conveying data in whole mine |
| 09/15/1993 | CN1076246A Sealed conveyer for mine |
| 09/09/1993 | DE4207229A1 Screen wall for long wall conveyor with inclined setting - has hinged door in side wall access aperture,swivelable in direction of working face |
| 08/17/1993 | US5235961 Carbide tip and pick |
| 08/10/1993 | US5234258 Cutter for extraction machines |
| 08/10/1993 | US5234256 Cutting apparatus for mining operations with automatic control |
| 08/05/1993 | DE4202961A1 Chisel holder with receptacle for chisel shaft - has hard metal ring inserts at top and bottom supported by profiled projection |
| 07/27/1993 | US5230548 Longwall cutter drum having reduced production of dust |
| 07/22/1993 | DE4200897A1 Adjuster for cutting horizon of coal plough - has vertical slider engaging projecting head of jib whose position is adjusted by pressure and counter pressure of slider |
| 07/21/1993 | EP0528917A4 Mobile continuous mining machine |
| 07/20/1993 | US5228751 Control system for longwall shearer |
| 07/06/1993 | CA1319954C2 Long range multiple point wireless control and monitoring system |
| 06/15/1993 | US5219209 Rotatable cutting bit insert |
| 06/15/1993 | US5219208 Scrubber for dispersing dust generated by longwall shearers |
| 05/26/1993 | EP0543068A1 Tool block with non-rotating, replaceable wear insert |
| 05/05/1993 | CN2131977Y Take-up unit of extensible belt conveyer |
| 05/04/1993 | CA1317332C Trenching tool assembly with dual indexing capability |
| 04/28/1993 | EP0368887B1 Selectively phased water supply of a cutter head |
| 04/27/1993 | US5205612 Transport apparatus and method of forming same |
| 04/21/1993 | CN2130207Y Dry coal net type sieving and transport plate conveyor |
| 04/14/1993 | CN2129823Y Dismantling belt rolling core shaft of belt conveyer |
| 04/14/1993 | CN2129822Y Water coal net type sieving plate conveyor |
| 04/13/1993 | US5201569 Mounting for receiving a mining pick bit |