| Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602) |
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| 05/02/1996 | WO1996012869A1 Continuous highwall mining machine with armless conveyor |
| 05/02/1996 | DE4438497A1 Cutter installation for underground mine |
| 04/30/1996 | CA1338290C Impact kerfing rock cutter and method |
| 03/05/1996 | US5496095 For mining coal from outside a hill |
| 01/10/1996 | CN2217102Y Equipment for coal mining from well |
| 12/26/1995 | US5478139 Mobile digging/cutting system |
| 12/12/1995 | US5474365 Apparatus for mining a seam, in particular of coal |
| 12/06/1995 | CN1112982A Coal planning apparatus |
| 11/09/1995 | WO1995030067A1 A highwall mining system with mining and removal of coal (or ore) |
| 11/09/1995 | DE4416005A1 Step frame machine for mining seam of coal |
| 11/08/1995 | CN2212077Y Breaking-down machine |
| 10/26/1995 | DE4407115C1 Plane for hewing coal |
| 10/12/1995 | DE4412002A1 Narrow frontage machine for suspended mining of inclined coal seams |
| 09/28/1995 | DE4410133A1 Long wall face-cutting machine for mining |
| 09/13/1995 | EP0519041B1 Apparatus and method for continuous mining |
| 08/08/1995 | US5439274 Rotary mine boring head having movable links with cutter bits |
| 07/12/1995 | CN1029330C Apparatus and method for continuous mining |
| 06/27/1995 | US5426968 Arrangement for determining the tension in a chain used in a mineral mining installation |
| 06/21/1995 | CN1103926A Apparatus for underground extraction |
| 06/08/1995 | DE4340859A1 Cutting horizon adjuster for underground mining plough |
| 06/07/1995 | CN1103462A Exploiting planer used for underground exploitation |
| 06/01/1995 | WO1995014846A1 Water supply system for a mining machine |
| 04/25/1995 | US5409300 For dislodging of unstable rocks in galleries of subterranean mines |
| 04/18/1995 | US5407252 Method and apparatus for scaling mine roofs and ribs |
| 03/21/1995 | CA1334842C Systems to drill minerals etc... |
| 03/15/1995 | CN1027915C Guide of mining planing machine |
| 03/09/1995 | DE4329549A1 Machine system for winning minerals deposited as a stratum, especially coal |
| 03/02/1995 | DE4328863A1 Mining apparatus for underground mining |
| 01/26/1995 | WO1995002747A1 Highwall mining system |
| 01/26/1995 | WO1995002746A1 Highwall mining system |
| 01/19/1995 | DE4323637A1 Combined mining machine equipped with linear motors for parting, loading and conveying material occurring in seams in underground longwall mining |
| 12/28/1994 | CN1027187C Guide of mining planing machine |
| 12/15/1994 | DE4319512A1 Apparatus for parting and conveying mineral raw materials occurring in seams, in particular coal |
| 11/30/1994 | EP0309494B1 Apparatus for cutting minerals |
| 11/24/1994 | DE4316908A1 Plough system |
| 11/15/1994 | US5364171 Apparatus and method for continuous mining |
| 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 |
| 08/02/1994 | US5333937 Excavation machine having combined impact hammers and static ripper pick |
| 08/02/1994 | US5333936 Low profile mining machine having a cutter mounted on a slidable carriage |
| 07/28/1994 | DE4302004A1 Underground coal mining machine |
| 07/14/1994 | DE4300534A1 Mining cutter for use underground |
| 06/30/1994 | DE4243675A1 Surface removal increasing method for mine face stripping tool |
| 04/15/1994 | CA2108390A1 Excavation machine |
| 04/14/1994 | DE4233840A1 Planing machine used in mine, incorporating conveyor plate - incorporates flanges consisting of profiled beams engaging edges of plate |
| 04/14/1994 | DE4233839A1 Planing machine used in mine - incorporates guidance mechanism, scraper chain conveyor and cutter assembly |
| 04/05/1994 | US5299674 Conveyor system and method employing a mobile belt support structure |
| 03/24/1994 | DE4231252A1 Machine for connection of plane stock to frame of chain cutter used in coal mining - has two parallel longitudinal hook-shaped ribbed guides on side wall of frame, bolted to flange |
| 03/23/1994 | CN1084245A Unit for fastening coal planer frame on frame of scraper conveyor |
| 02/02/1994 | CN2154907Y Disk-shape drum cutter |
| 01/04/1994 | US5275469 Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter |
| 11/25/1993 | DE4237896C1 Equipment for loosening and conveying coal - works in seam with conveyor belt, recovery belt and circulating chain conveyor driven by chain wheel |
| 11/16/1993 | US5261729 Apparatus for continuous mining |
| 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 |
| 09/21/1993 | US5246274 Remote mining haulage system with self-advancing mobile tailpiece and method of operating same |
| 09/16/1993 | DE4207530A1 Drive chain tension measurement appts. - contains pressure measurement element on gear wheel in gear box, non-removable chain wheel bearing |
| 08/03/1993 | US5232269 Launch vehicle for continuous mining apparatus |
| 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 |
| 07/15/1993 | DE4200723A1 Drum-type mining machine with water jets - has closed water-cooling circuit coupled by heat-exchanger to that supplying jets with water |
| 06/22/1993 | US5221122 Multipurpose mining machine |
| 06/15/1993 | US5219440 System for cutting and conveying coal and the like |
| 05/27/1993 | DE4138553A1 Roller loader for selective extraction of minerals - has two cutting rollers with vertical rotary axes located at end of bearer arm |
| 04/28/1993 | EP0368887B1 Selectively phased water supply of a cutter head |
| 04/28/1993 | CN1071352A Marmen stone-crusher |
| 03/02/1993 | US5190352 Mining machine with cascading conveyor system and method of conveying |
| 02/24/1993 | CN1069315A Method of mining coal layer in certain plaoughing and paring depth |
| 02/16/1993 | US5185935 Method and apparatus for separation measurement and alignment system |
| 12/15/1992 | CA1311505C Selectively phased water supply of a cutter head |
| 12/01/1992 | US5167438 Guides for mineral winning ploughs |
| 12/01/1992 | CA2069843A1 Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter |
| 11/25/1992 | CN1019223B Ranging drum shearers |
| 11/19/1992 | EP0513338A1 Launch vehicle for continuous mining apparatus. |
| 11/18/1992 | CN1066317A Mining process for thin metal mine |
| 11/17/1992 | US5163738 Apparatus for mining a seam, in particular of coal |
| 10/01/1992 | WO1992010643A3 Apparatus and method for continuous mining |
| 09/23/1992 | CN2116778U Automatic rotary type light hydraulic quarrying machine |
| 09/01/1992 | US5143423 Drum assembly for a continuous miner |
| 08/18/1992 | US5139313 Guides for mineral winning ploughs |
| 08/11/1992 | US5137336 Process for the automated winning of mineral, such as coal, in a longwall working |
| 07/29/1992 | CN1063140A Apparatus and method for continuous mining |
| 07/23/1992 | WO1992010644A3 Launch vehicle for continuous mining apparatus |
| 07/15/1992 | EP0304421B1 Open-cut mining cutter |
| 06/23/1992 | US5123710 Impact assisted segmented cutterhead |
| 06/11/1992 | WO1992010644A2 Launch vehicle for continuous mining apparatus |
| 06/11/1992 | WO1992010643A2 Apparatus and method for continuous mining |
| 05/12/1992 | US5112111 Apparatus and method for continuous mining |
| 05/12/1992 | US5111801 Apparatus for forming slit in rock and concrete surface |
| 04/28/1992 | US5108154 Drive arrangement for shearing drums |
| 04/09/1992 | DE4103544C1 Deep mining heading-winning machine - has tracked propulsion system and slewing and ranging boom |
| 04/07/1992 | US5102199 Continuous mining machine with a boom assembly providing different cutting heights and method of converting |
| 03/04/1992 | CN1059183A Guide of mining planing machine |
| 03/04/1992 | CN1059181A Guide of mining planing machine |
| 03/03/1992 | US5092660 Cutter bit assemblies and arrangements for use with mining or tunnelling machines |
| 02/18/1992 | US5088796 Seam-mining apparatus |
| 02/11/1992 | US5087102 Continuous mining machine |
| 01/22/1992 | CN1015317B Mining machine |
| 12/18/1991 | CN1015121B Mining machine |
| 10/17/1991 | DE4012056A1 Coal plough with three-part blade - has one central and two wing blades loosely tongued and grooved together and hooked into drive chain |
| 10/08/1991 | US5055092 Driving systems for driving endless chains or the like in mining apparatus |