Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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06/09/1992 | US5120112 Vane type conveyor for a mining machine drum |
05/19/1992 | US5114213 High pressure water assisted mining and tunnelling machine |
05/13/1992 | CN1061070A Method of composity coal mining |
05/12/1992 | US5111801 Apparatus for forming slit in rock and concrete surface |
04/29/1992 | EP0482019A1 Method and apparatus for cutting erosive materials using high pressure water means. |
04/14/1992 | US5104260 Method and apparatus for tunnelling |
04/14/1992 | US5103705 Eccentrically arranged radial boring tool apparatus |
01/22/1992 | CN1015317B Mining machine |
12/18/1991 | CN1015121B Mining machine |
12/12/1991 | CA2024263A1 Wear resistant offset sidebar chain |
11/14/1991 | DE4014751A1 Cutter drum for coal cutting machine - has main drum body mounted on rotary arbor with roller bearings |
10/08/1991 | US5054858 Selectively phased water supply of a cutter head |
07/16/1991 | US5031964 Cutting chain for mining machines |
05/23/1991 | DE3938435A1 Drilling appts. for roadway cutting or support in mine - consists of two or more drills ganged together and secured by yoke |
05/07/1991 | US5013091 Method of indirect measurement of cowl position on a longwall shearer |
04/24/1991 | EP0321492B1 Chain saw |
03/20/1991 | CN1012093B Walking hydraulic impulsive coal cutter |
03/06/1991 | EP0362292B1 Device to cut, drill or similarly machine rock, ore, concrete or similar |
02/05/1991 | CA1279865C Percussive tool with high pressure fluid jet |
01/30/1991 | CN1048908A Longwall arm combine |
01/23/1991 | CN2069923U Pick for tunnelling machine and coal cutter |
01/22/1991 | WO1991001432A1 Method and apparatus for cutting erosive materials using high pressure water means |
01/01/1991 | US4981129 Chain saw |
12/19/1990 | CN1010866B Two-spout hydraulic pulsating giant |
12/11/1990 | CA1277587C High pressure fluid jet apparatus for cutting and removing pavement |
11/28/1990 | CN1010601B Hydraulic pulse generator |
11/28/1990 | CN1010600B Double-barrel pulse-generating hydraulic monitor |
11/22/1990 | EP0397858A1 Apparatus for forming slit in base rock and concrete surface |
10/31/1990 | EP0394806A1 Method and apparatus for tunnelling |
10/24/1990 | CN2064412U Coal-winning machine with short body and single rotary drum |
10/02/1990 | US4960176 Device for cutting, drilling or similar working of rock, ore, concrete or the like |
08/21/1990 | US4950034 Shaft excavation method |
08/15/1990 | CN1009214B Hydraulic pulse generator |
07/11/1990 | CN2059182U Accordion type spray nozzle for high pressure efflux |
06/20/1990 | CN2058424U Auto-control hydraulic broken cutting tool |
06/06/1990 | CN1008288B Removing apparatus of guiding with protective hydraulic props |
05/23/1990 | EP0369606A1 Shaft excavation system |
05/23/1990 | EP0368887A1 Selectively phased water supply of a cutter head. |
05/23/1990 | DE3838862A1 Walzenlader Shearer |
05/01/1990 | US4921309 Mining machine adapted for attachment of continuous miner cutter boom assembly |
04/11/1990 | EP0362292A1 Device to cut, drill or similarly machine rock, ore, concrete or similar |
03/27/1990 | CA1267178A1 Manipulative device |
03/14/1990 | EP0358112A1 Cutter jib for cutting machines for cutting rock, concrete, etc. |
03/07/1990 | CN2054074U Slitting machine for coal mine |
03/06/1990 | US4906048 Method of downhole hydraulicking of mineral resources |
02/08/1990 | DE3826625A1 Shearer drum |
12/20/1989 | CN1006162B Hydraulic impulse generator |
11/28/1989 | US4883322 Mining and conveying apparatus |
11/15/1989 | CN2047717U High-pressure efflux rockdrill |
11/07/1989 | US4878712 Hydraulic method of mining coal |
11/02/1989 | DE3905737A1 Method of boring galleries, tunnels, caverns and the like - among other things arch profiles - with preferably activated undercutting tools which excavate in a stepped, splitting manner and are fastened to an arm arranged in an articulated and movable manner at the centre point in all directions |
10/24/1989 | US4875738 Arm-supported cutting roll with effective length pivotally adjustable along mining face |
09/07/1989 | DE3806335A1 Cutter head for winning and advance-working machines, in particular selective-cut heading machines with cross-cutting head |
08/30/1989 | EP0329915A1 Shaft for drilling tools, eccentrically arranged and rotatably mounted |
08/15/1989 | US4856719 Cutting arm |
07/27/1989 | WO1989006741A1 Apparatus for forming slit in base rock and concrete surface |
07/20/1989 | DE3800426A1 Cutter head for rock or coal extraction |
07/13/1989 | DE3844148A1 Apparatus and method for the preliminary cutting of a heading |
07/12/1989 | CN1033860A Mining machine |
07/12/1989 | CN1033859A Walking hydraulic impulsive coal cutter |
07/11/1989 | US4846631 Gearbox for a rotary, mineral cutting head |
06/28/1989 | EP0321492A1 Chain saw. |
06/14/1989 | CN2039349U Rolling and shearing cutter head of coal-minning machine for thin coal bed |
06/13/1989 | US4838615 Apparatus for excavating a recess |
06/13/1989 | US4838614 Method of excavation and apparatus therefor |
06/06/1989 | US4836613 Cutterhead for water jet assisted cutting |
05/31/1989 | EP0318285A1 Mining machine |
05/03/1989 | EP0314263A1 Mining method and apparatus |
05/02/1989 | US4826087 Manipulative device |
03/16/1989 | DE3731234C1 Hochdruckwasserstrahlgeraet mit pulsierendem Wasserstrahl Hochdruckwasserstrahlgeraet with pulsating water jet |
03/16/1989 | DE3730977C1 Shearer drum for a winning machine in mining and method of manufacturing a shearer drum |
03/16/1989 | DE3724864C1 Hochdruckwasserstrahlgeraet mit pulsierendem Wasserstrahl Hochdruckwasserstrahlgeraet with pulsating water jet |
03/15/1989 | CN1031743A Apparatus for cutting, drilling or similar machining stone. ores or similars |
03/09/1989 | WO1989001837A1 Rotating, radially impacting rollers, balls or similar for excavating/milling of rocks or other materials |
03/08/1989 | EP0306112A1 Process for laying a line in the ground |
02/23/1989 | WO1989001396A1 Device to cut, drill or similarly machine rock, ore, concrete or similar |
02/15/1989 | EP0303313A1 Device for the cutting, drilling or similar working of stone, concrete or the like |
02/08/1989 | CN1030960A 采掘机 Mining machine |
01/12/1989 | WO1989000236A1 Selectively phased water supply of a cutter head |
12/22/1988 | DE3718478A1 Coal-winning unit for a steep dip |
11/24/1988 | DE3716272A1 Cutting drum for shearer loaders used in underground mining |
10/11/1988 | US4776769 System for removing material with a high velocity jet of working fluid |
09/28/1988 | EP0284593A1 Cutting jib |
09/08/1988 | DE3705254A1 Additional roller for a roller loader |
08/24/1988 | CN87100827A Two-spout hydraulic pulsating giant |
08/24/1988 | CN87100648A Hydraulic pulse generator |
08/16/1988 | US4763955 Pitch seam mining |
08/16/1988 | CA1240496A1 Mounting system for digger tooth sectors on a trenching wheel or a tunneling drum |
08/02/1988 | US4761039 Cutting head for removing material with a high velocity jet of working liquid |
07/27/1988 | CN87100252A Double-barrel pulse-generating hydraulic monitor |
07/06/1988 | CN86108271A Hydraulic pulse generator |
07/05/1988 | US4755004 Rotary rocksaw device |
06/30/1988 | DE3643234A1 Cutting head for winning and advance working machines, in particular for selective cut heading machines with cross-cutting head |
06/22/1988 | CN87108318A Mining apparatus |
06/01/1988 | EP0269172A2 Rotary rock and trench-cutting saw |
05/25/1988 | EP0268334A2 Rotary rock and trench-cutting saw |
05/04/1988 | CN87106278A Removing apparatus of guiding with protective hydraulic props |
05/03/1988 | CA1236128A1 Hydraulic mining method |
04/21/1988 | DE3634290A1 Cutting drum equipped with a rotary transmission leadthrough, in particular for machines in underground mining |
04/20/1988 | CN86106787A Hydraulic impulse generator |