Patents
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)
06/1990
06/06/1990CN1008289B Guiding direction apparatus of planing machine chain with supporting board and pulling hook plane
06/05/1990US4931638 Method of monitoring hidden coal-rock interface and transducer realizing this method
05/1990
05/23/1990EP0368887A1 Selectively phased water supply of a cutter head.
05/23/1990DE3838221A1 Method of controlling heading machines and apparatus for carrying out the method
05/16/1990CN1042214A Long range multiple point wireless control and monitoring system
05/15/1990US4925247 Method for particle stabilization by use of cationic polymers
05/09/1990CA2001681A1 Miner cutting bit holding apparatus
05/01/1990US4921310 Tool for breaking, cutting or working of solid materials
05/01/1990US4921306 Mining machine and method utilizing intensifier for high and low water pressure to cutting drum
04/1990
04/11/1990EP0362455A1 Chisel arrangement
04/10/1990US4915455 Miner cutting bit holding apparatus
04/10/1990US4915454 Mining bit and holder
04/05/1990DE3929609A1 Mounting for round shafted chisel - has hard metal lined seating which extends its useful life
04/03/1990US4913125 Cutter picks
03/1990
03/29/1990DE3931282A1 Control system for coal cutting machine - has array of thrust rams coupled to dosing pumps and control valves
03/28/1990CN1040846A Cutter bit and tip
03/27/1990US4911504 Cutter bit and tip
03/27/1990US4911503 Earth engaging cutter bit
03/22/1990WO1990002865A1 Chisel bit arrangement
03/14/1990CN1040413A Improved method and apparatus for steering mining machine cutter
03/13/1990CA1266651A1 Rock drill with cutting inserts
03/07/1990CN1040247A Cutter bit
03/07/1990CN1040244A Cemented carbide tip
03/01/1990DE3828942A1 Pick arrangement for a winning plough
02/1990
02/22/1990DE3926957A1 Coal cutting plant with cutter and scraper chain conveyor - has cutting distance measurement unit with sensors assigned to cutter unit and electronic evaluation unit
02/22/1990DE3925900A1 Verfahren und vorrichtung zum steuern der nachlaufenden schneidtrommel einer doppelendigen schraemmaschine im bergbau Method and device for controlling the trailing cutting drum a double-ended cutting machine in mining
02/20/1990US4902073 Cutter pick for mining using hydraulic stream
02/15/1990DE3827114A1 Device for securing round-shank picks
02/08/1990WO1990001107A1 Cemented carbide tip
02/08/1990WO1990001106A1 Cutter bit
02/08/1990WO1990001105A1 Cutter bit and tip
01/1990
01/24/1990EP0352243A1 Fluid supply valve for the holder of a cutting tool
01/23/1990US4895413 Cutter roller with spraying nozzle
01/18/1990DE3824059A1 Arrangement for transmitting the operating data of underground mining machines, for example shearer loaders
01/17/1990EP0351245A1 Cutting tool for a mining machine
01/16/1990US4893875 Ground engaging bit having a hardened tip
12/1989
12/07/1989DE3818588A1 Method and arrangement for distinguishing between different materials
12/07/1989DE3817526A1 Device for cooling the cutters of heading machines, in particular in coal mining
12/06/1989EP0345114A1 Tool for a mining machine having an abrasive diamond part
12/05/1989US4884847 Apparatus and method for mapping entry conditions in remote mining systems
11/1989
11/30/1989DE3818213A1 Pick, in particular for underground winning machines, heading machines and the like
11/30/1989DE3818045A1 Tool for excavating rock and minerals
11/29/1989CN2048512U Portable tester for machines
11/28/1989US4883129 Bit assembly utilizing carbide insert
11/23/1989DE3816505A1 Cutting drum for a winning machine used underground
11/14/1989US4880278 Cutting tool for a mining machine
11/14/1989US4880247 Cutting tools
11/09/1989DE3914200A1 Vorrichtung zum intermittierenden bespruehen von meisseln eines schraemkopfes Apparatus for intermittently spraying carve a cutting head
11/07/1989US4878714 Cutting machine for cutting and carrying away material from a work face
10/1989
10/26/1989DE3815249A1 Pick holder for machines for excavating rocks and minerals
10/12/1989DE3804987C1 Cable drag chain
10/11/1989EP0150210B1 Continuous mining machine
10/05/1989DE3902519A1 Thrust-piston mechanism for setting the cutting horizon of underground winning machines
10/05/1989DE3844297A1 Pick arrangement, consisting of pick and pick holder, in particular for crushing rolls
10/05/1989DE3809741A1 Computer system for mining equipment of an underground operation
09/1989
09/26/1989US4870697 Two-way communication system for winning machines in underground mining
09/26/1989US4869358 Conveyor belt system for a continuous mining machine
09/21/1989DE3808326A1 Device for advancing the conveyor in working operations
09/20/1989EP0332883A1 Crawler mounted drill vehicle
09/12/1989US4865392 Rotatable cutting bit
09/07/1989DE3806335A1 Cutter head for winning and advance-working machines, in particular selective-cut heading machines with cross-cutting head
09/07/1989DE3806224A1 Device for tracking the movement of a moving object, especially of a getter machine in mining
09/07/1989DE3805827A1 Cutting drum fitted with sprinkling nozzles for shearer loaders or selective-cut heading machines
09/07/1989DE3805825A1 Device for feeding sprinkling liquid to the nozzles of a cutting drum
09/07/1989DE3805659A1 Control of the liquid feed of the reversible flow filter of a mining machine in underground use
08/1989
08/29/1989US4861111 Mining cutter-loader for winning minerals
08/24/1989DE3803954A1 Spraying arrangement for the cross-cutting head of a selective-cut heading machine and the like
08/22/1989US4859543 Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties
08/10/1989DE3802992A1 Spray valve device for dust suppression in underground spaces, in particular in underground operations with hydraulic support units
08/03/1989DE3802656A1 Valve for an air conduit simultaneously used with a water conduit
08/03/1989DE3801931A1 Method and circuit for operating a shearer loader hauled by roadway winches
08/01/1989US4852947 Operating head with phased fluid delivery
07/1989
07/27/1989DE3803941C1 Bar shield for the face support in collieries
07/25/1989US4850649 Rotatable cutting bit
07/20/1989DE3800539A1 Lubricating device for shearer loaders in underground operation
07/20/1989DE3800426A1 Cutter head for rock or coal extraction
07/12/1989EP0147419B1 Rotatable cutting bit
07/11/1989US4846631 Gearbox for a rotary, mineral cutting head
07/04/1989US4844550 Wear protector for tooth brackets on roadway surface cutting machines
06/1989
06/29/1989DE3841524A1 Apparatus for detecting the cutting horizon for winning machines
06/27/1989US4842337 Mining bit and holder
06/21/1989EP0321383A1 Device for detecting the cutting horizon for winning machines
06/20/1989US4840432 Continuous miner with duct assembly
06/06/1989US4836614 Retainer scheme for machine bit
06/06/1989US4836613 Cutterhead for water jet assisted cutting
06/06/1989US4836178 Inset for a tool
06/01/1989DE3838354A1 Kohleabbaumaschine Coal mining machine
05/1989
05/18/1989DE3737525A1 Plough guide for a winning plough
05/09/1989US4828327 Bit holder for miner
04/1989
04/26/1989EP0224548B1 Mining machine control system
04/25/1989US4823454 Method of attaching a rotatable cutting bit shield
04/18/1989US4822105 Double ended ranging drum shearer and method of controlling working height in mining face in use of the same
04/18/1989US4821819 Annular shim for construction bit having multiple perforations for stress relief
04/13/1989DE3732691A1 Method and device for feeding a water/air mixture to the nozzles of a rotating cutting drum
04/11/1989US4819990 Floor cutters for mineral winning ploughs
04/06/1989DE3731904A1 Dust-protection device for the machine operator of a selective-cut heading machine
04/05/1989CN1032203A Dipper teeth of digging machine
04/04/1989US4819273 Mining machine control system
04/04/1989US4818027 Round shaft bit
03/1989
03/23/1989DE3730914A1 Halter fuer die kabelkette einer walzenschraemmaschine Holder for the cable chain of a drum shearing machine
1 ... 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62