| 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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| 03/21/1989 | US4813530 Conveyor drive for miner |
| 03/16/1989 | DE3730977C1 Shearer drum for a winning machine in mining and method of manufacturing a shearer drum |
| 03/08/1989 | EP0141749B1 Method for remote control with a direct view of a machine on the yard and transmitter-receiver arrangement adapted for carrying it out |
| 02/23/1989 | WO1989001561A1 Annular shim for construction bit having multiple perforations for stress relief |
| 02/23/1989 | WO1989001548A1 Excavator shovel tooth |
| 02/14/1989 | US4804231 Point attack mine and road milling tool with replaceable cutter tip |
| 02/08/1989 | CN1030960A 采掘机 Mining machine |
| 01/25/1989 | EP0300987A1 Cutter picks |
| 01/24/1989 | USRE32840 Liquid spray jet assembly and a mineral mining machine cutting head incorporating such assembly |
| 01/19/1989 | DE3722612A1 Drive station for winning and conveying systems |
| 01/19/1989 | DE3722403A1 Process for the functional diagnosis and setting of overload clutches |
| 01/12/1989 | WO1989000236A1 Selectively phased water supply of a cutter head |
| 01/12/1989 | DE3721854A1 Arrangement for indicating the stroke of hydraulic control cylinders for setting the cutting horizon of underground winning machines and the like |
| 01/05/1989 | DE3720367A1 Abdichtung fuer eine mit berieselungsfluessigkeit zu versorgende schneidwalze eines walzenladers Seal for a berieselungsfluessigkeit to be supplied with cutting roll a roll loader |
| 12/28/1988 | CA1247664A Apparatus for working deposits by the open-cast working process |
| 12/14/1988 | EP0295232A1 Tool for breaking, cutting or working of solid materials |
| 12/08/1988 | DE3717188A1 Verfahren zur verminderung der zuendgefahr beim einsatz einer teilschnitt-streckenvortriebsmaschine A process for reducing the danger of ignition when using a partially sectional mining machine |
| 12/08/1988 | DE3713703C1 Regulating device for controlling the admission of liquid to the nozzles of the cutting drum of a shearer loader |
| 11/22/1988 | US4786111 Apparatus and method for delivering liquid coolant to drum mounted cutting tools |
| 11/17/1988 | DE3714838A1 Device for controlling winning machines in the direction of advance |
| 11/17/1988 | DE3714430A1 Anti-locking means for plough systems |
| 11/15/1988 | CA1244706A1 Continuous miner-mounted mine ventilation system |
| 11/03/1988 | DE3712832A1 Arrangement for controlling the feed of sprinkling liquid to a cutting drum |
| 11/03/1988 | DE3712831A1 Winning or selective-cut heading machine, the cutting drums of which emit liquid in a pulsating manner |
| 11/02/1988 | EP0288775A1 Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties |
| 10/27/1988 | DE3712427A1 Round-shank cutting tool with tool holder |
| 10/13/1988 | DE3711105A1 Wear-resistant guide piece for mining machines, in particular winning ploughs, guided on a sliding guide |
| 10/12/1988 | EP0286555A1 Device for securely, rapidly and removably attaching a tool to a tool holder |
| 10/11/1988 | US4776639 Tool assembly for mining machines, coal planes and coal cutting machines |
| 10/11/1988 | US4776637 Cutting machines and method of controlling the cutting horizon |
| 09/27/1988 | CA1242463A1 Multi-insert cutter bit |
| 09/22/1988 | DE3711069C1 Steuerung der Wasserzufuhr zu den Duesen der Schneidwalzen eines Walzenladers Controlling the water supply to the Duesen the cutting rolls of a shearer |
| 09/15/1988 | DE3806363A1 Pick arrangement |
| 08/24/1988 | CN86206244U Automatic control hydraulic pick |
| 08/23/1988 | US4765687 Tip and mineral cutter pick |
| 08/23/1988 | US4765686 Rotatable cutting bit for a mining machine |
| 08/23/1988 | US4765419 Rock drill with cutting inserts |
| 08/16/1988 | US4763956 Mining tool retainer |
| 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 |
| 08/09/1988 | US4762372 Cutter-bit assemblies |
| 08/04/1988 | DE3701601A1 Leakage-water drain at the cutting drum of a winning or heading machine and the like |
| 07/28/1988 | DE3701063A1 Apparatus for the cutting-head spraying in a winning machine or the like, in particular a shortwall machine for use in underground mining operations |
| 07/27/1988 | EP0275890A1 Round shank pick |
| 07/20/1988 | EP0274711A1 Cutting tool for a mining machine |
| 07/20/1988 | EP0274645A1 Erosion resistant cutting bit with hardfacing |
| 07/19/1988 | US4758049 Apparatus for the underground operation of a movable mining machine |
| 07/07/1988 | DE3644169A1 Cutter-securing arrangement for parallel-shank cutters, in particular for use with roll-type crushers |
| 07/05/1988 | US4755004 Rotary rocksaw device |
| 07/05/1988 | US4755003 Cutter bit assembly with resilient bit retainer |
| 07/05/1988 | US4755002 Mining machine |
| 07/02/1988 | WO1988005116A1 Method and pick-up for checking of hidden boundary coal-rock |
| 06/30/1988 | DE3643234A1 Cutting head for winning and advance working machines, in particular for selective cut heading machines with cross-cutting head |
| 06/29/1988 | CN87107117A Method for remote control of coal shearer |
| 06/28/1988 | US4753484 Method for remote control of a coal shearer |
| 06/16/1988 | DE3641534A1 Circuit for transmitting control commands and measured values of a mining machine for underground use |
| 06/09/1988 | DE3641715A1 Machine track for shearer loaders in underground working |
| 06/07/1988 | CA1237741A1 Wear-parts system |
| 06/02/1988 | WO1988003985A1 Cutting machine |
| 05/31/1988 | CA1237451A1 Mineral cutter picks and pick assemblies |
| 05/31/1988 | CA1237273A1 Tool with soldered tip |
| 05/19/1988 | DE3639452A1 Plough-track spraying system |
| 05/19/1988 | DE3639133A1 Shearing machine movable on the face or goaf side of a face conveyor |
| 05/17/1988 | US4744605 In a material removing machine |
| 05/17/1988 | US4744158 Excavator tooth assembly for earth moving equipment |
| 05/17/1988 | CA1236859A1 Support for a cutting tool for cutting hard material |
| 05/11/1988 | DE3735645A1 Switching valve |
| 05/10/1988 | US4743137 Tool having a hard metal part with a solder and lining type connection |
| 05/10/1988 | US4743069 Rotatable cutting bit |
| 05/03/1988 | US4741577 Double ranging drum cutter having load controller |
| 04/26/1988 | US4740037 Continuous mining machine |
| 04/21/1988 | DE3634290A1 Cutting drum equipped with a rotary transmission leadthrough, in particular for machines in underground mining |
| 04/20/1988 | EP0264015A1 Rotatable cutting bit |
| 04/14/1988 | DE3634599A1 Method of controlling winning machines in underground use |
| 04/14/1988 | DE3633658A1 Advancing and control mechanism for a shortwall machine |
| 04/07/1988 | WO1988002436A1 Cutter-holder for stone and mineral hewing machines |
| 04/07/1988 | DE3706884C1 Control for the supply of spraying liquid to the cutting-roller spray nozzles on roller-cutting machines and arrangement of the supply of spraying liquid to the spray nozzles of a cutting roller for underground mining |
| 04/05/1988 | US4735458 Device for intermittently subjecting axially shiftable bits of a cutting head to the action of pressurized fluids |
| 04/05/1988 | CA1234874A1 Direct view remote control method for workings machine and transmitter and receiver assembly for carrying out such method |
| 03/31/1988 | DE3731381A1 Mineralschneidmittel Mineral cutting means |
| 03/29/1988 | US4733915 Device for supplying fluid at tools for breaking solid material |
| 03/29/1988 | US4733914 Apparatus to deliver high pressure liquid from nozzles on a shearer drum for a mining machine |
| 03/29/1988 | CA1234588A1 Cutter-bit assemblies |
| 03/24/1988 | DE3631216A1 Cutting roller for road-grooving machines (road-milling machines) |
| 03/24/1988 | DE3631087A1 Method of operating winning machines or selective-cut heading machines used in underground mining |
| 03/16/1988 | EP0259620A1 Cutter bit having hard tip with middle section defined by concave surface of revolution |
| 03/16/1988 | CN87105527A Guiding direction apparatus of planing machine chain with supporting board and pulling hook plane |
| 03/10/1988 | DE3630449A1 Connection unit which can be connected to the pans of a scraper chain conveyor and has a walking-mechanism and control-cylinder connection |
| 03/10/1988 | DE3630444A1 Excavating device for material excavation by cutting |
| 03/10/1988 | DE3630443A1 Device for the cutting winning/extraction of materials |
| 03/10/1988 | DE3629319A1 Side spill plate for winning machines |
| 03/08/1988 | US4729603 Round cutting tool for cutters |
| 03/01/1988 | US4728153 Cylindrical retainer for a cutting bit |
| 02/25/1988 | DE3628737A1 Winning machine for underground mining |
| 02/25/1988 | DE3628180A1 Advancing and swivelling apparatus for a short-wall machine |
| 02/18/1988 | DE3635018C1 Holder for picks of shearing machines for winning mineral substances |
| 02/18/1988 | DE3627733A1 Plough chain guide for baseplate ploughs |
| 02/18/1988 | DE3627273A1 Pick arrangement on the cutting head of a tunnel-driving machine or the like |
| 02/16/1988 | US4725099 Rotatable cutting bit |
| 02/16/1988 | US4725098 Erosion resistant cutting bit with hardfacing |