Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21C - Mining or quarrying › E21C 27 - Machines which completely free the mineral from the seam
Patents for E21C 27 - Machines which completely free the mineral from the seam (1,602)
06/2000
06/07/2000CN1053256C Appts. for underground extraction
05/2000
05/25/2000DE19954237A1 Stabilizing cutting arm on sectional scraper machine, by blocking hydraulic fluid supply to pivot drive unit at given arm working position and then activating second pivot drive unit for next position
05/25/2000DE19954236A1 Vibration measuring and compensation device for sectional scraper machine, comprises sensors measuring jib arm bend stress and pivot position deviation
03/2000
03/23/2000WO2000015947A1 Mining machine and mining method
03/14/2000US6036276 Conveyor lift and service shoe assembly and method of moving
02/2000
02/22/2000US6027175 Method and apparatus for highwall mining
02/08/2000CA2075619C Apparatus and method for continuous mining
12/1999
12/28/1999US6007157 Slidably displaceable duct assembly for a mining machine
12/08/1999CN2352673Y Machine for completely free coal from seam
12/07/1999US5997100 Inertization system for highwall mining
11/1999
11/30/1999US5992941 Conveyor for ultra thin seam coal mining
10/1999
10/27/1999EP0891469B1 Partial cutting machine
10/19/1999US5967616 Electrical control system for apparatus and method for continuous underground mining
10/12/1999US5964507 Apparatus for mining a mineral seam
10/07/1999DE19724925C2 Schrämmaschine für die Gewinnung mineralischer Stoffe im Langfrontbau unter Tage und ihre Verwendung Cutting machine for the extraction of mineral substances in Langfrontbau underground and their use
09/1999
09/22/1999EP0943051A1 Device for damping vibrations in a part-face cutting machines
08/1999
08/04/1999CN1224793A Method of recovering coal from blasted down roof
07/1999
07/29/1999DE19802225A1 Coal face planing machine with replaceable chisels
07/13/1999US5921632 Method and apparatus for extending the cutter drum of a boring machine
06/1999
06/30/1999CN1043917C Water supply system for mining machine
06/24/1999DE19756418A1 Lowering machine for use in galleries of mines
06/02/1999EP0747572A4 Face-working machine
05/1999
05/20/1999DE19750484A1 Coal cutting and excavation equipment
05/14/1999WO1999023358A1 Cutting machine
05/14/1999WO1999023356A1 Device for cutting or kirving material
05/06/1999EP0912816A1 Cutting control process and device for detecting the depth of cut of kirving tools
05/05/1999CN2317309Y Mining hinge joint top beam level wedge
04/1999
04/20/1999US5895097 Continuously operating mining machine for simultaneous excavation and conveying of coal
04/15/1999WO1999018325A1 Rock or earth penetrating devices and methods
03/1999
03/31/1999CN2312325Y Equipment for obtg. coal by method of comprehensive coal mining low place breaking-down coal and old coal mine storage
03/25/1999WO1999014463A1 Anchor boring and setting device
03/04/1999DE19737936A1 Underground-mining machine
02/1999
02/25/1999DE19736662A1 Coal face cutter
02/16/1999US5871260 Mining ultra thin coal seams
02/04/1999WO1999005052A1 Conveyor for ultra thin seam coal mining
02/04/1999DE19732946A1 Underground-mining machine, particularly for longwall coal-face
02/03/1999CN2306316Y Driving slitting machine
01/1999
01/20/1999EP0891469A1 Partial cutting machine
12/1998
12/24/1998DE19724925A1 Mining process for materials such as phosphates
12/24/1998DE19724924A1 Part cut mining scratching machine cutting roller
10/1998
10/13/1998US5820223 Inertization system for highwall mining
10/06/1998US5816750 For use with a continuous miner
09/1998
09/22/1998US5810447 Apparatus and method for continuous mining
08/1998
08/18/1998US5795032 Mining machine with multiple propulsion members
08/13/1998WO1998035133A1 Mining ultra thin coal seams
07/1998
07/14/1998US5779321 Swing tail assembly for miner
07/09/1998DE19700344A1 Rotating cutter loader for use in mining coal seams
07/09/1998DE19654626A1 Continuous highwall mining system for coal mine
06/1998
06/23/1998US5769503 Method and apparatus for a rotating cutting drum or arm mounted with paired opposite circular polarity antennas and resonant microstrip patch transceiver for measuring coal, trona and potash layers forward, side and around a continuous mining machine
06/18/1998DE19652512A1 Underground winning machine for seam deposits
06/11/1998WO1998025007A1 Device for damping vibrations in a part-face cutting machines
06/11/1998WO1998025006A1 Device for damping vibrations in part-face cutting machines
05/1998
05/28/1998DE19649108A1 Short front mining machine, especially for driving galleries along seam
05/22/1998WO1998021449A1 Swing tail assembly for miner
04/1998
04/22/1998CN1179371A Roller Chain rolling-pushing type cutting machine
03/1998
03/19/1998DE19637973A1 Mining roof cutter with geared lifting arrangement offers rapid, clean, in-situ maintenance and repairs
03/19/1998DE19637789A1 Planing machine for underground retrieval of coal or similar
03/19/1998DE19637226A1 Planing tool
02/1998
02/24/1998US5720527 Continuous highwall mining machine with armless conveyor
01/1998
01/29/1998WO1998003770A1 Cutting control process and device for detecting the depth of cut of kirving tools
01/20/1998US5709433 Apparatus for continuous mining
12/1997
12/24/1997WO1997048883A1 Mining machine with multiple propulsion members
12/23/1997CA2080217C Mine boring machine
12/09/1997US5695016 Auger telescoping hoist assembly and holding fork mechanism
11/1997
11/25/1997US5690392 Water supply system for a mining machine
11/20/1997DE19619657A1 Drive station for scraping equipment
11/06/1997DE19616931A1 Continuous working extraction machine
10/1997
10/09/1997WO1997037105A1 Partial cutting machine
10/09/1997WO1997037104A1 Partial cutting machine for working and advance heading purposes, in particular for use in salt mining
10/09/1997CA2250766A1 Selective cut heading machine
09/1997
09/16/1997US5667279 Power distribution system
09/02/1997US5662387 Cutter head and method for mining hard rock
07/1997
07/24/1997DE19619658A1 Drive station for mining cutter
07/15/1997US5647640 Method of operating a mining machine for seam mining
07/03/1997DE19549213A1 Mining extraction equipment for hard coal
05/1997
05/27/1997CA2075638C Launch vehicle for continuous mining apparatus
05/22/1997DE19542828A1 Continuous miller for mining coal, minerals, ore, rock or like
05/15/1997DE19541707A1 Method to breakdown coal seam by milling extracted means of defined coal plane
04/1997
04/10/1997DE19537386A1 Continuously operating mining machine with endless chain carrying cutters
03/1997
03/11/1997US5609397 Highwall mining system with driven conveyor units
02/1997
02/26/1997CN2248244Y Chain splitting type excavating machine
01/1997
01/30/1997WO1996033600A3 Apparatus and method for continuous mining
01/22/1997EP0513338B1 Launch vehicle for continuous mining apparatus
12/1996
12/11/1996EP0747572A1 Face-working machine
12/10/1996US5582466 Advance/retreat cutting miner with simple conveyor
12/05/1996DE19540362A1 Method of extracting minerals, esp. coal
11/1996
11/13/1996CN1135783A Highwall mining system
11/06/1996CN1135248A Water supply system for mining machine
10/1996
10/31/1996WO1996033600A2 Apparatus and method for continuous mining
10/22/1996US5567018 Continuous mining linear advance system
10/17/1996DE19513672A1 Chiselling device esp. for coal plane
10/17/1996DE19513448A1 Feed and extraction machine for underground mining
09/1996
09/26/1996DE19511018A1 Extraction and conveying machine of coal layers in underground mine
09/11/1996CN2235018Y Differential pressure rock drill
09/11/1996CN1130931A Highwall mining system
09/10/1996US5553926 Apparatus for mining mineral from a seam
08/1996
08/22/1996DE19504779A1 Process for extraction of raw material in seams, esp. coal
07/1996
07/11/1996WO1996021086A1 Face-working machine
06/1996
06/04/1996US5522647 Continuous highwall mining machine with armless conveyor
05/1996
05/30/1996WO1996016249A1 Apparatus and method for cutting arched opening
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