Gebr. Eickhoff Maschinenfabrik und Eisengiesserei mbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5171105 Process and device for lining tunnels and ducts having circular and non-circular cross-sections, especially for canal and tunnel constructionExpiredJan 22, 92Dec 15, 92[E21D]
5076729 Tunnel-driving and support systemExpiredJun 22, 90Dec 31, 91[E21D]
5051033 Bracing device for a self-advancing shield tunnelling machineExpiredAug 15, 90Sep 24, 91[E21D]
4955668 Drum cutter-loader equipped with an auxiliary drumExpiredJun 08, 89Sep 11, 90[E21C]
4944558 Drum cutter-loader for underground miningExpiredJun 16, 89Jul 31, 90[F21C]
4943120 Force transmitting housing for longwall mining machineExpiredMay 27, 88Jul 24, 90[E21C]
4898428 Power supply system for an underground mining machineExpiredAug 05, 88Feb 06, 90[E21C]
4896920 Drum-cutter mining machineExpiredMay 13, 88Jan 30, 90[E21C]
4889393 Drum cutter-loader for underground mining machineExpiredOct 24, 88Dec 26, 89[F21C]
4883323 Longwall mining machine for the mining of thick mineral seamsExpiredOct 24, 88Nov 28, 89[E21B]
4870697 Two-way communication system for winning machines in underground miningExpiredAug 17, 87Sep 26, 89[H01B, E21C]
4850648 Gear rack for driving or guiding a drum cutter loaderExpiredOct 11, 88Jul 25, 89[E21C]
4828326 Shearer loader for underground mining operationExpiredJul 24, 87May 09, 89[E21C]
4813747 Rack assembly for advancing a winning machineExpiredSep 02, 87Mar 21, 89[E21C]
4796143 Electric transformer for underground mining machineExpiredFeb 29, 88Jan 03, 89[H01F, H02H]
4773710 Rack device for advancing a mining machineExpiredJul 14, 87Sep 27, 88[E21C]
4733914 Apparatus to deliver high pressure liquid from nozzles on a shearer drum for a mining machineExpiredSep 19, 85Mar 29, 88[E21C]
4691967 Apparatus for controlling the discharge of pressurized liquid from nozzles on a cutting drum of a mining machineExpiredOct 31, 85Sep 08, 87[E21F, E21C]
4615565 Tunnel or road headerExpiredJul 30, 84Oct 07, 86[E21C]
4565410 Apparatus for controlling the supply of high-pressure liquid to a cutter drum assemblyExpiredDec 09, 83Jan 21, 86[E21F, E21C]

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