E21C 25/18

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9556733 Tunnel boring machine disc cutters and related methods of manufactureMar 08, 13Jan 31, 17US SYNTHETIC CORPORATION
9487933 Cutting blade apparatus and methodsMar 22, 12Nov 08, 16Not available
9353622 Mining machine with driven disc cuttersMay 19, 14May 31, 16JOY MM DELAWARE, INC.
8636324 Mining machine with driven disc cuttersJan 22, 10Jan 28, 14JOY MM DELAWARE, INC.
6158818 Rock cutting headNov 05, 97Dec 12, 00TEREX DEMAG GMBH, Schaeff-Terex GmbH & Co. KG,
5626399 Apparatus for cutting and excavating solidsFeb 08, 95May 06, 97THE UNIVERSITY OF QUEENSLAND
5341889 Ring clamp for a cutter ring in a tunnel drilling machineOct 21, 92Aug 30, 94Stein Narvestad A.S.
5253723 Ring cutter for tunnel drilling in rockJul 30, 92Oct 19, 93Not available
4717205 CutterJun 16, 86Jan 05, 88Not available