E21D

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Description

SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)

Recent Patents

Not Available
Patent #TitleFiling DateIssue DatePatent Owner
8,807,877 Tensionable spiral bolt with resin nut and related methods Sep 21, 09 Aug 19, 14 , RHINO TECHNOLOGIES LLC
8,801,336 Rock bolt Dec 06, 12 Aug 12, 14 , RSC MINING (PTY) LTD
8,801,337 Method of using a dome headed roof bolt Mar 20, 13 Aug 12, 14 DSI UNDERGROUND SYSTEMS, INC., DSI UNDERGROUND SYSTEMS, INC.
8,801,338 Nested mine roof supports Nov 26, 12 Aug 12, 14 MICON, MICON
8,795,777 Mine shaft liner plate system and method Feb 28, 12 Aug 05, 14 CONTECH ENGINEERED SOLUTIONS LLC, CONTECH ENGINEERED SOLUTIONS LLC
8,790,044 Tensionable tubular resin anchored tubular bolt and method Jun 30, 10 Jul 29, 14 F. M. LOCOTOS CO., INC., F. M. LOCOTOS CO. INC.
8,789,890 Abrasion detecting apparatus detecting abrasion of component of cutter head and tunnel boring machine including abrasion detecting apparatus Jul 27, 10 Jul 29, 14 KAWASAKI JUKOGYO KABUSHIKI KAISHA, KAWASAKI JUKOGYO KABUSHIKI KAISHA
8,783,786 Cutter assembly for tunnel boring machine with pressure compensation Feb 16, 12 Jul 22, 14 ROBBINS COMPANY, THE, THE ROBBINS COMPANY

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2014/0227,042 CONSTANT-RESISTANCE AND LARGE DEFORMATION ANCHOR CABLE AND CONSTANT-RESISTANCE DEVICE Jun 13, 11 Aug 14, 14 , CHINA UNIVERSITY OF MINING & TECHNOLOGY (BEIJING)
2014/0227,043 APPARATUS AND METHOD FOR INSTALLING GROUND ANCHORING SYSTEMS Apr 22, 14 Aug 14, 14 , Not available
2014/0217,805 DRILL BIT EXCHANGE DEVICE FOR SHIELD TUNNELING MACHINE Aug 23, 12 Aug 07, 14 , HITACHI ZOSEN CORPORATION
2014/0219,725 TUNNELING APPARATUS May 31, 12 Aug 07, 14 VERMEER MANUFACTURING COMPANY,

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