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

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Patent #TitleFiling DateIssue DatePatent Owner
8,783,786 Cutter assembly for tunnel boring machine with pressure compensation Feb 16, 12 Jul 22, 14 , THE ROBBINS COMPANY
8,764,349 Gob shield for shield support and method for the production thereof Jul 01, 10 Jul 01, 14 CATERPILLAR GLOBAL MINING EUROPE GMBH, CATERPILLAR GLOBAL MINING EUROPE GMBH
8,763,344 Method for erecting an underground construction Apr 07, 10 Jul 01, 14 HERREKNECHT AG, HERREKNECHT AG

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Recent Publications

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Publication #TitleFiling DatePub DatePatent Owner
2014/0193,204 TUBBING HAVING A THERMOPLASTIC SEALING LAYER Mar 12, 14 Jul 10, 14 SIKA TECHNOLOGY AG,
2014/0178,133 Oval Pan and Pan System for Rib and Roof Surface Control in Subterranean Excavation Applications Oct 04, 13 Jun 26, 14 ,

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Patents Filed in This Class - By Year

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