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)

Subclasses

Not Available
Subclass Title
1/00 Sinking shafts
1/02 Sinking shafts by hand
1/03 Sinking shafts mechanically (E21D 1/08 takes precedence)
1/04 Sinking shafts mechanically (E21D 1/08 takes precedence) with grabs
1/06 Sinking shafts mechanically (E21D 1/08 takes precedence) with shaft-boring cutters (drilling machines E21B)

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Recent Patents

Not Available
Patent #TitleFiling DateIssue DatePatent Owner
8,960,807 Hydraulic circuit for longwall mining Jun 18, 10 Feb 24, 15 TIEFENBACH CONTROL SYSTEMS GMBH, TIEFENBACH CONTROL SYSTEMS GMBH
8,955,919 Dust suppression arrangement for heavy excavation equipment Mar 05, 10 Feb 17, 15 VERMEER MANUFACTURING COMPANY, VERMEER MANUFACTURING COMPANY
8,956,082 Rock bolting system, method of installing rock bolts, and flexible bolt centralizer Oct 23, 12 Feb 17, 15 1311854 ONTARIO LIMITED, 1311854 ONTARIO LIMITED
8,950,945 Roller bearing for a tunneller Jul 02, 13 Feb 10, 15 AKTIEBOLAGET SKF, AKTIEBOLAGET SKF
8,950,511 Apparatus and method for installing ground anchoring systems Apr 22, 14 Feb 10, 15 AKTIEBOLAGET SKF, Not available
8,950,823 Method and device for working rock Jan 26, 11 Feb 10, 15 ATLAS COPCO CRAELIUS AB, ATLAS COPCO CRAELIUS AB

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2015/0056,023 MINE ROOF AND RIB SUPPORT Aug 21, 14 Feb 26, 15 DSI UNDERGROUND SYSTEMS, INC.,
2015/0050,088 TUNNELING OR EXTRACTION MACHINE WITH AN ANCHOR-SETTING DEVICE AND SUPPORT MANIPULATOR OR SUPPORTING DEVICE Jan 24, 13 Feb 19, 15 SANDVIK MINING AND CONSTRUCTION G.M.B.H.,
2015/0042,145 METHOD AND APPARATUS FOR INTRODUCING OR SINKING CAVITIES IN ROCK Mar 15, 13 Feb 12, 15 ,
2015/0042,146 Earth Pressure Balance Shield Machine without Cutter Disk May 03, 12 Feb 12, 15 CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO. LTD.,
2015/0043,976 STRAND, CABLE BOLT AND ITS INSTALLATION Mar 01, 13 Feb 12, 15 NV BEKAERT SA,
2015/0043,978 ROOF BOLTER Mar 05, 13 Feb 12, 15 RAMBOR PTY LIMITED,
2015/0034,254 REMOVABLE BARRIER FOR PROTECTING TUNNELS AND OTHER STRUCTURES FROM FLOODING AND OTHER HAZARDS Jul 29, 14 Feb 05, 15 ,
2015/0034,392 DUST COLLECTION SYSTEM FOR A MACHINE Jul 31, 13 Feb 05, 15 CATERPILLAR GLOBAL MINING AMERICA LLC,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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