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
9,022,484 Material handling system for mining machine Aug 03, 12 May 05, 15 JOY MM DELAWARE, INC., JOY MM DELAWARE, INC.
9,022,697 Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling Nov 17, 11 May 05, 15 ATLAS COPCO ROCK DRILLS AB, ATLAS COPCO ROCK DRILLS AB
9,016,801 Earth pressure balance shield machine without cutter disk May 03, 12 Apr 28, 15 CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD., CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD.
9,016,983 Method for preventing shield casing jamming due to too large frictional resistance in earth pressure balance shield machine Jun 09, 11 Apr 28, 15 CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD., CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD.
9,010,870 Mining systems May 01, 14 Apr 21, 15 SENECA INDUSTRIES INC., SENECA INDUSTRIES INC.
9,010,872 Tunnel boring machine with cutterhead support assembly supporting a variable number of drive systems Jun 24, 13 Apr 21, 15 ROBBINS COMPANY, THE, THE ROBBINS COMPANY
9,010,061 Lattice girder Sep 03, 13 Apr 21, 15 BOCHUMER EISENHUTTE HEINTZMANN GMBH & CO. KG, BOCHUMER EISENHÜTTE HEINTZMANN GMBH & CO. KG

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2015/0130,256 ROLLING FRICTION OR SUSPENSION FRICTION IMPACT MINING METHOD AND WEAR-RESISTANT IMPACT MINING MACHINE USING SAID METHOD Feb 22, 13 May 14, 15 , Not available
2015/0132,068 METHOD FOR ANCHORING A DEVICE IN MULTILAYER SOIL Jan 26, 15 May 14, 15 ANCREST S.A.,
2015/0125,215 METHOD FOR CONSTRUCTING A TUNNEL COURSE, AND STRUCTURAL ELEMENT FOR USE BY THE METHOD Jun 21, 12 May 07, 15 STABINOR AS,
2015/0117,961 Method And Rock Bolting Rig For Installation Of A Rock Bolt Jun 27, 13 Apr 30, 15 ATLAS COPCO ROCK DRILLS AB,
2015/0117,962 RESIN SYSTEM AND ROCK ANCHOR Jul 26, 11 Apr 30, 15 MINOVA INTERNATIONAL LIMITED,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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