Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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Filing date
Publication date
Application filed by Gewerkschaft Eisenhutte Westfalia GmbHfiledCriticalGewerkschaft Eisenhutte Westfalia GmbH
Application grantedgrantedCritical
Publication of AU6004873ApublicationCriticalpatent/AU6004873A/en
Publication of AU484497B2publicationCriticalpatent/AU484497B2/en
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
Landscapes
Engineering & Computer Science
(AREA)
Mining & Mineral Resources
(AREA)
Life Sciences & Earth Sciences
(AREA)
General Life Sciences & Earth Sciences
(AREA)
Geochemistry & Mineralogy
(AREA)
Geology
(AREA)
Lifting Devices For Agricultural Implements
(AREA)
Fluid-Pressure Circuits
(AREA)
AU60048/73A1972-09-141973-09-05Improvements in or relating to mine roof chocks
ExpiredAU484497B2
(en)