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Electro Hydraulics Ltd
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Electro Hydraulics Ltd
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Application filed by Electro Hydraulics LtdfiledCriticalElectro Hydraulics Ltd
Priority to FR30010ApriorityCriticalpatent/FR1446041A/fr
Application grantedgrantedCritical
Publication of FR1446041ApublicationCriticalpatent/FR1446041A/fr
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
E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
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Engineering & Computer Science
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Mining & Mineral Resources
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Life Sciences & Earth Sciences
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General Life Sciences & Earth Sciences
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Geochemistry & Mineralogy
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Geology
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FR30010A1965-08-311965-08-31Dispositif de commande pour l'avance automatique d'éléments de soutènement de toit de mine
ExpiredFR1446041A
(fr)