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Publication date
Application filedfiledCritical
Publication of DE2025293A1publicationCriticalpatent/DE2025293A1/de
Application grantedgrantedCritical
Publication of DE2025293C2publicationCriticalpatent/DE2025293C2/de
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
E21D23/26—Hydraulic or pneumatic control
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)
Mechanically-Actuated Valves
(AREA)
Lining And Supports For Tunnels
(AREA)
Multiple-Way Valves
(AREA)
DE197020252931969-05-281970-05-23Fernsteuerung, insbesondere für Grubenausbauelemente
ExpiredDE2025293C2
(de)