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.)
HEMSCHEIDT MASCHINENFABR
Original Assignee
HEMSCHEIDT MASCHINENFABR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19681583799external-prioritypatent/DE1583799B2/de
Application filed by HEMSCHEIDT MASCHINENFABRfiledCriticalHEMSCHEIDT MASCHINENFABR
Publication of FR2002432A1publicationCriticalpatent/FR2002432A1/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
E21D23/08—Advancing mechanisms
E21D23/081—Advancing mechanisms forming parts of the roof supports
E21D23/085—Advancing mechanisms forming parts of the roof supports acting on a conveyor or a guide for the mining machine
