FR1389393A - Device for mining - Google Patents

Device for mining

Info

Publication number
FR1389393A
FR1389393A FR971757A FR971757A FR1389393A FR 1389393 A FR1389393 A FR 1389393A FR 971757 A FR971757 A FR 971757A FR 971757 A FR971757 A FR 971757A FR 1389393 A FR1389393 A FR 1389393A
Authority
FR
France
Prior art keywords
mining
Prior art date
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.)
Expired
Application number
FR971757A
Other languages
French (fr)
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment Ltd
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 GB15826/63A external-priority patent/GB996137A/en
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to FR971757A priority Critical patent/FR1389393A/en
Application granted granted Critical
Publication of FR1389393A publication Critical patent/FR1389393A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • 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
FR971757A 1963-04-22 1964-04-21 Device for mining Expired FR1389393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR971757A FR1389393A (en) 1963-04-22 1964-04-21 Device for mining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB15826/63A GB996137A (en) 1963-04-22 1963-04-22 Mining apparatus
FR971757A FR1389393A (en) 1963-04-22 1964-04-21 Device for mining

Publications (1)

Publication Number Publication Date
FR1389393A true FR1389393A (en) 1965-02-12

Family

ID=26207186

Family Applications (1)

Application Number Title Priority Date Filing Date
FR971757A Expired FR1389393A (en) 1963-04-22 1964-04-21 Device for mining

Country Status (1)

Country Link
FR (1) FR1389393A (en)

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