DE2025293A1 - - Google Patents

Info

Publication number
DE2025293A1
DE2025293A1 DE19702025293 DE2025293A DE2025293A1 DE 2025293 A1 DE2025293 A1 DE 2025293A1 DE 19702025293 DE19702025293 DE 19702025293 DE 2025293 A DE2025293 A DE 2025293A DE 2025293 A1 DE2025293 A1 DE 2025293A1
Authority
DE
Germany
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.)
Granted
Application number
DE19702025293
Other languages
German (de)
Other versions
DE2025293C2 (de
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
Application filed filed Critical
Publication of DE2025293A1 publication Critical patent/DE2025293A1/de
Application granted granted Critical
Publication of DE2025293C2 publication Critical patent/DE2025293C2/de
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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

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)
DE19702025293 1969-05-28 1970-05-23 Fernsteuerung, insbesondere für Grubenausbauelemente Expired DE2025293C2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2687269 1969-05-28
GB2687269 1969-05-28

Publications (2)

Publication Number Publication Date
DE2025293A1 true DE2025293A1 (cs) 1972-03-09
DE2025293C2 DE2025293C2 (de) 1976-08-26

Family

ID=

Also Published As

Publication number Publication date
US3661056A (en) 1972-05-09
GB1295079A (cs) 1972-11-01
PL72769B1 (cs) 1974-08-30
ZA703511B (en) 1971-01-27
CA919925A (en) 1973-01-30
FR2048819A5 (cs) 1971-03-19
JPS5126362B1 (cs) 1976-08-06

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee