PL71123B1 - - Google Patents

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Publication number
PL71123B1
PL71123B1 PL14760371A PL14760371A PL71123B1 PL 71123 B1 PL71123 B1 PL 71123B1 PL 14760371 A PL14760371 A PL 14760371A PL 14760371 A PL14760371 A PL 14760371A PL 71123 B1 PL71123 B1 PL 71123B1
Authority
PL
Poland
Prior art keywords
section
sliding
attached
actuator
piston rod
Prior art date
Application number
PL14760371A
Other languages
English (en)
Polish (pl)
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 PL71123B1 publication Critical patent/PL71123B1/pl

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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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Actuator (AREA)
PL14760371A 1970-04-18 1971-04-16 PL71123B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2018747 1970-04-18

Publications (1)

Publication Number Publication Date
PL71123B1 true PL71123B1 (enrdf_load_stackoverflow) 1974-04-30

Family

ID=5768480

Family Applications (1)

Application Number Title Priority Date Filing Date
PL14760371A PL71123B1 (enrdf_load_stackoverflow) 1970-04-18 1971-04-16

Country Status (3)

Country Link
GB (1) GB1330115A (enrdf_load_stackoverflow)
HU (1) HU163276B (enrdf_load_stackoverflow)
PL (1) PL71123B1 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
HU163276B (enrdf_load_stackoverflow) 1973-07-28
GB1330115A (en) 1973-09-12

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