NL68863C - - Google Patents

Info

Publication number
NL68863C
NL68863C NL68863DA NL68863C NL 68863 C NL68863 C NL 68863C NL 68863D A NL68863D A NL 68863DA NL 68863 C NL68863 C NL 68863C
Authority
NL
Netherlands
Application number
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.)
Publication of NL68863C publication Critical patent/NL68863C/xx

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00Caps for supporting mine roofs
    • E21D17/02Cantilever extension or similar protecting devices
    • E21D17/08Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086Cap joints for obtaining a coal-face free of pit-props or articulated type

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)
  • Component Parts Of Construction Machinery (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
NL68863D 1948-11-19 NL68863C (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL670826X 1948-11-19

Publications (1)

Publication Number Publication Date
NL68863C true NL68863C (ja)

Family

ID=19800430

Family Applications (2)

Application Number Title Priority Date Filing Date
NL70416D NL70416C (ja) 1948-11-19
NL68863D NL68863C (ja) 1948-11-19

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL70416D NL70416C (ja) 1948-11-19

Country Status (5)

Country Link
BE (1) BE492242A (ja)
DE (1) DE815182C (ja)
FR (1) FR1003951A (ja)
GB (1) GB670826A (ja)
NL (2) NL68863C (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211574B (de) * 1958-05-30 1966-03-03 Ludwig Vanwersch Ausbaukappe fuer den Grubenbetrieb
DE1198770B (de) * 1961-02-09 1965-08-19 Heinrich Pierburg Fa Vorpfaendgelenkkappe, insbesondere fuer den Strebausbau

Also Published As

Publication number Publication date
NL70416C (ja)
GB670826A (en) 1952-04-23
DE815182C (de) 1951-10-01
BE492242A (ja)
FR1003951A (fr) 1952-03-24

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