NL111909C - - Google Patents

Info

Publication number
NL111909C
NL111909C NL111909DA NL111909C NL 111909 C NL111909 C NL 111909C NL 111909D A NL111909D A NL 111909DA NL 111909 C NL111909 C NL 111909C
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 NL111909C publication Critical patent/NL111909C/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap 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)
  • Heat Sensitive Colour Forming Recording (AREA)
NL111909D 1954-08-19 NL111909C (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE799739X 1954-08-19

Publications (1)

Publication Number Publication Date
NL111909C true NL111909C (enrdf_load_html_response)

Family

ID=6711673

Family Applications (1)

Application Number Title Priority Date Filing Date
NL111909D NL111909C (enrdf_load_html_response) 1954-08-19

Country Status (4)

Country Link
BE (1) BE540613A (enrdf_load_html_response)
FR (1) FR1135845A (enrdf_load_html_response)
GB (1) GB799739A (enrdf_load_html_response)
NL (1) NL111909C (enrdf_load_html_response)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499766A (enrdf_load_html_response) * 1948-07-08
DE1218382B (de) * 1958-03-18 1966-06-08 Hermann Schwarz Kommanditgesel Zugfeste Verbindung fuer gelenkig verbundene Kappen im Strebausbau
US3043108A (en) * 1958-07-16 1962-07-10 Vanwersch Aloys Mine roof bar arrangement

Also Published As

Publication number Publication date
GB799739A (en) 1958-08-13
BE540613A (enrdf_load_html_response)
FR1135845A (fr) 1957-05-03

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