NL74504C - - Google Patents

Info

Publication number
NL74504C
NL74504C NL74504DA NL74504C NL 74504 C NL74504 C NL 74504C NL 74504D A NL74504D A NL 74504DA NL 74504 C NL74504 C NL 74504C
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 NL74504C publication Critical patent/NL74504C/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)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Photographic Developing Apparatuses (AREA)
NL74504D 1950-01-18 NL74504C (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV374A DE833937C (de) 1950-01-18 1950-01-18 Kappenverbindung fuer den Strebausbau

Publications (1)

Publication Number Publication Date
NL74504C true NL74504C (enrdf_load_html_response)

Family

ID=7569069

Family Applications (1)

Application Number Title Priority Date Filing Date
NL74504D NL74504C (enrdf_load_html_response) 1950-01-18

Country Status (4)

Country Link
BE (1) BE502211A (enrdf_load_html_response)
DE (1) DE833937C (enrdf_load_html_response)
FR (1) FR1035841A (enrdf_load_html_response)
NL (1) NL74504C (enrdf_load_html_response)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499766A (enrdf_load_html_response) * 1948-07-08
DE977597C (de) * 1950-11-01 1967-06-22 Ludwig Vanwersch Ausbaukappe
DE1097388B (de) * 1952-05-29 1961-01-19 Aloys Vanwersch Kappenverbindung fuer den Strebausbau
DE1188024B (de) * 1952-10-06 1965-03-04 Aloys Vanwersch Kappenverbindung fuer den Strebausbau

Also Published As

Publication number Publication date
FR1035841A (fr) 1953-08-31
BE502211A (enrdf_load_html_response)
DE833937C (de) 1952-03-13

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