NL74988C - - Google Patents

Info

Publication number
NL74988C
NL74988C NL74988DA NL74988C NL 74988 C NL74988 C NL 74988C NL 74988D A NL74988D A NL 74988DA NL 74988 C NL74988 C NL 74988C
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 NL74988C publication Critical patent/NL74988C/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)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
NL74988D 1949-09-30 NL74988C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP56413A DE829436C (de) 1949-09-30 1949-09-30 Stahlkappenverbindung fuer den Strebausbau im Grubenbetrieb

Publications (1)

Publication Number Publication Date
NL74988C true NL74988C (enrdf_load_stackoverflow)

Family

ID=7388420

Family Applications (1)

Application Number Title Priority Date Filing Date
NL74988D NL74988C (enrdf_load_stackoverflow) 1949-09-30

Country Status (3)

Country Link
BE (1) BE500611A (enrdf_load_stackoverflow)
DE (1) DE829436C (enrdf_load_stackoverflow)
NL (1) NL74988C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991097A (en) * 1948-07-08 1961-07-04 Vanwersch Aloys Connecting structure for beams of a roof support or the like

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097388B (de) * 1952-05-29 1961-01-19 Aloys Vanwersch Kappenverbindung fuer den Strebausbau

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991097A (en) * 1948-07-08 1961-07-04 Vanwersch Aloys Connecting structure for beams of a roof support or the like

Also Published As

Publication number Publication date
DE829436C (de) 1952-01-24
BE500611A (enrdf_load_stackoverflow)

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