NL86396C - - Google Patents

Info

Publication number
NL86396C
NL86396C NL86396DA NL86396C NL 86396 C NL86396 C NL 86396C NL 86396D A NL86396D A NL 86396DA NL 86396 C NL86396 C NL 86396C
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 NL86396C publication Critical patent/NL86396C/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)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
NL86396D 1950-03-04 NL86396C (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV643A DE974877C (de) 1950-03-04 1950-03-04 Kappenverbindung fuer den Strebausbau im Grubenbetrieb unter Tage

Publications (1)

Publication Number Publication Date
NL86396C true NL86396C (fr)

Family

ID=7569206

Family Applications (1)

Application Number Title Priority Date Filing Date
NL86396D NL86396C (fr) 1950-03-04

Country Status (3)

Country Link
BE (1) BE501546A (fr)
DE (1) DE974877C (fr)
NL (1) NL86396C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU32099A1 (fr) * 1952-05-31
GB785063A (en) * 1955-04-07 1957-10-23 Josef Brand Connection for lagging irons for use in mines

Also Published As

Publication number Publication date
DE974877C (de) 1961-05-25
BE501546A (fr)

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