FR991519A - Temporary assembly device for supporting elements - Google Patents

Temporary assembly device for supporting elements

Info

Publication number
FR991519A
FR991519A FR991519DA FR991519A FR 991519 A FR991519 A FR 991519A FR 991519D A FR991519D A FR 991519DA FR 991519 A FR991519 A FR 991519A
Authority
FR
France
Prior art keywords
supporting elements
assembly device
temporary assembly
temporary
supporting
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Muller & Borggrafe
Original Assignee
Muller & Borggrafe
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.)
Filing date
Publication date
Application filed by Muller & Borggrafe filed Critical Muller & Borggrafe
Application granted granted Critical
Publication of FR991519A publication Critical patent/FR991519A/en
Expired legal-status Critical Current

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)
FR991519D 1949-07-30 1949-07-30 Temporary assembly device for supporting elements Expired FR991519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR991519T 1949-07-30

Publications (1)

Publication Number Publication Date
FR991519A true FR991519A (en) 1951-10-08

Family

ID=9552793

Family Applications (1)

Application Number Title Priority Date Filing Date
FR991519D Expired FR991519A (en) 1949-07-30 1949-07-30 Temporary assembly device for supporting elements

Country Status (1)

Country Link
FR (1) FR991519A (en)

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