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FR1131220A - Articulated support extension device particularly intended for mines - Google Patents

Articulated support extension device particularly intended for mines

Info

Publication number
FR1131220A
FR1131220A FR1131220DA FR1131220A FR 1131220 A FR1131220 A FR 1131220A FR 1131220D A FR1131220D A FR 1131220DA FR 1131220 A FR1131220 A FR 1131220A
Authority
FR
France
Prior art keywords
mines
extension device
particularly intended
support extension
device particularly
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)
Inventor
Emile Dambly
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 filed Critical
Application granted granted Critical
Publication of FR1131220A publication Critical patent/FR1131220A/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)
FR1131220D 1955-09-09 1955-09-09 Articulated support extension device particularly intended for mines Expired FR1131220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1131220T 1955-09-09

Publications (1)

Publication Number Publication Date
FR1131220A true FR1131220A (en) 1957-02-19

Family

ID=9637760

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1131220D Expired FR1131220A (en) 1955-09-09 1955-09-09 Articulated support extension device particularly intended for mines

Country Status (1)

Country Link
FR (1) FR1131220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163011A (en) * 1960-11-14 1964-12-29 Karl M Groetschel Connection for lagging irons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163011A (en) * 1960-11-14 1964-12-29 Karl M Groetschel Connection for lagging irons

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