FR1079257A - Expansion bolt, especially for roofs in mines - Google Patents

Expansion bolt, especially for roofs in mines

Info

Publication number
FR1079257A
FR1079257A FR1079257DA FR1079257A FR 1079257 A FR1079257 A FR 1079257A FR 1079257D A FR1079257D A FR 1079257DA FR 1079257 A FR1079257 A FR 1079257A
Authority
FR
France
Prior art keywords
mines
roofs
expansion bolt
bolt
expansion
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
Joseph Bertrand Dempsey
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 FR1079257A publication Critical patent/FR1079257A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/008—Anchoring or tensioning means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR1079257D 1952-05-01 1953-04-30 Expansion bolt, especially for roofs in mines Expired FR1079257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1079257XA 1952-05-01 1952-05-01

Publications (1)

Publication Number Publication Date
FR1079257A true FR1079257A (en) 1954-11-29

Family

ID=22319200

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1079257D Expired FR1079257A (en) 1952-05-01 1953-04-30 Expansion bolt, especially for roofs in mines

Country Status (1)

Country Link
FR (1) FR1079257A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111997674A (en) * 2020-09-25 2020-11-27 何双龙 Anti-collapse device for anchor rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111997674A (en) * 2020-09-25 2020-11-27 何双龙 Anti-collapse device for anchor rod

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