FR60718E - steel mine prop - Google Patents

steel mine prop

Info

Publication number
FR60718E
FR60718E FR60718DA FR60718E FR 60718 E FR60718 E FR 60718E FR 60718D A FR60718D A FR 60718DA FR 60718 E FR60718 E FR 60718E
Authority
FR
France
Prior art keywords
mine prop
steel mine
steel
prop
mine
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.)
RECH S IND ET MINIERES SOC ET
Original Assignee
RECH S IND ET MINIERES SOC ET
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 RECH S IND ET MINIERES SOC ET filed Critical RECH S IND ET MINIERES SOC ET
Application granted granted Critical
Publication of FR60718E publication Critical patent/FR60718E/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR60718D 1949-01-25 1949-01-25 steel mine prop Expired FR60718E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR60718T 1949-01-25

Publications (1)

Publication Number Publication Date
FR60718E true FR60718E (en) 1955-01-25

Family

ID=8694392

Family Applications (1)

Application Number Title Priority Date Filing Date
FR60718D Expired FR60718E (en) 1949-01-25 1949-01-25 steel mine prop

Country Status (1)

Country Link
FR (1) FR60718E (en)

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