FR1009191A - metal prop - Google Patents

metal prop

Info

Publication number
FR1009191A
FR1009191A FR1009191DA FR1009191A FR 1009191 A FR1009191 A FR 1009191A FR 1009191D A FR1009191D A FR 1009191DA FR 1009191 A FR1009191 A FR 1009191A
Authority
FR
France
Prior art keywords
metal prop
prop
metal
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.)
Jadot Freres SA Des Ets
Original Assignee
Jadot Freres SA Des Ets
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 Jadot Freres SA Des Ets filed Critical Jadot Freres SA Des Ets
Application granted granted Critical
Publication of FR1009191A publication Critical patent/FR1009191A/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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
    • E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure

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)
FR1009191D 1947-02-12 1947-04-11 metal prop Expired FR1009191A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE1009191X 1947-02-12

Publications (1)

Publication Number Publication Date
FR1009191A true FR1009191A (en) 1952-05-26

Family

ID=3892379

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1009191D Expired FR1009191A (en) 1947-02-12 1947-04-11 metal prop

Country Status (1)

Country Link
FR (1) FR1009191A (en)

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