FR10447E - Artificial mine prop - Google Patents

Artificial mine prop

Info

Publication number
FR10447E
FR10447E FR10447DA FR10447E FR 10447 E FR10447 E FR 10447E FR 10447D A FR10447D A FR 10447DA FR 10447 E FR10447 E FR 10447E
Authority
FR
France
Prior art keywords
mine prop
artificial
artificial mine
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)
Inventor
Friedrich Nellen
Albert Voigt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR10447E publication Critical patent/FR10447E/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
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium 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)
FR10447D 1907-03-13 1908-12-15 Artificial mine prop Expired FR10447E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR376032T 1907-03-13
FR10447T 1908-12-15

Publications (1)

Publication Number Publication Date
FR10447E true FR10447E (en) 1909-07-03

Family

ID=1352888

Family Applications (1)

Application Number Title Priority Date Filing Date
FR10447D Expired FR10447E (en) 1907-03-13 1908-12-15 Artificial mine prop

Country Status (1)

Country Link
FR (1) FR10447E (en)

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