FR8280E - Étancon de mines artificiel - Google Patents

Étancon de mines artificiel

Info

Publication number
FR8280E
FR8280E FR8280DA FR8280E FR 8280 E FR8280 E FR 8280E FR 8280D A FR8280D A FR 8280DA FR 8280 E FR8280 E FR 8280E
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
English (en)
Inventor
Friedrich Nellen
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 FR8280E publication Critical patent/FR8280E/fr
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)
FR8280D 1907-03-13 1907-10-05 Étancon de mines artificiel Expired FR8280E (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR376032T 1907-03-13
FR8280T 1907-10-05

Publications (1)

Publication Number Publication Date
FR8280E true FR8280E (fr) 1908-02-20

Family

ID=1350975

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8280D Expired FR8280E (fr) 1907-03-13 1907-10-05 Étancon de mines artificiel

Country Status (1)

Country Link
FR (1) FR8280E (fr)

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