FR3728E - Iron mine prop made up of two tubes sliding one inside the other - Google Patents

Iron mine prop made up of two tubes sliding one inside the other

Info

Publication number
FR3728E
FR3728E FR3728DA FR3728E FR 3728 E FR3728 E FR 3728E FR 3728D A FR3728D A FR 3728DA FR 3728 E FR3728 E FR 3728E
Authority
FR
France
Prior art keywords
iron mine
mine prop
tubes sliding
prop made
tubes
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 Sommer
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 FR3728E publication Critical patent/FR3728E/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
    • E21D15/325—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 by a clamping 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)
FR3728D 1902-10-23 1904-09-19 Iron mine prop made up of two tubes sliding one inside the other Expired FR3728E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR325550T 1902-10-23
FR3728T 1904-09-19

Publications (1)

Publication Number Publication Date
FR3728E true FR3728E (en) 1905-02-21

Family

ID=1346838

Family Applications (1)

Application Number Title Priority Date Filing Date
FR3728D Expired FR3728E (en) 1902-10-23 1904-09-19 Iron mine prop made up of two tubes sliding one inside the other

Country Status (1)

Country Link
FR (1) FR3728E (en)

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