FR823057A - two-piece prop for mines - Google Patents

two-piece prop for mines

Info

Publication number
FR823057A
FR823057A FR823057DA FR823057A FR 823057 A FR823057 A FR 823057A FR 823057D A FR823057D A FR 823057DA FR 823057 A FR823057 A FR 823057A
Authority
FR
France
Prior art keywords
mines
piece prop
prop
piece
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
Wilhelm Hinselmann
Carl Tiefenthal
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 filed Critical
Application granted granted Critical
Publication of FR823057A publication Critical patent/FR823057A/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
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)
FR823057D 1936-06-17 1937-06-15 two-piece prop for mines Expired FR823057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE823057X 1936-06-17

Publications (1)

Publication Number Publication Date
FR823057A true FR823057A (en) 1938-01-13

Family

ID=6745144

Family Applications (1)

Application Number Title Priority Date Filing Date
FR823057D Expired FR823057A (en) 1936-06-17 1937-06-15 two-piece prop for mines

Country Status (1)

Country Link
FR (1) FR823057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670170A (en) * 1950-03-22 1954-02-23 Haarmann Arnold Pit prop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670170A (en) * 1950-03-22 1954-02-23 Haarmann Arnold Pit prop

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