FR878251A - étançon métallique de bauteur réglable utilisable notamment dans les mines - Google Patents

étançon métallique de bauteur réglable utilisable notamment dans les mines

Info

Publication number
FR878251A
FR878251A FR878251DA FR878251A FR 878251 A FR878251 A FR 878251A FR 878251D A FR878251D A FR 878251DA FR 878251 A FR878251 A FR 878251A
Authority
FR
France
Prior art keywords
mines
usable
adjustable metal
metal prop
prop
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
Paul Goupil
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 FR878251A publication Critical patent/FR878251A/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
    • E21D15/28—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)
FR878251D 1941-08-23 1941-08-23 étançon métallique de bauteur réglable utilisable notamment dans les mines Expired FR878251A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR878251T 1941-08-23

Publications (1)

Publication Number Publication Date
FR878251A true FR878251A (fr) 1943-01-15

Family

ID=9361331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR878251D Expired FR878251A (fr) 1941-08-23 1941-08-23 étançon métallique de bauteur réglable utilisable notamment dans les mines

Country Status (1)

Country Link
FR (1) FR878251A (fr)

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