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FR1049267A - étançon métallique et télescopique - Google Patents

étançon métallique et télescopique

Info

Publication number
FR1049267A
FR1049267A FR1049267DA FR1049267A FR 1049267 A FR1049267 A FR 1049267A FR 1049267D A FR1049267D A FR 1049267DA FR 1049267 A FR1049267 A FR 1049267A
Authority
FR
France
Prior art keywords
metal
telescopic prop
prop
telescopic
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)
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Application granted granted Critical
Publication of FR1049267A publication Critical patent/FR1049267A/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
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction

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)
FR1049267D 1950-01-31 1951-01-26 étançon métallique et télescopique Expired FR1049267A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1049267X 1950-01-31

Publications (1)

Publication Number Publication Date
FR1049267A true FR1049267A (fr) 1953-12-29

Family

ID=19867821

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1049267D Expired FR1049267A (fr) 1950-01-31 1951-01-26 étançon métallique et télescopique

Country Status (1)

Country Link
FR (1) FR1049267A (fr)

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