FR917343A - metal props - Google Patents

metal props

Info

Publication number
FR917343A
FR917343A FR917343DA FR917343A FR 917343 A FR917343 A FR 917343A FR 917343D A FR917343D A FR 917343DA FR 917343 A FR917343 A FR 917343A
Authority
FR
France
Prior art keywords
metal props
props
metal
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)
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.)
PORTE ET GARDIN
Original Assignee
PORTE ET GARDIN
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 PORTE ET GARDIN filed Critical PORTE ET GARDIN
Application granted granted Critical
Publication of FR917343A publication Critical patent/FR917343A/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)
FR917343D 1945-07-13 1945-07-13 metal props Expired FR917343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR917343T 1945-07-13

Publications (1)

Publication Number Publication Date
FR917343A true FR917343A (en) 1947-01-03

Family

ID=9423753

Family Applications (1)

Application Number Title Priority Date Filing Date
FR917343D Expired FR917343A (en) 1945-07-13 1945-07-13 metal props

Country Status (1)

Country Link
FR (1) FR917343A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975699C (en) * 1950-03-16 1962-05-30 Niederlaendischer Staat Resilient metal pit stamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975699C (en) * 1950-03-16 1962-05-30 Niederlaendischer Staat Resilient metal pit stamp

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