FR752230A - étançon démontable - Google Patents

étançon démontable

Info

Publication number
FR752230A
FR752230A FR752230DA FR752230A FR 752230 A FR752230 A FR 752230A FR 752230D A FR752230D A FR 752230DA FR 752230 A FR752230 A FR 752230A
Authority
FR
France
Prior art keywords
prop
removable
removable 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)
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.)
DU NORD de la FRANCE ET DES MU
Original Assignee
DU NORD de la FRANCE ET DES MU
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 DU NORD de la FRANCE ET DES MU filed Critical DU NORD de la FRANCE ET DES MU
Application granted granted Critical
Publication of FR752230A publication Critical patent/FR752230A/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
    • E21D15/02—Non-telescopic props
    • E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
    • E21D15/12—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with locking devices located near head or foot

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)
FR752230D 1933-03-10 1933-03-10 étançon démontable Expired FR752230A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR752230T 1933-03-10

Publications (1)

Publication Number Publication Date
FR752230A true FR752230A (fr) 1933-09-19

Family

ID=9157991

Family Applications (1)

Application Number Title Priority Date Filing Date
FR752230D Expired FR752230A (fr) 1933-03-10 1933-03-10 étançon démontable

Country Status (1)

Country Link
FR (1) FR752230A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676972A (en) * 1969-08-01 1972-07-18 Clayton R Ballou Shoring structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676972A (en) * 1969-08-01 1972-07-18 Clayton R Ballou Shoring structure

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