FR981251A - mining prop - Google Patents

mining prop

Info

Publication number
FR981251A
FR981251A FR981251DA FR981251A FR 981251 A FR981251 A FR 981251A FR 981251D A FR981251D A FR 981251DA FR 981251 A FR981251 A FR 981251A
Authority
FR
France
Prior art keywords
mining prop
prop
mining
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.)
Forges & Acieries Du Nord Et D
Original Assignee
Forges & Acieries Du Nord Et D
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 Forges & Acieries Du Nord Et D filed Critical Forges & Acieries Du Nord Et D
Application granted granted Critical
Publication of FR981251A publication Critical patent/FR981251A/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
    • E21D15/36—Telescopic props with parts held relatively to each other by friction or gripping by a tiltable collar surrounding one or both parts

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)
FR981251D 1943-03-23 1943-03-23 mining prop Expired FR981251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR981251T 1943-03-23

Publications (1)

Publication Number Publication Date
FR981251A true FR981251A (en) 1951-05-24

Family

ID=9531256

Family Applications (1)

Application Number Title Priority Date Filing Date
FR981251D Expired FR981251A (en) 1943-03-23 1943-03-23 mining prop

Country Status (1)

Country Link
FR (1) FR981251A (en)

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