FR990112A - étançon de mine en fer - Google Patents

étançon de mine en fer

Info

Publication number
FR990112A
FR990112A FR990112DA FR990112A FR 990112 A FR990112 A FR 990112A FR 990112D A FR990112D A FR 990112DA FR 990112 A FR990112 A FR 990112A
Authority
FR
France
Prior art keywords
iron mine
mine prop
prop
iron
mine
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
Hans Gerlach
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 FR990112A publication Critical patent/FR990112A/fr
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/28Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/40Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted

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)
FR990112D 1949-06-01 1949-07-05 étançon de mine en fer Expired FR990112A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE990112X 1949-06-01

Publications (1)

Publication Number Publication Date
FR990112A true FR990112A (fr) 1951-09-18

Family

ID=6918823

Family Applications (1)

Application Number Title Priority Date Filing Date
FR990112D Expired FR990112A (fr) 1949-06-01 1949-07-05 étançon de mine en fer

Country Status (1)

Country Link
FR (1) FR990112A (fr)

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