BE484433A - - Google Patents

Info

Publication number
BE484433A
BE484433A BE484433DA BE484433A BE 484433 A BE484433 A BE 484433A BE 484433D A BE484433D A BE 484433DA BE 484433 A BE484433 A BE 484433A
Authority
BE
Belgium
Prior art keywords
prop
perforations
wings
section
metal
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE484433A publication Critical patent/BE484433A/fr

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)
  • Adornments (AREA)
BE484433D BE484433A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE484433A true BE484433A (enrdf_load_stackoverflow)

Family

ID=130590

Family Applications (1)

Application Number Title Priority Date Filing Date
BE484433D BE484433A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE484433A (enrdf_load_stackoverflow)

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