BE476217A - - Google Patents

Info

Publication number
BE476217A
BE476217A BE476217DA BE476217A BE 476217 A BE476217 A BE 476217A BE 476217D A BE476217D A BE 476217DA BE 476217 A BE476217 A BE 476217A
Authority
BE
Belgium
Prior art keywords
head
slide
articulation
presser
slider
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE476217A publication Critical patent/BE476217A/fr

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
    • E21D15/40—Collar 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)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
BE476217D BE476217A (cs)

Publications (1)

Publication Number Publication Date
BE476217A true BE476217A (cs)

Family

ID=124671

Family Applications (1)

Application Number Title Priority Date Filing Date
BE476217D BE476217A (cs)

Country Status (1)

Country Link
BE (1) BE476217A (cs)

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