BE493038A - - Google Patents

Info

Publication number
BE493038A
BE493038A BE493038DA BE493038A BE 493038 A BE493038 A BE 493038A BE 493038D A BE493038D A BE 493038DA BE 493038 A BE493038 A BE 493038A
Authority
BE
Belgium
Prior art keywords
lock
compression
wedge
inner barrel
working
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE493038A publication Critical patent/BE493038A/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)
  • Clamps And Clips (AREA)
BE493038D BE493038A (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
BE493038A true BE493038A (cg-RX-API-DMAC7.html)

Family

ID=137130

Family Applications (1)

Application Number Title Priority Date Filing Date
BE493038D BE493038A (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
BE (1) BE493038A (cg-RX-API-DMAC7.html)

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