BE412910A - - Google Patents

Info

Publication number
BE412910A
BE412910A BE412910DA BE412910A BE 412910 A BE412910 A BE 412910A BE 412910D A BE412910D A BE 412910DA BE 412910 A BE412910 A BE 412910A
Authority
BE
Belgium
Prior art keywords
prop
tube
sliding
sleeve
ring
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE412910A publication Critical patent/BE412910A/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
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
    • E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring

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)
  • Orthopedics, Nursing, And Contraception (AREA)
BE412910D BE412910A (OSRAM)

Publications (1)

Publication Number Publication Date
BE412910A true BE412910A (OSRAM)

Family

ID=76560

Family Applications (1)

Application Number Title Priority Date Filing Date
BE412910D BE412910A (OSRAM)

Country Status (1)

Country Link
BE (1) BE412910A (OSRAM)

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