BE478762A - - Google Patents

Info

Publication number
BE478762A
BE478762A BE478762DA BE478762A BE 478762 A BE478762 A BE 478762A BE 478762D A BE478762D A BE 478762DA BE 478762 A BE478762 A BE 478762A
Authority
BE
Belgium
Prior art keywords
wedge
strut
friction
metal
lock bracket
Prior art date
Application number
Other languages
English (en)
Dutch (nl)
Publication of BE478762A publication Critical patent/BE478762A/nl

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
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction

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)
  • Mutual Connection Of Rods And Tubes (AREA)
BE478762D BE478762A (https=)

Publications (1)

Publication Number Publication Date
BE478762A true BE478762A (https=)

Family

ID=126442

Family Applications (1)

Application Number Title Priority Date Filing Date
BE478762D BE478762A (https=)

Country Status (1)

Country Link
BE (1) BE478762A (https=)

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