BE553771A - - Google Patents

Info

Publication number
BE553771A
BE553771A BE553771DA BE553771A BE 553771 A BE553771 A BE 553771A BE 553771D A BE553771D A BE 553771DA BE 553771 A BE553771 A BE 553771A
Authority
BE
Belgium
Prior art keywords
prop
cylinder
pressurized fluid
oil
piston
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE553771A publication Critical patent/BE553771A/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
    • E21D15/58Devices for setting props or chocks
    • E21D15/585Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • 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
    • E21D15/32Telescopic 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
    • E21D15/325Telescopic 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)
  • Actuator (AREA)
BE553771D BE553771A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE553771A true BE553771A (enrdf_load_html_response)

Family

ID=178447

Family Applications (1)

Application Number Title Priority Date Filing Date
BE553771D BE553771A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE553771A (enrdf_load_html_response)

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