BE493811A - - Google Patents

Info

Publication number
BE493811A
BE493811A BE493811DA BE493811A BE 493811 A BE493811 A BE 493811A BE 493811D A BE493811D A BE 493811DA BE 493811 A BE493811 A BE 493811A
Authority
BE
Belgium
Prior art keywords
piston
key
valve
pump body
action
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE493811A publication Critical patent/BE493811A/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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
  • Reciprocating Pumps (AREA)
BE493811D BE493811A (en(2012))

Publications (1)

Publication Number Publication Date
BE493811A true BE493811A (en(2012))

Family

ID=137722

Family Applications (1)

Application Number Title Priority Date Filing Date
BE493811D BE493811A (en(2012))

Country Status (1)

Country Link
BE (1) BE493811A (en(2012))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872147A (en) * 1952-09-05 1959-02-03 Mining Engineering Co Ltd Roof supports
US2888230A (en) * 1952-06-16 1959-05-26 Mining Engineering Co Ltd Roof supports
US2888231A (en) * 1952-05-27 1959-05-26 Mining Engineering Co Ltd Roof supports
DE1123639B (de) * 1953-06-02 1962-02-15 Bolton & Company Engineers Ltd Wandernder Strebausbau
DE1123640B (de) * 1957-12-23 1962-02-15 Kloeckner Werke Ag Doppelt ausfahrbarer hydraulischer Grubenstempel
DE1133327B (de) * 1956-10-29 1962-07-19 Wilhelm Reppel Mehrfach ausziehbarer hydraulischer Grubenstempel
DE1149678B (de) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Mehrstufiger hydraulischer Grubenstempel
DE1153705B (de) * 1960-10-01 1963-09-05 Rheinstahl Gmbh Wanheim Hydraulischer Grubenstempel
DE1156735B (de) * 1960-05-03 1963-11-07 Kloeckner Werke Ag Hydraulischer Grubenstempel
DE1167299B (de) * 1960-09-02 1964-04-09 Houilleres Bassin Du Nord Hydraulischer Stempel

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888231A (en) * 1952-05-27 1959-05-26 Mining Engineering Co Ltd Roof supports
US2888230A (en) * 1952-06-16 1959-05-26 Mining Engineering Co Ltd Roof supports
US2872147A (en) * 1952-09-05 1959-02-03 Mining Engineering Co Ltd Roof supports
DE1123639B (de) * 1953-06-02 1962-02-15 Bolton & Company Engineers Ltd Wandernder Strebausbau
DE1133327B (de) * 1956-10-29 1962-07-19 Wilhelm Reppel Mehrfach ausziehbarer hydraulischer Grubenstempel
DE1123640B (de) * 1957-12-23 1962-02-15 Kloeckner Werke Ag Doppelt ausfahrbarer hydraulischer Grubenstempel
DE1156735B (de) * 1960-05-03 1963-11-07 Kloeckner Werke Ag Hydraulischer Grubenstempel
DE1167299B (de) * 1960-09-02 1964-04-09 Houilleres Bassin Du Nord Hydraulischer Stempel
DE1149678B (de) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Mehrstufiger hydraulischer Grubenstempel
DE1153705B (de) * 1960-10-01 1963-09-05 Rheinstahl Gmbh Wanheim Hydraulischer Grubenstempel

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