NL218204A - - Google Patents

Info

Publication number
NL218204A
NL218204A NL218204DA NL218204A NL 218204 A NL218204 A NL 218204A NL 218204D A NL218204D A NL 218204DA NL 218204 A NL218204 A NL 218204A
Authority
NL
Netherlands
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL218204A publication Critical patent/NL218204A/xx

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25Constructional features
    • B66F3/42Constructional features with self-contained pumps, e.g. actuated by hand
    • 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
    • E21D15/44Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E21D15/50Component parts or details of props
    • E21D15/51Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512Arrangement of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Ink Jet (AREA)
  • Control Of Presses (AREA)
NL218204D 1956-06-21 NL218204A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW19284A DE1013245B (de) 1956-06-21 1956-06-21 Hydraulischer Grubenstempel

Publications (1)

Publication Number Publication Date
NL218204A true NL218204A (xx)

Family

ID=7596449

Family Applications (1)

Application Number Title Priority Date Filing Date
NL218204D NL218204A (xx) 1956-06-21

Country Status (5)

Country Link
BE (1) BE558508A (xx)
DE (1) DE1013245B (xx)
FR (1) FR1176775A (xx)
GB (1) GB866239A (xx)
NL (1) NL218204A (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL218917A (xx) * 1956-10-16
DE1193458B (de) * 1958-08-11 1965-05-26 Dobson Ltd W E & F Wandernder Grubenausbau
DE1134947B (de) * 1960-03-23 1962-08-23 Dowty Mining Equipment Ltd Wandernder Grubenausbau zur Abstuetzung des Hangenden
DE1153705B (de) * 1960-10-01 1963-09-05 Rheinstahl Gmbh Wanheim Hydraulischer Grubenstempel
NL277490A (xx) * 1961-04-20
BE635501A (xx) * 1962-07-27 1964-01-27

Also Published As

Publication number Publication date
DE1013245B (de) 1957-08-08
GB866239A (en) 1961-04-26
FR1176775A (fr) 1959-04-15
BE558508A (xx)

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