NL231514A - - Google Patents

Info

Publication number
NL231514A
NL231514A NL231514DA NL231514A NL 231514 A NL231514 A NL 231514A NL 231514D A NL231514D A NL 231514DA NL 231514 A NL231514 A NL 231514A
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 NL231514A publication Critical patent/NL231514A/xx

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
    • 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
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
NL231514D 1957-09-24 NL231514A (en))

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB46178A DE1155076B (de) 1957-09-24 1957-09-24 Druckmittelbeaufschlagter, insbesondere hydraulischer Grubenstempel

Publications (1)

Publication Number Publication Date
NL231514A true NL231514A (en))

Family

ID=6967857

Family Applications (1)

Application Number Title Priority Date Filing Date
NL231514D NL231514A (en)) 1957-09-24

Country Status (5)

Country Link
BE (1) BE571481A (en))
DE (1) DE1155076B (en))
FR (1) FR1210381A (en))
GB (1) GB900711A (en))
NL (1) NL231514A (en))

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB686301A (en) * 1941-03-29 1953-01-21 Dresser Equipment Company Improvements in or relating to valve mechanisms and fluid operated motor devices employing said valve mechanisms

Also Published As

Publication number Publication date
DE1155076B (de) 1963-10-03
BE571481A (en))
FR1210381A (fr) 1960-03-08
GB900711A (en) 1962-07-11

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