NL229755A - - Google Patents

Info

Publication number
NL229755A
NL229755A NL229755DA NL229755A NL 229755 A NL229755 A NL 229755A NL 229755D A NL229755D A NL 229755DA NL 229755 A NL229755 A NL 229755A
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 NL229755A publication Critical patent/NL229755A/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
    • 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
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
NL229755D 1957-07-20 NL229755A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH22502A DE1129439B (de) 1957-07-20 1957-07-20 Nachgiebiger Stuetzkoerper fuer den Grubenausbau

Publications (1)

Publication Number Publication Date
NL229755A true NL229755A (enrdf_load_stackoverflow)

Family

ID=7429341

Family Applications (1)

Application Number Title Priority Date Filing Date
NL229755D NL229755A (enrdf_load_stackoverflow) 1957-07-20

Country Status (2)

Country Link
DE (1) DE1129439B (enrdf_load_stackoverflow)
NL (1) NL229755A (enrdf_load_stackoverflow)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE48870C (de) * F. WOLLANKY und A. KOWASTCH in Beuthen O.-Schl Grumbenstempel
DE800392C (de) * 1949-04-08 1950-11-02 Gewerk Eisenhuette Westfalia Hydraulischer Grubenstempel
FR1006760A (fr) * 1949-10-15 1952-04-28 étançon hydraulique sans pompe individuelle
FR1013518A (fr) * 1949-10-15 1952-07-30 Support pour étançons
BE494572A (enrdf_load_stackoverflow) * 1949-12-08
US2691503A (en) * 1950-03-18 1954-10-12 Goodman Mfg Co Mine prop
GB767626A (en) * 1953-11-02 1957-02-06 Stamicarbon Improvements in and relating to the erection of pit props

Also Published As

Publication number Publication date
DE1129439B (de) 1962-05-17

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