GB900711A - Hydraulic pit prop - Google Patents

Hydraulic pit prop

Info

Publication number
GB900711A
GB900711A GB3008658A GB3008658A GB900711A GB 900711 A GB900711 A GB 900711A GB 3008658 A GB3008658 A GB 3008658A GB 3008658 A GB3008658 A GB 3008658A GB 900711 A GB900711 A GB 900711A
Authority
GB
United Kingdom
Prior art keywords
prop
outlet
sleeve valve
piston
port
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3008658A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARGOT VON LINSINGEN
Original Assignee
MARGOT VON LINSINGEN
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.)
Filing date
Publication date
Application filed by MARGOT VON LINSINGEN filed Critical MARGOT VON LINSINGEN
Publication of GB900711A publication Critical patent/GB900711A/en
Expired legal-status Critical Current

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)
GB3008658A 1957-09-24 1958-09-19 Hydraulic pit prop Expired GB900711A (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
GB900711A true GB900711A (en) 1962-07-11

Family

ID=6967857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3008658A Expired GB900711A (en) 1957-09-24 1958-09-19 Hydraulic pit prop

Country Status (5)

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

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
BE571481A (enrdf_load_stackoverflow)
FR1210381A (fr) 1960-03-08
DE1155076B (de) 1963-10-03
NL231514A (enrdf_load_stackoverflow)

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