PL320188A1 - Telescoped prop for hydrauluc longwall-type roof supports - Google Patents

Telescoped prop for hydrauluc longwall-type roof supports

Info

Publication number
PL320188A1
PL320188A1 PL32018897A PL32018897A PL320188A1 PL 320188 A1 PL320188 A1 PL 320188A1 PL 32018897 A PL32018897 A PL 32018897A PL 32018897 A PL32018897 A PL 32018897A PL 320188 A1 PL320188 A1 PL 320188A1
Authority
PL
Poland
Prior art keywords
hydrauluc
longwall
telescoped
prop
type roof
Prior art date
Application number
PL32018897A
Inventor
Friedrich Wilhelm Dannehl
Original Assignee
Dbt Gmbh
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 Dbt Gmbh filed Critical Dbt Gmbh
Publication of PL320188A1 publication Critical patent/PL320188A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
PL32018897A 1996-05-28 1997-05-26 Telescoped prop for hydrauluc longwall-type roof supports PL320188A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996121441 DE19621441C1 (en) 1996-05-28 1996-05-28 Locking-device for screwed ring of ram in mine-walling mechanism

Publications (1)

Publication Number Publication Date
PL320188A1 true PL320188A1 (en) 1997-12-08

Family

ID=7795521

Family Applications (1)

Application Number Title Priority Date Filing Date
PL32018897A PL320188A1 (en) 1996-05-28 1997-05-26 Telescoped prop for hydrauluc longwall-type roof supports

Country Status (3)

Country Link
DE (1) DE19621441C1 (en)
GB (1) GB2313626A (en)
PL (1) PL320188A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045680B4 (en) * 2000-09-15 2006-03-09 Dbt Gmbh Hydraulic cylinder as pit stamp or reverse cylinder unit in underground mining
WO2015154856A2 (en) * 2014-04-07 2015-10-15 Caterpillar Global Mining Europe Gmbh Sleeve holder for a hydraulic cylinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1983020U (en) * 1964-11-14 1968-04-11 Hermann Schwarz K G PRESSURIZED PIT STAMP.
DE2462929C2 (en) * 1974-01-28 1982-07-15 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Annular gap seal of a telescopic ram for mine support purposes

Also Published As

Publication number Publication date
GB9710886D0 (en) 1997-07-23
DE19621441C1 (en) 1997-08-21
GB2313626A (en) 1997-12-03

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