LU41944A1 - - Google Patents

Info

Publication number
LU41944A1
LU41944A1 LU41944DA LU41944A1 LU 41944 A1 LU41944 A1 LU 41944A1 LU 41944D A LU41944D A LU 41944DA LU 41944 A1 LU41944 A1 LU 41944A1
Authority
LU
Luxembourg
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.)
Filing date
Publication date
Application filed filed Critical
Publication of LU41944A1 publication Critical patent/LU41944A1/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding type
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/0206—Hydraulically operated extension devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/063—Retractable cantilever extensions therefor

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Safety Valves (AREA)
LU41944D 1961-07-22 1962-06-26 LU41944A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR868738A FR1303511A (en) 1961-07-22 1961-07-22 Telescopic extension system with hydraulic lift for supporting elements in size

Publications (1)

Publication Number Publication Date
LU41944A1 true LU41944A1 (en) 1962-08-27

Family

ID=8759869

Family Applications (1)

Application Number Title Priority Date Filing Date
LU41944D LU41944A1 (en) 1961-07-22 1962-06-26

Country Status (6)

Country Link
US (1) US3240021A (en)
BE (1) BE618721A (en)
FR (1) FR1303511A (en)
GB (1) GB981568A (en)
LU (1) LU41944A1 (en)
OA (1) OA00401A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290506B (en) * 1962-11-10 1969-03-13 Groetschel Karl Maria Traveling extension unit
LU44403A1 (en) * 1963-09-09 1963-11-09
GB1045353A (en) * 1964-02-12 1966-10-12 Gullick Ltd Improvements in or relating to mine roof supports
HU167711B (en) * 1973-12-07 1975-12-25
GB1583647A (en) * 1976-09-24 1981-01-28 Huwood Ltd Mine roof supports
US4480946A (en) * 1981-10-19 1984-11-06 Kelley Jay H Gob canopy for a mine roof support
DE3221486A1 (en) * 1982-06-07 1983-12-08 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Forepoling device for hydraulic self-advancing powered support assemblies
GB2123885B (en) * 1982-07-09 1986-02-19 Dowty Mining Equipment Ltd Roof support for use in mines
US4483644A (en) * 1982-09-15 1984-11-20 Johnson Thomas P Cantilevered mobile marine rig with hydraulic load equalizer
US4565263A (en) * 1985-06-10 1986-01-21 Southworth Ted J Sawhorse with extendible and contractible leg assemblies
GB2196371B (en) * 1986-10-15 1990-05-09 Gullick Dobson Ltd Mine roof supports
CN102305090A (en) * 2011-09-29 2012-01-04 郑州四维机电设备制造有限公司 Telescopic girder mechanism

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182188B (en) * 1956-06-05 1964-11-26 Hoesch Ag Vorpfaendeinrichtung
FR1192849A (en) * 1957-04-20 1959-10-28 Hoesch Werke Ag Support extension
GB881364A (en) * 1959-01-16 1961-11-01 Gullick Ltd Improvements in or relating to hydraulic ram devices, particularly applicable to mine roof supports
DE1077618B (en) * 1959-04-16 1960-03-17 Hermann Schwarz Kommanditgesel Flexible stretch support
US3127748A (en) * 1960-05-10 1964-04-07 Gullick Ltd Mine roof supports

Also Published As

Publication number Publication date
BE618721A (en) 1962-10-01
OA00401A (en) 1966-05-15
US3240021A (en) 1966-03-15
FR1303511A (en) 1962-09-14
GB981568A (en) 1965-01-27

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