BE526791A - - Google Patents

Info

Publication number
BE526791A
BE526791A BE526791DA BE526791A BE 526791 A BE526791 A BE 526791A BE 526791D A BE526791D A BE 526791DA BE 526791 A BE526791 A BE 526791A
Authority
BE
Belgium
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 BE526791A publication Critical patent/BE526791A/xx

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
BE526791D 1953-02-25 BE526791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5311/53A GB741150A (en) 1953-02-25 1953-02-25 Improvements in mine roof supports

Publications (1)

Publication Number Publication Date
BE526791A true BE526791A (en)

Family

ID=9793715

Family Applications (1)

Application Number Title Priority Date Filing Date
BE526791D BE526791A (en) 1953-02-25

Country Status (6)

Country Link
US (1) US2857125A (en)
BE (1) BE526791A (en)
DE (1) DE946528C (en)
FR (1) FR1096391A (en)
GB (1) GB741150A (en)
NL (1) NL185384B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173053B (en) * 1959-03-03 1964-07-02 Dobson Ltd W E & F Hydraulic pit ram

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094209B (en) * 1954-09-10 1960-12-08 Rheinstahl Gmbh Wanheim Pit stamp
DE1023436B (en) * 1955-11-24 1958-01-30 Hermann Schwarz Kommanditgesel Hydraulic pit ram
BE553228A (en) * 1955-12-08
DE1062654B (en) * 1956-04-03 1959-08-06 Kloeckner Bergbau Viktor Icker Hydraulic pit ram
DE1081397B (en) * 1956-06-25 1960-05-12 Becorit Grubenausbau Gmbh Hydraulic pit ram
GB845918A (en) * 1957-02-06 1960-08-24 Dowty Mining Equipment Ltd Improvements in fluid pressure relief valves
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
FR1280684A (en) * 1960-11-22 1962-01-08 Sagem hydraulic prop
US3830456A (en) * 1972-12-22 1974-08-20 Fletcher J & Co Mining apparatus
FR2505925A1 (en) * 1981-05-12 1982-11-19 Alsace Mines Potasse MECHANICAL DEVICE FOR CONNECTING HEAD BETWEEN HEAD OR PEDESTAL HEAD AND PACKAGE OR HAT FOR HOLDING BATTERIES
CN102562100A (en) * 2010-12-13 2012-07-11 襄樊禹仁机电液压科技有限公司 Automatic exhausting single hydraulic prop

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289904C (en) *
GB636568A (en) * 1953-07-20 1950-05-03 George Herbert Dowty Improvements in pit props and other telescopic struts
FR1009955A (en) * 1948-07-15 1952-06-05 Mine gallery support
GB658998A (en) * 1948-09-01 1951-10-17 Dowty Equipment Ltd Improvements in mine roof supports

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173053B (en) * 1959-03-03 1964-07-02 Dobson Ltd W E & F Hydraulic pit ram

Also Published As

Publication number Publication date
US2857125A (en) 1958-10-21
DE946528C (en) 1956-08-02
NL185384B (en) 1958-04-15
FR1096391A (en) 1955-06-20
GB741150A (en) 1955-11-30

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