[go: up one dir, main page]

GB927765A - Improvements in or relating to telescopic hydraulic pit props - Google Patents

Improvements in or relating to telescopic hydraulic pit props

Info

Publication number
GB927765A
GB927765A GB3143561A GB3143561A GB927765A GB 927765 A GB927765 A GB 927765A GB 3143561 A GB3143561 A GB 3143561A GB 3143561 A GB3143561 A GB 3143561A GB 927765 A GB927765 A GB 927765A
Authority
GB
United Kingdom
Prior art keywords
tube
ram
base
chamber
valve
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
GB3143561A
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.)
Houilleres du Bassin du Nord et du Pas de Calais
Original Assignee
Houilleres du Bassin du Nord et du Pas de Calais
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 Houilleres du Bassin du Nord et du Pas de Calais filed Critical Houilleres du Bassin du Nord et du Pas de Calais
Publication of GB927765A publication Critical patent/GB927765A/en
Expired legal-status Critical Current

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
    • E21D15/50—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
    • E21D15/512—Arrangement of valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Medicinal Preparation (AREA)
GB3143561A 1960-09-02 1961-08-31 Improvements in or relating to telescopic hydraulic pit props Expired GB927765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR837619A FR1273471A (fr) 1960-09-02 1960-09-02 Perfectionnement apporté aux étançons hydrauliques télescopiques

Publications (1)

Publication Number Publication Date
GB927765A true GB927765A (en) 1963-06-06

Family

ID=8738365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3143561A Expired GB927765A (en) 1960-09-02 1961-08-31 Improvements in or relating to telescopic hydraulic pit props

Country Status (4)

Country Link
BE (1) BE607500A (da)
DE (1) DE1167299B (da)
FR (1) FR1273471A (da)
GB (1) GB927765A (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252476A (en) * 1978-09-12 1981-02-24 Bochumer Eisenhutte Heintzmann Gmbh & Co. Hydraulically operated mine prop with safety valve
FR2518640A1 (fr) * 1981-12-21 1983-06-24 Gewerk Eisenhuette Westfalia Etancon telescopique hydraulique, en particulier pour soutenement marchant souterrain, et surtout pour pile-bouclier de soutenement
GB2176846A (en) * 1985-06-19 1987-01-07 Kloeckner Becorit Gmbh Three part telescopic prop
CN111878128A (zh) * 2020-08-06 2020-11-03 山东中煤工矿物资集团有限公司 一种新型液压支柱

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226972B (de) * 1964-10-20 1966-10-20 Gewerk Eisenhuette Westfalia Hydraulischer Doppel-Teleskopstempel
AT339237B (de) * 1975-09-09 1977-10-10 Voest Ag Hydraulischer grubenstempel
DE4323462C2 (de) * 1993-07-14 1995-05-04 Vos Richard Grubenausbau Gmbh Ausbaustempel für den Untertageeinsatz mit integriertem Druckbegrenzungsventil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493811A (da) *
US1685697A (en) * 1926-07-30 1928-09-25 Nathan M Guinsburg Jack
DE1063101B (de) * 1956-02-20 1959-08-13 Gutehoffnungshuette Sterkrade Hydraulischer Grubenstempel
DE1076603B (de) * 1957-01-07 1960-03-03 Deutschland Ag Maschf Hydraulisch-pneumatischer Grubenstempel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252476A (en) * 1978-09-12 1981-02-24 Bochumer Eisenhutte Heintzmann Gmbh & Co. Hydraulically operated mine prop with safety valve
FR2518640A1 (fr) * 1981-12-21 1983-06-24 Gewerk Eisenhuette Westfalia Etancon telescopique hydraulique, en particulier pour soutenement marchant souterrain, et surtout pour pile-bouclier de soutenement
GB2176846A (en) * 1985-06-19 1987-01-07 Kloeckner Becorit Gmbh Three part telescopic prop
CN111878128A (zh) * 2020-08-06 2020-11-03 山东中煤工矿物资集团有限公司 一种新型液压支柱

Also Published As

Publication number Publication date
DE1167299B (de) 1964-04-09
FR1273471A (fr) 1961-10-13
BE607500A (da)

Similar Documents

Publication Publication Date Title
GB1126940A (en) A multi-stage telescopic hydraulic pit prop
GB581420A (en) A suspension unit, particularly for a motor-vehicle
GB1232598A (da)
ES319601A1 (es) Perfeccionamientos en las valvulas de purga rapida para gatos hidraulicos, especialmente para gatos hidraulicos de accionamiento de disyuntor.
GB927765A (en) Improvements in or relating to telescopic hydraulic pit props
GB1005171A (en) Improvements in vehicle suspension systems
GB998742A (en) Improvements in or relating to telescopic shock absorbers
US2990687A (en) Hydro-pneumatic press
GB925777A (en) Hydraulic jack
US2732851A (en) ashley etal
GB794064A (en) Improvements in or relating to hydraulic pit props
US2662543A (en) Pressure reducing valve
GB892976A (en) Improvements relating to hydraulic pit-props or the like
GB1044265A (en) Automatic overload fluid control valve
GB1045302A (en) Hydraulically operated roof supports
GB1491427A (en) Jack-pump device
GB899122A (en) Improvements in or relating to fluid pressure control valves
ES450483A1 (es) Perfeccionamientos en valvulas de correccion hidraulica.
GB767551A (en) Improvements in or relating to hydraulic shock absorbers
GB635737A (en) Improvements in and relating to fluid metering valves
GB954660A (en) Hydraulic pit prop
GB890644A (en) Improvements in or relating to hydraulic jacks, pit props or the like
GB1114927A (en) Fluid-pressure-operated telescopic prop assembly
GB1026136A (en) Hydraulic pit prop with extended lift
GB822161A (en) Improvements in or relating to hydraulic pit props and liquid supply systems therefor