GB656800A - Improvements in or relating to mine props - Google Patents

Improvements in or relating to mine props

Info

Publication number
GB656800A
GB656800A GB2237248A GB2237248A GB656800A GB 656800 A GB656800 A GB 656800A GB 2237248 A GB2237248 A GB 2237248A GB 2237248 A GB2237248 A GB 2237248A GB 656800 A GB656800 A GB 656800A
Authority
GB
United Kingdom
Prior art keywords
prop
motor
pump
hydraulic
lever
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
GB2237248A
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.)
Mavor and Coulson Ltd
Original Assignee
Mavor and Coulson Ltd
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 Mavor and Coulson Ltd filed Critical Mavor and Coulson Ltd
Priority to GB2237248A priority Critical patent/GB656800A/en
Priority to NL152144A priority patent/NL69904C/xx
Priority to DEM2295A priority patent/DE809903C/de
Priority to FR1014707D priority patent/FR1014707A/fr
Priority to BE494657D priority patent/BE494657A/xx
Publication of GB656800A publication Critical patent/GB656800A/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
    • E21D15/14—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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G50/00—Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation
    • C10G50/02—Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation of hydrocarbon oils for lubricating purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
GB2237248A 1948-08-25 1948-08-25 Improvements in or relating to mine props Expired GB656800A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB2237248A GB656800A (en) 1948-08-25 1948-08-25 Improvements in or relating to mine props
NL152144A NL69904C (de) 1948-08-25 1950-03-09
DEM2295A DE809903C (de) 1948-08-25 1950-03-12 Hydraulischer Stempel fuer den Grubenbetrieb
FR1014707D FR1014707A (fr) 1948-08-25 1950-03-15 Perfectionnements aux étais extensibles pour mine
BE494657D BE494657A (de) 1948-08-25 1950-03-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2237248A GB656800A (en) 1948-08-25 1948-08-25 Improvements in or relating to mine props

Publications (1)

Publication Number Publication Date
GB656800A true GB656800A (en) 1951-09-05

Family

ID=10178300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2237248A Expired GB656800A (en) 1948-08-25 1948-08-25 Improvements in or relating to mine props

Country Status (4)

Country Link
BE (1) BE494657A (de)
FR (1) FR1014707A (de)
GB (1) GB656800A (de)
NL (1) NL69904C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195704B (de) * 1963-10-03 1965-07-01 Salzgitter Maschinen Ag Hydraulischer Grubenstempel
CN113685208A (zh) * 2021-07-14 2021-11-23 东北大学 一种流固耦合式多级吸能防冲液压立柱及其工作方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195704B (de) * 1963-10-03 1965-07-01 Salzgitter Maschinen Ag Hydraulischer Grubenstempel
CN113685208A (zh) * 2021-07-14 2021-11-23 东北大学 一种流固耦合式多级吸能防冲液压立柱及其工作方法

Also Published As

Publication number Publication date
BE494657A (de) 1950-07-17
FR1014707A (fr) 1952-08-20
NL69904C (de) 1952-04-13

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