GB877345A - A hydraulic pit-prop - Google Patents

A hydraulic pit-prop

Info

Publication number
GB877345A
GB877345A GB2858058A GB2858058A GB877345A GB 877345 A GB877345 A GB 877345A GB 2858058 A GB2858058 A GB 2858058A GB 2858058 A GB2858058 A GB 2858058A GB 877345 A GB877345 A GB 877345A
Authority
GB
United Kingdom
Prior art keywords
piston
ring
cylinder
guide ring
prop
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
GB2858058A
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.)
BWG Bergwerk und Walzwerk Maschinenbau GmbH
Original Assignee
BWG Bergwerk und Walzwerk Maschinenbau 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 BWG Bergwerk und Walzwerk Maschinenbau GmbH filed Critical BWG Bergwerk und Walzwerk Maschinenbau GmbH
Publication of GB877345A publication Critical patent/GB877345A/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
    • E21D15/515—Particular fluids not covered by any chemical subdivision
    • 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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • 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

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)
  • Details Of Reciprocating Pumps (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
GB2858058A 1957-10-25 1958-09-05 A hydraulic pit-prop Expired GB877345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN14244A DE1224684B (de) 1957-10-25 1957-10-25 Hydraulischer Grubenstempel

Publications (1)

Publication Number Publication Date
GB877345A true GB877345A (en) 1961-09-13

Family

ID=7339843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2858058A Expired GB877345A (en) 1957-10-25 1958-09-05 A hydraulic pit-prop

Country Status (4)

Country Link
BE (1) BE572255A (enrdf_load_stackoverflow)
DE (1) DE1224684B (enrdf_load_stackoverflow)
FR (1) FR1207204A (enrdf_load_stackoverflow)
GB (1) GB877345A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128682A (en) * 1982-10-18 1984-05-02 Giovanni Trevisan Guiding devices for pistons of a two-coaxial piston rotating type actuator
CN113605941A (zh) * 2021-08-04 2021-11-05 陈立伟 单体螺旋支柱

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357859A (en) * 1981-04-08 1982-11-09 United Technologies Corporation Pressure sensor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899483C (de) * 1953-11-05 Eisenwerk Wanheim G.M.B.H., Duisburg-Wanheim Eiserner Grubenstempel
DE1044004B (de) * 1954-05-11 1958-11-20 Maschf Hydraulischer Grubenstempel
DE1009137B (de) * 1955-12-14 1957-05-29 Hermann Schwarz K G Hydraulischer Grubenstempel mit rohrfoermigem Innen- und Aussenteil
BE560360A (enrdf_load_stackoverflow) * 1956-08-29
DE1059383B (de) * 1957-10-15 1959-06-18 Wilhelm Reppel Mehrteiliger hydraulischer Grubenstempel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128682A (en) * 1982-10-18 1984-05-02 Giovanni Trevisan Guiding devices for pistons of a two-coaxial piston rotating type actuator
CN113605941A (zh) * 2021-08-04 2021-11-05 陈立伟 单体螺旋支柱

Also Published As

Publication number Publication date
BE572255A (enrdf_load_stackoverflow) 1958-11-14
FR1207204A (fr) 1960-02-15
DE1224684B (de) 1966-09-15

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