GB991903A - Improvements in or relating to hydraulic devices for the automatically sequence-controlled setting and tightening of composite pit props - Google Patents

Improvements in or relating to hydraulic devices for the automatically sequence-controlled setting and tightening of composite pit props

Info

Publication number
GB991903A
GB991903A GB3311461A GB3311461A GB991903A GB 991903 A GB991903 A GB 991903A GB 3311461 A GB3311461 A GB 3311461A GB 3311461 A GB3311461 A GB 3311461A GB 991903 A GB991903 A GB 991903A
Authority
GB
United Kingdom
Prior art keywords
tightening
valve
reversing valve
setting
relating
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
GB3311461A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB991903A publication Critical patent/GB991903A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/588—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded the lock also being activated

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)
  • Earth Drilling (AREA)
GB3311461A 1960-09-17 1961-09-15 Improvements in or relating to hydraulic devices for the automatically sequence-controlled setting and tightening of composite pit props Expired GB991903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG30515A DE1144671B (de) 1960-09-17 1960-09-17 Hydraulische Hubvorrichtung zum Setzen und Spannen mehrteiliger Grubenstempel

Publications (1)

Publication Number Publication Date
GB991903A true GB991903A (en) 1965-05-12

Family

ID=7124031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3311461A Expired GB991903A (en) 1960-09-17 1961-09-15 Improvements in or relating to hydraulic devices for the automatically sequence-controlled setting and tightening of composite pit props

Country Status (3)

Country Link
BE (1) BE608192R (de)
DE (1) DE1144671B (de)
GB (1) GB991903A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017051A (zh) * 2021-10-11 2022-02-08 煤炭科学研究总院 支架安装车

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017051A (zh) * 2021-10-11 2022-02-08 煤炭科学研究总院 支架安装车
CN114017051B (zh) * 2021-10-11 2023-10-20 煤炭科学研究总院有限公司 支架安装车

Also Published As

Publication number Publication date
BE608192R (fr) 1962-01-02
DE1144671B (de) 1963-03-07

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