GB1054630A - - Google Patents

Info

Publication number
GB1054630A
GB1054630A GB1054630DA GB1054630A GB 1054630 A GB1054630 A GB 1054630A GB 1054630D A GB1054630D A GB 1054630DA GB 1054630 A GB1054630 A GB 1054630A
Authority
GB
United Kingdom
Prior art keywords
prop
line
jack
valve
fluid
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.)
Active
Application number
Other languages
English (en)
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 GB1054630A publication Critical patent/GB1054630A/en
Active legal-status Critical Current

Links

Classifications

    • 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
GB1054630D 1962-10-09 Active GB1054630A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3821362 1962-10-09

Publications (1)

Publication Number Publication Date
GB1054630A true GB1054630A (xx)

Family

ID=10401997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1054630D Active GB1054630A (xx) 1962-10-09

Country Status (3)

Country Link
US (1) US3244078A (xx)
DE (1) DE1220368B (xx)
GB (1) GB1054630A (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321094A (en) * 1965-06-11 1967-05-23 Int Harvester Co Control for materials handling apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069548B (xx) * 1959-11-26
US1231628A (en) * 1915-05-03 1917-07-03 Westinghouse Electric & Mfg Co Potential-regulator.
US2348460A (en) * 1941-08-19 1944-05-09 Crane Co Combined hand and hydraulic valve operator
US2607197A (en) * 1949-08-06 1952-08-19 Keller Tool Co Sequential motor operation under control of individual, fluid actuated, relieved pressure valves
US3120105A (en) * 1959-09-25 1964-02-04 Coal Industry Patents Ltd Self-advancing mine roof supports
US3043277A (en) * 1960-07-20 1962-07-10 Carlson Martin Hydraulic door operator system and control means therefor

Also Published As

Publication number Publication date
DE1220368B (de) 1966-07-07
US3244078A (en) 1966-04-05

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