CA919925A - Control systems for self-advancing mine roof supports - Google Patents

Control systems for self-advancing mine roof supports

Info

Publication number
CA919925A
CA919925A CA083718A CA83718A CA919925A CA 919925 A CA919925 A CA 919925A CA 083718 A CA083718 A CA 083718A CA 83718 A CA83718 A CA 83718A CA 919925 A CA919925 A CA 919925A
Authority
CA
Canada
Prior art keywords
self
control systems
mine roof
roof supports
advancing mine
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
CA083718A
Other versions
CA83718S (en
Inventor
Cooke John
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Application granted granted Critical
Publication of CA919925A publication Critical patent/CA919925A/en
Expired 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
    • E21D23/26—Hydraulic or pneumatic control

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)
  • Mechanically-Actuated Valves (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Multiple-Way Valves (AREA)
CA083718A 1969-05-28 1970-05-26 Control systems for self-advancing mine roof supports Expired CA919925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2687269 1969-05-28

Publications (1)

Publication Number Publication Date
CA919925A true CA919925A (en) 1973-01-30

Family

ID=10250546

Family Applications (1)

Application Number Title Priority Date Filing Date
CA083718A Expired CA919925A (en) 1969-05-28 1970-05-26 Control systems for self-advancing mine roof supports

Country Status (7)

Country Link
US (1) US3661056A (en)
JP (1) JPS5126362B1 (en)
CA (1) CA919925A (en)
FR (1) FR2048819A5 (en)
GB (1) GB1295079A (en)
PL (1) PL72769B1 (en)
ZA (1) ZA703511B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128878A (en) * 1935-03-22 1938-08-30 Trico Products Corp Windshield cleaner control mechanism
US2202422A (en) * 1937-08-02 1940-05-28 Addison C Hoof Remote control for governors
DE1201286B (en) * 1965-01-21 1965-09-23 Gewerk Eisenhuette Westfalia Retractable hydraulic longwall construction
US3289625A (en) * 1965-04-21 1966-12-06 Stanley King N Boat hull drain assembly
JPS441196Y1 (en) * 1965-06-01 1969-01-17
US3405567A (en) * 1967-03-01 1968-10-15 Morse Controls Inc Selective vernier control

Also Published As

Publication number Publication date
DE2025293A1 (en) 1972-03-09
FR2048819A5 (en) 1971-03-19
US3661056A (en) 1972-05-09
PL72769B1 (en) 1974-08-30
ZA703511B (en) 1971-01-27
JPS5126362B1 (en) 1976-08-06
GB1295079A (en) 1972-11-01

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