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AU497008B2 - Hydrautic apparatus - Google Patents

Hydrautic apparatus

Info

Publication number
AU497008B2
AU497008B2 AU55527/73A AU5552773A AU497008B2 AU 497008 B2 AU497008 B2 AU 497008B2 AU 55527/73 A AU55527/73 A AU 55527/73A AU 5552773 A AU5552773 A AU 5552773A AU 497008 B2 AU497008 B2 AU 497008B2
Authority
AU
Australia
Prior art keywords
hydrautic
hydrautic apparatus
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
AU55527/73A
Other versions
AU5552773A (en
Inventor
Ra Gibbins
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to AU55527/73A priority Critical patent/AU497008B2/en
Publication of AU5552773A publication Critical patent/AU5552773A/en
Application granted granted Critical
Publication of AU497008B2 publication Critical patent/AU497008B2/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
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
    • E21D23/20—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms for sequential movement, e.g. one behind the other
    • 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)
AU55527/73A 1973-05-10 1973-05-10 Hydrautic apparatus Expired AU497008B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU55527/73A AU497008B2 (en) 1973-05-10 1973-05-10 Hydrautic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU55527/73A AU497008B2 (en) 1973-05-10 1973-05-10 Hydrautic apparatus

Publications (2)

Publication Number Publication Date
AU5552773A AU5552773A (en) 1974-11-14
AU497008B2 true AU497008B2 (en) 1978-11-23

Family

ID=3741254

Family Applications (1)

Application Number Title Priority Date Filing Date
AU55527/73A Expired AU497008B2 (en) 1973-05-10 1973-05-10 Hydrautic apparatus

Country Status (1)

Country Link
AU (1) AU497008B2 (en)

Also Published As

Publication number Publication date
AU5552773A (en) 1974-11-14

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