AU512730B2 - Telescopic leg - Google Patents

Telescopic leg

Info

Publication number
AU512730B2
AU512730B2 AU26960/77A AU2696077A AU512730B2 AU 512730 B2 AU512730 B2 AU 512730B2 AU 26960/77 A AU26960/77 A AU 26960/77A AU 2696077 A AU2696077 A AU 2696077A AU 512730 B2 AU512730 B2 AU 512730B2
Authority
AU
Australia
Prior art keywords
telescopic leg
telescopic
leg
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
AU26960/77A
Other versions
AU2696077A (en
Inventor
F Garatti.
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.)
Australian Iron and Steel Pty Ltd
Original Assignee
Australian Iron and Steel Pty 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 Australian Iron and Steel Pty Ltd filed Critical Australian Iron and Steel Pty Ltd
Priority to AU26960/77A priority Critical patent/AU512730B2/en
Publication of AU2696077A publication Critical patent/AU2696077A/en
Application granted granted Critical
Publication of AU512730B2 publication Critical patent/AU512730B2/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Structural Engineering (AREA)
AU26960/77A 1977-07-12 1977-07-12 Telescopic leg Expired AU512730B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26960/77A AU512730B2 (en) 1977-07-12 1977-07-12 Telescopic leg

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU26960/77A AU512730B2 (en) 1977-07-12 1977-07-12 Telescopic leg

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU67,056/74 Division 1977-07-12

Publications (2)

Publication Number Publication Date
AU2696077A AU2696077A (en) 1977-10-06
AU512730B2 true AU512730B2 (en) 1980-10-23

Family

ID=3715381

Family Applications (1)

Application Number Title Priority Date Filing Date
AU26960/77A Expired AU512730B2 (en) 1977-07-12 1977-07-12 Telescopic leg

Country Status (1)

Country Link
AU (1) AU512730B2 (en)

Also Published As

Publication number Publication date
AU2696077A (en) 1977-10-06

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