ZA862195B - Roof bolting legs - Google Patents

Roof bolting legs

Info

Publication number
ZA862195B
ZA862195B ZA862195A ZA862195A ZA862195B ZA 862195 B ZA862195 B ZA 862195B ZA 862195 A ZA862195 A ZA 862195A ZA 862195 A ZA862195 A ZA 862195A ZA 862195 B ZA862195 B ZA 862195B
Authority
ZA
South Africa
Prior art keywords
legs
roof bolting
bolting
roof
bolting legs
Prior art date
Application number
ZA862195A
Inventor
Raymond Thomas Bloomfield
Original Assignee
Raymond Thomas Bloomfield
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 Raymond Thomas Bloomfield filed Critical Raymond Thomas Bloomfield
Publication of ZA862195B publication Critical patent/ZA862195B/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
ZA862195A 1985-03-22 1986-03-24 Roof bolting legs ZA862195B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPG986985 1985-03-22

Publications (1)

Publication Number Publication Date
ZA862195B true ZA862195B (en) 1986-11-26

Family

ID=3770996

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA862195A ZA862195B (en) 1985-03-22 1986-03-24 Roof bolting legs

Country Status (2)

Country Link
GB (1) GB2172528A (en)
ZA (1) ZA862195B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3514428B2 (en) * 1999-08-24 2004-03-31 日本ベルボン精機工業株式会社 Tripod

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3455212A (en) * 1967-06-16 1969-07-15 Chicago Pneumatic Tool Co Lightweight,plastic,pneumatic feed leg
SE424667B (en) * 1975-09-04 1982-08-02 Oiles Industry Co Ltd PLASTIC AIR CYLINDER DEVICE

Also Published As

Publication number Publication date
GB8607220D0 (en) 1986-04-30
GB2172528A (en) 1986-09-24

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