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GB479853A - Improvements in or relating to portable drilling machines - Google Patents

Improvements in or relating to portable drilling machines

Info

Publication number
GB479853A
GB479853A GB2213036A GB2213036A GB479853A GB 479853 A GB479853 A GB 479853A GB 2213036 A GB2213036 A GB 2213036A GB 2213036 A GB2213036 A GB 2213036A GB 479853 A GB479853 A GB 479853A
Authority
GB
United Kingdom
Prior art keywords
relating
drilling machines
crofton
portable drilling
rock
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
GB2213036A
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.)
CHARLES CROFTON AND Co EN
Original Assignee
CHARLES CROFTON AND Co 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.)
Filing date
Publication date
Application filed by CHARLES CROFTON AND Co EN filed Critical CHARLES CROFTON AND Co EN
Priority to GB2213036A priority Critical patent/GB479853A/en
Publication of GB479853A publication Critical patent/GB479853A/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
    • E21B19/081—Screw-and-nut feed mechanisms

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)
  • Earth Drilling (AREA)

Abstract

479,853. Supports for rock-drills. CROFTON & CO. (ENGINEERS), Ltd., C., and CROFTON, H. B. Aug. 11. 1936, No. 22130. [Class 124] The rotary rock-drill 1 is supported from its feed screw 2, one end of which is clamped to a post 6 and the other is formed with a portion 9 to engage the face to be drilled. The portion 9 is attached by a screw connection to the end of the feed screw so that the length of the combination may be adjusted, and is then locked by the lock nut 10. In a modification, the screw connection is replaced by a telescopic tube having a venier arrangement of holes through which a securing pin passes.
GB2213036A 1936-08-11 1936-08-11 Improvements in or relating to portable drilling machines Expired GB479853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2213036A GB479853A (en) 1936-08-11 1936-08-11 Improvements in or relating to portable drilling machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2213036A GB479853A (en) 1936-08-11 1936-08-11 Improvements in or relating to portable drilling machines

Publications (1)

Publication Number Publication Date
GB479853A true GB479853A (en) 1938-02-11

Family

ID=10174375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2213036A Expired GB479853A (en) 1936-08-11 1936-08-11 Improvements in or relating to portable drilling machines

Country Status (1)

Country Link
GB (1) GB479853A (en)

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