GB420266A - Improvements in or relating to percussive tools - Google Patents

Improvements in or relating to percussive tools

Info

Publication number
GB420266A
GB420266A GB700034A GB700034A GB420266A GB 420266 A GB420266 A GB 420266A GB 700034 A GB700034 A GB 700034A GB 700034 A GB700034 A GB 700034A GB 420266 A GB420266 A GB 420266A
Authority
GB
United Kingdom
Prior art keywords
rotates
engaged
camborne
pawls
collar
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
GB700034A
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.)
Holman Brothers Ltd
Original Assignee
Holman Brothers 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 Holman Brothers Ltd filed Critical Holman Brothers Ltd
Priority to GB700034A priority Critical patent/GB420266A/en
Publication of GB420266A publication Critical patent/GB420266A/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)
  • Transmission Devices (AREA)

Abstract

420,266. Percussive drills. COCK, B., Woodbine, Camborne, and HOLMAN BROS., Ltd., Camborne, Cornwall. March 5, 1934, No. 7000. [Class 124] A reaction feed mechanism has a female feed screw 13 formed in the cradle 12 which is engaged by a "nut" 14. This nut rotates with and slides on a sleeve 16 on which are formed two ratchet wheels 22, 23 of opposite hand and engaged by pawls 24 carried by the casing. These pawls are selectively engaged for feed or withdrawal by movement of the handle 21 which rotates the spindle 19 and so rotates the arms 29 of the collar 28. Further movement of the handle 21 in either direction causes cam surfaces on the collar 28 to jam the flared surface 18 of the sleeve against the casing.
GB700034A 1934-03-05 1934-03-05 Improvements in or relating to percussive tools Expired GB420266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB700034A GB420266A (en) 1934-03-05 1934-03-05 Improvements in or relating to percussive tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB700034A GB420266A (en) 1934-03-05 1934-03-05 Improvements in or relating to percussive tools

Publications (1)

Publication Number Publication Date
GB420266A true GB420266A (en) 1934-11-28

Family

ID=9824710

Family Applications (1)

Application Number Title Priority Date Filing Date
GB700034A Expired GB420266A (en) 1934-03-05 1934-03-05 Improvements in or relating to percussive tools

Country Status (1)

Country Link
GB (1) GB420266A (en)

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