GB171792A - Improvements in or relating to stone drills or augers - Google Patents

Improvements in or relating to stone drills or augers

Info

Publication number
GB171792A
GB171792A GB2463420A GB2463420A GB171792A GB 171792 A GB171792 A GB 171792A GB 2463420 A GB2463420 A GB 2463420A GB 2463420 A GB2463420 A GB 2463420A GB 171792 A GB171792 A GB 171792A
Authority
GB
United Kingdom
Prior art keywords
tooth
edge
augers
relating
drills
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
GB2463420A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2463420A priority Critical patent/GB171792A/en
Publication of GB171792A publication Critical patent/GB171792A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/44Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts

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

171,792. Stapf, A., and Hundrieser, H. Aug. 25, 1920. Drills for stone have a central offset cutting- edge 2, Fig. 1, and circumferential cutting-teeth 4, 5, the tooth 4 preferably being less in width and greater in projection than the tooth 5. The edge 2 is connected with the root of the tooth 4 by a sloping edge 3. In a modification, the inner edge of the tooth 4 is also in. clined. In a further modification, the circumferential cutting members comprise arcuate blades 22, 23, Fig. 6, secured on the shouldered down end of the shank by a screw 25 that also secures the central blade in a transverse slot. The blades 22, 23 are flanged at 22<1>, 23<1>.
GB2463420A 1920-08-25 1920-08-25 Improvements in or relating to stone drills or augers Expired GB171792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2463420A GB171792A (en) 1920-08-25 1920-08-25 Improvements in or relating to stone drills or augers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2463420A GB171792A (en) 1920-08-25 1920-08-25 Improvements in or relating to stone drills or augers

Publications (1)

Publication Number Publication Date
GB171792A true GB171792A (en) 1921-11-25

Family

ID=10214798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2463420A Expired GB171792A (en) 1920-08-25 1920-08-25 Improvements in or relating to stone drills or augers

Country Status (1)

Country Link
GB (1) GB171792A (en)

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