DE304982C - - Google Patents

Info

Publication number
DE304982C
DE304982C DENDAT304982D DE304982DA DE304982C DE 304982 C DE304982 C DE 304982C DE NDAT304982 D DENDAT304982 D DE NDAT304982D DE 304982D A DE304982D A DE 304982DA DE 304982 C DE304982 C DE 304982C
Authority
DE
Germany
Prior art keywords
wing
cutting edges
wings
crown
deviates
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.)
Active
Application number
DENDAT304982D
Other languages
German (de)
English (en)
Publication of DE304982C publication Critical patent/DE304982C/de
Active 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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits

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)
DENDAT304982D Active DE304982C (OSRAM)

Publications (1)

Publication Number Publication Date
DE304982C true DE304982C (OSRAM)

Family

ID=558542

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT304982D Active DE304982C (OSRAM)

Country Status (1)

Country Link
DE (1) DE304982C (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863639A (en) * 1955-08-09 1958-12-09 Bredesen Leo Concave multiple cutting edge rock drill bit and die

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863639A (en) * 1955-08-09 1958-12-09 Bredesen Leo Concave multiple cutting edge rock drill bit and die

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