3564947

Information

• Patent Grant
• 3564947

• References
• Source

• Patent Number

  3,564,947

• Date Filed

  Not available

• Date Issued

  Tuesday, February 23, 1971
  54 years ago

• CPC

  • B24B3/32 - for thinning the point
  • B23B51/02 - Twist drills
  • B23B2251/18 - Configuration of the drill point
  • Y10T408/899 - Having inversely angled cutting edge
  • Y10T408/909 - Having peripherally spaced cutting edges
  • Y10T408/9097 - Spiral channel

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool
  • 451 - Abrading