3815694

Information

• Patent Grant
• 3815694

• References
• Source

• Patent Number

  3,815,694

• Date Filed

  Not available

• Date Issued

  Tuesday, June 11, 1974
  50 years ago

• CPC

  • E21B10/32 - with expansible cutting tools
  • B23B51/0045 - by expanding or tilting the toolhead
  • Y10S408/704 - Drilling small holes
  • Y10T408/85884 - Tool pivotally mounted on support
  • Y10T408/8595 - Pivotable tool-support

• US Classifications

  • 175 - Boring or penetrating the earth
  • 408 - Cutting by use of rotating axially moving tool