2870838

Information

• Patent Grant
• 2870838

• References
• Source

• Patent Number

  2,870,838

• Date Filed

  Not available

• Date Issued

  Tuesday, January 27, 1959
  65 years ago

• CPC

  • B23B51/0413 - with core-cutting-off devices
  • E21B25/14 - mounted on pivot transverse to core axis
  • Y10T82/128 - Pivoted to tool-carrier
  • Y10T82/16147 - Cutting couple straddling work
  • Y10T82/16442 - with means to circumrotate tool[s] about work

• US Classifications

  • 082 - Turning
  • 175 - Boring or penetrating the earth