2889723

Information

• Patent Grant
• 2889723

• References
• Source

• Patent Number

  2,889,723

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1959
  65 years ago

• CPC

  • E21B19/089 - with a spring or an additional weight
  • B25H1/0035 - Extensible supports
  • E21B11/005 - Hand operated drilling tools
  • Y10T408/675 - including means to move Tool along tool-axis

• US Classifications

  • 173 - Tool driving or impacting
  • 248 - Supports
  • 408 - Cutting by use of rotating axially moving tool