2669840

Information

• Patent Grant
• 2669840

• References
• Source

• Patent Number

  2,669,840

• Date Filed

  Not available

• Date Issued

  Tuesday, February 23, 1954
  70 years ago

• CPC

  • E21B6/08 - Separate drives for percussion and rotation
  • B25D9/12 - comprising a built-in liquid motor

• US Classifications

  • 060 - Power plants
  • 091 - Motors: expansible chamber type
  • 092 - Expansible chamber devices
  • 173 - Tool driving or impacting