3143931

Information

• Patent Grant
• 3143931

• References
• Source

• Patent Number

  3,143,931

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1964
  60 years ago

• CPC

  • E21B6/08 - Separate drives for percussion and rotation
  • Y10T74/1527 - Screw and nut devices

• US Classifications

  • 091 - Motors: expansible chamber type
  • 074 - Machine element or mechanism
  • 092 - Expansible chamber devices
  • 173 - Tool driving or impacting