3336986

Information

• Patent Grant
• 3336986

• References
• Source

• Patent Number

  3,336,986

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1967
  57 years ago

• CPC

  • E21B6/06 - the rotation being intermittent, e.g.obtained by ratchet device
  • E21B6/08 - Separate drives for percussion and rotation
  • E21C3/18 - directly by a piston of an internal-combustion engine

• US Classifications

  • 173 - Tool driving or impacting