3791461

Information

• Patent Grant
• 3791461

• References
• Source

• Patent Number

  3,791,461

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1974
  50 years ago

• CPC

  • B25D9/22 - involving a rotary-type slide valve
  • B25D9/12 - comprising a built-in liquid motor
  • E21B6/00 - Drives for combined percussion and rotary drilling

• US Classifications

  • 173 - Tool driving or impacting