3838953

Information

• Patent Grant
• 3838953

• References
• Source

• Patent Number

  3,838,953

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1974
  50 years ago

• CPC

  • F16C19/54 - Systems consisting of a plurality of bearings with rolling friction
  • E21B4/02 - Fluid rotary type drives
  • F03C2/304 - having both the movements defined in sub-group F03C2/08 or F03C2/22 and relative reciprocation between members
  • F16C35/061 - mounting a plurality of bearings side by side

• US Classifications

  • 418 - Rotary expansible chamber devices
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth
  • 384 - Bearings