3677665

Information

• Patent Grant
• 3677665

• References
• Source

• Patent Number

  3,677,665

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • F04C2/1071 - the inner and outer member having a different number of threads and one of the two being made of elastic materials
  • E21B43/128 - Adaptation of pump systems with down-hole electric drives
  • F04C13/008 - Pumps for submersible use
  • F04D13/028 - the driving means being a planetary gear

• US Classifications

  • 417 - Pumps
  • 418 - Rotary expansible chamber devices