3918843

Information

• Patent Grant
• 3918843

• References
• Source

• Patent Number

  3,918,843

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1975
  49 years ago

• CPC

  • F04B49/106 - Responsive to pumped volume
  • E21B47/0008 - Survey of walking-beam pump systems
  • F04B47/02 - the driving mechanisms being situated at ground level
  • F04B49/02 - Stopping, starting, unloading or idling control
  • F04B49/065 - and making use of computers
  • F04B2201/02071 - Total number of pumping strokes
  • F04B2205/13 - Pressure pulsations after the pump
  • F04B2205/16 - Opening or closing of a valve in a circuit

• US Classifications

  • 417 - Pumps