3780575

Information

• Patent Grant
• 3780575

• References
• Source

• Patent Number

  3,780,575

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • F15B11/16 - with two or more servomotors
  • E21B49/10 - using side-wall fluid samplers or testers
  • F15B2211/20515 - Electric motor
  • F15B2211/30505 - Non-return valves
  • F15B2211/40515 - with variable throttles or orifices
  • F15B2211/41572 - being connected to a pressure source and an output member
  • F15B2211/426 - electrically or electronically
  • F15B2211/50518 - using pressure relief valves
  • F15B2211/50563 - the pressure control means controlling a differential pressure
  • F15B2211/555 - for assuring a minimum pressure
  • F15B2211/575 - Pilot pressure control
  • F15B2211/6051 - having valve means between output member and the load sensing circuit
  • F15B2211/6309 - the pressure being a pressure source supply pressure
  • F15B2211/6313 - the pressure being a load pressure
  • F15B2211/6651 - Control of the prime mover
  • F15B2211/6653 - Pressure control
  • F15B2211/7055 - having more than two chambers
  • F15B2211/7107 - the output members being mechanically linked
  • F15B2211/7128 - the chambers being connected in parallel
  • F15B2211/7142 - the output members being arranged in multiple groups
  • F15B2211/7716 - with automatic return

• US Classifications

  • 073 - Measuring and testing
  • 166 - Wells