3695349

Information

• Patent Grant
• 3695349

• References
• Source

• Patent Number

  3,695,349

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1972
  52 years ago

• CPC

  • F16K41/003 - by fluid
  • E21B33/064 - specially adapted for underwater well heads
  • F15B11/02 - Systems ess entially incorporating special features for controlling the speed or actuating force of an output member
  • F15B2211/212 - the pressure sources being accumulators
  • F15B2211/30505 - Non-return valves
  • F15B2211/30525 - Directional control valves
  • F15B2211/31576 - having a single pressure source and a single output member
  • F15B2211/327 - electrically or electronically
  • F15B2211/40515 - with variable throttles or orifices
  • F15B2211/413 - the positions being continuously variable
  • F15B2211/41545 - being connected to multiple output members
  • F15B2211/423 - manually
  • F15B2211/428 - actuated by fluid pressure
  • F15B2211/50536 - using unloading valves controlling the supply pressure by diverting fluid to the return line
  • F15B2211/5151 - being connected to a pressure source and a directional control valve
  • F15B2211/526 - electrically or electronically
  • F15B2211/55 - for limiting a pressure up to a maximum pressure
  • F15B2211/6051 - having valve means between output member and the load sensing circuit
  • F15B2211/6054 - using shuttle valves
  • F15B2211/625 - Accumulators
  • F15B2211/7053 - Double-acting output members
  • F15B2211/76 - Control of force or torque of the output member

• US Classifications

  • 166 - Wells
  • 251 - Valves and valve actuation