3905580

Information

• Patent Grant
• 3905580

• References
• Source

• Patent Number

  3,905,580

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1975
  49 years ago

• CPC

  • F15B1/02 - Installations or systems with accumulators
  • E21B19/09 - specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
  • F15B11/02 - Systems ess entially incorporating special features for controlling the speed or actuating force of an output member
  • F15B2211/2053 - Type of pump
  • F15B2211/20576 - with multiple pumps
  • F15B2211/212 - the pressure sources being accumulators
  • F15B2211/216 - the pressure sources being pneumatic-to-hydraulic converters
  • F15B2211/30525 - Directional control valves
  • F15B2211/30535 - the pressure compensating valve is arranged between pressure source and directional control valve
  • F15B2211/3111 - the pump port being closed in the centre position
  • F15B2211/327 - electrically or electronically
  • F15B2211/40515 - with variable throttles or orifices
  • F15B2211/415 - characterised by the connections of the flow control means in the circuit
  • F15B2211/423 - manually
  • F15B2211/45 - Control of bleed-off flow
  • F15B2211/46 - Control of flow in the return lin
  • F15B2211/50518 - using pressure relief valves
  • F15B2211/528 - actuated by fluid pressure
  • F15B2211/55 - for limiting a pressure up to a maximum pressure
  • F15B2211/57 - Control of a differential pressure
  • F15B2211/625 - Accumulators
  • F15B2211/6309 - the pressure being a pressure source supply pressure
  • F15B2211/6313 - the pressure being a load pressure
  • F15B2211/6336 - representing a state of the output member
  • F15B2211/6651 - Control of the prime mover
  • F15B2211/6653 - Pressure control
  • F15B2211/7052 - Single-acting output members
  • F15B2211/851 - during starting
  • F15B2211/853 - during stopping
  • F15B2211/8606 - the abnormal condition being a shock
  • F15B2211/8613 - the abnormal condition being oscillations

• US Classifications

  • 060 - Power plants
  • 091 - Motors: expansible chamber type
  • 092 - Expansible chamber devices
  • 175 - Boring or penetrating the earth
  • 254 - Implements or apparatus for applying pushing or pulling force