3633420

Information

• Patent Grant
• 3633420

• References
• Source

• Patent Number

  3,633,420

• Date Filed

  Not available

• Date Issued

  Tuesday, January 11, 1972
  53 years ago

• CPC

  • G05D7/0676 - by action on flow sources
  • G01F15/026 - using means to maintain zero differential pressure across the motor
  • Y10S388/906 - Proportional-integral system
  • Y10S388/915 - Sawtooth or ramp waveform generator
  • Y10S388/929 - Fluid/granular material flow rate, pressure, or level
  • Y10S388/933 - Radiant energy responsive device

• US Classifications

  • 073 - Measuring and testing
  • 388 - Electricity: motor control systems
  • 417 - Pumps