2977989

Information

• Patent Grant
• 2977989

• References
• Source

• Patent Number

  2,977,989

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  64 years ago

• CPC

  • F16K11/163 - only turns
  • Y10T137/2496 - Self-proportioning or correlating systems
  • Y10T137/2516 - Interconnected flow displacement elements
  • Y10T137/86686 - Plural disk or plug
  • Y10T137/87016 - Lost motion
  • Y10T137/87692 - With common valve operator
  • Y10T137/87917 - Flow path with serial valves and/or closures

• US Classifications

  • 137 - Fluid handling
  • 251 - Valves and valve actuation