2172489

Information

• Patent Grant
• 2172489

• References
• Source

• Patent Number

  2,172,489

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • G05D23/136 - with pressure equalizing means
  • Y10T137/2516 - Interconnected flow displacement elements
  • Y10T137/87684 - Valve in each inlet
  • Y10T137/87853 - With threaded actuator

• US Classifications

  • 236 - Automatic temperature and humidity regulation
  • 137 - Fluid handling