3420155

Information

• Patent Grant
• 3420155

• References
• Source

• Patent Number

  3,420,155

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • A62B13/00 - Special devices for ventilating gasproof shelters
  • F24F11/043 - dependent on air-current or wind pressure
  • Y10S454/902 - Air raid shelter ventilation
  • Y10T137/7727 - Excessive flow cut-off
  • Y10T137/7728 - High pressure cut-off
  • Y10T137/773 - Fluid released trip
  • Y10T137/7869 - Biased open

• US Classifications

  • 454 - Ventilation
  • 137 - Fluid handling