3643583

Information

• Patent Grant
• 3643583

• References
• Source

• Patent Number

  3,643,583

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1972
  53 years ago

• CPC

  • F16K31/02 - electric magnetic
  • F16K1/221 - specially adapted operating means therefor
  • F16K31/44 - Mechanical actuating means
  • F16K35/16 - with locking member actuated by magnet
  • Y10S454/902 - Air raid shelter ventilation

• US Classifications

  • 454 - Ventilation