2981172

Information

• Patent Grant
• 2981172

• References
• Source

• Patent Number

  2,981,172

• Date Filed

  Not available

• Date Issued

  Tuesday, April 25, 1961
  63 years ago

• CPC

  • F24F13/1413 - using more than one tilting member
  • F04D25/14 - and having shutters
  • F24F13/1426 - characterised by actuating means
  • F24F13/1406 - characterised by sealing means
  • F24F2013/148 - with magnets
  • Y10S454/904 - Magnetic means to hold a damper closed

• US Classifications

  • 454 - Ventilation