2181927

Information

• Patent Grant
• 2181927

• References
• Source

• Patent Number

  2,181,927

• Date Filed

  Not available

• Date Issued

  Tuesday, December 5, 1939
  85 years ago

• CPC

  • F28F13/08 - by varying the cross-section of the flow channels
  • F28F1/02 - Tubular elements of cross-section which is non-circular
  • F28F1/36 - the means being helically wound fins or wire spirals
  • F28F1/26 - the means being integral with the element
  • F28F1/426 - the outside portions and the inside portions forming parts of complementary shape
  • F28F2225/04 - for conduits
  • Y10S29/041 - Taper tube making
  • Y10T29/49382 - Helically finned

• US Classifications

  • 165 - Heat exchange
  • 029 - Metal working
  • D23 - Environmental heating and cooling