3789786

Information

• Patent Grant
• 3789786

• References
• Source

• Patent Number

  3,789,786

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1974
  51 years ago

• CPC

  • B21D53/02 - heat exchangers or parts thereof
  • B21C37/225 - longitudinally-ribbed tubes
  • B21C37/26 - helically-ribbed tubes
  • B21D53/08 - of both metal tubes and sheet metal
  • F28F1/105 - the means being corrugated elements extending around the tubular elements
  • Y10T29/49382 - Helically finned
  • Y10T29/49881 - of separate helix [e.g., screw thread]
  • Y10T29/53122 - including deforming means

• US Classifications

  • 029 - Metal working