3467180

Information

• Patent Grant
• 3467180

• References
• Source

• Patent Number

  3,467,180

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1969
  55 years ago

• CPC

  • B21D15/06 - annularly
  • B21C37/154 - Making multi-wall tubes
  • B21C37/205 - with annular guides
  • B21C37/24 - annularly-ribbed tubes
  • F22D1/02 - with water tubes arranged in the boiler furnace, fire tubes, or flue ways
  • Y10S165/527 - Integrally formed
  • Y10T29/49378 - Finned tube
  • Y10T29/49911 - by expanding inner annulus
  • Y10T29/4994 - Radially expanding internal tube

• US Classifications

  • 165 - Heat exchange
  • 029 - Metal working
  • 138 - Pipes and tubular conduits