3885622

Information

• Patent Grant
• 3885622

• References
• Source

• Patent Number

  3,885,622

• Date Filed

  Not available

• Date Issued

  Tuesday, May 27, 1975
  49 years ago

• CPC

  • F28F1/40 - the means being only inside the tubular element
  • B21C37/0803 - the tubes having a special shape
  • B21C37/083 - Supply, or operations combined with supply, of strip material
  • F28F1/42 - the means being both outside and inside the tubular element
  • F28F1/426 - the outside portions and the inside portions forming parts of complementary shape
  • F28F13/14 - by endowing the walls of conduits with zones of different degrees of conduction of heat
  • F28F13/187 - especially adapted for evaporator surfaces or condenser surfaces
  • Y10S29/023 - Method or apparatus with knurling
  • Y10S165/515 - Patterned surface

• US Classifications

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