3757856

Information

• Patent Grant
• 3757856

• References
• Source

• Patent Number

  3,757,856

• Date Filed

  Not available

• Date Issued

  Tuesday, September 11, 1973
  51 years ago

• CPC

  • B21D22/04 - for dimpling
  • B21D53/04 - of sheet metal
  • B21D53/08 - of both metal tubes and sheet metal
  • F28D1/0391 - a single plate being bent to form one or more conduits
  • F28D2021/0094 - for recooling the engine coolant
  • F28F2001/027 - with dimples
  • Y10S165/442 - Conduits
  • Y10T29/49366 - Sheet joined to sheet

• US Classifications

  • 165 - Heat exchange
  • 029 - Metal working