3838666

Information

• Patent Grant
• 3838666

• References
• Source

• Patent Number

  3,838,666

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1974
  50 years ago

• CPC

  • F28D7/1669 - the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
  • F22B31/08 - Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
  • F24H1/403 - the water tubes being arranged in one or more circles around the burner
  • F24H9/1836 - fluid combustible heating means
  • F28D9/0081 - the conduits for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
  • F28F1/42 - the means being both outside and inside the tubular element
  • F28F1/422 - with outside means integral with the tubular element and inside means integral with the tubular element
  • F28F13/08 - by varying the cross-section of the flow channels
  • Y10S122/01 - Air heater

• US Classifications

  • 122 - Liquid heaters and vaporizers