Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
2011-04-12
2011-04-12
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890032, C029S890049, C029S890045
Reexamination Certificate
active
07921559
ABSTRACT:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
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Office Action from
Eisele Siegfried
Käsinger Rainer
Nies Jens
Stephan Bernhard
Straehle Roland
Besler Christopher
Bryant David P
Michael & Best & Friedrich LLP
Modine Manufacturing Company
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