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US 5,544,698 AGranted
Differential coatings for microextruded tubes used in parallel flow heat exchangers
AssigneePeerless of America, Inc.
InventorRoger Paulman
Life of this patent
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AssigneePeerless of America, Inc.
InventorRoger Paulman
Estimating the term…
Microextruded tubes each having two side surfaces, front and trailing edge surfaces and two ends are provided for insertion into aligned slots in headers to complete a heat exchanger assembly. The tubes each include a first coating composition containing an adhesive binder vehicle, flux material and brazing alloy deposited on the side surfaces adjacent the ends of the tube. The first coating composition is structurally arranged and applied to engage the aligned slots in the headers upon the insertion of the ends of the tubes into the header. The side surfaces of the microextruded tube include a second surface coating containing an adhesive binder vehicle, flux material, zinc and silicon extending the length of side tube between the deposited first coatings. The front and trailing edge surfaces of the tube include a third surface coating composition containing adhesive binder vehicle, flux material and zinc. A method of manufacturing parallel flow-type heat exchangers is disclosed.
An elongated microextruded tube having two side surfaces, front and trailing edge surfaces and two ends which are each inserted into aligned slots in headers to complete a heat exchanger assembly, wherein said tube includes a first coating composition containing an adhesive binder vehicle, flux material and brazing alloy deposited on the side surfaces adjacent each of the ends of said tube, with said first coating composition on the side surfaces structurally arranged to engage the aligned slots in the headers to align and to control the depth of insertion of each of the ends of the tubes into the headers, with each of the side surfaces of said microextruded tube having a second side surface coating containing an adhesive binder vehicle, flux material, zinc and silicon extending the length of side tube between said first coating, and with each of the front and trailing edge surfaces having a third surface coating composition containing adhesive binder vehicle, flux material and zinc.
A method of manufacturing parallel flow-type heat exchanger assemblies including the steps of:
A method of manufacturing heat exchanger tubes for use in assembling parallel flow-type heat exchanger assemblies, including the steps of:
Dependencies are inferred from the claim text.