HELICALLY WOUND FINNED TUBES FOR HEAT EXCHANGERS AND IMPROVED METHOD FOR SECURING FINS AT THE ENDS OF THE TUBES
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United States of America Patent
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Issued Date -
Jun 9, 2011
app pub date -
Dec 8, 2009
filing date -
Dec 8, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A finned tube for heat transfer from one medium to a second medium, and the method of manufacture, is disclosed. A helical fin of the finned tube has an area of compressed fins positioned proximate an insertion section which has a metal tube exposed with the helical fin removed therefrom. The compressed fins are a portion of the helical fin which has been compressed so that the helical fin in the area of the compressed fins is more closely spaced than the remaining portion of the helical fin. A base portion of the helical fin in the area of the compressed fins is layered and compressed on itself and is compressed against the metal tube. The layers of the base portion are compressed together and to the metal tube of the finned tube, which causes the layers of the base portion to bind together and bind to the metal tube to prevent movement of the helical fin in the area of the compressed fins in a direction parallel to the longitudinal axis of the finned tube.
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