Inner Fin
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 27, 2014
app pub date -
Nov 22, 2012
filing date -
Nov 30, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
There is provided an inner fin wherein: a sheet material is formed into an offset configuration in which grooves and ridges are formed alternately in a widthwise direction, and the grooves and the ridges are offset laterally at right angles to a gas flowing direction at predetermined length intervals in an alternate fashion; and a first projection and a second projection are formed for each segment surrounded by a pair of left and right side walls, by cutting either an upper surface portion or a lower surface portion and causing the cut surface portion to stand, the first projection being inclined towards an upstream side of the gas flowing direction, the second projection being disposed downstream of the first projection and being inclined towards a downstream side of the gas flowing direction at an angle equal to an angle at which the first projection is inclined.
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