Patent ID: 6513587
Filing Date: 2003-02-04
Classification: B21D,F28F,Y10T

Abstract:
A heat exchanger fin collar for a plate-fin style heat exchanger for achieving improved contact area on the tube, comprising:an elongated fin portion for dissipating heat; and a collar leg connected with said fin portion, said collar leg having a height and including: a straight collar contact portion substantially perpendicular to said fin portion, wherein said contact portion has a collar contact height along which said contact portion contacts the tube, said collar contact height in the range of 0.008 to 0.080 inches; a first curved end portion having a first radius and extending from a first end of said contact portion; a stepped transitional portion connecting said contact portion and said elongated fin portion, said transitional portion having a second curved end portion having a second radius, said second curved end portion extending from said contact portion opposite said first end.