Patent ID: 7360585

Claim:
A heat exchanger cooling fin for use in a fluid flow environment, comprising a fin plate having a series of substantially mutually parallel louvres each louvre having two opposite open edges such that adjacent open edges of adjacent louvres define a flow aperture, each louvre having a convex curved surface that faces in the opposite direction to a convex curved surface of each adjacent louvre, said series of louvres defining a nominal fluid flow path along the series over said convex curved surface of each louvre wherein said louvres are arranged such that fluid flowing from a first side of said fin plate through a first flow aperture to the second side of the fin plate and over a first louvre, follows a curved contour of the convex surface of said first louvre through a second flow aperture to the first side of the fin plate and over the convex curved surface of a second louvre adjacent to said first louvre.