Patent ID: 6935414

Claim:
A tube for a heat exchanger comprising: an extruded tube wail defining a plurality of passages extending in a longitudinal direction parallel to the tube wall, wherein the plurality of passages are arranged in at least two rows substantially parallel to a major axis of the tube cross-section and are staggered, wherein a first line passes through midpoints of line segments which pass through the passages of a first row and a second line passes through midpoints of line segments which pass through the passages of a second row, the line segments being parallel to a minor axis of the tube cross-section, wherein the first line and the second line are offset from each other, and wherein straight lines pass between adjacent passages in the first row and adjacent passages in the second row without intersecting the passages, the straight lines extending from a first side of the tube wall to a second side of the tube wall, the first side being opposite to the second side.