Patent ID: 6739386
Filing Date: 2004-05-25
Classification: F28F,Y10T

Abstract:
A heat exchanger, comprising:a heat exchanger core having a plurality of flat tubes with fins between adjacent tubes, said tubes each having flat side walls connected by front and rear walls defining a flow path, all of said walls extending longitudinally between opposite tube ends with said tube side walls defining a first height; first tube end portions in said tube ends of a plurality of said plurality of flat tubes, said first tube end portions including said flat side walls flared apart to define a second height greater than said first height; second tube end portions in said tube ends of said plurality of said plurality of flat tubes, said second tube end portions including a longitudinally extending cut through said front and rear walls with said flat side walls flared apart to define a third height greater than said second height; said side walls of adjacent tubes being secured together at said tube ends; and headers or tanks connected to said tube front and rear walls at said first and second tube end portions whereby said headers or tanks communicate with said tube flow paths.