Patent ID: 7954543

Claim:
A brazed heat exchanger, comprising: a plastic tank having a flange or foot portion at its open end; a core portion having a plurality of tubes; at least one header; a header portion of the at least one header having a side wall, a bottom wall, and an outer side wall forming an area for receiving the flange or foot portion fixed to the core portion; a plurality of hooks extending from the outer side wall of the header portion; a basically leak tight tank to header joint; a seal member disposed in between the wall area and the foot portion and the header; and at least one deformation formed in the outer side wall of the header portion at least between two of the plurality of hooks that are adjacent to each other; wherein the header portion, foot portion, and sealing member form the basically leak tight tank to header joint, and wherein the plurality of hooks are crimped over the flange or foot portion to fix the tank member to the header to form the tank to header joint; and wherein the at least one deformation is also formed on a radius linking the outer side wall and the bottom wall of said area for receiving the flange.