Patent ID: 7380327
Filing Date: 2008-06-03
Classification: B23K,Y10T

Abstract:
1. A method of securing a second tube to a first tube comprising: creating an oblong opening in a wall of said first tube, said oblong opening exhibiting a first major dimension; deforming said second tube from a generally circular cross-sectional configuration to an oblong cross-sectional configuration by applying stress to said second tube to form an oblong end exhibiting a second major dimension; inserting said oblong end of said second tube into said oblong opening in said first tube such that said second major dimension is aligned with said first major dimension; turning said second tube in said oblong opening to move said second major dimension of said oblong end out of alignment with said first major dimension of said oblong opening to secure said second tube to said first tube; and brazing said oblong end of said second tube at said oblong opening of said first tube following said turning operation.