Patent ID: 8205332

Claim:
A method of forming a connecting rod, comprising: joining a first connecting rod blank and a second connecting rod blank together, said first connecting rod blank corresponding to a piston pin end of the connecting rod and including a first material, said second connecting rod blank corresponding to a crankshaft end of the connecting rod and including a second material different from said first material, said first and second connecting rod blanks having an interface between said piston pin and crankshaft ends; narrowing a cross-section of said blanks at said interface after joining said first and second connecting rod blanks; forming a piston pin aperture in said first connecting rod blank after joining said first and second connecting rod blanks; and forming a crankshaft pin aperture in said second connecting rod blank after joining said first and second connecting rod blanks; wherein at least one of said narrowing and said forming steps works a perimeter of said interface, thereby forming a generally smooth connecting rod surface about said perimeter of said interface.