ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,916, issued on Oct. 14, was assigned to Honda Motor Co. Ltd. (Tokyo).
"Spot welding method" was invented by Shinya Watanabe (Tochigi, Japan), Hitoshi Saito (Tochigi, Japan) and Xihao Tan (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a spot welding method capable of reliably welding a metal sheet laminate while suppressing occurrence of expulsion. In the spot welding method, a pulse current is applied in a first current application step and a second current application step by a DC chopping control method. In the DC chopping control method, a pulse waveform of the pulse current is generated by switching between current ap...