ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,406, issued on June 24, was assigned to KTH Parts Industries Inc. (St. Paris, Ohio).
"Contoured electrodes for joining workpieces with curved surfaces" was invented by Michael J. Hayes (Fort Collins, Colo.) and Johnathan H. Mead (Columbus, Ohio).
According to the abstract* released by the U.S. Patent & Trademark Office: "A welding electrode for use in resistance spot welding an assembly of metal workpieces with curved surfaces and closed or open sections is disclosed. The welding electrode includes a body, a weld face at one end of the body, and contoured curvature forming the weld face. The contoured curvature is configured to seat around the curved surfaces of the metal workpie...