ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,729, issued on Feb. 24, was assigned to Spirit AeroSystems Inc. (Wichita, Kan.).
"System and method for drilling a hole for a countersink fastener" was invented by Lawrence Wendell Clement (Wichita, Kan.) and Victor Bradley Cunningham (Wichita, Kan.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drilling apparatus and method for forming a countersunk hole into a structure. The drilling apparatus may include a drill motor housing assembly, a rotor/spindle assembly, a countersink cage, and a countersink cutter. The drill motor housing assembly may have an inlet air duct, the rotor/spindle assembly may have a first duct and the countersink cage may h...