ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,988, issued on Aug. 5, was assigned to DuraForce Holdings LLC (Roanoke, Va.).
"Tapered fastener" was invented by Pierre A. Dionne (Roanoke, Va.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vibration resistant nut is provided for attaching a working surface to a threaded stud, the stud extending through a hole defined through the working surface. The nut includes an annulus for receiving the stud. The annulus includes a cylindrical portion and a tapered terminal end portion for being received in the hole. The tapered terminal end portion extends from the cylindrical portion. The tapered terminal end portion has an outer surface that narrows diamet...