ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,385, issued on Feb. 10, was assigned to NTN EUROPE (Annecy, France).
"Ball screw mechanism with asymmetrical angular threads" was invented by Julien Berthier (Saint-Jorioz, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ball screw mechanism, including a screw defining a reference axis, a nut and at least two balls positioned to roll on a screw thread formed on the screw and a nut thread formed on the nut, the screw thread and nut thread having a helical pitch P. In a sectional plane containing the reference axis and passing through a center of a ball, any segment perpendicular to the reference axis, located at a distance x from the center o...