US Patent Issued to NTN on June 23 for "Ball screw device and electric actuator provided with same" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,061, issued on June 23, was assigned to NTN Corp. (Osaka, Japan).

"Ball screw device and electric actuator provided with same" was invented by Yuta Oku (Shizuoka, Japan) and Akio Kato (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ball screw device 4 includes a screw shaft 9 having a screw groove 9a formed in an outer peripheral surface, a nut 8 having a screw groove 8a formed in an inner peripheral surface, and a large number of balls 10 arranged between the screw groove 9a of the screw shaft 9 and the screw groove 8a of the nut 8. A ratio triangler/L1 of a radial gap triangler, which is a maximum amount of radial movement of the...