US Patent Issued to NSK on March 24 for "Ball screw device" (Japanese Inventor)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,544, issued on March 24, was assigned to NSK LTD. (Tokyo).

"Ball screw device" was invented by Ryo Segawa (Fujisawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ball screw device having a screw shaft, a nut, a plurality of balls, a carrier constituting a planetary reduction mechanism, a rolling bearing for rotatably supporting the carrier, where the screw shaft includes a screw portion having a spiral-shaped shaft-side ball screw groove on an outer circumferential surface thereof, and a fitting shaft portion, the carrier is fixed to the fitting shaft portion such that relative rotation is not possible, an inner ring raceway of the rollin...