US Patent Issued to NSK on Dec. 30 for "Rolled thread screw and rolled thread screw manufacturing method" (Japanese Inventor)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,111, issued on Dec. 30, was assigned to NSK LTD. (Tokyo).

"Rolled thread screw and rolled thread screw manufacturing method" was invented by Takeshi Saito (Gunma, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rolled thread screw includes: a screw part having, on an outer circumferential part of the screw part, thread crests and thread grooves disposed alternately along an axial direction of the rolled thread screw; and a columnar part adjoining at least one of both sides of the screw part in the axial direction. An axial end surface of the columnar part is provided with: a first concave surface concave in the axial direction; a second conca...