US Patent Issued to HITACHI ASTEMO on Oct. 28 for "Manufacturing method of ball screw using rolling machine" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,000, issued on Oct. 28, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).

"Manufacturing method of ball screw using rolling machine" was invented by Kinichi Hashimoto (Hitachinaka, Japan) and Keisuke Kitamura (Hitachinaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rolling machine has a rolling die 4 that forms a male screw by pressing a steering shaft 14 which is an object to be rolled and plastically deforming an outer peripheral surface of the steering shaft 14 while rotating in contact with the outer peripheral surface of the steering shaft 14, a main spindle 3 inserted into a penetration hole 10 of the rolling die 4 and tran...