ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,259, issued on Jan. 13, was assigned to NSK LTD. (Tokyo).
"Steering shaft and steering-shaft manufacturing method" was invented by Seiichi Moriyama (Gunma, Japan) and Tetsuya Kanou (Gunma, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A steering shaft includes an inner shaft including first tooth parts, an outer shaft including second tooth parts, and a resin layer. The resin layer includes a plurality of thick film parts and at least four thin film parts. Each thick film part is disposed with a gap from one of the second tooth parts, and each thin film part contacts both one of the first tooth parts and one of the second tooth parts. At a se...