ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,488, issued on Sept. 9.
"Method for manufacturing bearing ring member" was invented by Nobuyuki Hagiwara (Takasaki, Japan) and Kenji Tezuka (Takasaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing a bearing ring member includes an inversion step of sandwiching a workpiece including a workpiece body portion having an annular shape between a punch disposed on a first side in an axial direction and a die disposed on a second side opposite to the first side, and deforming the workpiece such that the workpiece body portion has a cylindrical shape. The inversion step includes, in the following order, a first step of defo...