The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2025
Filed:
Nov. 16, 2022
Nsk Ltd., Tokyo, JP;
Nobuyuki Hagiwara, Takasaki, JP;
Kenji Tezuka, Takasaki, JP;
NSK LTD., SHINAGAWA-KU, TOKYO, JP;
Abstract
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 deforming the workpiece using the punch and the die in a state where no sliding occurs between the workpiece and the die, and a second step of deforming the workpiece using the punch and the die in a state where a sliding occurs between the workpiece and the die.