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:
Apr. 18, 2017
Filed:
Jun. 09, 2014
Nsk Ltd., Tokyo, JP;
Keita Itagaki, Fujisawa, JP;
Soutarou Gunjima, Fujisawa, JP;
NSK LTD., Shinagawa-ku, Tokyo, JP;
Abstract
In a manufacturing process of a corrugated cage, an intermediate assemblyis configured by press-fitting each of press-fitting portionsandrespectively provided in base end portions of rod portionsandof rivetsandinto each of through-holesandof a cage elementon one side, and nitriding treatment is performed on the intermediate assembly. An axial dimension X of each of the press-fitting portionsandis made smaller than an axial dimension Y of each of the through-holesand(X<Y). In this way, portions which do not come into close contact with each other are provided in axial portions of the inner peripheral surface of each of the through-holesandand the outer peripheral surface of each of the rod portionsand, and thus a nitrided layer is formed on each of these portions which do not come into close contact with each other.