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:
Feb. 19, 2019
Filed:
Sep. 05, 2014
Ntn Corporation, Osaka, JP;
Noriaki Miwa, Mie, JP;
Yukio Matsubara, Mie, JP;
NTN CORPORATION, Osaka, JP;
Abstract
Provided is a rolling device in which hydrogen is not easily accumulated within a roller element made of steel, such as an inner race and an outer race, and premature separation due to hydrogen embrittlement is prevented from occurring. A rolling bearinghaving an inner race, an outer race, and rolling bodies, and at least one selected from the inner race, the outer race, and the rolling bodiesis made of predetermined steel. At least a part of oxide-based inclusions included in the steel is covered by MnS, and a ratio of a number of oxide-based inclusions covered by MnS is over 40% of a total number of oxide-based inclusions having maximum diameter of 3 μm or greater in the steel.