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:
Oct. 05, 2021
Filed:
Jul. 14, 2017
Applicant:
Jtekt Corporation, Osaka, JP;
Inventors:
Kensuke Suzuki, Kashiwara, JP;
Wataru Yoshida, Kashiba, JP;
Assignee:
JTEKT CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 9/40 (2006.01); C21D 1/18 (2006.01); C21D 1/42 (2006.01); C21D 1/667 (2006.01); F16C 33/64 (2006.01); F16C 19/36 (2006.01);
U.S. Cl.
CPC ...
C21D 9/40 (2013.01); C21D 1/18 (2013.01); C21D 1/42 (2013.01); C21D 1/667 (2013.01); F16C 19/36 (2013.01); F16C 33/64 (2013.01); F16C 19/364 (2013.01); F16C 2204/66 (2013.01); F16C 2204/70 (2013.01); F16C 2223/10 (2013.01); Y02P 10/25 (2015.11);
Abstract
In a heat treatment method for obtaining a bearing ring for an annular roller bearing whose thickness changes in an axial direction, the heat treatment method includes (A) applying a quenching process to a work which is annular, made of high carbon chromium bearing steel, and having a thickness changing in an axial direction, (B) applying a tempering process to the work which is quenched to entirely soak the work in cooling liquid and inductively heat the work in a state that the work is soaked in the cooling liquid, and (C) applying a finishing process to the work which is tempered.