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:
Jul. 16, 2002
Filed:
Feb. 08, 2001
Applicant:
Inventors:
Michio Iihara, Iwata, JP;
Masami Yamaguchi, Iwata, JP;
Jun Yoshitomi, Iwata, JP;
Takeshi Maruyama, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/60 ;
U.S. Cl.
CPC ...
C21D 1/60 ;
Abstract
A distortion control method that can suppress distortion of a member during quenching and a cooling power measuring device that can precisely measure cooling power are provided. In the distortion control method, when the member is subjected to quenching using liquid cooling medium, the cooling power of the cooling medium being used is maintained within a prescribed range, so that variation in distortion suffered by the member is restricted.