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. 15, 2008
Filed:
Apr. 16, 2004
Tomonori Tominaga, Futtsu, JP;
Kazumi Matsuoka, Futtsu, JP;
Tadashi Ishikawa, Futtsu, JP;
Tadashi Kasuya, Futtsu, JP;
Koji Homma, Futtsu, JP;
Tomonori Tominaga, Futtsu, JP;
Kazumi Matsuoka, Futtsu, JP;
Tadashi Ishikawa, Futtsu, JP;
Tadashi Kasuya, Futtsu, JP;
Koji Homma, Futtsu, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A novel treatment method, for improving fatigue life, is provided that aims to resolve problems associated with conventional treatment methods for improving fatigue life of metal by reduction of stress concentration and conventional treatment methods for improving fatigue life of metal by introduction of compressive stress, that is, problems of poor efficiency in work execution, required level of skill of workers, and the impossibility of quality control due to lack of means for measuring the effect after treatment, characterized in that, for locations in metal for which fatigue is a problem, after pre-treatment is performed, ultrasonic impact treatment is performed, and thereafter, a quality assurance test is performed so as to improve the fatigue life of the metal.