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:
Jan. 19, 2010
Filed:
Jan. 29, 2009
Applicants:
Yoshimasa Tanaka, Hiratsuka, JP;
Hisaki Koga, Kariya, JP;
Kazuhiro Kawasaki, Hiratsuka, JP;
Inventors:
Assignee:
Neturen Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A heat treatment apparatuscomprises a supporting unitfor supporting a columnar workpieceturnably, and an induction-heating coilfor induction-heating the workpiecesupported turnably by the supporting unit. Below the workpiecesupported by the supporting unit, a cooling tankis provided which contains a liquid coolant. The workpieceis made of steel such as carbon steel for mechanical structure, and spring steel. The workpieceis made of a material which has a magnetic transformation point at 770° C. The material is ferromagnetic below this temperature, and becomes paramagnetic above this temperature.