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:
Apr. 05, 2016
Filed:
Oct. 26, 2011
Yuji Gotoh, Oita, JP;
Noriyoshi Takaoka, Kanagawa-ken, JP;
Kazuhiro Kawasaki, Kanagawa-ken, JP;
Yoshitaka Misaka, Kanagawa-ken, JP;
Yuji Gotoh, Oita, JP;
Noriyoshi Takaoka, Kanagawa-ken, JP;
Kazuhiro Kawasaki, Kanagawa-ken, JP;
Yoshitaka Misaka, Kanagawa-ken, JP;
NETUREN CO., LTD., Tokyo, JP;
Abstract
A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed.