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. 07, 2020
Filed:
Apr. 07, 2016
Ntn Corporation, Osaka, JP;
Toru Takahashi, Iwata, JP;
Shintarou Ueno, Azumino, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A magnetizing device includes a magnetization yoke including a pair of magnetization heads confronting each other through a magnetic gap, an excitation coil wound around the magnetization yoke, and a magnetization power supply that supplies a magnetizing current to the excitation coil to generate magnetic flux between the magnetization heads. A magnetic shield is provided on the magnetization yoke. The magnetic shield is spaced apart from one of the magnetization heads with a gap being formed therebetween along a direction in which the plurality of magnetic encoder tracks are arranged. The magnetic shield blocks a flow of magnetic flux that is present outside a defined extension of a flow of the magnetic flux between the pair of magnetization heads. The magnetic shield is of such a geometry that a thickness thereof progressively decreases towards the one of the magnetization heads.