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:
Feb. 27, 2007
Filed:
Feb. 16, 2005
Tomotaka Watanabe, Tokyo, JP;
Takehisa Ishihara, Tokyo, JP;
Shinsuke Terada, Tokyo, JP;
Takayuki Enomoto, Tokyo, JP;
Tomotaka Watanabe, Tokyo, JP;
Takehisa Ishihara, Tokyo, JP;
Shinsuke Terada, Tokyo, JP;
Takayuki Enomoto, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
In a rotation sensor including a rotormounted to a rotating shaft S and having a conductive sensing unitwhereof the width varies in the circumferential direction; and stationary coreseach including an exciting coil for forming a magnetic circuit with respect to the sensing unit of the rotor by allowing AC exciting current to flow therein, and a core body formed of magnetic material and retaining the exciting coil, and being mounted to the fixed member and disposed so as to oppose to the sensing unit of the rotor at a distance in the axial direction of the shaft, the stationary cores are disposed at two positions each having a central angle with respect to the axis of the shaft other than substantially 180°, so that the rotation sensor which is superior in mountability, is low in cost, and is superior in detection accuracy over a wider range is provided.