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. 04, 2000
Filed:
Sep. 29, 1997
Mitsutoshi Nakane, Hitachinaka, JP;
Ryoichi Kobayashi, Toukai-mura, JP;
Noriyoshi Urushiwara, Hitachinaka, JP;
Hitachi, Ltd, Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka, JP;
Abstract
A rotating position detecting device is capable of detecting a rotating position with high accuracy even if there exists variation in the air gap, and thereby capable of widening a detectable range of the air gap. A position of an irregularity on the detected rotating body is converted into a rectangular wave-form electric signal, and a rotating position of the detected rotating body is detected based on a building-up signal or a falling signal of the rectangular wave-form. The rotating position detecting device has a magneto-electric converter element for outputting an electric signal corresponding to a magnetic intensity, a magnet for generating a magnetic field, and a detected rotating body made of a magnetic material having the irregularity.