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. 30, 2001
Filed:
Jun. 29, 1999
Noriaki Kazama, Sendai, JP;
Tetsuya Katsumi, Miyagi-ken, JP;
Hideki Takeda, Sendai, JP;
Yoshinori Miura, Sendai, JP;
Other;
Abstract
A detector for the rotational angle of a motor and a small brushless or stepping motor having the detector built therein are disclosed. A sensor probe of the detector is provided with a wire configuration comprising a giant magnetoresistive element (sensor element) enabled to read a change in magnetic field up to at least 10 kOe, a first sensor lead and a second sensor lead connected one each to the opposite terminals of the magnetoresistive element, and an insulating layer interposed between the two sensor leads. The sensor probe of the detector is disposed inside a motor housing as approximated closely to the magnetic teeth of a rotor of the motor. The giant magnetoresistive element is formed of a magnetic particle dispersion type giant magnetoresistive material, an artificial lattice type giant magnetoresistive material, or a colossal magnetoresistive material.