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. 01, 2005
Filed:
Mar. 11, 2003
Tadafumi Shimizu, Ogori, JP;
Shouichi Kitagawa, Fukuoka, JP;
Masahiro Samei, Fukuoka, JP;
Kazunori Matsuo, Kasuga, JP;
Keiichi Matsuzaki, Kurume, JP;
Kenji Asakura, Kyoto, JP;
Hideki Tatematsu, Ashiya, JP;
Yuichi Monda, Kurume, JP;
Eiji Torikai, Fukuoka, JP;
Kazuhiko Soeda, Kasuga, JP;
Tadayuki Kajiwara, Chikushino, JP;
Tadafumi Shimizu, Ogori, JP;
Shouichi Kitagawa, Fukuoka, JP;
Masahiro Samei, Fukuoka, JP;
Kazunori Matsuo, Kasuga, JP;
Keiichi Matsuzaki, Kurume, JP;
Kenji Asakura, Kyoto, JP;
Hideki Tatematsu, Ashiya, JP;
Yuichi Monda, Kurume, JP;
Eiji Torikai, Fukuoka, JP;
Kazuhiko Soeda, Kasuga, JP;
Tadayuki Kajiwara, Chikushino, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A short ring is provided outside a support frame. In the short ring, eddy current is generated in such a direction as to cancel apart of a magnetic flux developed from the exciting coil when it is fed with current, which the part of the magnetic flux leaks to outside. When the eddy current is generated, a magnetic field is developed in such a direction as to cancel the magnetic field by the leaking flux, as taught by Fleming's law. The result is that unnecessary radiation by the leaking flux is prevented, and hence noise generation in other members or devices is suppressed.