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:
Aug. 01, 2006
Filed:
Mar. 15, 2004
Shigeo Obata, Hyogo, JP;
Kaoru Matsuoka, Osaka, JP;
Hideki Kuwajima, Kyoto, JP;
Kenichi Miyamori, Hyogo, JP;
Hiromitsu Noda, Osaka, JP;
Shigeo Obata, Hyogo, JP;
Kaoru Matsuoka, Osaka, JP;
Hideki Kuwajima, Kyoto, JP;
Kenichi Miyamori, Hyogo, JP;
Hiromitsu Noda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The stop ring having a surface nearly vertical to the rotational center axis, which is projected at the inner periphery of the hollow cylinder of the rotor section, and the stepped surface of the fixed shaft secured on the chassis are opposed to each other with a predetermined slight clearance provided therebetween. The clearance is filled with magnetic fluid, and further, a permanent magnet is disposed on the chassis, opposing to the other surface of the stop ring.