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:
Dec. 07, 2004
Filed:
Mar. 12, 2003
Toshiaki Fukushima, Tokorozawa, JP;
Kazuo Suzuki, Kawagoe, JP;
Shigeru Futakami, Tokorozawa, JP;
Takashi Abe, Tokyo, JP;
Takahiro Kawada, Higashimurayama, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
An actuator apparatus, comprising a rotating shaft supported in a freely rotating condition, a rotor magnet consisting of a permanent magnet which is polarized at two poles and is fastened to the rotating shaft; means for defining a first rotational position when the rotating shaft rotates in one direction; means for defining a second rotational position when the rotating shaft rotates in the other direction; and driving means for driving the rotating shaft and rotor magnet, wherein a self-hold state is formed by yokes arranged so as to form a closed magnetic circuit between the one pole and the other pole of the above-mentioned rotor magnet in at least one of the above-mentioned first rotational position and the second rotational position.