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:
Oct. 20, 2009
Filed:
Sep. 07, 2005
Yasuhiro Matsumoto, Niiza, JP;
Nobutaka Kubota, Tokyo, JP;
Takeshi Noda, Tokyo, JP;
Kazuhiro Matsuo, Tokyo, JP;
Kenji Kato, Tokyo, JP;
Mitsutaka Homma, Tokorozawa, JP;
Takao Wakabayashi, Tokyo, JP;
Yasuhiro Matsumoto, Niiza, JP;
Nobutaka Kubota, Tokyo, JP;
Takeshi Noda, Tokyo, JP;
Kazuhiro Matsuo, Tokyo, JP;
Kenji Kato, Tokyo, JP;
Mitsutaka Homma, Tokorozawa, JP;
Takao Wakabayashi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A highly efficient electromagnetic actuator which can reduce leakage of the magnetic flux is provided. The electromagnetic actuator comprises a first coil, a movable bodyadapted to move on the central axis of the first coil, a first statorcovering the top face, bottom face and outer peripheral face of the first coil, and a permanent magnetadapted to firmly latch the movable bodyat one end point of its movable range. A second statoradapted to control the magnetic flux generated from the permanent magnetis provided in succession with the first stator. By providing the second stator, when releasing the movable bodyfrom its firmly latched state, the permanent magnetis not inversely excited or demagnetized.