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. 13, 2005
Filed:
Jul. 28, 2003
Houng Joong Kim, Hitachi, JP;
Kohji Maki, Hitachi, JP;
Hisao Tadokoro, Hitachi, JP;
Hideki Shimane, Mito, JP;
Hitoshi Shibata, Hitachi, JP;
Keijirou Sakai, Kanasago, JP;
Houng Joong Kim, Hitachi, JP;
Kohji Maki, Hitachi, JP;
Hisao Tadokoro, Hitachi, JP;
Hideki Shimane, Mito, JP;
Hitoshi Shibata, Hitachi, JP;
Keijirou Sakai, Kanasago, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A drive apparatus overcomes the problems of ensuring accurate mounting of a plurality of armature coils relative to a plurality of magnetic pole position detectors, limitations concerning the location for mounting, and the extension of primary-side length. The drive apparatus comprises a primary side including an arrangement of a plurality of armatures each having a core made of a magnetic material with coil windings. It also comprises a secondary side including a permanent magnet movably supported relative to the armatures via a gap. A magnetic pole position detector is disposed between adjacent armatures.