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:
Sep. 08, 2009
Filed:
Oct. 21, 2004
Takefumi Kabashima, Fukuoka, JP;
Ryuichiro Tominaga, Fukuoka, JP;
Kazutoshi Imai, Fukuoka, JP;
Yuji Arinaga, Fukuoka, JP;
Motomichi Ohto, Fukuoka, JP;
Hirotoshi Hayakawa, Saitama, JP;
Takefumi Kabashima, Fukuoka, JP;
Ryuichiro Tominaga, Fukuoka, JP;
Kazutoshi Imai, Fukuoka, JP;
Yuji Arinaga, Fukuoka, JP;
Motomichi Ohto, Fukuoka, JP;
Hirotoshi Hayakawa, Saitama, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
Provided is a magnetic encoder device capable of detecting a rotating angle of an actuator having a cavity structure. The magnetic encoder device includes a ring-shaped rotating body, a ring-shaped permanent magnetwhich is inscribed in and fixed to an inner circumferential side of the ring-shaped rotating bodyand magnetized in a direction perpendicular to a center axis of the rotating body, and a fixed bodywhich is disposed on an inner circumferential side of the permanent magnetthrough an air gap and has a circular circumference and a cavity, and a magnetic field detecting elementdisposed on an outer circumferential side of the fixed bodythrough the permanent magnetand the air gap.