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:
May. 09, 2006
Filed:
Oct. 15, 2002
Takefumi Kabashima, Fukuoka, JP;
Kazunari Matsuzaki, Fukuoka, JP;
Koji Uemura, Fukuoka, JP;
Takashi Nagase, Fukuoka, JP;
Takefumi Kabashima, Fukuoka, JP;
Kazunari Matsuzaki, Fukuoka, JP;
Koji Uemura, Fukuoka, JP;
Takashi Nagase, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A multirotation type encoder of the invention includes a first encoderattached to a rotating shaftof a rotating machinefor detecting an absolute value rotational angle within one rotation, and a second encoder for counting a multirotation amount of the rotating shaftby using a speed reducing mechanismby magnetic coupling and the second encoderis constituted by a first magnetic geardirectly connected to the rotating shaft and magnetized in multiple poles and at least one second magnetic geararranged to be opposed thereto in noncontact and magnetized in multiple poles by a number of magnetic poles larger than that of the first magnetic gearand is constituted to count a multirotation amount by detecting a rotational angle of the second magnetic gear by the second encoder.