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. 05, 2004
Filed:
Jul. 29, 2003
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A linear motor excellent in insulation between armature coils, easy to assemble, very small in thrust ripple, comprising a secondary side supporter attached with a secondary side consisting of a plurality of magnetic field poles, and an armature element supporter facing the secondary side via a clearance and provided with an armature element ( ) having a plurality of concentrate-wound armature coils ( ), the secondary side and the armature element ( ) being disposed facing each other and in parallel in the advancing direction, wherein field poles in the secondary side are disposed in the advancing direction of a mover with adjacent poles being unlike every Pm pitches, and a plurality of armature coils ( ) are disposed in an array in the advancing direction of the mover every Pc pitches, the coil pitch Pc=5/3×Pm.