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:
Mar. 01, 1994
Filed:
Jun. 25, 1991
Takeshi Uda, Naka, JP;
Nippon Densan Corporation, Kyoto, JP;
Abstract
A magnetic recording device exhibiting reduced electromagnetic interference has a magnetic recording medium, a spindle motor for rotationally driving the magnetic recording medium, a magnetic head for writing and/or reading magnetic information and a shifting device for shifting the magnetic head. A stator core is provided with nine pole pieces divided into three groups of adjacent pole pieces. Each group of three adjacent pole pieces is wound with one of three different 3-phase coils such that adjacent pole pieces in a group have opposite polarities relative to a rotor magnet. The magnetic head is disposed corresponding to a specific slot of a stator core in the spindle motor. A shift route thereof extends outwards virtually in the radial direction from the specific slot.