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:
Jan. 18, 2000
Filed:
Sep. 20, 1995
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A magneto-optic disk-driving spindle motor has a rotary shaft for driving a spindle hub. Bearings support the rotary shaft for free rotation. A stator core is fixed relative to the bearings, and a driving magnet is fixed relative to the spindle hub. The spindle hub is provided with an upper side having a magneto-optic disk loading face for receiving and supporting a magneto-optic disk, and an axial part that is to be fitted into the center hole of the magneto-optic disk. A lower side of the spindle hub has a connection for connecting the axial upper end of the rotary shaft to the lower shaft of the spindle hub so as to fix the spindle hub to the rotary shaft. By having the axial part on the spindle hub as opposed to the end of the rotary shaft, the rotary shaft can have a diameter other than the diameter required for engagement with the center hole of the magneto-optic disk.