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. 26, 1999
Filed:
Jul. 19, 1996
Katsuyuki Konishi, Kashihara, JP;
Shoji Maekawa, Shiki-gun, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A disk hub of the present invention is provided with a hub's main body to which a magnetic plate is attached, an energy director for ultrasonically joining the disk, and a center hole to which a disk-drive spindle is inserted. The hub's main body, the energy director and the circumferential edge of the center hole are integrally molded into one part from a hard synthetic resin with which an abrasion-resistant resin in fine powder form such as, for example, fluororesin is blended. Thus, the friction resistance of the circumferential edge of the center hole is reduced, and abrasion of the center hole is also reduced even after repeated inserting and removing operations of the spindle into and from the center hole. Moreover, when, for example, poly-tetra-fluoroethylene, which is easily available at low costs, is used as the fluororesin, it becomes possible to provide an inexpensive disk hub, and also to reduce the friction resistance of the circumferential edge of the center hole effectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile