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:
Apr. 27, 1993
Filed:
Jul. 23, 1991
Toyoko Sakamoto, Miyagi, JP;
Taizo Aizawa, Miyagi, JP;
Sony Corporation, , JP;
Abstract
A magnetic recording disk with a central hub including a core member having a central aperture, a ring member mounted on the core member, a covering member, a leaf spring and a pulse generating member. The ring member includes a recessed portion, a pair of slotted portions for accomodating the leaf spring and a pair of swelled portions extending inwardly toward the central aperture of the core member. The pulse generating member is connected to the core member and extends through the ring member in the direction perpendicular to the surface of the core member so that a tip end of the pulse generating member is projected outwardly from a bottom surface of the recessed portion. When a spindle of a disk driving mechanism is inserted into a central bore of the disk, the axis of a spindle is consistent with the center of rotation of a magnetic recording medium, retained by the combination of the leaf spring and the swelled portions.