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. 15, 1997
Filed:
Feb. 27, 1995
Masaru Ikebe, Saku, JP;
Haruo Shiba, Komoro, JP;
Shinichi Satoh, Saku, JP;
Morimasa Sasaki, Saku, JP;
TDK Corporation, Tokyo-to, JP;
Abstract
A disc cartridge capable of permitting a hub to be constantly rotated about the center of rotation thereof without any eccentricity, to thereby ensure smooth and stable rotation of the disc. The hub is formed with three drive shaft inserting holes in a manner to be spaced from each other at equal intervals and positioned on a concentric circle of a predetermined radius defined about a center of rotation of the hub. The drive shaft inserting holes each are formed with a linear driven surface which is adapted to be contacted with a drive shaft inserted into the hole. The driven surface may be arranged at an angle of -30 to +30 degrees with respect to the center of rotation of the hub.