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. 04, 2005
Filed:
Dec. 17, 2001
Akihisa Inatani, Kanagawa, JP;
Kumi Koyama, Kanagawa, JP;
Hajime Mizuno, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
A disc chucking device is provided which holds a disc-shaped recording medium on a disc table and rotates it along with the disc table. It includes a disc table whose rotation-center line is laid generally orthogonally to the vertical direction and onto which a disc-shaped recording medium is set with the main side thereof being parallel to the vertical direction, a centering block formed on the disc table and which is to be fitted in a central hole in the disc-shaped recording medium, a motor to rotate the disc table, a clamper to pinch along with the disc table the disc-shaped recording medium put on the disc table, and a fall-off preventive structure provided on the disc table for engagement with the disc-shaped recording medium at the central hole formed in the latter.