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:
Sep. 28, 2004
Filed:
Apr. 16, 1998
Applicant:
Inventors:
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 1/7028 ;
U.S. Cl.
CPC ...
G11B 1/7028 ;
Abstract
A disc driving apparatus is provided with: a turn table on which a disc type record medium is loaded; a clamper opposed to the turn table for clamping the disc type record medium on the turn table by means of a magnetic force applied between the turn table and the clamper; and a spindle motor for rotationally driving the turn table. The clamper has at least 3 abutting portions for abutting to the disc type record medium such that only one of the abutting portions is respectively on a line passing through a center of the clamper in a plain parallel to a record surface of the disc type record medium.