Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Reexamination Certificate
2006-10-31
2006-10-31
Letscher, George J. (Department: 2653)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
Reexamination Certificate
active
07130151
ABSTRACT:
In a disk device, having disks2and a hub4for holding thereof, to be attached onto a shaft5of a spindle motor, for rotary drive thereof, a groove42is formed on a bottom surface of a flange portion41of the hub4, for receiving therein. A balance weight8to be received in this groove42has elasticity and an outer configuration of about “C”, and further, in a portion thereof is attached at least one (1) piece of an auxiliary weight or more, thereby achieving unbalance correction at high accuracy with an aid of the balance weight. After being attached with one (1) piece or more of the “U” shaped auxiliary weight(s) directing it/them from an inner periphery to an outer periphery thereof, the “C” shaped balance weight is inserted or fitted into, while being suppressed a little bit in an inside thereof. Therefore, a disk device and the unbalance correcting method for that, can be obtained, in which spaces necessary for attaching and detaching are less, but enabling the balance correction at high accuracy.
REFERENCES:
patent: 6356409 (2002-03-01), Price et al.
patent: 6608733 (2003-08-01), Elsing
patent: 11-353788 (1999-12-01), None
Horinouchi Masatoshi
Kouno Takashi
Nakamiya Teruhiro
Okazaki Toshihisa
Antonelli, Terry Stout and Kraus, LLP.
Hitachi Global Storage Technologies Japan Ltd.
Letscher George J.
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