Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-06-20
2006-06-20
Klaowicz, William (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07064919
ABSTRACT:
In a disk storage apparatus having an actuator for loading/unloading a magnetic head with respect to a magnetic disk, a voltage signal generated when the actuator is driven is detected by a voltage detector, a speed load estimator estimates moving speed of the head and level of load disturbance added to the magnetic head from a driving signal in a driver of the actuator and the voltage signal, and outputs a speed estimating signal and a load estimating signal, a speed controller generates and outputs a speed control signal based on a speed command signal and the speed estimating signal, a synthesizer generates a driving signal from the load estimating signal and a speed control signal, and the apparatus loads and unloads the head at a stable speed against the load disturbance caused by friction or the like on a ramp block.
REFERENCES:
patent: 5182684 (1993-01-01), Baker et al.
patent: 5369345 (1994-11-01), Le et al.
patent: 5384676 (1995-01-01), Yokoyama et al.
patent: 5402400 (1995-03-01), Hamada et al.
patent: 5721648 (1998-02-01), Phan et al.
patent: 5940239 (1999-08-01), Lee et al.
patent: 5949608 (1999-09-01), Hunter
patent: 6046878 (2000-04-01), Liu et al.
patent: 6097564 (2000-08-01), Hunter
patent: 6108157 (2000-08-01), Yoneda et al.
patent: 6134071 (2000-10-01), Andoh et al.
patent: 6215609 (2001-04-01), Yamashita et al.
patent: 6229663 (2001-05-01), Yoneda et al.
patent: 6229664 (2001-05-01), Albrecht et al.
patent: 6363214 (2002-03-01), Merello et al.
patent: 6411457 (2002-06-01), Yamashita et al.
patent: 6496319 (2002-12-01), Kusumoto et al.
patent: 6563660 (2003-05-01), Hirano et al.
patent: 6590731 (2003-07-01), Pan et al.
patent: 6594102 (2003-07-01), Kanda et al.
patent: 6643088 (2003-11-01), Kawachi
patent: 6697207 (2004-02-01), Harmer
patent: 2 284 281 (1995-05-01), None
patent: 0 667 615 (1995-08-01), None
Inaji Toshio
Kohso Hiroshi
Klaowicz William
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
Tzeng Fred F.
LandOfFree
Disk storage apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disk storage apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk storage apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3678246