Dynamic magnetic information storage or retrieval – Head mounting – For shifting head between tracks
Reexamination Certificate
2007-07-03
2007-07-03
Watko, Julie Anne (Department: 2627)
Dynamic magnetic information storage or retrieval
Head mounting
For shifting head between tracks
C360S266000
Reexamination Certificate
active
10881164
ABSTRACT:
The dynamics of a disk drive actuator are enhanced by redistributing the mass and stiffness of the structure. The two nodal points of the second primary bending mode of the actuator are relocated to positions that are both radially outboard of their original positions. One nodal point is positioned as close to the read-write head as possible at one end of the actuator, and the other nodal point is positioned at the center of the active legs of the VCM coil at the other end of the actuator. This is done to reduce the off-track displacement associated with this fundamental resonance to near zero, allowing higher track densities to be supported.
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J.S. Heath, “Design of a Swinging Arm Actuator for a Disk File”, IBM J. Res. Dev., Jul. 1976, pp. 389ff.
Johnson Brad Vaughn
Stacer Daniel R.
Bracewell & Giuliani LLP
Hitachi Global Storage Technologies - Netherlands B.V.
Watko Julie Anne
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