Passive fly height adjustment to compensate for ambient...

Details Passive fly height adjustment to compensate for ambient... Passive fly height adjustment to compensate for ambient...

2005-02-15

2009-12-29

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C360S234600, C360S294700

Reexamination Certificate

active

07639449

ABSTRACT:
A disk drive includes a drive circuitry, a suspension, a slider assembly that includes a read/write head, and a pressure compensator. The pressure compensator is electrically decoupled from the drive circuitry. A portion of the pressure compensator has a volume that passively changes when an ambient pressure near the pressure compensator changes. The pressure compensator at least partially offsets a change in a head-to-disk spacing that occurs when an ambient pressure near the pressure compensator changes. The pressure compensator can exert a force on the slider assembly to change a pivot angle between the suspension and the slider assembly, and/or to change a pitch angle between the slider assembly and the storage disk. In alternate embodiments, the pressure compensator can include a piston that moves or a resilient membranous material that changes shape based on changes in ambient pressure.

REFERENCES:
patent: 2937240 (1960-05-01), Harker
patent: 3488648 (1970-01-01), Church
patent: 5454157 (1995-10-01), Ananth et al.
patent: 6317286 (2001-11-01), Murphy et al.
patent: 6567235 (2003-05-01), Kasetty et al.

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