Method of attenuating airflow disturbances in a hard disk...

Details Method of attenuating airflow disturbances in a hard disk... Method of attenuating airflow disturbances in a hard disk...

2006-03-14

2006-03-14

Letscher, George J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

Reexamination Certificate

active

07012782

ABSTRACT:
A method of attenuating airflow disturbances in a hard disk drive utilizes a completely circumferential shroud around the motor hub flange of a hard disk drive spindle motor. The shroud is continuous, smooth, and uniform, and formed at the same axial height as the flange to reduce airflow disturbances that are generated by the rotating motor hub flange. Unlike prior art designs that provide openings to accommodate the actuator, the present design has no openings or irregular shapes that can cause airflow disturbance. Airflow disturbance, especially when near the actuator arms or head suspensions, can impact track misregistration. In addition, the probability of circulating contamination particles inside the motor out into the disk drive enclosure is also reduced due to less irregular airflow patterns.

REFERENCES:
patent: 5631787 (1997-05-01), Huang et al.
patent: 6369977 (2002-04-01), Imai et al.
patent: 6507462 (2003-01-01), Gibbs et al.
patent: 6621658 (2003-09-01), Nashif

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