Disk drive and breather filter having multiple ventilation...

Details Disk drive and breather filter having multiple ventilation... Disk drive and breather filter having multiple ventilation...

2006-06-20

2006-06-20

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

Reexamination Certificate

active

07064920

ABSTRACT:
A disk drive has an internal breather filter that performs a filtration function while maintaining ventilation with an exterior of the drive. The filter circulates a gas between an interior and the exterior of its enclosure. The enclosure includes a first ventilation path for circulating the gas from the exterior to the filter, and a second ventilation path for circulating the gas from the filter to the exterior. In addition, a method of inspecting the filter and disk drive is disclosed. The method includes a compressing and decompressing step of compressing and decompressing the inside of the enclosure, a measuring step of measuring pressure in the enclosure, and a judging step of judging whether attachment of the filter is adequate on the basis of a value of the pressure measured.

REFERENCES:
patent: 5030260 (1991-07-01), Beck et al.
patent: 5997614 (1999-12-01), Tuma et al.
patent: 6395073 (2002-05-01), Dauber
patent: 6683746 (2004-01-01), Kuroki et al.
“Additional Path for HDD Breather Hole”Research Disclosure, Feb. 2000, pp. 385-386, No. 430, Kenneth MasonPublications, Hampshire, Great Britain.
“Laminar Flow Thin Chemical Breather Filter for Direct Access Storage Device”IBM Technical Disclosure Bulletin, 1992, pp. 341-342, vol. 34, No. 8, IBM Corporation, New York, U.S.
“Breather Filter Structure Having Diffusion Channel on Plate”IBM Technical Disclosure Bulletin, Jun. 1, 1995, pp. 93-94, vol. 38, No. 6, IBM Corporation, New York, U.S.
“Snorkel Breather Filter”IBM Technical Disclosure Bulletin, May 1, 1990, p. 37, vol. 32, No. 12, IBM Corporation, New York, U.S.

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