Control flow instability to reduce disk flutter and half...

Details Control flow instability to reduce disk flutter and half... Control flow instability to reduce disk flutter and half...

2004-09-30

2009-12-08

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

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Reexamination Certificate

active

07630166

ABSTRACT:
To reduce the whirling air vortices which are normally formed at the disc tip, the outer edge of the disc surface may be gradually thinned down to a sharp tip. An alternative approach, the disc tip is gradually reduced in width and rounded at its outer edge. A flow obstruction may be incorporated in the shroud adjacent the edge of the disc tip. This obstruction may comprise a small substantially rectangular insert extending from the inner edge of the housing. Or, the inner surface of the portion of the housing adjacent the ends of the disc may incorporate grooves therein. These grooves, which are roughly herringbone in shape, and would have their center near either the edge of disc in a single disc environment or mid-way between the disc in a two disc environment.

REFERENCES:
patent: 825065 (1906-07-01), Maitre
patent: 2631859 (1953-03-01), Ellsworth
patent: 4074330 (1978-02-01), Norton et al.
patent: 4546464 (1985-10-01), Inoue et al.
patent: 4578727 (1986-03-01), Hills
patent: 4978847 (1990-12-01), Fukunaga et al.
patent: 5128922 (1992-07-01), Inui et al.
patent: 5517372 (1996-05-01), Shibuya et al.
patent: 5696649 (1997-12-01), Boutaghou
patent: 5909661 (1999-06-01), Abramovitch et al.
patent: 5999369 (1999-12-01), Shimizu et al.
patent: 6462901 (2002-10-01), Tadepalli

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