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US 2003/0156352 A1Published application
Multiple filter for use in a disc drive
OwnerRonald Lyle Voights, Quock Ying Nginventors
Life of this patent
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Abstract
A layer of air adjacent a disc surface in a disc drive is subject to contamination by particles. The disc is spun, inducing a radial air flow and a recirculation air flow. A particle impact layer around an outer disc edge traps a first portion of the particles carried by the radial air flow. A filter adjacent the outer disc edge includes a recirculation filter element that traps a second portion of the particles carried by the recirculation air flow. STL 10692
Claims21
A disc drive, comprising:
- a disc having a disc surface that extends from a central hub to an outer disc edge, the disc spinning about a central axis;
- a layer of air adjacent the disc surface and subject to contamination by particles, the disc surface inducing a radial air flow and a recirculation air flow;
- a shroud that is spaced apart from the outer disc edge and that faces the radial air flow;
- a particle impact layer that is disposed on the shroud;
- the particle impact layer being formed of a material that traps a first portion of the particles carried by the radial air flow;
- and
- a filter that is disposed adjacent the outer disc edge and that comprises a recirculation filter element that traps a second portion of the particles carried by the recirculation air flow.
4 more elements
A method of removing particles of contamination from a layer of air adjacent a spinning disc in a disc drive, comprising:
- providing a disc surface on the spinning disc that extends from a central hub to an outer disc edge, the spinning of the disc inducing a radial air flow and a recirculation air flow in the layer of air;
- positioning a shroud to be spaced apart from the outer disc edge and to face the radial air flow;
- providing a particle impact layer on the shroud that is formed of a material that traps a first portion of the particles carried by the radial air flow;
- and
- providing a filter adjacent the outer disc edge that comprises a recirculation filter element trapping a second portion of the particles carried by the recirculation air flow.
2 more elements
A disc drive, comprising:
- a disc surface on a spinning disc that extends from a central hub to an outer disc edge, the spinning of the disc inducing a radial air flow and a recirculation air flow in the layer of air, the layer of air being subject to contamination by particles;
- and a shroud spaced apart from the outer disc edge and facing the radial air flow;
- and
- means for removing particles in the radial air flow and the recirculation air flow.
1 more element
Dependencies are inferred from the claim text.