Disc drive impaction filter damping vibrations while trapping particulate contaminants
First Claim
1. A filtration system for a disc drive, comprising:
- an elongate perimeter filter extending alongside and adjacent to a portion of an outer perimeter of a disc in the disc drive, constructed of a material that dampens mechanical energy, wherein the damping material has a textured surface for collecting particulates that impact the textured surface and wherein the elongate perimeter filter extends at least about 180 degrees around the outer perimeter of the disc.
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Accused Products
Abstract
A particulate filter for a disc drive also functions as an acoustic noise filter and a mechanical vibration filter. The impaction filter covers substantial portions of the interior of the disc drive housing, thus reducing particulates in both radial and tangential airflow currents. The impaction filter is constructed of a soft material, such as polypropylene and modified acrylic fibers, so that particulates are bound to the surface of the impaction filter upon impact. The textured surface of the filter and the static caused by the operation of the discs in close proximity with the filter cause the particulates to tend to remain bound to the filter. Because the impaction filter covers substantial portions of the interior of the disc drive housing, rather than specific locations within the housing, the particulates in the tangential airflow currents are reduced. Moreover, the fabrication and coverage area of the impaction filter reduces acoustic noise and mechanical vibrations.
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Citations
19 Claims
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1. A filtration system for a disc drive, comprising:
an elongate perimeter filter extending alongside and adjacent to a portion of an outer perimeter of a disc in the disc drive, constructed of a material that dampens mechanical energy, wherein the damping material has a textured surface for collecting particulates that impact the textured surface and wherein the elongate perimeter filter extends at least about 180 degrees around the outer perimeter of the disc. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A data storage device having a filtration system comprising:
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a particulate filter extending at least about 180 degrees around an outer perimeter of a disc mounted for rotation within the data storage device; and
a mechanical energy filter means integrated with the particulate filter for reducing mechanical vibrations. - View Dependent Claims (14, 15, 16, 17, 18, 19)
an arcuate cap filter above and adjacent to a top surface of the disc, constructed of a material that dampens mechanical energy and has a textured surface for collecting particulates that impact the textured surface.
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18. The data storage device of claim 17 wherein the damping material comprises polypropylene and acrylic fibers.
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19. The data storage device of claim 18, further comprising an elongate perimeter filter constructed of a damping material and extending along a portion of an outer perimeter of a disc.
Specification