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US4782410A
Expired / Lapsed
US
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Housing structure for fixed magnetic disk device
Assignee: Mitsubishi Electric Corp
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Filing: 1987-05-19
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Granted: 1988-11-01
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Expires: 2007-05-19
Abstract
Abstract A fixed magnetic disk device having a spindle for rotating a disk and an actuator for moving a magnetic head, which comprises a housing having a trapezoidal or triangular shape with two openings on its sides at right angles, one of the openings being provided with a mounting flange for supporting both ends of the spindle, and the other opening adapted to receive the actuator, and a pair of covers flanged to both the openings.
Inventors
- 👤 Naohiro Okutsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:30
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/04; G11B25/043; G11B33/00; G11B33/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A housing structure for a fixed magnetic disk device, which comprises: a housing body having a polygonal shape defined by a plurality of sides; first and second sides of said polygonal housing body being made at right angles making first and second reference sides; said first reference side having a first opening with a mounting flange on which a magnetic disk stack may be pivotally mounted with a spindle; said second reference side having a second opening through which a rotational positioner may be inserted widthwise and mounted on a third side of said polygonal housing body; a first cover to be mounted on said first reference side for covering said first opening; and a second cover to be mounted on said second reference side for covering said second opening, thereby providing a housing structure which is rigid and compact yet easy-to-assemble with high precision.
Claim 2
Dependent Claim
145 words
A housing structure for a fixed magnetic disk device, which comprises: a housing body having a polygonal shape defined by a plurality of sides; first and second sides of said polygonal housing body being made at right angles making first and second reference sides; said first reference side having a first opening with a mounting flange on which a magnetic disk stack may be pivotally mounted with a spindle; said second reference side having a second opening through which a rotational positioner may be inserted widthwise and mounted on a third side of said polygonal housing body; a first cover to be mounted on said first reference side for covering said first opening; and a second cover to be mounted on said second reference side for covering said second opening, thereby providing a housing structure which is rigid and compact yet easy-to-assemble with high precision.
Claim 3
Dependent Claim
165 words
A housing structure for a fixed magnetic disk device, which comprises: a housing body having a trapezoidal shape defined by four sides; first and second sides of said trapezoidal housing body being made at right angles making first and second reference sides while a third side made at right angles with said second reference side so that said third side become parallel with respect to said first reference side; said first reference side having a first opening with a mounting flange on which a magnetic disk stack may be pivotally mounted with a spindle; said second reference side having a second opening through which a rotational positioner may be inserted widthwise and mounted on said third side; a first cover to be mounted on said first reference side for covering said first opening; and a second cover to be mounted on said second reference side for covering said second opening, thereby providing a housing structure which is rigid and compact yet easy-to-assemble with high precision.
Claim 4
Dependent Claim
165 words
A housing structure for a fixed magnetic disk device, which comprises: a housing body having a trapezoidal shape defined by four sides; first and second sides of said trapezoidal housing body being made at right angles making first and second reference sides while a third side made at right angles with said second reference side so that said third side become parallel with respect to said first reference side; said first reference side having a first opening with a mounting flange on which a magnetic disk stack may be pivotally mounted with a spindle; said second reference side having a second opening through which a rotational positioner may be inserted widthwise and mounted on said third side; a first cover to be mounted on said first reference side for covering said first opening; and a second cover to be mounted on said second reference side for covering said second opening, thereby providing a housing structure which is rigid and compact yet easy-to-assemble with high precision.
Claim 5
Dependent Claim
83 words
The housing structure of claim 2, wherein said rotational positioner comprises: a supporting section mounted on said third side; an actuator pivotally supported by said supporting section; an arm extending from said actuator in a direction perpendicular to said first reference side and parallel to said second reference side; and a magnetic head mounted on a free end of said arm so that it is moved in a radial direction of said disk stack when said actuator is pivoted on said supported section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |