Patent US5483400A successfully refreshed from Google Patents.
US5483400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk drive apparatus
Assignee: HGST Netherlands BV
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Filing: 1994-01-03
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Granted: 1996-01-09
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Expires: 2014-01-03
Abstract
Abstract Disclosed is a disk drive for storing representations of data. The disk drive includes a housing or enclosure. At least one disk is rotatably attached to the housing. Also attached to the housing is an actuator. A transducing head is attached to one end of the actuator and is positioned to pass near the disk. Attached on the other end of the actuator is a coil which makes up a portion of a voice coil motor. Another portion of the voice coil motor is a magnet positioned near the coil. The housing includes at least one recess or opening which holds the magnet on the outside of the housing yet near the coil.
Inventors
- 👤 Hitoshi Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:05
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/113; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A disk drive apparatus for storing information comprising: a housing providing a base for mounting components of said disk drive; at least one disk rotatably mounted on said housing; an actuator attached to said housing, said actuator having a first end and a second end, and pivoting about an axis parallel to the axis of rotation of said disk; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; a first permanent magnet for creating a magnetic field surrounding said coil, said field used for positioning said actuator; wherein said housing has a first opening therein near said coil, said first permanent magnet being positioned within said first opening and attached to the outside of said housing opposite said coil.
Claim 2
Dependent Claim
130 words
A disk drive apparatus for storing information comprising: a housing providing a base for mounting components of said disk drive; at least one disk rotatably mounted on said housing; an actuator attached to said housing, said actuator having a first end and a second end, and pivoting about an axis parallel to the axis of rotation of said disk; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; a first permanent magnet for creating a magnetic field surrounding said coil, said field used for positioning said actuator; wherein said housing has a first opening therein near said coil, said first permanent magnet being positioned within said first opening and attached to the outside of said housing opposite said coil.
Claim 3
Dependent Claim
60 words
The disk drive apparatus of claim 1, further comprising: a second permanent magnet for creating said magnetic field surrounding said coil; wherein said housing has a second opening therein near said coil on a side opposite the first opening, said second permanent magnet being positioned within said second opening and attached to the outside of said housing opposite said coil.
Claim 4
Dependent Claim
31 words
The disk drive apparatus of claim 1, wherein said first magnet is mounted directly to a flat yoke, said yoke being attached to the outside of said housing opposite said coil.
Claim 5
Dependent Claim
170 words
A disk drive apparatus for storing information comprising: a housing providing a base for mounting components of said disk drive; at least one disk rotatably mounted on said housing; an actuator attached to said housing, said actuator having a first end and a second end, and pivoting about an axis parallel to the axis of rotation of said disk; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; a first permanent magnet for creating a magnetic field surrounding said coil, said field used for positioning said actuator, wherein said housing has a first opening therein near said coil, said first permanent magnet being positioned within and substantially filling said first opening, said first permanent magnet being attached to said housing; a flat yoke, said first permanent magnet being mounted directly to said flat yoke, said yoke being attached to the outside of said housing opposite said coil, wherein said yoke is larger than said opening and overlaps said opening.
Claim 6
Dependent Claim
170 words
A disk drive apparatus for storing information comprising: a housing providing a base for mounting components of said disk drive; at least one disk rotatably mounted on said housing; an actuator attached to said housing, said actuator having a first end and a second end, and pivoting about an axis parallel to the axis of rotation of said disk; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; a first permanent magnet for creating a magnetic field surrounding said coil, said field used for positioning said actuator, wherein said housing has a first opening therein near said coil, said first permanent magnet being positioned within and substantially filling said first opening, said first permanent magnet being attached to said housing; a flat yoke, said first permanent magnet being mounted directly to said flat yoke, said yoke being attached to the outside of said housing opposite said coil, wherein said yoke is larger than said opening and overlaps said opening.
Claim 7
Dependent Claim
39 words
The disk drive apparatus of claim 4, wherein said housing includes a relief surrounding said opening, said relief having a depth, said yoke abutting said relief, wherein the depth of said relief coincides with the height of said yoke.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-08 | 1999-07-10 | 2000-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-08 | 2003-07-10 | 2004-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-08 | 2007-07-10 | 2008-01-09 | $7700.00 | Window Closed / Lapsed |