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Patent US5315464A successfully refreshed from Google Patents.
US5315464A
Expired / Lapsed
US
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Disk apparatus and manufacturing method thereof
Assignee: International Business Machines Corp
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Filing: 1991-07-17
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Granted: 1994-05-24
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Expires: 2011-07-17
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. A material which has low magnetic permeability or no magnetic permeability may be used to seal the opening or recess.
Inventors
- 👤 Hitoshi Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:33
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: 14
Claim 1
Independent Claim
87 words
A disk apparatus for storing information comprising: a disk; a head to read or write on said disk; a carriage to support said head; a coil connected to said carriage; an enclosure which envelops said disk, said head, said carriage and said coil; and a magnet positioned outside of said enclosure for supplying magnetic flux to said coil, wherein a portion of said enclosure located between said coil and said magnet is a thin film, said film being thin in relation to the thickness of said enclosure.
Claim 2
Dependent Claim
87 words
A disk apparatus for storing information comprising: a disk; a head to read or write on said disk; a carriage to support said head; a coil connected to said carriage; an enclosure which envelops said disk, said head, said carriage and said coil; and a magnet positioned outside of said enclosure for supplying magnetic flux to said coil, wherein a portion of said enclosure located between said coil and said magnet is a thin film, said film being thin in relation to the thickness of said enclosure.
Claim 3
Dependent Claim
31 words
The disk apparatus according to claim 1 wherein at least a portion of said enclosure located between said coil and said magnet is comprised of material that is low in magnetism.
Claim 4
Dependent Claim
27 words
The disk apparatus according to claim 2 wherein at least a portion of said enclosure located between said coil and said magnet is comprised of different materials.
Claim 5
Dependent Claim
16 words
The disk apparatus according to claim 2 wherein the enclosure is comprised of the same material.
Claim 6
Dependent Claim
29 words
The disk apparatus according to claim 1 wherein at least a portion of said enclosure located between said coil and said magnet is comprised of material that is non-magnetic.
Claim 7
Dependent Claim
16 words
The disk apparatus according to claim 5 wherein the enclosure is comprised of the same material.
Claim 8
Dependent Claim
40 words
The disk apparatus according to claim 1 wherein said magnet is a flat magnet, and wherein the enclosure has a recess therein, said recess formed in the enclosure opposite to said coil and said flat magnet positioned in said recess.
Claim 9
Dependent Claim
40 words
The disk apparatus according to claim 7 wherein said carriage is supported so that it can pivot with respect to a predetermined point, and current flowing in said coil causes said carriage to pivot with respect to said predetermined point.
Claim 10
Dependent Claim
35 words
The disk apparatus according to claim 7 wherein said enclosure has two recesses formed therein, each of said recesses positioned proximate to said coil and having a magnet positioned in each of said two recesses.
Claim 11
Independent Claim
115 words
A method of manufacturing a disk apparatus which includes a disk, a head to read or write on said disk, a carriage to support said head, and a coil connected to said carriage in an enclosure, said method comprising the steps of: making an enclosure assembly having an opening where said coil is positioned; covering said opening of said enclosure assembly with a thin film sheet, said film being thin in relation to the thickness of said enclosure; arranging said disk, said head, said carriage, and said coil at predetermined positions in said enclosure assembly; and positioning a magnet outside of said enclosure assembly so that said magnet is opposite to said thin film sheet.
Claim 12
Independent Claim
115 words
A method of manufacturing a disk apparatus which includes a disk, a head to read or write on said disk, a carriage to support said head, and a coil connected to said carriage in an enclosure, said method comprising the steps of: making an enclosure assembly having an opening where said coil is positioned; covering said opening of said enclosure assembly with a thin film sheet, said film being thin in relation to the thickness of said enclosure; arranging said disk, said head, said carriage, and said coil at predetermined positions in said enclosure assembly; and positioning a magnet outside of said enclosure assembly so that said magnet is opposite to said thin film sheet.
Claim 13
Dependent Claim
146 words
A disk drive for storing information comprising: a housing providing a base for mounting components of said disk drive; a hub rotatably attached to said housing for mounting at least one disk of said disk drive; an actuator attached to said housing, said actuator having a first end and a second end; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; wherein said housing has an opening therein near said coil, said opening being sealed with a thin film, said housing including said thin film enclosing said hub, said disk, said actuator, said head and said coil, said film being thin in relation to the thickness of said housing; and a magnet positioned within said opening and attached to the outside of said housing opposite said coil attached to the second end of said actuator.
Claim 14
Dependent Claim
146 words
A disk drive for storing information comprising: a housing providing a base for mounting components of said disk drive; a hub rotatably attached to said housing for mounting at least one disk of said disk drive; an actuator attached to said housing, said actuator having a first end and a second end; a head attached to said first end of said actuator; a coil attached to the second end of said actuator; wherein said housing has an opening therein near said coil, said opening being sealed with a thin film, said housing including said thin film enclosing said hub, said disk, said actuator, said head and said coil, said film being thin in relation to the thickness of said housing; and a magnet positioned within said opening and attached to the outside of said housing opposite said coil attached to the second end of said actuator.
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) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |