US5434729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disc driving motor
Assignee: Nidec Instruments Corp
•
Filing: 1993-09-20
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Granted: 1995-07-18
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Expires: 2013-09-20
Abstract
Abstract A magnetic disc driving motor comprises a hub for mounting a magnetic disc thereon, a motor stator for driving the hub rotationally, and a motor rotor formed in the hub and arranged to face the stator at a predetermined gap. A support is provided for supporting a bearing member for bearing the hub rotatably. A stator supporting portion is formed integrally with the support for supporting the stator. A motor frame is formed to cover the stator and the rotor. The motor frame is formed of a thin sheet. The motor frame is fixed to the motor frame by a mechanical device or an adhesive. Another similar motor arrangement includes a hub with a rotatable central shaft. In this arrangement, the frame, stator support and bottom seal for the bearings are formed of a thin sheet. The stator support is a U-shape which is force fit into a recess between the bearing holder and coil of the motor.
Inventors
- 👤 Kouichi Katakura
- 👤 Mituru Ide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:57
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/2009; H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/187; H02K5/00; H02K5/04; H02K5/16; H02K5/173; H02K5/1735; H02K5/1737; H02K5/12; H02K5/124
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A magnetic disc driving motor comprising: a hub for mounting a magnetic disc thereon; a motor stator having a core for driving said hub rotationally; a motor rotor formed in said hub and arranged to face said stator at a predetermined gap; a support supporting a bearing member for bearing said hub rotatably; a stator supporting portion formed integrally with said support for supporting said stator; and a motor frame formed as a base plate to cover said stator and said rotor, said motor frame being formed of a thin sheet which surrounds the rotor and extends beneath and adjacent to the stator core, and means for fixing said motor frame to said support.
Claim 2
Dependent Claim
114 words
A magnetic disc driving motor comprising: a hub for mounting a magnetic disc thereon; a motor stator having a core for driving said hub rotationally; a motor rotor formed in said hub and arranged to face said stator at a predetermined gap; a support supporting a bearing member for bearing said hub rotatably; a stator supporting portion formed integrally with said support for supporting said stator; and a motor frame formed as a base plate to cover said stator and said rotor, said motor frame being formed of a thin sheet which surrounds the rotor and extends beneath and adjacent to the stator core, and means for fixing said motor frame to said support.
Claim 3
Dependent Claim
20 words
The magnetic disc driving motor according to claim 1, wherein said motor frame is formed by pressing the thin sheet.
Claim 4
Dependent Claim
18 words
The magnetic disc driving motor according to claim 1, wherein said means for fixing includes a screw element.
Claim 5
Dependent Claim
25 words
The magnetic disc driving motor according to claim 1 wherein said means for fixing includes an adhesive for bonding the motor frame to the support.
Claim 6
Dependent Claim
125 words
A magnetic disc driving motor comprising: a hub for mounting a magnetic disc thereon, said hub including a rotatable shaft; a motor stator having a core for driving said hub rotationally; a motor rotor formed in said hub and arranged to face said stator at a predetermined gap; bearing elements for said rotatable shaft; a holder for positioning said bearing elements with respect to said rotatable shaft; a stator supporting portion for supporting said stator; and a motor frame formed as a base plate to cover said stator and said rotor; said motor frame being formed of a thin sheet which surrounds the rotor and extends beneath and adjacent to the stator core; said motor frame being disposed in part beneath said stator supporting portion.
Claim 7
Dependent Claim
125 words
A magnetic disc driving motor comprising: a hub for mounting a magnetic disc thereon, said hub including a rotatable shaft; a motor stator having a core for driving said hub rotationally; a motor rotor formed in said hub and arranged to face said stator at a predetermined gap; bearing elements for said rotatable shaft; a holder for positioning said bearing elements with respect to said rotatable shaft; a stator supporting portion for supporting said stator; and a motor frame formed as a base plate to cover said stator and said rotor; said motor frame being formed of a thin sheet which surrounds the rotor and extends beneath and adjacent to the stator core; said motor frame being disposed in part beneath said stator supporting portion.
Claim 8
Dependent Claim
29 words
The motor of claim 5 wherein said holder and said stator supporting portion are an integral unit and said motor frame is affixed to an indentation in said unit.
Claim 9
Dependent Claim
12 words
The motor of claim 5 including a seal disposed beneath said bearings.
Claim 10
Dependent Claim
24 words
The motor of claim 7 wherein said motor frame, stator supporting portion and seal are an integral unit and formed as a thin sheet.
Claim 11
Dependent Claim
26 words
The motor of claim 8 wherein said stator supporting portion is a U-shaped element which is force fit between the holder and coil of said stator.
References Cited (Backward Citations)
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Cited
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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) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |