US5442247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outer-rotor type spindle motor with a reduced thickness in the axial direction
Assignee: Minebea Co Ltd
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Filing: 1994-05-19
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Granted: 1995-08-15
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Expires: 2014-05-19
Abstract
Abstract In an outer-rotor type spindle motor: a front-end portion of a spindle (4) forming a stationary member passes through a central portion of a hub plate (7c) (onto which a disk (11) is loaded) of a rotor yoke (6) forming a rotating member; and, the front-end portion having been passed through the central portion of the hub plate (7a) of the rotor yoke (6) forms a head portion (4c) which is formed into a semispherical shape having been obliquely cut.
Inventors
- 👤 Yuzuru Suzuki
- 👤 Sakae Fujitani
- 👤 Masaaki Inagaki
- 👤 Hitoshi Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:37
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/54; F16C19/02; F16C19/04; F16C19/06; G; G11; G11B; G11B19/00; G11B19/20; G11B19/2009; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124; H02K5/16; H02K5/173; H02K5/1735; H02K5/1737; F16C2370/00; F16C2370/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
An outer-rotor type spindle motor in which: a front-end portion of a spindle forming a stationary member passes through a central portion of a hub plate onto which a disk is loaded of a rotor yoke forming a rotating member; and, said front-end portion having been passed through said central portion of said hub plate of said rotor yoke forms a head portion which is formed into a semispherical shape having been obliquely cut.
Claim 2
Dependent Claim
74 words
An outer-rotor type spindle motor in which: a front-end portion of a spindle forming a stationary member passes through a central portion of a hub plate onto which a disk is loaded of a rotor yoke forming a rotating member; and, said front-end portion having been passed through said central portion of said hub plate of said rotor yoke forms a head portion which is formed into a semispherical shape having been obliquely cut.
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) | 1998-08-14 | 1999-02-13 | 1999-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-14 | 2003-02-13 | 2003-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-14 | 2007-02-13 | 2007-08-15 | $7700.00 | Window Closed / Lapsed |