US4814654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator or rotor based on permanent magnet segments
Assignee: Individual
•
Filing: 1984-10-12
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Granted: 1989-03-21
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Expires: 2004-10-12
Abstract
Abstract The novel rotor or stator comprises a symmetrical assembly of permanent-magnet segments, the working faces of which are separated. Each segment is magnetized to have one pole extending across one-half of its working face and the opposite pole extending across the other half. Because adjacent halves of adjacent working faces have like polarity, it appears that flux emanating from the segments between adjacent magnet segments is redirected more orthogonally with respect to the working faces, thus enhancing efficiency. The segments may either be parts of a single permanent magnet or individual pieces, and their working faces may together define either a cylinder or a plane.
Inventors
- 👤 Sten R. Gerfast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:19
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791; H02K1/2793; H02K1/2795; H02K23/00; H02K23/02; H02K23/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A permanent magnet rotor or stator component for a dynamoelectric machine, said component comprising a symmetrical assembly of an even number of identical permanent-magnet segments having at an air gap working faces which are separated from each other, wherein the improvement comprises: each permanent-magnet segment is magnetized to have one pole extending across one-half of its working face, the opposite pole extending across the other half of its working face, and adjacent halves of adjacent working faces having like polarity.
Claim 2
Dependent Claim
80 words
A permanent magnet rotor or stator component for a dynamoelectric machine, said component comprising a symmetrical assembly of an even number of identical permanent-magnet segments having at an air gap working faces which are separated from each other, wherein the improvement comprises: each permanent-magnet segment is magnetized to have one pole extending across one-half of its working face, the opposite pole extending across the other half of its working face, and adjacent halves of adjacent working faces having like polarity.
Claim 3
Dependent Claim
18 words
A permanent-magnet component as defined in claim 1 wherein each of said segments is spaced from adjacent segments.
Claim 4
Dependent Claim
21 words
A permanent-magnet component as defined in claim 1 wherein adjacent segments contact each other in areas remote from their working faces.
Claim 5
Dependent Claim
16 words
A permanent-magnet component as defined in claim 2 wherein each segment is a molded permanent magnet.
Claim 6
Dependent Claim
21 words
A permanent-magnet component as defined in claim 4 wherein each molded permanent magnet comprises magnetic particles dispersed in a flexible binder.
Claim 7
Dependent Claim
20 words
A permanent-magnet component as defined in claim 1 wherein each of the segments is part of a single permanent magnet.
Claim 8
Dependent Claim
20 words
A permanent-magnet component as defined in claim 1 wherein the working faces of the magnet segments together form a cylinder.
Claim 9
Dependent Claim
21 words
A permanent magnet component as defined in claim 1 wherein the working faces of the magnet segments lie in a plane.
Claim 10
Dependent Claim
19 words
A dynamoelectric machine, one rotor or stator component of which is a permanent-magnet component as defined in claim 1.
Claim 11
Dependent Claim
16 words
A permanent-magnet component as defined in claim 3 wherein each segment is an individual permanent magnet.
References Cited (Backward Citations)
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US3219861A
Cited
US3231770A
Cited
US3331973A
Cited
US3249780A
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |