US3887826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for reducing audible noise in a dynamoelectric machine
Assignee: Ford Motor Co
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Filing: 1973-10-01
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Granted: 1975-06-03
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Expires: 1993-10-01
Abstract
Abstract The audible noise produced by a permanent magnet dynamoelectric machine may be reduced by securing the tips of the flux path members to the housing structure. Such machines, having the stator field producing structure located externally of a plastic housing structure, are provided with suitable securing of the flux path member tips to the plastic housing surface by interposing a semi-rigid bonding material, such as epoxy resin, therebetween. Preferably a hot melt curable material is used.
Inventors
- 👤 Theodore G Apostoleris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:00
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
In combination with a permanent magnet dynamoelectric machine of the type having a stator flux producing structure comprising a plurality of permanent magnets and ferromagnetic flux path means engaging pairs of the permanent magnets, the flux path members having intersecting edge surfaces forming flux path member tips, each of the permanent magnets being located in proximity to at lease one flux path member tip, the stator flux producing structure being held in cooperative association with means forming a housing to electromagnetically coact with a rotary armature, the improvement comprising means forming a semi-rigid bonding agent interposed between the housing and the flux path member tips in contact with the associated permanent magnets to bond the flux path member to the housing.
Claim 2
Dependent Claim
121 words
In combination with a permanent magnet dynamoelectric machine of the type having a stator flux producing structure comprising a plurality of permanent magnets and ferromagnetic flux path means engaging pairs of the permanent magnets, the flux path members having intersecting edge surfaces forming flux path member tips, each of the permanent magnets being located in proximity to at lease one flux path member tip, the stator flux producing structure being held in cooperative association with means forming a housing to electromagnetically coact with a rotary armature, the improvement comprising means forming a semi-rigid bonding agent interposed between the housing and the flux path member tips in contact with the associated permanent magnets to bond the flux path member to the housing.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |