US3588557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low loss ventilation for salient pole machines
Assignee: Westinghouse Electric Corp
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Filing: 1969-02-19
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Granted: 1971-06-28
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Expires: 1989-02-19
Abstract
Abstract A VENTILATION ARRANGEMENT FOR A DYNAMOELECTRIC MACHINE HAVING A ROTOR INCLUDING SALIENT POLE MEMBERS. STRUCTURE IS PROVIDED FOR SUBSTANTIALLY INCREASING COOLING EFFICIENCY AND REDUCING WINDAGE LOOSES IN THE MACHINE, THE STRUCTURE COMPRISING MEANS FOR DIRECTING A COOLING GASEOUS FLUID AXIALLY OF THE ROTOR BETWEEN THE SALIENT POLES FROM ONE END OF THE ROTOR TO THE OTHER, AND MEANS FOR BRIDGING THE INTERPOLAR SPACE IN ORDER TO PREVENT A VORTEX OF THE FLUID FROM DEVELOPING BETWEEN ADJACENT POLES, AND FOR OTHERWISE RESTRICTING THE CROSS-SECTIONAL AREA FOR AXIAL FLOW OF THE COOLING FLUID TO INCREASE THE AXIAL VELOCITY THEREOF.
Inventors
- 👤 Lee A Kilgore
- 👤 Ragnvald Fergestad
- 👤 Tor Schanche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:17
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/24; H02K3/46; H02K3/52; H02K3/527
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |