Patent US2000058A successfully refreshed from Google Patents.
US3581394A
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Rotor annulus for electric generator
Assignee: Individual
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Filing: 1969-05-13
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Granted: 1971-06-01
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Expires: 1989-05-13
Abstract
Abstract A ROTOR ANNULUS FOR AN ELECTRIC GENERATOR COMPRISING AN ANNULAR RING OF MAGNETIC MEMBERS INCLUDING PERMANENT MAGNETS AND POLE PIECES ARRANGED IN RESPECTIVE ENDTO-END AND CIRCUMAXIAL ALTERNATE SERIES. A CIRCULAR SPRING BAND SURROUNDS THE RING OF MEMBERS IN PRESSING ENGAGEMENT WITH AT LEAST SOME OF THE MEMBERS TO HOLE ALL OF THE ELEMENTS OF THE ANNULUS IN SUBSTANTIALLY FIXED RELATIONSHIP WITH EACH OTHER.
Inventors
- 👤 Russell E Phelon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:34
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |