Patent US3588649A successfully refreshed from Google Patents.
US3588649A
Expired / Lapsed
US
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Speed-controllable capacitor motor
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1969-02-11
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Granted: 1971-06-28
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Expires: 1989-02-11
Abstract
Abstract A SPEED-CONTROLLABLE SINGLE-PHASE CAPACITOR MOTOR WHICH IS OPERABLE AT TWO STABLE SPEEDS THAT HAVE A RATIO, ONE TO THE OTHER, OF 3:1. THE MOTOR HAS THREE STATOR WINDINGS WHICH ARE CONNECTABLE IN THE STEINMETZ DELTA CONFIGURATION FOR OPERATION AT HIGH SPEED AND CONNECTABLE IN A CONFIGURATION WHICH FORMS AN AIRGAP FLUX HAVING THE ZERO-SEQUENCE SYSTEM AS SYMMETRICAL COMPONENTS FOR OPERATION AT LOW SPEED.
Inventors
- 👤 Gunter Heine
- 👤 Carsten Droge
- 👤 Joseph Ludemann
- 👤 Ingo Koch
- 👤 Elimar Christoffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:02
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/08
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 |