US3413501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motors
Assignee: Duracell Inc USA
•
Filing: 1966-05-31
•
Granted: 1968-11-26
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Gianni A Dotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A MOTOR COMPRISING: A STATOR; A PAIR OF FIELD COILS DISPOSED ON SAID STATOR SO AS TO PROVIDE A PAIR OF DISTINCT MAGNETIC FIELDS; A PLURALITY OF SHADING RINGS DISPOSED ON SAID STATOR SO AS TO DEFINE A MAGNETIC FLUX PATH ASSOCIATED WITH EACH OF SAID DISTINCT MAGNETIC FIELDS; A ROTOR ROTATABLY MOUNTED ON SAID MOTOR BETWEEN SAID FIELS COILS AND IN THE PATH OF EACH OF SAID MAGNETIC FLUX PATHS; AND MEANS FOR CONNECTING SAID FIELD COILS TO AN ALTERNATING CURRENT POWER SOURCE SO AS TO CHANGE THE POLARITY OF SAID MAGNETIC FIELDS WITH EACH HALF-CYCLE, THEREBY CAUSING SAID ROTOR TO ROTATE.
Claim 2
Dependent Claim
103 words
A MOTOR COMPRISING: A STATOR; A PAIR OF FIELD COILS DISPOSED ON SAID STATOR SO AS TO PROVIDE A PAIR OF DISTINCT MAGNETIC FIELDS; A PLURALITY OF SHADING RINGS DISPOSED ON SAID STATOR SO AS TO DEFINE A MAGNETIC FLUX PATH ASSOCIATED WITH EACH OF SAID DISTINCT MAGNETIC FIELDS; A ROTOR ROTATABLY MOUNTED ON SAID MOTOR BETWEEN SAID FIELS COILS AND IN THE PATH OF EACH OF SAID MAGNETIC FLUX PATHS; AND MEANS FOR CONNECTING SAID FIELD COILS TO AN ALTERNATING CURRENT POWER SOURCE SO AS TO CHANGE THE POLARITY OF SAID MAGNETIC FIELDS WITH EACH HALF-CYCLE, THEREBY CAUSING SAID ROTOR TO ROTATE.
References Cited (Backward Citations)
US2037606A
Cited
US1917289A
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US2062322A
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US2071244A
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US2253524A
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US3191083A
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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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |