US3309547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless alternator
Assignee: Emerson Electric Co
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Filing: 1962-11-13
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Granted: 1967-03-14
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard C Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/22; H02K19/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A BRUSHLESS SYNCHRONOUS DYNAMOELECTRIC MACHINE: A STATOR OF MAGNETIC MATERIAL; A ROTOR SHAFT OF MAGNETIC FLUX TRANSFER RELATIONSHIP THERETO, SAID SECOND HAVING POLE MEANS IN ROTATABLE WITHIN THE STATOR STRUCTURE; A TO SAID SHAFT AND ROTATABLE WITHIN THE STATOR STRUCTURE; AND SECOND ROTOR SECTION MOUNTED ON THE SHAFT BUT OUT OF MAGNETIC FLUX TRANSFER RELATIONSHIP THERETO, SAID SECOND ROTOR SECTION SECTION HAVING POLE MEANS ROTATABLE WITHIN THE STATOR STRUCTURE; SAID ROTOR SECTIONS BEING MAGNETICALLY SEPARATED PARTS OF A ROTOR STRUCTURE; SAID SECOND ROTOR SECTION HAVING A CYLINDRICAL PART LOCATED BEYOND THE STATOR IN MAGNETIC FLUX TRANSFER RELATIONSHIP TO ITS POLE MEANS; AND A NON-ROTARY FIELD MAGNET STRUCTURE HAVING ANNULAR
Claim 2
Dependent Claim
110 words
IN A BRUSHLESS SYNCHRONOUS DYNAMOELECTRIC MACHINE: A STATOR OF MAGNETIC MATERIAL; A ROTOR SHAFT OF MAGNETIC FLUX TRANSFER RELATIONSHIP THERETO, SAID SECOND HAVING POLE MEANS IN ROTATABLE WITHIN THE STATOR STRUCTURE; A TO SAID SHAFT AND ROTATABLE WITHIN THE STATOR STRUCTURE; AND SECOND ROTOR SECTION MOUNTED ON THE SHAFT BUT OUT OF MAGNETIC FLUX TRANSFER RELATIONSHIP THERETO, SAID SECOND ROTOR SECTION SECTION HAVING POLE MEANS ROTATABLE WITHIN THE STATOR STRUCTURE; SAID ROTOR SECTIONS BEING MAGNETICALLY SEPARATED PARTS OF A ROTOR STRUCTURE; SAID SECOND ROTOR SECTION HAVING A CYLINDRICAL PART LOCATED BEYOND THE STATOR IN MAGNETIC FLUX TRANSFER RELATIONSHIP TO ITS POLE MEANS; AND A NON-ROTARY FIELD MAGNET STRUCTURE HAVING ANNULAR
References Cited (Backward Citations)
US2384489A
Cited
US2479589A
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US2769106A
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US2928963A
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US2996791A
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US3239702A
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US3223916A
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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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |