Patent US3078381A successfully refreshed from Google Patents.
US3078381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet rotor for a dynamoelectric machine
Assignee: Siemens Schuckertwerke AG
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Filing: 1959-12-03
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Granted: 1963-02-19
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Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Volkrodt Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:25
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A SYNCHRONOUS DYNAMOELECTRIC MACHINE HAVING A STATOR MEMBER AND A ROTOR MEMBER, THE ROTOR MEMBER COMPRISING A CORE OF MAGNETIC MATERIAL HAVING CIRCUMFERENTIALLY SPACED SLOTS, A SQUIRREL CAGE WINDING SUPPORTED IN SAID SLOTS, SAID CORE BEING DIVIDED INTO MAGNETICALLY SEPARATED SEGMENTS BY RADIAL SLOTS FILLED WITH NON-MAGNETIC MATERIAL, AN AXIALLY MAGNETIZED RING MAGNET DISPOSED AXIALLY ADJACENT SAID CORE AND MEANS FOR PROVIDING A MAGNETIC RETURN PATH DISPOSED AXIALLY ADJACENT SAID PERMANENT MAGNET.
Claim 2
Dependent Claim
73 words
IN A SYNCHRONOUS DYNAMOELECTRIC MACHINE HAVING A STATOR MEMBER AND A ROTOR MEMBER, THE ROTOR MEMBER COMPRISING A CORE OF MAGNETIC MATERIAL HAVING CIRCUMFERENTIALLY SPACED SLOTS, A SQUIRREL CAGE WINDING SUPPORTED IN SAID SLOTS, SAID CORE BEING DIVIDED INTO MAGNETICALLY SEPARATED SEGMENTS BY RADIAL SLOTS FILLED WITH NON-MAGNETIC MATERIAL, AN AXIALLY MAGNETIZED RING MAGNET DISPOSED AXIALLY ADJACENT SAID CORE AND MEANS FOR PROVIDING A MAGNETIC RETURN PATH DISPOSED AXIALLY ADJACENT SAID PERMANENT MAGNET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |