US3246187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite core rotors
Assignee: Sanyo Electric Co Ltd
•
Filing: 1963-04-02
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Granted: 1966-04-12
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Iemura Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K1/2733; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A FERRITE CORE ROTOR ASSEMBLY FOR A MOTOR COMPRISING: A CYLINDRICAL CORE OF FERRITE MATERIAL HAVING SECTIONS MAGNETIZED ABOUT THE PERIPHERY THEREOF ALTERNATELY IN OPPOSITE POLARITY, SAID CORE HAVING AN AXIAL BORE EXTENDING THERETHROUGH, A ROTOR SHAFT EXTENDING THROUGH SAID AXIAL BORE, A RETAINER DISC FOR EACH END OF SAID CORE, EACH DISC BEING OF SUBSTANTIALLY THE SAME OUTER DIAMETER AS THE OUTER DIAMETER OF THE CORE AND BEING FORMED WITH A CENTRAL APERTURE TO FIT OVER SAID SHAFT AND WITH MEANS TO PROVIDE A SPACE BETWEEN THE ADJACENT END FACE OF THE CORE AND THE INNER FACE OF THE DISC SUBSTANTIALLY TO THE OUTER EDGE OF THE CORE, AND A CONTINUOUS LAYER OF ADHESIVE EXTENDING BETWEEN THE ROTOR SHAFT AND THE INNER WALL OF THE AXIAL BORE OF THE CORE AND THE END FACES OF THE CORE AND ADJACENT INNER FACES OF THE RETAINER DISCS TO FORM AN INTEGRAL ROTOR ASSEMBLY.
Claim 2
Dependent Claim
152 words
A FERRITE CORE ROTOR ASSEMBLY FOR A MOTOR COMPRISING: A CYLINDRICAL CORE OF FERRITE MATERIAL HAVING SECTIONS MAGNETIZED ABOUT THE PERIPHERY THEREOF ALTERNATELY IN OPPOSITE POLARITY, SAID CORE HAVING AN AXIAL BORE EXTENDING THERETHROUGH, A ROTOR SHAFT EXTENDING THROUGH SAID AXIAL BORE, A RETAINER DISC FOR EACH END OF SAID CORE, EACH DISC BEING OF SUBSTANTIALLY THE SAME OUTER DIAMETER AS THE OUTER DIAMETER OF THE CORE AND BEING FORMED WITH A CENTRAL APERTURE TO FIT OVER SAID SHAFT AND WITH MEANS TO PROVIDE A SPACE BETWEEN THE ADJACENT END FACE OF THE CORE AND THE INNER FACE OF THE DISC SUBSTANTIALLY TO THE OUTER EDGE OF THE CORE, AND A CONTINUOUS LAYER OF ADHESIVE EXTENDING BETWEEN THE ROTOR SHAFT AND THE INNER WALL OF THE AXIAL BORE OF THE CORE AND THE END FACES OF THE CORE AND ADJACENT INNER FACES OF THE RETAINER DISCS TO FORM AN INTEGRAL ROTOR ASSEMBLY.
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |