Patent US3267309A successfully refreshed from Google Patents.
US3267309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-speed alternating-current machines
Assignee: Individual
•
Filing: 1963-06-26
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Granted: 1966-08-16
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 Cohen Elie
- 👤 Roth Szymon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:10
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/10; H02K7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A VARIABLE-SPEED ALTERNATING-CURRENT MACHINE COMPRISING: A CASING, AN ASYNCHRONOUS MOTOR HAVING A STATOR AND A ROTOR MOUNTED WITHIN SAID CASING, AN EDDY-CURRENT COUPLING OR BRAKING DEVICE HAVING INNER AND OUTER ROTORS COAXIAL WITH EACH OTHER AND MOUNTED WITHIN SAID CASING, A TUBULAR SHAFT ON WHICH SAID ROTOR OF THE MOTOR AND SAID OUTER ROTOR OF SAID EDDY-CURRENT DEVICE ARE MOUNTED, AND A FURTHER SHAFT EXTENDING THROUGH SAID TUBULAR SHAFT AND HAVING SAID INNER ROTOR OF SAID EDDY-CURRENT DEVICE MOUNTED THEREON, SAID TUBULAR SHAFT AND SAID FURTHER SHAFT EACH BEING SUPPORTED AT SPACED LOCATIONS ALONG THEIR LENGTH BY AT LEAST TWO BEARINGS MOUTED IN SAID FRAME, SAID TUBULAR SHAFT BEING ADDITIONALLY SUPPORTED IN A BEARING HOUSED IN SAID INNER ROTOR.
Claim 2
Dependent Claim
119 words
A VARIABLE-SPEED ALTERNATING-CURRENT MACHINE COMPRISING: A CASING, AN ASYNCHRONOUS MOTOR HAVING A STATOR AND A ROTOR MOUNTED WITHIN SAID CASING, AN EDDY-CURRENT COUPLING OR BRAKING DEVICE HAVING INNER AND OUTER ROTORS COAXIAL WITH EACH OTHER AND MOUNTED WITHIN SAID CASING, A TUBULAR SHAFT ON WHICH SAID ROTOR OF THE MOTOR AND SAID OUTER ROTOR OF SAID EDDY-CURRENT DEVICE ARE MOUNTED, AND A FURTHER SHAFT EXTENDING THROUGH SAID TUBULAR SHAFT AND HAVING SAID INNER ROTOR OF SAID EDDY-CURRENT DEVICE MOUNTED THEREON, SAID TUBULAR SHAFT AND SAID FURTHER SHAFT EACH BEING SUPPORTED AT SPACED LOCATIONS ALONG THEIR LENGTH BY AT LEAST TWO BEARINGS MOUTED IN SAID FRAME, SAID TUBULAR SHAFT BEING ADDITIONALLY SUPPORTED IN A BEARING HOUSED IN SAID INNER ROTOR.
References Cited (Backward Citations)
US3167674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |