US3226579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current electric motor
Assignee: Mach Tronics Inc
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Filing: 1963-08-05
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Granted: 1965-12-28
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Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Perry A Bygdnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:40
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A SYNCHRONOUS MOTOR COMPRISING: A STATOR HAVING EXCITING WINDINGS TO PRODUCE A ROTATING ELECTROMAGNETIC FIELD AT A DESIRED ROTATIONAL SPEED AND HAVING SPEED VARIATION COMPONENTS THEREOF DURING EACH CYCLE OF ROTATION; AN OUTPUT SHAFT EXTENDING CENTRALLY WITHIN SAID STATOR; A ROTOR SURROUNDING SAID OUTPUT SHAFT AND BEING CAPABLE OF ROTATIVE MOVEMENT RELATIVE THEREWITH, SAID ROTOR INCLUDING A NON-MAGNETIC ARBOR, AND A HYSTERESIS RING OF MAGNETIC MATERIAL SUPPORTED ON SAID NON-MAGNETIC ARBOR; AND A ROTATIONAL COUPLER CONNECTED TO THE ARBOR OF SAID ROTOR AND TO THE OUTPUT SHAFT TO ROTATE THE OUTPUT SHAFT AT A SPEED CORRESPONDING TO THE ROTATIONAL SPEED OF SAID ROTOR AND TO ABSORB THE VARIATIONS THEREOF DURING EACH CYCLE OF ROTATION.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |