Patent US4640130A successfully refreshed from Google Patents.
Patent US3416017A successfully refreshed from Google Patents.
US3416017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-starting synchronous motor
Assignee: Individual
•
Filing: 1966-04-18
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Granted: 1968-12-10
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Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 William H Krug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:19
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ELECTRIC MOTOR COMPRISING: A PAIR OF AXIALLY SPACED, ANNULAR FLUX GENERATING ASSEMBLIES, EACH INCLUDING AN ANNULAR WINDING AND A GENERALLY TOROIDAL CORE OF MAGNETIC MATERIAL SUBSTANTIALLY SURROUNDING THE WINDING, THE CORE INCLUDING CIRCUMFERENTIALLY SPACED POLEPIECES TERMINATING IN EQUALLY ANGULARLY SPACED POLEFACES DISPOSED IN AN ANNULUS IN A PLANE NORMAL TO SAID AXIS, SUCCESSIVE POLEFACES BEING OF OPPOSITE MAGNETIC POLARITY WHEN THE WINDING IS ENERGIZED AND BEING SPACED APART BY EQUAL ARCUATE INTERVALS, THE POLEPIECES OF EACH ASSEMBLY EXTENDING CONCENTRICALLY TOWARD THE OTHER AND THE POLEFACES OF ONE BEING ALIGNED WITH THE ARCUATE INTERVALS OF THE OTHER; A DISK INCLUDING AN ANNULAR ROTOR OF HIGH RETENTIVITY MOUNTED FOR ROTATION BETWEEN SAID POLEFACE ANNULI AND IN AIRGAP RELATION THEREIN;
Claim 2
Dependent Claim
118 words
AN ELECTRIC MOTOR COMPRISING: A PAIR OF AXIALLY SPACED, ANNULAR FLUX GENERATING ASSEMBLIES, EACH INCLUDING AN ANNULAR WINDING AND A GENERALLY TOROIDAL CORE OF MAGNETIC MATERIAL SUBSTANTIALLY SURROUNDING THE WINDING, THE CORE INCLUDING CIRCUMFERENTIALLY SPACED POLEPIECES TERMINATING IN EQUALLY ANGULARLY SPACED POLEFACES DISPOSED IN AN ANNULUS IN A PLANE NORMAL TO SAID AXIS, SUCCESSIVE POLEFACES BEING OF OPPOSITE MAGNETIC POLARITY WHEN THE WINDING IS ENERGIZED AND BEING SPACED APART BY EQUAL ARCUATE INTERVALS, THE POLEPIECES OF EACH ASSEMBLY EXTENDING CONCENTRICALLY TOWARD THE OTHER AND THE POLEFACES OF ONE BEING ALIGNED WITH THE ARCUATE INTERVALS OF THE OTHER; A DISK INCLUDING AN ANNULAR ROTOR OF HIGH RETENTIVITY MOUNTED FOR ROTATION BETWEEN SAID POLEFACE ANNULI AND IN AIRGAP RELATION THEREIN;
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |