US3561834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor having hypocyclically revolving rotor
Assignee: Systems Technology Inc
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Filing: 1969-03-19
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Granted: 1971-02-09
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Expires: 1989-03-19
Abstract
Abstract A STEPPER MOTOR HAVING A POLYPHASE STATOR AND A RIGID RING-LIKE ROTOR OF MAGNETIC MATERIAL MOUNTED FOR HYPOCYCLIC ROTATION RELATIVE TO THE STATOR. THE ROTOR IS CIRCUMFERENTIALLY SLOTTED BY MEANS OF A NUMBER OF UNIFORMLY AXIALLY AND CIRCUMFERENTIALLY SPACED SLOTS, AND ADJACENT FIELD PIECES OF THE STATOR ARE OPPOSITELY POLED FOR THE GENERATION OF AN IMPROVED SEALING POLE EFFECT IN THE ROTOR, WHEREBY DETENT ACTION AND REDUCED ROTOR SLIP ARE OBTAINED.
Inventors
- 👤 Joseph L Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:34
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |