US3286109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step motor damped by a viscous fluid filling
Assignee: Superior Electric Co
•
Filing: 1964-02-17
•
Granted: 1966-11-15
•
Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:41
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; H02K37/14; H02K37/18; F; F16; F16F; F16F15/00; F16F15/10; H02K37/22; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1257
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN ELECTRIC MOTOR OF THE INCREMENTAL ROTATIONAL STEPPING TYPE COMPRISING A STATOR ASSEMBLY HAVING AN INNER PERIPHERY SUBSTANTIALLY DEFINING A CYLINDER, A ROTOR ASSEMBLY INCLUDING A SHAFT AND AT LEAST ONE RADIALLY EXTENDING MEMBER HAVING A SUBSTANTIALLY CYLINDRICAL OUTER PERIPHERY FORMED WITH ROTOR TEETH, AND MEANS MOUNTING THE ROTOR ASSEMBLY TO HAVE THE PERIPHERY OF THE MEMBER RADIALLY ALIGNED WITH THE INNER PERIPHERY OF THE STATOR WITH A SMALL GAP EXISTING THEREBETWEEN, SAID MEANS INCLUDING A FRAME DEFINING A FLUID-TIGHT CHAMBER IN WHICH THE STATOR AND ROTOR PERIPHERIES ARE LOCATED, AND A QUANTITY OF VISCOUS DAMPENING FLUID WITHIN SAID CHAMBER AT LEAST AT THE GAP, SAID FLUID HAVING A VISCOSITY WHICH DAMPENS THE OSCILLATIONS OCCURRING IN THE ROTOR ASSEMBLY WHEN SAID SHAFT IS STOPPED AT THE END OF A STEP.
Claim 2
Dependent Claim
130 words
AN ELECTRIC MOTOR OF THE INCREMENTAL ROTATIONAL STEPPING TYPE COMPRISING A STATOR ASSEMBLY HAVING AN INNER PERIPHERY SUBSTANTIALLY DEFINING A CYLINDER, A ROTOR ASSEMBLY INCLUDING A SHAFT AND AT LEAST ONE RADIALLY EXTENDING MEMBER HAVING A SUBSTANTIALLY CYLINDRICAL OUTER PERIPHERY FORMED WITH ROTOR TEETH, AND MEANS MOUNTING THE ROTOR ASSEMBLY TO HAVE THE PERIPHERY OF THE MEMBER RADIALLY ALIGNED WITH THE INNER PERIPHERY OF THE STATOR WITH A SMALL GAP EXISTING THEREBETWEEN, SAID MEANS INCLUDING A FRAME DEFINING A FLUID-TIGHT CHAMBER IN WHICH THE STATOR AND ROTOR PERIPHERIES ARE LOCATED, AND A QUANTITY OF VISCOUS DAMPENING FLUID WITHIN SAID CHAMBER AT LEAST AT THE GAP, SAID FLUID HAVING A VISCOSITY WHICH DAMPENS THE OSCILLATIONS OCCURRING IN THE ROTOR ASSEMBLY WHEN SAID SHAFT IS STOPPED AT THE END OF A STEP.
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |