Patent US3401285A successfully refreshed from Google Patents.
US3401285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reluctance dynamoelectric machines
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1966-04-25
•
Granted: 1968-09-10
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 French Park
- 👤 John T Venaleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:09
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/10; H02K19/103; H02K19/16; H02K19/18; H02K19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A DYNAMOELECTRIC RELUCTANCE MACHINE COMPRISING: A FRAME; A SHAFT ROTATABLY MOUNTED ON THE FRAME; AT LEAST ONE ROTOR ELEMENT SECURED IN CLOSELY SPACED RELATION ALONG SAID SHAFT; A PLURALITY OF STATOR ELEMENTS EXTENDING FROM SAID FRAME IN INTERLEAVED RELATION WITH SAID ROTOR ELEMENTS, A PLURALITY OF COIL MEANS DISPOSED IN EACH OF SAID STATOR ELEMENTS, EACH OF SAID COIL MEANS HAVING A PLURALITY OF MAGNETIC AND NON-MAGNETIC SECTORS CONTAINED THEREIN, AND FIELD MEANS FOR PROVIDING A STATIC MAGNETIC FIELD EXTENDING IN A PARALLEL DIRECTION WITH RESPECT TO SAID SHAFT TO EXCITE SAID MACHINE FOR CONTROL THEREOF.
Claim 2
Dependent Claim
96 words
A DYNAMOELECTRIC RELUCTANCE MACHINE COMPRISING: A FRAME; A SHAFT ROTATABLY MOUNTED ON THE FRAME; AT LEAST ONE ROTOR ELEMENT SECURED IN CLOSELY SPACED RELATION ALONG SAID SHAFT; A PLURALITY OF STATOR ELEMENTS EXTENDING FROM SAID FRAME IN INTERLEAVED RELATION WITH SAID ROTOR ELEMENTS, A PLURALITY OF COIL MEANS DISPOSED IN EACH OF SAID STATOR ELEMENTS, EACH OF SAID COIL MEANS HAVING A PLURALITY OF MAGNETIC AND NON-MAGNETIC SECTORS CONTAINED THEREIN, AND FIELD MEANS FOR PROVIDING A STATIC MAGNETIC FIELD EXTENDING IN A PARALLEL DIRECTION WITH RESPECT TO SAID SHAFT TO EXCITE SAID MACHINE FOR CONTROL THEREOF.
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |