US3280928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.-c. motor control system
Assignee: FRIEDA LIPPS
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Filing: 1965-03-12
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Granted: 1966-10-25
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Herschel H Stilley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:53
CPC Classifications
B; B60; B60K; B60K1/00; B60K1/02; B60L; B60L15/00; B60L15/20; B60L15/2009; B60L15/2036; B60L50/00; B60L50/50; B60L50/51; B60L50/60; B60L50/61; B60L50/62; B60L7/00; B60L7/10; B60L7/14; B60L2210/00; B60L2210/40; B60L2240/00; B60L2240/40; B60L2240/42; B60L2240/421; B60L2240/423; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70; Y02T10/7072; Y02T10/72
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
IN AN ALTERNATING CURRENT SYSTEM FOR DRIVING AND SKID-STEERING A VEHICLE HAVING FIXED DRIVING WHEELS ON THE SIDES THEREOF, THE COMBINATION COMPRISING A SOURCE OF ALTENATING CURRENT, A.-C DRIVING MOTORS COUPLED TO THE RESPECTIVE DRIVING MEANS, EACH OF SAID MOTORS HAVING A FRAME AND A PAIR OF STATORS ARRANGED SIDE BY SIDE THEREIN AND CONNECTED TO THE SOURCE OF ALTERNATING CURRENT TO PRODUCE SEPARATE ROTATING FIELDS, EACH OF SAID MOTORS FURTHER HAVING A ROTOR COOPERATING WITH THE PAIR OF STATORS, THE STATORS COMPRISING A PAIR BOTH BEING MOVABLE WITH RESPECT TO THE FRAME FROM A NULL POSITION TO VARY THE TORQUE OUTPUT CHARACTERISTIC, EACH OF SAID MOTORS HAVING A DIFFERENTIAL LINKAGE THE ENDS OF WHICH ARE CONNECTED TO THE RESPECTIVE STATORS FOR VARYING THE STATOR RELATIVE
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |