Patent EP0286306A1 successfully refreshed from Google Patents.
US3564362A
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US
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Electric drive unit utilizing an m-g set as another drive unit when a certain speed is attained
Assignee: ZF International UK Ltd
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Filing: 1968-08-06
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Granted: 1971-02-16
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Expires: 1988-08-06
Abstract
Abstract AN ELECTRIC DRIVE UNIT COMPRISING A MOTOR CONNECTIBLE TO A SOUCE OF D.C. SUPPLY, THE MOTOR DRIVING A GENERATOR WHICH IN TURN SUPPLIES ELECTRIC CURRENT TO A MOTOR FROM WHICH THE OUTPUT OF THE SYSTEM IS OBTAINED, MEANS BEING PROVIDED TO CONTROL THE EXCITATION OF THE GENERATOR AND CLUTCH MEANS BEING PROVIDED TO EFFECT CONNECTION BETWEEN THE SHAFTS OF THE MOTORS AND THE GENERATOR AND SWITCH MEANS BEING PROVIDED TO CONNECT THE GENERATOR AND MOTORS ACROSS THE SOURCE OF D.C. SUPPLY.
Inventors
- 👤 William Frank Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:11
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/68; H02P5/69; B; B60; B60L; B60L50/00; B60L50/50; B60L50/52; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |