Patent US3175585A successfully refreshed from Google Patents.
US3175585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-electric servo control mechanisms
Assignee: Individual
•
Filing: 1961-03-15
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Granted: 1965-03-30
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Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 Faisandier Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:31
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; F15B13/0406; F15B13/044; F15B13/0442; F15B9/00; F15B9/02; F15B9/08; F15B9/09; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/86638
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A HYDRO-ELECTRIC SERVO CONTROL MECHANISM OF THE TYPE IN WHICH THE FINAL POSITION OF A HYDRAULIC DEVICE IS DEFINED BY AN INPUT VOLTAGE, THE OUTPUT MOVEMENT OF THE HYDRAULIC DEVICE DERIVING AN OUTPUT VOLTAGE PROVIDING A FEEDBACK VOLTAGE, THE COMBINATION COMPRISING A VALVE DISTRIBUTOR FOR EFFECTING MOVEMENT OF THE HYDRAULIC DEVICE AND INCLUDING A ROTARY VALVE MEMBER, A TORQUE KOTOR HAVING A ROTOR AND NORMALLY RESPONSIVE TO COMBINED INPUT AND FEEDBACK VOLTAGES FOR MOVING THE VALVE DISTRIBUTOR, A MAGNETO-ELECTRIC GENERATOR HAVING A ROTOR, A SHAFT, SAID ROTARY VALVE MEMBER AND SAID ROTORS BEING MOUNTED ON SAID SHAFT AND MEANS TO COMBINE THE INPUT VOLTAGE, THE FEEDBACK VOLTAGE, AND THE OUTPUT VOLTAGE OF SAID GENERATOR, SAID TORQUE MOTOR BEING ELECTRICALLY CONNECTED TO BE CONTROLLED BY THE COMBINED INPUT AND FEEDBACK VOLTAGES AND THE OUTPUT VOLTAGE OF SAID GENERATOR.
Claim 2
Dependent Claim
138 words
IN A HYDRO-ELECTRIC SERVO CONTROL MECHANISM OF THE TYPE IN WHICH THE FINAL POSITION OF A HYDRAULIC DEVICE IS DEFINED BY AN INPUT VOLTAGE, THE OUTPUT MOVEMENT OF THE HYDRAULIC DEVICE DERIVING AN OUTPUT VOLTAGE PROVIDING A FEEDBACK VOLTAGE, THE COMBINATION COMPRISING A VALVE DISTRIBUTOR FOR EFFECTING MOVEMENT OF THE HYDRAULIC DEVICE AND INCLUDING A ROTARY VALVE MEMBER, A TORQUE KOTOR HAVING A ROTOR AND NORMALLY RESPONSIVE TO COMBINED INPUT AND FEEDBACK VOLTAGES FOR MOVING THE VALVE DISTRIBUTOR, A MAGNETO-ELECTRIC GENERATOR HAVING A ROTOR, A SHAFT, SAID ROTARY VALVE MEMBER AND SAID ROTORS BEING MOUNTED ON SAID SHAFT AND MEANS TO COMBINE THE INPUT VOLTAGE, THE FEEDBACK VOLTAGE, AND THE OUTPUT VOLTAGE OF SAID GENERATOR, SAID TORQUE MOTOR BEING ELECTRICALLY CONNECTED TO BE CONTROLLED BY THE COMBINED INPUT AND FEEDBACK VOLTAGES AND THE OUTPUT VOLTAGE OF SAID GENERATOR.
References Cited (Backward Citations)
US3016883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |