US3333413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-hydraulic control system
Assignee: Individual
•
Filing: 1966-12-28
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Granted: 1967-08-01
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Mercier Jean
- 👤 Mercier Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:09
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63H25/08; B63H25/14; B63H25/26; B63H25/28; F; F15; F15B; F15B21/00; F15B21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A HYDRAULIC CONTROL SYSTEM FOR EFFECTING ROTARY MOVEMENT OF A SHAFT ON EACH SIDE OF A NEUTRAL POSITION, COMPRISING A PAIR OF HYDRAULIC ACTUATING MEANS EACH OPERATIVELY CONNECTED TO SAID SHAFT TO ROTATE THE LATTER, FLUID RESERVOIR MEANS HAVING THREE FLUID STORAGE REGIONS, THREE MOTOR ACTUATED SOURCES OF FLUID UNDER PRESSURE, EACH HAVING AN INLET CONNECTED TO AN ASSOCIATED FLUID STORAGE REGION AND AN OUTLET, THE OUTLETS OF TWO OF SAID SOURCES BEING CONNECTED RESPECTIVELY TO AN ASSOCIATED HYDRAULIC ACTUATING MEANS, THE OUTLET OF THE THIRD SOURCE BEING CONNECED TO THE OUTLETS OF EACH OF SID FIRST TWO SOURCES, EACH OF SAID ACTUATING MEANS HAVING A FLUID RETURN PORT CONNECTED RESPECTIVELY TO AN ASSOCIATED FLUID STORAGE REGION, MEANS TO PROVIDE A MINIMUM LEVEL OF FLUID IN EACH OF SAID LAST TWO FLUID STORAGE REGIONS AND TO FEED SAID THIRD FLUID STORAGE REGION WITH FLUID FROM SAID LAST TWO FLUID STORAGE REGIONS ABOVE SUCH MINIMUM LEVEL, VALVE MEANS CONTROLLING FLOW OF FLUID FROM SAID FIRST TWO SOURCES TO THE ASSOCIATED HYDRAULIC ACTUATING MEANS, AND MEANS TO ACTUATE SAID VALVE MEANS.
Claim 2
Dependent Claim
179 words
A HYDRAULIC CONTROL SYSTEM FOR EFFECTING ROTARY MOVEMENT OF A SHAFT ON EACH SIDE OF A NEUTRAL POSITION, COMPRISING A PAIR OF HYDRAULIC ACTUATING MEANS EACH OPERATIVELY CONNECTED TO SAID SHAFT TO ROTATE THE LATTER, FLUID RESERVOIR MEANS HAVING THREE FLUID STORAGE REGIONS, THREE MOTOR ACTUATED SOURCES OF FLUID UNDER PRESSURE, EACH HAVING AN INLET CONNECTED TO AN ASSOCIATED FLUID STORAGE REGION AND AN OUTLET, THE OUTLETS OF TWO OF SAID SOURCES BEING CONNECTED RESPECTIVELY TO AN ASSOCIATED HYDRAULIC ACTUATING MEANS, THE OUTLET OF THE THIRD SOURCE BEING CONNECED TO THE OUTLETS OF EACH OF SID FIRST TWO SOURCES, EACH OF SAID ACTUATING MEANS HAVING A FLUID RETURN PORT CONNECTED RESPECTIVELY TO AN ASSOCIATED FLUID STORAGE REGION, MEANS TO PROVIDE A MINIMUM LEVEL OF FLUID IN EACH OF SAID LAST TWO FLUID STORAGE REGIONS AND TO FEED SAID THIRD FLUID STORAGE REGION WITH FLUID FROM SAID LAST TWO FLUID STORAGE REGIONS ABOVE SUCH MINIMUM LEVEL, VALVE MEANS CONTROLLING FLOW OF FLUID FROM SAID FIRST TWO SOURCES TO THE ASSOCIATED HYDRAULIC ACTUATING MEANS, AND MEANS TO ACTUATE SAID VALVE MEANS.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |