Patent US4827161A successfully refreshed from Google Patents.
US3223382A
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Hydraulic control system
Assignee: MERCIER OLAER PATENT CORP
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Filing: 1964-04-20
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Granted: 1965-12-14
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Mercier Jean
- 👤 Mercier Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:38
CPC Classifications
F; F15; F15B; F15B20/00; F15B20/004; B; B63; B63H; B63H25/00; B63H25/06; B63H25/08; B63H25/14; B63H25/26; B63H25/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A HYDRAULIC CONTROL SYSTEM FOR EFFECTING ROTARY MOVEMENT OF A SHAFT ON EACH SIDE OF A NEUTRAL POSITION, COMPRISING A HYDRAULIC MOTOR OPERATIVELY CONNECTED TO SAID SHAFT TO ROTATE THE LATTER, SAID MOTOR HAVING CONTROL PORTS, A VALVE HAVING CONTROL PORTS CONNECTED TO THE CONTROL PORTS OF SAID MOTOR, SAID VALVE HAVING A FLUID PRESSURE INLET PORT AND A RETURN PORT, A SOURCE OF FLUID UNDER PRESSURE CONNECTED TO SAID PRESSURE INLET PORT AND ADAPTED TO PROVIDE A CONSTANT SOURCE OF PRESSURE THERETO, A RESERVOIR CONNECTED TO SAID RETURN PORT, A SECOND SOURCE OF FLUID UNDER PRESSURE ADAPTED TO SUPPLY FLUID UNDER PRESSURE ONLY WHEN ACTUATED, SAID VLVE HAVING A VALVE MEMBER, RESILIENT MEANS REACTING AGAINST SAID VALVE MEMBER NORMALLY RETAINING THE LATTER IN NEUTRAL POSITION TO BLOCK SAID CONTROL PORTS AND SAID INLET AND RETURN PORTS AND MEANS OPERATIVELY CONNECTING SAID SECOND SOURCE TO SAID VALVE TO EFFECT MOVEMENT OF SAID VALVE MEMBER TO OPERATIVE POSITION UPON ACTUATION OF SAID SECOND SOURCE THEREBY TO CONNECT SAID CONTROL PORTS TO SAID INLET PORT AND SAID RETURN PORT OT ACTUATE SAID HYDRAULIC MOTOR.
Claim 2
Dependent Claim
182 words
A HYDRAULIC CONTROL SYSTEM FOR EFFECTING ROTARY MOVEMENT OF A SHAFT ON EACH SIDE OF A NEUTRAL POSITION, COMPRISING A HYDRAULIC MOTOR OPERATIVELY CONNECTED TO SAID SHAFT TO ROTATE THE LATTER, SAID MOTOR HAVING CONTROL PORTS, A VALVE HAVING CONTROL PORTS CONNECTED TO THE CONTROL PORTS OF SAID MOTOR, SAID VALVE HAVING A FLUID PRESSURE INLET PORT AND A RETURN PORT, A SOURCE OF FLUID UNDER PRESSURE CONNECTED TO SAID PRESSURE INLET PORT AND ADAPTED TO PROVIDE A CONSTANT SOURCE OF PRESSURE THERETO, A RESERVOIR CONNECTED TO SAID RETURN PORT, A SECOND SOURCE OF FLUID UNDER PRESSURE ADAPTED TO SUPPLY FLUID UNDER PRESSURE ONLY WHEN ACTUATED, SAID VLVE HAVING A VALVE MEMBER, RESILIENT MEANS REACTING AGAINST SAID VALVE MEMBER NORMALLY RETAINING THE LATTER IN NEUTRAL POSITION TO BLOCK SAID CONTROL PORTS AND SAID INLET AND RETURN PORTS AND MEANS OPERATIVELY CONNECTING SAID SECOND SOURCE TO SAID VALVE TO EFFECT MOVEMENT OF SAID VALVE MEMBER TO OPERATIVE POSITION UPON ACTUATION OF SAID SECOND SOURCE THEREBY TO CONNECT SAID CONTROL PORTS TO SAID INLET PORT AND SAID RETURN PORT OT ACTUATE SAID HYDRAULIC MOTOR.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |