Patent US3295488A successfully refreshed from Google Patents.
US3295488A
Expired / Lapsed
US
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Hydraulic rudder control system
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1964-06-22
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Granted: 1967-01-03
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Hinsch Karl
- 👤 Augustin Heinz
- 👤 Heinemann Jorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:43
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206; B; B63; B63H; B63H25/00; B63H25/06; B63H25/08; B63H25/14; B63H25/26; B63H25/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A HYDRAULIC RUDDER CONTROL SYSTEM WHICH COMPRISES: (A) RUDDER ACTUATOR; (B) A PUMP REGULATED TO PUT OUT A CONSTANT PRESSURE AND BEING CONNECTED HYDRAULICALLY DIRECTLY TO SAID RUDDER ACTUATOR, SAID PUMP INCLUDING MEANS FOR ADJUSTING THE CONSTANT PRESSURE WHICH IS PUT OUT BY SAID PUMP; (C) HYDRAULIC-MECHANICAL MEANS MECHANICALLY CONNECTED TO SAID RUDDER ACTUATOR AND TO SAID PRESSURE ADJUSTING MEANS OF SAID PUMP; (D) A CONTINUALLY OPERATING ELECTRO-HYDRAULIC CONTROL VALVE HYDRAULICALLY CONNECTED TO SAID HYDRAULICMECHANICAL MEANS FOR CONTROLLING THE SETTING OF SAID PRESSURE ADJUSTING MEANS OF SAID PUMP AND HENCE FOR CONTROLLING THE FLOW OF PRESSURE FLUID MEDIUM FROM SAID PUMP TO SAID RUDDER ACTUATOR; AND (E) A MOVEMENT-DEPENDENT QUIESCENT-CURRENT REMOTE CONTROL ARRANGEMENT ELECTRICALLY CONNECTED TO SAID CONTROL VALVE, SAID ARRANGEMENT INCLUDING MEANS FOR APPLYING A VIBRATORY FREQUENCY TO SAID CONTROL VALVE, SAID VIBRATORY FREQUENCY ALSO SERVING TO ACTUATE SAID VALVE.
Claim 2
Dependent Claim
141 words
A HYDRAULIC RUDDER CONTROL SYSTEM WHICH COMPRISES: (A) RUDDER ACTUATOR; (B) A PUMP REGULATED TO PUT OUT A CONSTANT PRESSURE AND BEING CONNECTED HYDRAULICALLY DIRECTLY TO SAID RUDDER ACTUATOR, SAID PUMP INCLUDING MEANS FOR ADJUSTING THE CONSTANT PRESSURE WHICH IS PUT OUT BY SAID PUMP; (C) HYDRAULIC-MECHANICAL MEANS MECHANICALLY CONNECTED TO SAID RUDDER ACTUATOR AND TO SAID PRESSURE ADJUSTING MEANS OF SAID PUMP; (D) A CONTINUALLY OPERATING ELECTRO-HYDRAULIC CONTROL VALVE HYDRAULICALLY CONNECTED TO SAID HYDRAULICMECHANICAL MEANS FOR CONTROLLING THE SETTING OF SAID PRESSURE ADJUSTING MEANS OF SAID PUMP AND HENCE FOR CONTROLLING THE FLOW OF PRESSURE FLUID MEDIUM FROM SAID PUMP TO SAID RUDDER ACTUATOR; AND (E) A MOVEMENT-DEPENDENT QUIESCENT-CURRENT REMOTE CONTROL ARRANGEMENT ELECTRICALLY CONNECTED TO SAID CONTROL VALVE, SAID ARRANGEMENT INCLUDING MEANS FOR APPLYING A VIBRATORY FREQUENCY TO SAID CONTROL VALVE, SAID VIBRATORY FREQUENCY ALSO SERVING TO ACTUATE SAID VALVE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |