US3175526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic altitude control system for a hydrofoil vessel
Assignee: North American Aviation Corp
•
Filing: 1961-02-27
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Granted: 1965-03-30
•
Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr John M Johnson
- 👤 Olshausen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:03
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285; G; G05; G05D; G05D1/00; G05D1/20; G05D1/24; G05D1/40; G05D1/48; G05D2105/00; G05D2105/20; G05D2105/22; G05D2107/00; G05D2107/25; G05D2107/27; G05D2109/00; G05D2109/30; G05D2109/34; G05D2111/00; G05D2111/50; G05D2111/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN THE AUTOMATIC HEIGHT CONTROL SYSTEM FOR A WATERBORNE VEHICLE HAVING A HULL AND HYDROFOILS, VARIABLE MEANS FOR GENERATING A REFERENCE SIGNAL REPRESENTING A HEIGHT AT WHICH IT IS DESIRED THAT THE VEHICLE TRAVEL ABOVE THE WATER A SEA-STATE DETECTOR FOR PRODUCING A SECOND SIGNAL INDICATIVE OF SEA-STATE, MEANS RESPONSIVE TO SAID SECOND SIGNAL FOR AUTOMATICALLY LIMITING SUCH REFERENCE SIGNAL FOR PREVENTING CONTACT OF THE HULL WITH THE SEAL AND BROACHING OF THE HYDROFOILS, A VERTICAL ACCELEROMETER, AND AUTOMATIC MEANS RESPONSIVE TO SAID ACCELEROMETER FOR REDUCING THE VERTICAL ACCELERATION RESPONSE OF SAID CONTROL SYSTEM TO DEVIATIONS OF VEHICLE HEIGHT FROM SAID REFERENCE HEIGHT.
Claim 2
Dependent Claim
103 words
IN THE AUTOMATIC HEIGHT CONTROL SYSTEM FOR A WATERBORNE VEHICLE HAVING A HULL AND HYDROFOILS, VARIABLE MEANS FOR GENERATING A REFERENCE SIGNAL REPRESENTING A HEIGHT AT WHICH IT IS DESIRED THAT THE VEHICLE TRAVEL ABOVE THE WATER A SEA-STATE DETECTOR FOR PRODUCING A SECOND SIGNAL INDICATIVE OF SEA-STATE, MEANS RESPONSIVE TO SAID SECOND SIGNAL FOR AUTOMATICALLY LIMITING SUCH REFERENCE SIGNAL FOR PREVENTING CONTACT OF THE HULL WITH THE SEAL AND BROACHING OF THE HYDROFOILS, A VERTICAL ACCELEROMETER, AND AUTOMATIC MEANS RESPONSIVE TO SAID ACCELEROMETER FOR REDUCING THE VERTICAL ACCELERATION RESPONSE OF SAID CONTROL SYSTEM TO DEVIATIONS OF VEHICLE HEIGHT FROM SAID REFERENCE HEIGHT.
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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) | 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 |