US3130702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil control system
Assignee: MELCHIOR INTERNATIONAL CORP
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Filing: 1962-06-12
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Granted: 1964-04-28
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Fischer Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:31
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A HYDROFOIL SYSTEM COMPRISING A HYDROFOIL, SAID HYDROFOIL HAVING A SURFACE DEFLECTIVELY MOUNTED TO CONTROL THE LIFT CHARACTERISTICS OF THE HYDROFOIL, A SERVO SYSTEM RESPONSIVE TO AN INPUT SIGNAL TO CONTROL THE DEFLECTION OF SAID DEFLECTIBLE SURFACE, A PRESSURE SENSOR TO GENERATE A FIRST ELECTRICAL SIGNAL IN RESPONSE TO MEASURED BAROMETRIC PRESSURE, A BAND PASS FILTER COUPLED TO SAID SENSOR TO REJECT LOW FREQUENCIES IN SAID FIRST SIGNAL, A HEIGHT SENSOR TO GENERATE A SECOND ELECTRICAL SIGNAL IN RESPONSE TO MEASUREMENT OF THE INSTANTANEOUS HEIGHT OF THE VESSEL OVER THE SURFACE OF THE WATER, A LOW PASS FILTER COUPLED TO SAID HEIGHT SENSOR TO REJECT HIGH FREQUENCIES IN SAID SECOND SIGNAL, MEANS COUPLED TO SAID BAND PASS FILTER AND SAID LOW PASS FILTER TO LINEARLY ADD THE FILTERED FIRST AND SECOND ELECTRICAL SIGNALS AND TO GENERATE SAID INPUT SIGNAL RESPONSIVE TO SAID ADDITION, AND MEANS TO COUPLE SAID INPUT SIGNAL TO SAID SERVO SYSTEM.
Claim 2
Dependent Claim
154 words
A HYDROFOIL SYSTEM COMPRISING A HYDROFOIL, SAID HYDROFOIL HAVING A SURFACE DEFLECTIVELY MOUNTED TO CONTROL THE LIFT CHARACTERISTICS OF THE HYDROFOIL, A SERVO SYSTEM RESPONSIVE TO AN INPUT SIGNAL TO CONTROL THE DEFLECTION OF SAID DEFLECTIBLE SURFACE, A PRESSURE SENSOR TO GENERATE A FIRST ELECTRICAL SIGNAL IN RESPONSE TO MEASURED BAROMETRIC PRESSURE, A BAND PASS FILTER COUPLED TO SAID SENSOR TO REJECT LOW FREQUENCIES IN SAID FIRST SIGNAL, A HEIGHT SENSOR TO GENERATE A SECOND ELECTRICAL SIGNAL IN RESPONSE TO MEASUREMENT OF THE INSTANTANEOUS HEIGHT OF THE VESSEL OVER THE SURFACE OF THE WATER, A LOW PASS FILTER COUPLED TO SAID HEIGHT SENSOR TO REJECT HIGH FREQUENCIES IN SAID SECOND SIGNAL, MEANS COUPLED TO SAID BAND PASS FILTER AND SAID LOW PASS FILTER TO LINEARLY ADD THE FILTERED FIRST AND SECOND ELECTRICAL SIGNALS AND TO GENERATE SAID INPUT SIGNAL RESPONSIVE TO SAID ADDITION, AND MEANS TO COUPLE SAID INPUT SIGNAL TO SAID SERVO SYSTEM.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |