US3141437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant lift system for craft
Assignee: Individual
•
Filing: 1958-05-23
•
Granted: 1964-07-21
•
Expires: 1978-05-23
Abstract
No abstract record available.
Inventors
- 👤 Bush Vannevar
- 👤 Paul A Scherer
- 👤 Rudolf X Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:19
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A HYDROFOIL SUPPORTED CRAFT COMPRISING AT LEAST ONE FLOTATION ELEMENT, AT LEAST ONE STRUT DEPENDING THEREFROM, AT LEAST ONE HYDROFOIL OF TOTAL SUBMERGENCE DESIGN PIVOTALLY MOUNTED ON SAID STRUT, BALANCING MEANS COMPRISING AT LEAST ONE SPRING HAVING FIRST AND SECOND ENDS, SAID FIRST END ADJUSTABLY FIXED TO SAID CRAFT, A MONOAXIAL CAM FIXED TO SAID SECOND END, FLEXIBLE MEANS INTERCONNECTING THE SURFACE OF SAID CAM WITH SAID HYDROFOIL, THEREBY CONTINUOUSLY APPLYING AN ADJUSTABLE CONSTANT TORQUE TO SAID HYDROFOIL, SAID CONSTANT TORQUE OPERATING ABOUT THE PIVOT IN OPPOSITION TO THE LIFT OF SAID FOIL, THE MOMENT OF SAID FORCE REMAINING EQUAL TO THE MOMENT OF SAID LIFT, THE LIFT OF SAID HYDROFOIL BEING SUBSTANTIALLY CONSTANT IN WATER FLOW WHICH IS VARIABLE RELATIVE TO SAID HYDROFOIL.
Claim 2
Dependent Claim
124 words
A HYDROFOIL SUPPORTED CRAFT COMPRISING AT LEAST ONE FLOTATION ELEMENT, AT LEAST ONE STRUT DEPENDING THEREFROM, AT LEAST ONE HYDROFOIL OF TOTAL SUBMERGENCE DESIGN PIVOTALLY MOUNTED ON SAID STRUT, BALANCING MEANS COMPRISING AT LEAST ONE SPRING HAVING FIRST AND SECOND ENDS, SAID FIRST END ADJUSTABLY FIXED TO SAID CRAFT, A MONOAXIAL CAM FIXED TO SAID SECOND END, FLEXIBLE MEANS INTERCONNECTING THE SURFACE OF SAID CAM WITH SAID HYDROFOIL, THEREBY CONTINUOUSLY APPLYING AN ADJUSTABLE CONSTANT TORQUE TO SAID HYDROFOIL, SAID CONSTANT TORQUE OPERATING ABOUT THE PIVOT IN OPPOSITION TO THE LIFT OF SAID FOIL, THE MOMENT OF SAID FORCE REMAINING EQUAL TO THE MOMENT OF SAID LIFT, THE LIFT OF SAID HYDROFOIL BEING SUBSTANTIALLY CONSTANT IN WATER FLOW WHICH IS VARIABLE RELATIVE TO SAID HYDROFOIL.
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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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |