US3343512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil with unsymmetrical nose profile
Assignee: Individual
•
Filing: 1966-05-20
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Granted: 1967-09-26
•
Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Francis R Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:30
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/248; Y; Y10; Y10S; Y10S416/00; Y10S416/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A HYDRODYNAMIC BODY HAVING UPPER AND LOWER SURFACE PORTIONS WHICH LIE ABOVE AND BELOW A REFERENCE LINE AND WHICH EXTEND FROM A NOSE PORTION AT THE LEADING EDGE OF SAID BODY AND TERMINATE AT THE TRAILING EDGE OF SAID BODY, WHEREIN THE IMPROVEMENT COMPRISES: A CURVED NOSE FOR SAID BODY WHEREIN THE PORTION OF SAID NOSE ABOVE SAID REFERENCE LINE HAS A RADIUS OF CURVATURE SUBSTANTIALLY LARGER THAN THE RADIUS OF CURVATURE FOR THE PORTION BELOW SAID REFERENCE LINE, SAID IMPROVEMENT AFFORDING A HYDRODYNAMIC BODY WHICH MAY BE OPERATED AT GREATER SPEEDS WITHOUT CAVITATION AND WITH MORE EFFECTIVE LIFT AND ONE HAVING WIDER RANGES OF OPERATING LIMITS AND IMPROVED LIFT TO DRAG RATIOS AND PENETRABILITY CHARACTERISTICS.
Claim 2
Dependent Claim
116 words
A HYDRODYNAMIC BODY HAVING UPPER AND LOWER SURFACE PORTIONS WHICH LIE ABOVE AND BELOW A REFERENCE LINE AND WHICH EXTEND FROM A NOSE PORTION AT THE LEADING EDGE OF SAID BODY AND TERMINATE AT THE TRAILING EDGE OF SAID BODY, WHEREIN THE IMPROVEMENT COMPRISES: A CURVED NOSE FOR SAID BODY WHEREIN THE PORTION OF SAID NOSE ABOVE SAID REFERENCE LINE HAS A RADIUS OF CURVATURE SUBSTANTIALLY LARGER THAN THE RADIUS OF CURVATURE FOR THE PORTION BELOW SAID REFERENCE LINE, SAID IMPROVEMENT AFFORDING A HYDRODYNAMIC BODY WHICH MAY BE OPERATED AT GREATER SPEEDS WITHOUT CAVITATION AND WITH MORE EFFECTIVE LIFT AND ONE HAVING WIDER RANGES OF OPERATING LIMITS AND IMPROVED LIFT TO DRAG RATIOS AND PENETRABILITY CHARACTERISTICS.
References Cited (Backward Citations)
US1976046A
Cited
US3109495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |