US3109495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base ventilated hydrofoil
Assignee: Individual
•
Filing: 1962-12-18
•
Granted: 1963-11-05
•
Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Laug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/248; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/28; B63H2001/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VEHICLE PROPELLER ADAPTED TO OPERATE COMPLETELY SUBMERGED AND FULLY WETTED IN WATER HAVING A ROTATABLE HUB AND A PLURALITY OF ANGULARLY SPACED BLADES EXTENDING OUTWARDLY THEREFROM, EACH BLADE HAVING LEADING AND TRAILING EDGES, THE TRAILING EDGE OF EACH BLADE FORMING A BASE SURFACE OF SUBSTANTIAL THICKNESS WITH RESPECT TO THE LEADING EDGE THICKNESS, SAID HUB HAVING A CIRCULAR CROSS SECTION AT ITS REAR END, AND MEANS FOR EXHAUSTING GAS AXIALLY REARWARDLY THROUGH SAID HUB INTO AMBIENT WATER IN SUFFICIENT QUANTITY TO FULLY VENTILATE THE REGION BEHIND SAID HUB AND THE REGIONS BEHIND THE BLADE BASE SURFACES TO MINIMIZE PRESSURE DRAG, IN ACCORDANCE WITH THE RELATIONSHIP:
Claim 2
Dependent Claim
106 words
A VEHICLE PROPELLER ADAPTED TO OPERATE COMPLETELY SUBMERGED AND FULLY WETTED IN WATER HAVING A ROTATABLE HUB AND A PLURALITY OF ANGULARLY SPACED BLADES EXTENDING OUTWARDLY THEREFROM, EACH BLADE HAVING LEADING AND TRAILING EDGES, THE TRAILING EDGE OF EACH BLADE FORMING A BASE SURFACE OF SUBSTANTIAL THICKNESS WITH RESPECT TO THE LEADING EDGE THICKNESS, SAID HUB HAVING A CIRCULAR CROSS SECTION AT ITS REAR END, AND MEANS FOR EXHAUSTING GAS AXIALLY REARWARDLY THROUGH SAID HUB INTO AMBIENT WATER IN SUFFICIENT QUANTITY TO FULLY VENTILATE THE REGION BEHIND SAID HUB AND THE REGIONS BEHIND THE BLADE BASE SURFACES TO MINIMIZE PRESSURE DRAG, IN ACCORDANCE WITH THE RELATIONSHIP:
References Cited (Backward Citations)
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Cited
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Cited
US2269030A
Cited
US2213612A
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US2213609A
Cited
US2608171A
Cited
US2969759A
Cited
US3077173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |