US4677928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular linked rotating foil assembly for vessels
Assignee: Individual
•
Filing: 1986-03-28
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Granted: 1987-07-07
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Expires: 2006-03-28
Abstract
Abstract A sailing craft has a circular linked rotating structure mounted on a vertical support or mast and within the circular structure are a plurality of parallel thin foils. The entire circular structure may be rotated in two axes to achieve directional control of the sailing craft as well as to adjust the angle of the foils to the wind.
Inventors
- 👤 John G. Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:08
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/061; B63H9/0621; B63H9/0628
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A sailing craft having an upright support received for rotation in said craft, a circular structure having an inner surface, a diametrical support extending across the structure and between the inner surface of the circular structure, means connecting the diametral support to said support for rotative movement, a plurality of parallel foils fixedly mounted within said structure between the diametral support and the inner surface of said circular structure, said circular structure providing end plate effect for said foils, control means for controlling the rotative movement of the diametral support and for controlling the rotative position of the upright support.
Claim 2
Dependent Claim
100 words
A sailing craft having an upright support received for rotation in said craft, a circular structure having an inner surface, a diametrical support extending across the structure and between the inner surface of the circular structure, means connecting the diametral support to said support for rotative movement, a plurality of parallel foils fixedly mounted within said structure between the diametral support and the inner surface of said circular structure, said circular structure providing end plate effect for said foils, control means for controlling the rotative movement of the diametral support and for controlling the rotative position of the upright support.
Claim 3
Dependent Claim
24 words
A sailing craft as in claim 1 wherein said plurality of foils are of stiff material to impart structural stiffness to the circular structure.
Claim 4
Dependent Claim
25 words
A sailing craft as in claim 1 wherein the circular structure is an airfoil and has a flat inner surface and a curved outer surface.
Claim 5
Dependent Claim
18 words
A sailing craft as in claim 1 wherein the circular structure is a pair of spaced circular rims.
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) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |