Patent US3580203A successfully refreshed from Google Patents.
US3580203A
Expired / Lapsed
US
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Sailboat
Assignee: Individual
•
Filing: 1968-11-05
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Granted: 1971-05-25
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Expires: 1988-11-05
Abstract
Abstract A sailboat including hull having a mast mounted for full 360* rotation thereon and forming the central portion of a sail having the configuration of an air foil and arranged to collapse together with means for adjusting the sail position, the sail being supported so that its aerodynamic center is closely adjacent its axis of rotation and cooperatively arranged with a rotatable centerboard to achieve optimum utilization of the propulsive forces of a wind.
Inventors
- 👤 Benjamin P Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/061
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
74 words
A sailboat which comprises a hull, and a sail including a mast mounted on said hull and projecting upwardly therefrom, and having lateral sides arranged to form the opposite sides of the central portion of an airfoil, means mounted on the forward side of said mast to form the leading edge portion of the airfoil, and means mounted on the rearward side of the mast to form the trailing edge portion of the airfoil.
Claim 2
Dependent Claim
74 words
A sailboat which comprises a hull, and a sail including a mast mounted on said hull and projecting upwardly therefrom, and having lateral sides arranged to form the opposite sides of the central portion of an airfoil, means mounted on the forward side of said mast to form the leading edge portion of the airfoil, and means mounted on the rearward side of the mast to form the trailing edge portion of the airfoil.
Claim 3
Dependent Claim
24 words
A sailboat according to claim 1 which comprises a centerboard rotatably mounted below said hull at a position slightly aft of its hydrodynamic center.
Claim 4
Dependent Claim
20 words
A sailboat according to claim 2 which comprises means for resiliently maintaining said centerboard in longitudinal alignment with said hull.
Claim 5
Dependent Claim
16 words
A sailboat according to claim 1 wherein said mast has a generally open rectanguLar cross section.
Claim 6
Dependent Claim
24 words
A sailboat according to claim 1 wherein said means forming said leading edge portion forms a hollow liquid impervious chamber of a buoyant nature.
Claim 7
Dependent Claim
18 words
A sailboat according to claim 1 wherein said mast forms a liquid impervious chamber of a buoyant nature.
Claim 8
Dependent Claim
23 words
A sailboat according to claim 1 wherein said means forming the trailing edge portion of the airfoil is removably attached to said mast.
Claim 9
Dependent Claim
22 words
A sailboat according to claim 1 wherein said means forming the trailing edge portion of the airfoil is collapsible on said mast.
Claim 10
Dependent Claim
52 words
A sailboat according to claim 1 wherein said means forming the trailing edge portion of the airfoil includes a plurality of ribs slidably and rotatably joined to said mast and sail skin secured to the rib perimeters to form a substantially rigid but collapsible extension of the lateral sides of said mast.
Claim 11
Dependent Claim
45 words
A sailboat according to claim 9 wherein said means forming the trailing edge portion includes a pair of releasable braces connected between said mast and the uppermost and lowermost ribs to hold said ribs in substantially perpendicular relation to the longitudinal axis of said mast.
Claim 12
Dependent Claim
18 words
A sailboat according to claim 1 which comprises means mounting said mast on said hull for 360* rotation.
Claim 13
Dependent Claim
17 words
A sailboat according to claim 11 which comprises manually operable means for rotating said mast mounting means.
Claim 14
Dependent Claim
15 words
A sailboat according to claim 11 which comprises means resiliently retarding rotation of said mast.
Claim 15
Dependent Claim
69 words
A sail which comprises a mast adapted for mounting on a hull to project upwardly therefrom and having lateral sides arranged to form the opposite sides of the central portion of an airfoil, means mounted on the forward side of said mast to form the leading edge of the airfoil, and means mounted on the rearward side of the mast to form the trailing edge portion of the airfoil.
Claim 16
Dependent Claim
69 words
A sail which comprises a mast adapted for mounting on a hull to project upwardly therefrom and having lateral sides arranged to form the opposite sides of the central portion of an airfoil, means mounted on the forward side of said mast to form the leading edge of the airfoil, and means mounted on the rearward side of the mast to form the trailing edge portion of the airfoil.
Claim 17
Dependent Claim
15 words
A sail according to claim 14 wherein at least one of said means is collapsible.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |