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Patent US3656444A successfully refreshed from Google Patents.
US3656444A
Expired / Lapsed
US
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Sailboat rigging
Assignee: Individual
•
Filing: 1970-06-03
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Granted: 1972-04-18
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Expires: 1990-06-03
Abstract
Abstract A sailboat in which a vertical mast is pivotally mounted upon the hull for free swinging movement about a vertical axis of rotation located aft of the mast and toward the center of the sailboat to maintain the distance between the center of effort of the sail and the axis of rotation small and to maintain the horizontal distance between the center of effort and the center of the sailboat small and relatively unchanged regardless of the orientation of the sail. In a gaff-rigged sailboat, the boom and the gaff are fixed against rotation upon the mast so that the mast is subjected to torsion between the boom and the gaff and resiliently biases the gaff and the boom into a common plane.
Inventors
- 👤 Kenneth E Kratz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:21
CPC Classifications
B; B63; B63B; B63B15/00; B63B15/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
In a sailing boat having a hull and a sail supported on the hull by a mast and a boom, the boom having opposite ends and being coupled to the mast adjacent one of the opposite ends such that the mast and the boom lie in a common plane; means precluding movement of the boom relative to the mast in directions transverse to the common plane; and means mounting the mast upon the hull for free rotation about an axis located between the mast and the center of effort of the sail, said axis being generally parAllel to and spaced laterally from the mast in the direction extending from the mast toward the other of the opposite ends of the boom.
Claim 2
Dependent Claim
121 words
In a sailing boat having a hull and a sail supported on the hull by a mast and a boom, the boom having opposite ends and being coupled to the mast adjacent one of the opposite ends such that the mast and the boom lie in a common plane; means precluding movement of the boom relative to the mast in directions transverse to the common plane; and means mounting the mast upon the hull for free rotation about an axis located between the mast and the center of effort of the sail, said axis being generally parAllel to and spaced laterally from the mast in the direction extending from the mast toward the other of the opposite ends of the boom.
Claim 3
Dependent Claim
15 words
The invention of claim 1 wherein the axis of rotation is in the common plane.
Claim 4
Dependent Claim
21 words
The invention of claim 2 wherein the axis of rotation is closer to the center of effort than to the mast.
Claim 5
Dependent Claim
21 words
The invention of claim 3 including means permitting pivotal movement of the boom relative to the mast within the common plane.
Claim 6
Dependent Claim
73 words
The invention of claim 1 including: a gaff; means for affixing the gaff to the mast at a location spaced from the boom; and means for precluding movement of the gaff relative to the mast in directions transverse to the plane of the gaff and the mast at said location such that transverse movement of the gaff relative to the boom results in torsion of the mast between the boom and the gaff.
Claim 7
Dependent Claim
18 words
The invention of claim 5 wherein the plane of the gaff and the mast is said common plane.
Claim 8
Dependent Claim
101 words
The invention of claim 1 wherein: the mast is vertical; the boom is generally horizontal; the common plane is a vertical plane; the means mounting the mast upon the hull includes a horizontal beam having opposite ends, one of said ends being affixed to the mast, and means journaling the other of said ends upon the hull for rotation of the beam about a vertical axis adjacent the center of the sailboat and between the mast and the center of effort of the sail; and means coupling the boom to the mast such that the boom extends through the vertical axis.
Claim 9
Dependent Claim
41 words
The invention of claim 7 wherein said coupling means includes a pivot which permits pivotal movement of the boom relative to the mast in the vertical plane while precluding pivotal movement of the boom relative to the mast in horizontal planes.
Claim 10
Dependent Claim
18 words
The invention of claim 8 wherein said pivot includes a pivot pin extending perpendicular to said vertical plane.
Claim 11
Dependent Claim
118 words
The invention of claim 7 including: a gaff; and a pivot coupling the gaff to the mast at a location above the boom such that the gaff and the boom lie in the same vertical plane, said pivot permitting pivotal movement of the gaff relative to the mast in the vertical plane while precluding pivotal movement of the gaff relative to the mast at said location in horizontal planes such that horizontal movement of the gaff relative to the boom results in torsion of the mast between the boom and the gaff; said mast, by virtue of said torsion, permitting horizontal movement of the gaff relative to the boom while resiliently biasing the gaff into said vertical plane.
Claim 12
Dependent Claim
25 words
The invention of claim 10 including means for selectively uncoupling the pivot which couples the gaff to the mast at said location above the boom.
Claim 13
Dependent Claim
143 words
In a sailing boat having a hull and a sail supported on the hull by a mast and a boom, the boom being coupled to the mast such that the mast and the boom lie in a common plane: means precluding movement of the boom relative to the mast in directions transverse to the common plane; means mounting the mast upon the hull for rotation about an axis extending in the same direction as the mast; a gaff; means for affixing the gaff to the mast at a location spaced from the boom; and means for precluding movement of the gaff relative to the mast in directions transverse to the plane of the gaff and the mast at said location such that transverse movement of the gaff relative to the boom results in torsion of the mast between the boom and the gaff.
Claim 14
Dependent Claim
143 words
In a sailing boat having a hull and a sail supported on the hull by a mast and a boom, the boom being coupled to the mast such that the mast and the boom lie in a common plane: means precluding movement of the boom relative to the mast in directions transverse to the common plane; means mounting the mast upon the hull for rotation about an axis extending in the same direction as the mast; a gaff; means for affixing the gaff to the mast at a location spaced from the boom; and means for precluding movement of the gaff relative to the mast in directions transverse to the plane of the gaff and the mast at said location such that transverse movement of the gaff relative to the boom results in torsion of the mast between the boom and the gaff.
Claim 15
Dependent Claim
18 words
The invention of claim 12 wherein the plane of the gaff and the mast is said common plane.
Claim 16
Dependent Claim
159 words
The invention of claim 12 including: a first pivot coupling the boom to the mast; said first pivot permitting pivotal movement of the boom relative to the mast in the vertical plane while precluding pivotal movement of the boom relative to the mast in horizontal planes; and a second pivot coupling the gaff to the mast at a location above the boom such that the gafF and the boom lie in the same vertical plane, said second pivot permitting pivotal movement of the gaff relative to the mast and the vertical plane while precluding pivotal movement of the gaff relative to the mast at said location in horizontal planes, such that horizontal movement of the gaff relative to the boom results in torsion of the mast between the boom and the gaff; said mast, by virtue of said torsion, permitting limited horizontal movement of the gaff relative to the boom while resiliently biasing the gaff into said vertical plane.
Claim 17
Dependent Claim
13 words
The invention of claim 14 including means for selectively uncoupling the second pivot.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |