US3762353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed sailboat
Assignee: Individual
•
Filing: 1971-09-09
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Granted: 1973-10-02
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Expires: 1991-09-09
Abstract
Abstract The present invention is directed to a high speed sailboat which uses a horizontal, downward pulley hydrofoil which is extended from the hull on the windward side to provide a stabilizing moment equal and opposite to the sail heeling moment.
Inventors
- 👤 S Shutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:47
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B39/062
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
In combination: a sailboat having a hull and a sail; a supporting assembly fixed to said hull and projecting from the windward side of said hull; and a hold-down fin assembly comprising: an elongated body member pivotably depending from said supporting assembly and disposed to pivot freely about a yaw axis and a pitch axis, a planing surface depending from said body member at the forward end thereof, a hold-down fin fixed and depending from said body member aft of said planing surface and disposed transversely to said body member, and first means fixed to said body member and responsive to the forward motion of said sailboat to maintain said planing surface forward of said hold-down fin.
Claim 2
Dependent Claim
117 words
In combination: a sailboat having a hull and a sail; a supporting assembly fixed to said hull and projecting from the windward side of said hull; and a hold-down fin assembly comprising: an elongated body member pivotably depending from said supporting assembly and disposed to pivot freely about a yaw axis and a pitch axis, a planing surface depending from said body member at the forward end thereof, a hold-down fin fixed and depending from said body member aft of said planing surface and disposed transversely to said body member, and first means fixed to said body member and responsive to the forward motion of said sailboat to maintain said planing surface forward of said hold-down fin.
Claim 3
Dependent Claim
25 words
The combination of claim 1 wherein means are provided responsive to the forward motion thereof to maintain said planing surface in contact with the water.
Claim 4
Dependent Claim
22 words
The combination of claim 1 wherein said first means includes a vertical fin connected between said hold-down fin and said body member.
Claim 5
Dependent Claim
79 words
The combination of claim 3 wherein: means are provided responsive to the forward motion thereof to maintain said planing surface in contact with the water, and said hold-down fin is further mounted so that an angle between the body member and the fin is fixed so, as the sail boat tends to lift the body member, the planing surface remains in contact with the water and the angle of attack of the fin changes to increase the pulldown force.
Claim 6
Dependent Claim
49 words
The combination of claim 4 wherein a lifting fin is disposed depending from said body member aft of said hold-down fin and disposed, in response to the forward motion thereof, to lift the aft end of said body member to maintain said planing surface in contact with the water.
Claim 7
Dependent Claim
103 words
The combination of claim 1 wherein: second means are pivotably mounted onto the forward end of said hull and disposed to pivot downward about another pitch axis; another planing surface is mounted to the underside of said second means so that, as said second means is pivoted downward, said other planing surface forces the forward end of the hull upwards; and a transverse fin, fixed to said hull, to pivot with said hull as it pitches and disposed to be responsive to the forward motion of said hull, to lift the aft end to said hull whenever the forward end thereof is lifted.
Claim 8
Dependent Claim
31 words
The combination of claim 6 wherein a vertical fin is fixed to the under side of said hull and said transverse fin is fixed to said vertical fin below the hull.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |