Patent US2812873A successfully refreshed from Google Patents.
Patent US3706296A successfully refreshed from Google Patents.
US3706296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sailboat
Assignee: Individual
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Filing: 1970-07-28
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Granted: 1972-12-19
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Expires: 1990-07-28
Abstract
Abstract A sail, suitable for use on a sailboat, iceboat or the like, comprising a number of vertically arranged, parallel, rigid strips. The cross-section of each strip has at least one curved side and is designed to produce the maximum lateral force when placed in the path of moving air. Mechanical means are provided to control the azimuthal orientation of all the strips with respect to the direction of air movement.
Inventors
- 👤 Karl F Milde Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:24
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/067; B63H9/061; B63H9/0621; B63H9/0635
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
A sailboat comprising, in combination: a. a hull; b. a sail having a plurality of rigid elongate strips arranged substantially vertically on said hull, said strips having two sides, two edges and two ends, one of said two sides forming a curved surface, the transverse cross-sections of said strips being substantially symmetrical about their central axes; and c. means for controlling the azimuthal orientation of said sail strips, said control means including a plurality of substantially horizontal first support means, attached to each edge of each of said strips at a plurality of points along said strips, for moving said edges of each strip horizontally with respect to each other.
Claim 2
Dependent Claim
110 words
A sailboat comprising, in combination: a. a hull; b. a sail having a plurality of rigid elongate strips arranged substantially vertically on said hull, said strips having two sides, two edges and two ends, one of said two sides forming a curved surface, the transverse cross-sections of said strips being substantially symmetrical about their central axes; and c. means for controlling the azimuthal orientation of said sail strips, said control means including a plurality of substantially horizontal first support means, attached to each edge of each of said strips at a plurality of points along said strips, for moving said edges of each strip horizontally with respect to each other.
Claim 3
Dependent Claim
32 words
The sailboat defined in claim 1, wherein said one side of one or more of said strips forms a curved surface and the other of said two sides forms a planar surface.
Claim 4
Dependent Claim
23 words
The sailboat defined in claim 1, wherein each of said two sides of one or more of said strips forms a curved surface.
Claim 5
Dependent Claim
18 words
The sailboat defined in claim 1, wherein one or more of said strips are of substantially constant thickness.
Claim 6
Dependent Claim
26 words
The sailboat defined in claim 1, wherein one or more of said strips are substantially thicker at the central portion than at the edge portions thereof.
Claim 7
Dependent Claim
18 words
The sailboat defined in claim 1, wherein one or more of said strips have a substantially moon-shaped cross-section.
Claim 8
Dependent Claim
50 words
The sailboat defined in claim 1, further comprising a mast, arranged substantially vertically on said hull, said mast being rotatable about its axis, and wherein said first horizontal support means are further attached to said mast, whereby the azimuthal orientation of said strips may be controlled by rotating said mast.
Claim 9
Dependent Claim
37 words
The sailboat defined in claim 7, further comprising diagonal support means, attached to the top of said mast and extending diagonally downwardly, and wherein said first horizontal support means are further attached to said diagonal support means.
Claim 10
Dependent Claim
24 words
The sail defined in claim 8, wherein said first horizontal support means are attached to said diagonal support means by means of tension springs.
Claim 11
Dependent Claim
32 words
The sailboat defined in claim 1, further comprising at least one second horizontal support means, attached to the horizontal centers of each of said strips, for maintaining said strips in proper alignment.
Claim 12
Dependent Claim
50 words
The sailboat defined in claim 1, wherein said first horizontal support means is flexible and wherein said control means further includes means for maintaining said first horizontal support means under tension when the sail is operative, whereby said strips may be collapsed together when the sail is not in use.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |