US3851612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinnaker construction
Assignee: Individual
•
Filing: 1972-10-20
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Granted: 1974-12-03
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Expires: 1992-10-20
Abstract
Abstract A spinnaker is formed having an upper region of a desired compound curvature formed by known means and a lower region, where the curvature is substantially in a horizontal plane only, formed of a plurality of flat panels and aerodynamic cells or panels. Each aerodynamic cell is formed having a built-in pocket with sides having a straight edge and a cambered edge extending therefrom with the cambered edges being connected by a rectangular piece of sail cloth. A cross section through said built-in pocket, taken through the length of the rectangular piece of sail cloth, forms an airfoil contour.
Inventors
- 👤 D Jalbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:18
CPC Classifications
B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/067
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
An improved spinnaker comprising two main portions, an upper portion aand a lower portion, said upper portion being formed of compound curvature with a lower edge, said lower portion extending from the lower edge of the upper portion to a foot, said lower portion having a center line, said lower portion being formed of a plurality of rectangular panels on each side of said center line, at least some of said panels on each side comprising aerodynamic cells, each aerodynamic cell being formed as a closed built-in pocket, each built-in pocket having a maximum depth nearer one end of the pocket, said maximum depth extending for a substantial distance across the pocket, the maximum depth of each pocket being positioned away from the center line.
Claim 2
Dependent Claim
125 words
An improved spinnaker comprising two main portions, an upper portion aand a lower portion, said upper portion being formed of compound curvature with a lower edge, said lower portion extending from the lower edge of the upper portion to a foot, said lower portion having a center line, said lower portion being formed of a plurality of rectangular panels on each side of said center line, at least some of said panels on each side comprising aerodynamic cells, each aerodynamic cell being formed as a closed built-in pocket, each built-in pocket having a maximum depth nearer one end of the pocket, said maximum depth extending for a substantial distance across the pocket, the maximum depth of each pocket being positioned away from the center line.
Claim 3
Dependent Claim
25 words
An improved spinnaker as set forth in claim 1 wherein aerodynamic cells are arranged in a vertical line on each side of said center line.
Claim 4
Dependent Claim
123 words
An improved spinnaker as set forth in claim 1 wherein each pocket has two sides, each side being formed having a straight edge and a curved edge, the curved edge of each side having a point of maximum camber located towards one end, a length of sail material connecting said curved edges forming a built-in pocket having a maximum depth between the points of maximum camber of the curved edges of each side, said length of sail material having ends, said straight edges of said sides and the ends of said length of sail material forming a rectangle and being fixed in said lower portion of said spinnaker as a rectangular panel with the maximum depth being positioned away from the center line.
Claim 5
Dependent Claim
44 words
An improved spinnaker as set forth in claim 3 wherein the curved edge of each side has a like point of maximum camber located towards one end, the curved edge of each side forming a like air foil section with its cooperating straight edge.
Claim 6
Dependent Claim
33 words
An improved spinnaker as set forth in claim 3 wherein two aerodynamic cells are placed as adjacent rectangulaR panels in a vertical line with the sides of adjacent pockets forming a horizontal stabilizer.
Claim 7
Dependent Claim
27 words
An improved spinnaker as set forth in claim 3 where the curved edge of each side has a like point of maximum camber located towards one end.
Claim 8
Dependent Claim
16 words
An improved spinnaker as set forth in claim 6 wherein each side forms an airfoil section.
Claim 9
Dependent Claim
46 words
An improved spinnaker as set forth in claim 1 wherein the aerodynamic cells are arranged in two vertical rows on each side of said center line, adjacent vertical rows of aerodynamic cells on each side of said center line contacting each other on said center line.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |