Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent
1981-09-21
1982-12-28
Frankfort, Charles E.
Ships
Watercraft with means used in providing sailpower
Having specifically defined hull shape
114 98, 114102, 114103, 114108, 114113, B63H 906
Patent
active
043655700
ABSTRACT:
In accordance with one aspect of the disclosure, the sail portion of a sailboard has upper and lower sections, and the lower edge (foot) of the upper section is lapped relative to the upper edge (head) of the lower section. Apparatus is provided to cause the lower edge to be on the upwind side of the upper edge, regardless of the tack that the boat is on. Such apparatus comprises a rotating boom which rotates through the sail, in such manner as to shift from one side of the sail to the other and also cause the above-described lapped relationship to occur in either tack. The diclosure further relates to a combination of the sail system with the board, to the method of achieving the indicated lapped relationship and of rotating the boom, and to other important features.
REFERENCES:
patent: 2367164 (1945-01-01), Yerger
patent: 2577917 (1951-12-01), Root
patent: 3455261 (1969-07-01), Perrin
patent: 3487800 (1970-01-01), Schweitzer et al.
patent: 3874816 (1975-04-01), Sweeney et al.
patent: 3996868 (1976-12-01), Schagen
patent: 4100870 (1978-07-01), Prade
patent: 4166425 (1979-09-01), Kummetz
patent: 4253209 (1981-03-01), Carn
patent: 4261276 (1981-04-01), Darzinskis
patent: 4263861 (1981-04-01), Vicard
patent: 4269133 (1981-05-01), Brown
patent: 4311107 (1982-01-01), Imre
Article from Popular Science Magazine entitled "Sailboarding: Exciting New Water Sport", by S. Newman Darby, Aug. 1965, vol. 187, pp. 138-141.
Brahan Thomas J.
Frankfort Charles E.
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