Ships – Sail or control means therefor – Having means to vary shape of sail
Reexamination Certificate
2005-05-17
2005-05-17
Avila, Stephen (Department: 3617)
Ships
Sail or control means therefor
Having means to vary shape of sail
Reexamination Certificate
active
06892659
ABSTRACT:
The invention relates to a boat sail comprising a first (4) and a second (6) sheet, having similar shape and dimensions, coupled each other in correspondence of the outer perimeter and by a plurality of transverse ribs (12), provided between said sheets (4, 6), suitable to divide said sail into multi-sections (11), said sail (2) being characterised in that it provides a valve (14), that can be opened and closed to allow the air to enter within said sail into the space between said first (4) and second (6) sheets, at least a retractor element (15) provided on each rib (12), that can take two positions, respectively for the closure of the rib (12) and for opening the same, in order to make the sail taking a wing contour shape, and means (16) for opening and closing said retractors.
REFERENCES:
patent: 5775249 (1998-07-01), Samuel
patent: 5931109 (1999-08-01), Hill
patent: 20020100406 (2002-08-01), Costa et al.
patent: 2 645 112 (1990-10-01), None
patent: 2 748 982 (1997-11-01), None
Avila Stephen
Hedmen & Costigan, P.C.
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