Curve and tilt passive cambering keel and steering fin mastless wingsail
OwnerDavid Salzinventor
Life of this patent
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Abstract
A flexible steering fin and passive cambering keel for sailboats having fundamental simplicity yet enhanced performance and superior operation in terms of design and components. The steering fin is a relatively short and elongated flexible blade with its leading edge fixed beneath the hull. A rod passing through the hull functions as a simple lever controlling the trailing edge of the blade, which provides both tilt and curvature for unique handling and ease of use. A separate flexible keel provides the function of tilting the keel as it is cambered, for greater lift. A unique pivoting resilient steering assembly is incorporated, along with a rotational circular hull section, frame and cam assembly to control the keel.
Claims9
A sailing vessel, said sailing vessel including a mast and a sail, comprising:
- a hull having a flexible steering blade;
- at least one tensile rod member securing said steering blade to said hull;
- said tensile rod member being resilient;
- and
- said tensile rod member being pivotally and rotationally secured to said hull.
A sailing vessel, said sailing vessel including a mast and a sail, comprising:
- a hull having keel;
- a mounting member securing said keel to said hull;
- said keel being flexible and horizontally elongated;
- said keel being a passive cambering blade whereby water pressure causes said blade to both tilt and curve maximizing lift;
- said hull including a circular section of said hull about said mounting member;
- and
- said circular section including rotational means for allowing said circular section to rotate imparting movement to said keel.
Dependencies are inferred from the claim text.