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US 5,934,219 AGranted
Spearhead anchor
OwnerAlain A. Poiraudinventor
Life of this patent
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OwnerAlain A. Poiraudinventor
Estimating the term…
A marine anchor designed so that it positions itself automatically and penetrates instantly into all kinds of sea beds with maximum holding power. The geometry and ballasting of the anchor ensure automatic positioning of the anchor. The off-center position of the ballast counter-balancing the weight of the shank places the center of gravity of the anchor as close as possible to the anchor tip, so that the tip can bear practically half the total weight of the anchor, the pressure exerted by the top on the sea bed is increased, and its penetration into the sea bed is promoted. The sharp corners between the two sides of the tip aids penetration into all kind of sea beds, including sea beds covered with thick seaweed, and the concave surface of the fluke provides maximum holding power. Said anchor is suitable for mooring yachts and fishing boats, as well as for marine industrial use.
A boat anchor comprising a shank having a trapezoidal cross section welded to a fluke, said fluke comprising lower and upper parts and being symmetrical with respect to a vertical and longitudinal plane of symmetry, the fluke lower part being folded along the plane of symmetry at an angle of about 100.degree., the fluke upper part being folded along the plane of symmetry at an angle of about 140.degree., said upper and lower parts being welded together to form a tip of the anchor, such that a vertical transverse cross section of the anchor through said upper and lower parts exhibits generally a chevron shape, said upper and lower parts meeting at an angle of about 20.degree., a back part of said fluke having a quasi-elliptical shape with a concave surface and two projecting ears.
Dependencies are inferred from the claim text.