Lightweight anchor

B - Operations – Transporting – 63 – B

Patent

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B63B 21/44 (2006.01)

Patent

CA 2117444

The lightweight or twin-fluke anchor is the most frequently used type of anchor in service on commercial and pleasure boats today. The weakest part of this anchor is the crown assembly. When a force is applied to the shank, the shank bears against the crown plate of the crown assembly at a single point. The embodiment of prior art anchors causes a can-opener like shear stress at the joint between the crown plates and the spacer plates that can cause the anchor to fail. In this invention the problem is eliminated by adding a pair of stop plates to the crown assembly to limit the rotation of the shank. These stop plates engage the shank over a length and greatly strengthen the anchor, eliminating the above type of failure.

L'ancre légère à deux pattes est le type d'ancre qu'on utilise le plus fréquemment de nos jours sur les bateaux de pêche commerciale et les bateaux de plaisance. La partie la plus faible de cette ancre est la croisée. Quand une force est appliquée à la verge, la verge porte contre la plaque de croisée en un seul point. Avant la présente invention, les ancres subissaient une contrainte de cisaillement du genre ouvre-boîte au droit du joint entre les plaques de croisée et les plaques d'espacement qui pouvait entraîner la rupture de l'ancre. Avec la présente invention, le problème est éliminé par l'addition d'une paire de plaques d'arrêt à la croisée pour limiter la rotation de la verge. Ces plaques d'arrêt sont en prise sur une certaine longueur de la verge et renforcent grandement l'ancre, ce qui élimine le problème de rupture susmentionné.

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