A CRADLE FOR LIFTING AND LAUNCHING A SMALL WATERCRAFT ON AN EXPOSED MARINE LANDING SITE

A watercraft lift with a landing cradle (10) for landing and launching a small watercraft (40) on a generally rigid fish cage or wharf/pier (30). The watercraft lift comprises at least one davit arm (20) pivotable in the vertical plane, comprising at least one set of an overlying and an underlying parallel enlongate davit arm joint (21a, 21b), in which the davit arm joints (21a, 21b) are supported in bearings at their inner ends in an inner, upper horizontal axle bearing (31a) and an inner lower horizontal axle bearing (31b), respectively, on a generally vertical beam (36) attached to the hull of the fish cage (30), and in which the davit arm joints (21a, 21b) are supported in bearings at their outer ends in an outer, upper horizontal axle bearing (14a) and an outer lower, horizontal axle bearing (14b), respectively, on the landing cradle (10). The landing cradle (10) may have buoyancy properties. Further, the watercraft lift comprises a control device (65) for a motorized elevator device (60) arranged for elevating and lowering the landing cradle (10) between an outstreched position under the sea surface for landing/launching of the small watercraft (40) at or above the deck (34) of the fish cage (30), and so that the landing cradle (10) retains the boat in a generally upright position between the sea and deck level; and in which the elevator device (60) is arranged to be released so that the landing cradle (10) with the small watercraft (40) can heave in a free position in the sea before elevation. L'invention porte sur un élévateur de bateaux, muni d'un ber d'accostage permettant de lever et mettre à l'eau de petites embarcations (4), et fixé à la cage sensiblement rigide d'un élevage de poissons ou à une digue ou un ponton (30). Ledit élévateur comporte au moins un bras de bossoir (20) pivotant dans un plan vertical et comprenant deux bielles (21a, 21b) respectivement montées pivotantes côté cage (10) sur un palier supérieur et un palier inférieur à axe horizontal disposés sur un poteau sensiblement vertical solidaire de la cage, et côté ber (10) sur un palier supérieur et un palier inférieur à axe horizontal. Le ber peut être doté de propriétés de flottabilité. L'élévateur comporte en outre la commande (65) du dispositif motorisé de levage/mise à l'eau du ber entre une position extérieure immergée d'accostage/mise à l'eau, et une position intérieure surélevée maintenant l'embarcation (40) sensiblement droite entre le niveau de l'eau et celui du (34) p