Patent ID: 9074723
Filing Date: 2015-07-07
Classification: B63B,B66D,F16M

Abstract:
1. An automatic hooking device with controlled releasing operation for blocks for ships, boats, and vessels, comprising: a first hooking element having an engaging member, a block said hooking element operated by ascending movement of said block, and fixed on a supporting structure for at least one lifting block, at least one hooking/unhooking device having a system of movable levers reciprocally interconnected by pins having an axis, said system of movable levers adapted to move between at least two end positions, wherein one of said two end position is a first position in which said hooking/unhooking device is an engagement condition of said engaging member and one of said two end positions is a second position in which said hooking/unhooking device is a release condition of said engaging member, such that said engagement condition of said engaging member the axes of said pins being in a condition close to reciprocal alignment condition of said pins according to a certain alignment/misalignment degree of said pins, said system of movable levers is a plurality of lever elements which are reciprocally interconnected made of: a counteracting lever having two ends, a first end hinged in correspondence with one its first end by a first pin and free to rotate around said first pin, said first pin in a fixed position with respect to said supporting structure of said at least one lifting block; a connecting rod having two ends a first end fixed to said counteracting lever by a second pin, said first end of said connecting rod free to rotate around said second pin, said second pin movable with respect to said support structure, only the reciprocal constraint being present between the two respective ends of each said connecting rod and said counteracting lever; said hooking element having two ends, a first end fixed to said connecting rod by a third pin, said first end of said hooking element free to rotate around said third pin, said third pin movable with respect to said supporting structure, only the reciprocal constraint being present between the two respective ends of each said connecting rod and said hooking element, said hooking element having a fulcrum point and said hooking element free to rotate around said fulcrum point, said fulcrum point in a fixed position with respect to said support structure; in said engagement condition of said engaging member said first pin in between said second pin and third pin, in said release condition of said engaging member said second pin in between said first pin and third pin, said hooking/unhooking device having a control device fixed to one of the elements of said system of movable levers by a coupling, a force applied to said control device constituting a retaining force in said engagement condition of said hooking/unhooking device and constituting a releasing force when starting a releasing movement of said hooking/unhooking device according to the alignment/misalignment degree which is present in said condition close to reciprocal alignment condition of said pins.