LIFTING PONTOON Russian patent published in 2008 - IPC B63C7/04 

FIELD: construction.

SUBSTANCE: lifting pontoon consists of a case, made from two parts: an upper part, in the form of profiled prisms and/or cylinders stretched vertically, with height h₁ equal to (1.1÷1.2) h_w, where h_w is the calculated wave summit with 3% provision for one or several vertical columns, and a lower column, made in the form of a submerged volumetric pontoon type body, stretched out in the horizontal plane, forming a passive-active damper, and divided into watertight ballast compartments, hawse pipes for lifting strops, trough strop-shortening device, valves for blowing and ventilation of ballast compartments, lower nozzles with actuators, appendices and an air chamber. The columns are fixed through their bases to the lower part of the pontoon case inside its ballast chambers. The outermost ballast chamber is equipped with permeable longitudinal diaphragm walls with indents, middle ballast chamber-watertight longitudinal diaphragm wall. In the upper part of the central column, separated by a watertight longitudinal diaphragm wall, on the working water line, there are automatic valves for regulating submersion of the pontoon.

EFFECT: improvement of working conditions on an immersed seaway with the pontoon.

2 dwg