NAVIGATION BUOY, METHOD OF ITS FABRICATION, AND SPAR BUOY INCORPORATED THEREWITH Russian patent published in 2013 - IPC B63B22/16 

FIELD: transport.

SUBSTANCE: invention relates to marine navigation hardware. Buoy comprises spar-buoy 3 with float part 1 and shaped part 2 made from polyethylene and composed of set of sections 7. Section 7 comprises, at least, two hollow segments 8. Note here that sections 7 of shaped part 2 are filled, at least, partially, with foamed polyurethane and arranged one on another on spar-buoy 3 above float part 1. Sections 7 are completely filled with foamed polyurethane. Spar-buoy 3 if composed of two coaxial tubes with space there between filled with foamed polyurethane to make one-piece solid structure of said tubes. Note here that assemblies 4, 5 for cargo gripper and anchor are located on outer tube ends and made integral with outer tube of spar-buoy 3.

EFFECT: higher stiffness at radial loads, better reparability and manufacturability, decreased weight.

7 cl, 8 dwg