Patent ID: 8499705

Claim:
A stern structure of a ship, comprising: a plurality of propellers; a plurality of propeller shafts configured so as to correspond to the plurality of propellers, the plurality of propeller shafts being connected to the plurality of propellers, respectively; and a stern structural body configured to be joined to a rear part of a stern body, and to contain portions of the plurality of propeller shafts extending backwardly from the stern body, wherein an inner side of the stern structural body is equivalent to an interior portion of a ship body, wherein the stern structural body supports the plurality of propeller shafts in the interior portion of the ship body, wherein the stern structural body includes a top surface portion configured so as to extend backwardly from the stern body, to spread externally with respect to the ship body center line and to cover an upper portion of one of the propeller shafts, a bottom surface portion configured so as to extend backwardly from the stern body, to spread externally with respect to the ship body center line and to cover a lower portion of the one of the propeller shafts, and a side portion configured so as to extend backwardly from the stern body and to cover a side portion of the one of the propeller shafts, the side portion being joined to the top surface portion and the bottom surface portion, wherein the top surface portion includes a first curvature portion which configures a curvature such that the stern body and the side portion are continuously and smoothly joined on a top side, and wherein the bottom surface portion includes a second curvature portion which configures a curvature such that the stern body and the side portion are continuously and smoothly joined on a bottom side.