| 主权项 |
1. A pontoon boat comprising:
a deck; first and second sponsons on which the deck is supported, the first and second sponsons having a metal construction, each of the first and second sponsons having a plurality of sponson sections including a front nose section, an aft section and an intermediate section, the intermediate section including a front end and a rear end, the front nose section being welded to the front end of the intermediate section and the aft section being welded to the rear end of the intermediate section; the first and second sponsons each including a sponson top and a sponson keel, the first and second sponsons also including sponson inboard sides that extend from the sponson tops to the sponson keels and sponson outboard sides that extend from the sponson tops to the sponson keels, the sponson inboard sides including sponson inboard chines and sponson inboard deadrise surfaces that extend from the sponson inboard chines to the sponson keels, the sponson outboard sides including sponson outboard chines and sponson outboard deadrise surfaces that extend from the sponson outboard chines to the sponson keels, the inboard and outboard deadrise surfaces having deadrise angles, the first and second sponsons also including keel reinforcing stringers that extend along the sponson keels; the front nose sections of the first and second sponsons including front inboard plates that define forward portions of the sponson inboard sides, and front outboard plates that define forward portions of the sponson outboard sides, the front inboard plates being shaped to define forward sections of the sponson inboard chines and forward portions of the sponson inboard deadrise surfaces, the front outboard plates being shaped to define forward sections of the sponson outboard chines and forward portions of the sponson outboard deadrise surfaces, the front inboard plates including front inboard keel flanges that extend upwardly from the keels, the front outboard plates including front outboard keel flanges that extend upwardly from the keels, the front inboard keel flanges and the front outboard keel flanges being welded together and cooperating to define forward portions of the keel reinforcing stringers; the intermediate sections of the first and second sponsons including intermediate inboard plates that define intermediate portions of the sponson inboard sides, and intermediate outboard plates that define intermediate portions of the sponson outboard sides, the intermediate inboard plates being shaped to define intermediate sections of the sponson inboard chines and intermediate portions of the sponson inboard deadrise surfaces, the intermediate outboard plates being shaped to define intermediate sections of the sponson outboard chines and intermediate portions of the sponson outboard deadrise surfaces, the intermediate inboard plates including intermediate inboard keel flanges that extend upwardly from the keels, the intermediate outboard plates including intermediate outboard keel flanges that extend upwardly from the keels, the intermediate inboard keel flanges and the intermediate outboard keel flanges being welded together and cooperating to define intermediate portions of the keel reinforcing stringers; and the aft sections of the first and second sponsons including aft inboard plates that define aft portions of the sponson inboard sides, and aft outboard plates that define aft portions of the sponson outboard sides, the aft inboard plates being shaped to define aft sections of the sponson inboard chines and aft portions of the sponson inboard deadrise surfaces, the aft outboard plates being shaped to define aft sections of the sponson outboard chines and aft portions of the sponson outboard deadrise surfaces, the aft inboard plates including aft inboard keel flanges that extend upwardly from the keels, the aft outboard plates including aft outboard keel flanges that extend upwardly from the keels, the aft inboard keel flanges and the aft outboard keel flanges being welded together and cooperating to define aft portions of the keel reinforcing stringers. |
