Patent ID: 7922549
Filing Date: 2011-04-12
Classification: B63H

Abstract:
1. A device for moving a vessel having an engine forward and backward through water, comprising: a first shaft having a first end and a second end, said first shaft having an opening defined therein of circular cross-section; a second shaft having a first end and a second end, said second shaft movably disposed within said opening defined in said first shaft; said vessel having a backward and forward movement controller; first and second lattices disposed parallel to one another at a distance, said first lattice connected to said first end of said first shaft; a frame disposed between said first and second lattices, said frame being connected to said first end of said second shaft, said frame movable between said first and second lattices, said frame having a plurality of parallel grooves defined therein, said grooves being of substantially circular cross-section; and a plurality of plate members, each having support portions, each plate member pivotally supported in said parallel grooves, said plate members being positioned axially of said grooves and supported by said support portions of said plate members disposed within said grooves, said grooves having a peripheral extent sufficient to permit said plate members to rotate.