Oar with pivotal blades
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United States of America Patent
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Apr 12, 2011
Grant Date -
N/A
app pub date -
Feb 4, 2009
filing date -
Feb 4, 2009
priority date (Note) -
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Abstract
An oar or paddle for moving forward and backward any kind of vessel through the water comprising two parallel lattices fixed at a given distance from each other and a frame moving between lattices. The frame has a multitude of parallel grooves of circular cross-section which pivotally support a multitude of plates. The plates are located axially of the grooves by the portion of the plates disposed within the groove. The grooves have a peripheral extent which permits the plates to rotate. The frame is connected with vessel's mode of movement backward or forward controller. Lattices are connected with vessel's engine.
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