Propeller for boat
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 17, 2012
Grant Date -
Mar 25, 2010
app pub date -
Jan 15, 2009
filing date -
Sep 25, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A propeller for a boat includes a hub having a tail portion with an outlet, and a plurality of blades equiangularly disposed on the hub. The outer periphery of the tail portion defines with a center axis of the hub a distance gradually decreasing toward the outlet. Thus, the propeller has the advantages of reducing the drag and increasing the propulsive force of the boat when it rotates.
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Family
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Cited Art Landscape
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