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US 2010/0074756 A1Published application
Propeller for boat
AssigneeSolas Science & Engineering Co., Ltd.
InventorYeun-Junn LIN
Life of this patent
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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.
Claims5
A propeller comprising:
- a hub defining a center axis and having a tail portion with an outlet, said tail portion having an outer periphery defining with said center axis a distance gradually decreasing toward said outlet;
- and
- a plurality of blades equiangularly disposed on an outer periphery of said hub.
Dependencies are inferred from the claim text.