Patent ID: 6866482

Claim:
A propeller comprising one hub ( 2 ), a plurality of propeller blades ( 3 ) and a single-side arc brim ( 5 ) or a double-side arc brim ( 1 ) fixed on the tip of each blade, characterized in that said single-side arc brim ( 5 ) or said double-side arc brim ( 1 ) is a concentric arc with the propeller blades, an outline projected in the axial direction by said single-side arc brim ( 5 ) or said double-side arc brim ( 1 ) is substantially equivalent to the rotation circle of the tip of the propeller blades, and the width of said single-side arc brim ( 5 ) or said double-side arc brim ( 1 ) is the same as or less than that of each propeller blade ( 3 ) at its juncture with the brim.