Invention Grant
US08968125B2 Tennis racket 有权
网球拍

Tennis racket
Abstract:
A tennis racket may include a handle with a butt end, and a head configured to support strings. The tennis racket may also include a throat connecting the handle and the head, wherein the racket may have a Power Maneuverability Ratio from about 4500 to about 7915, the Power Maneuverability Ratio governed by the equation: PMR= ( S ⁢ ⁢ W ) ⁢ ( R ⁢ ⁢ W ) ( P ⁢ ⁢ U ⁢ ⁢ W ) , where SW=the moment of inertia in kilogram-centimeters squared of the tennis racket about a swingweight axis that is perpendicular to a longitudinal axis of the tennis racket, parallel to a tennis ball hitting surface contained by the head, and intersecting a point on the handle that is four inches from the butt end along the longitudinal axis, R ⁢ ⁢ W = S ⁢ ⁢ W - ( W ⁢ ⁢ t 1000 ) ⁢ ( b 10 - 10.16 ) 2 , Wt=the weight of the racket in grams, b=the distance in millimeters between a center of gravity of the racket to the butt end.
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