| 摘要 |
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=(SW)(RW)(PUW),;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,;RW=RW-(Wt1000)(b10-10.16)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. |
| 主权项 |
1. A tennis racket, comprising:
a handle with a butt end; a head configured to support strings; and a throat connecting the handle and the head; wherein the racket has a Power Maneuverability Ratio greater than about 4500, the Power Maneuverability Ratio governed by the equation:PMR=(SW)(RW)(PUW),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,RW=SW-(Wt1000)(b10-10.16)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, TW=the moment of inertia of the tennis racket about the longitudinal axis, and PUW=(Wt)(b). |
