Tennis racket
AssigneeWilson Sporting Goods Co.
InventorsWilliam D. Severa, Frank Garrett, Po-Jen Cheng
Life of this patent
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Abstract
A tennis racket is made lighter than conventional tennis rackets yet has a higher center of percussion and a higher frequency of vibration. The head of the racket is ovoid, and the widest part of the head is above the longitudinal midpoint of the head. The longitudinal strings are fan-shaped and diverge outwardly and upwardly from the bottom of the head.
Claims13
A tennis racket comprising a frame having an elongated shaft portion and a head portion and strings supported by the head portion, the frame being formed from composite material comprising fibers and resin, the shaft terminating in a butt end and the head having top and bottom portions, the racket having a length of at least 26.5 inches, a strung weight of less than 9.5 ounces, a balance point of greater than 15.5 inches from the butt end, a center of percussion of greater than 19.5 inches from the butt end, and a frequency of vibration of the first mode of bending under free-free constraint of at least 190 Hz.
Dependencies are inferred from the claim text.