Tennis racket
OwnerMichael S. Sulprizioinventor
Life of this patent
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Abstract
A tennis racket strung with a string grid, each strand of which has a cross-section defining a polygon with concave sides thus providing the grid strands with longitudinally extending concave surfaces which meet to form longitudinally extending sharp edges. At each junction between the strands of the string grid the sharp edges contact each other only at four sharply defined spaced points thus locking the strands to each other at each junction. In weaving the string grid substantial rectilinearity of the concave surfaces and sharp edges of the strands is maintained.
Claims9
A tennis racket comprising a frame having a handle and a string grid mounted within said frame, said string comprising a pair of mutually transverse arrays of a plurality of strands, said strands having their ends affixed to said frame with each strand of each array extending across said frame and passing on opposite sides of each adjacent pair of strands in the other array, each strand of each array having a cross-section defining a polygon with a longitudinally extending concave surface on each side thereof, adjacent ones of said longitudinally extending concave side surfaces meeting to define sharp longitudinally extending edges and each junction between strands of said pair of arrays providing compressive contact at four sharply defined spaced points with the surfaces between said points spaced from each other.
Dependencies are inferred from the claim text.