Tennis racket
AssigneeLa Chemise Lacoste
InventorsRene Lacoste, Alain Gallais
Life of this patent
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Abstract
A generally oval tennis racket characterized in that its strung surface comprises five zones: a central zone (A) including the geometric center (M) and the center of percussion (P) and having at least three cross strings; and on either side thereof two zones (B and C) each having at least three cross strings whose average length exceeds that of the cross string in the central zone (A). This construction increases the area (sweet spot) over which resilience is substantially uniform.
Claims6
A tennis racket comprising a rigid closed frame delimiting a strung surface and a handle connected to the frame, the strung surface comprising main strings running parallel to the axis of symmetry X of the frame and cross strings parallel to an axis Y perpendicular to axis X and crossing it at a point M near the middle of a section X.sub.1 of the axis X within said frame, the racket being characterized in that the strung surface comprises five zones:
- a central zone A, including both the point M and the center of percussion P together with at least three cross strings;
- two zones B and C, one on either side of zone A, each including at least three cross strings having an average length exceeding the average length of the cross strings in zone A;
- and two zones D and E, respectively, on the sides of zones B and C,
- said frame containing local reinforcement in the area of attachment of the cross strings in zones A, B, and C sufficient to insure that the frame in zones A, B, and C is substantially as rigid as any other part of the frame.
Dependencies are inferred from the claim text.