Skis Rossignol Sa

Annie Blanc

Gilles Du Gardin

A sport racket is provided wherein the thickness (e) of the cross section of the racket frame at the head and shafts is smaller than the thickness of the frame at the handle. This cross section has a constant perimeter, and has a maximum thickness (e) at the median side areas of the head of the racket.

Sport racket

A racket for ball games includes a frame having a shaped cross-section. The shape of the cross-section varies along the periphery of the frame so that the neutral axis of the racket is situated at a varying distance from the internal edge and external edge of the frame along the periphery of the racket. The neutral axis is located closer to the edge being subjected to compressive stress than the edge subjected to tensile stress. The shape of the cross-section may be such that the ratio of the distances between neutral axis and the internal and external edges, respectively, is equal to the ratio of the tensile and compressive strains of the material forming the frame. In four spaced zones of the frame, the neutral axis is closer to the external edge and in four zones spaced intermediate each of the first four zones, the neutral axis is closer to the internal edge of the frame. The cross-section of the frame may have a rounded trapezoidal shape.

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Villeurbanne, France

Annie Blanc