Ball racket

Details Ball racket Ball racket

A - Human Necessities

63

B

A63B 49/02 (2006.01) A63B 51/02 (2006.01) A63B 59/00 (2006.01) A63B 49/10 (2006.01)

Patent

CA 2248844

There is disclosed a ball racket and, in particular, a tennis racket including a racket head and a handle portion. The frame members extend from the handle portion over the strung region of the head portion. The open area defined between the frame members running into the handle portion at acute angles as a whole constitutes the string plane and the longest central string extending in the longitudinal axis of the racket is tightened between the head and the point of origin adjacent the handle, of the acute angles (.alpha.) of the frame members running into the handle portion. The racket has a strung weight of less than 260 g and a free-free vibration frequency of more than 200 Hz. The ratio of the width of the string area to the length of the longest string of the string area is smaller than 0.6.

La présente invention fait état d'une raquette pour balle et, plus particulièrement, d'une raquette de tennis ayant une tête et un manche. Les éléments du cadre se prolongent à partir du manche et se terminent au-dessus du cordage qui forme la tête de la raquette. La section percée, délimitée par les éléments du cadre se raccordant au manche en général à des angles aigus, forme un plan destiné au cordage. La corde centrale la plus longue, dans le sens longitudinal de la raquette, est étirée entre la tête et le point d'origine, situé près du manche, des angles aigus (.alpha.) crées par les éléments du cadre prolongés dans le manche. La raquette, y compris le cordage, pèse moins de 260 g et présente une fréquence de vibration libre-libre de plus de 200 Hz. Le rapport entre la largeur du tamis et la longueur de la plus longue corde est inférieur à 0,6.

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