公开(公告)号：US5833560A

公开(公告)日：1998-11-10

申请号：US820972

申请日：1997-03-19

申请人： Stephen J. Davis ,  Richard Janes ,  James E. Breneman, III

发明人： Stephen J. Davis ,  Richard Janes ,  James E. Breneman, III

IPC分类号： A63B49/00 ,  A63B49/02

CPC分类号： A63B49/00 ,  A63B49/028 ,  A63B2049/0202 ,  A63B2049/0203 ,  A63B2049/0204 ,  A63B2049/0207 ,  A63B2049/0212

摘要： The present invention is a racquetball racquet that is substantially longer than a conventional 21 inch racquet, but which has a maneuverability comparable to existing racquets, and on overall playability exceeding conventional 21 inch racquetball racquets. More particularly, a racquetball racquet comprises a frame having a head portion, a handle connected to the head portion, and stringing. The head portion is a thin-wall, hollow composite tubular member having a minimum weight per unit length, and has a cross-sectional height between 15 and 28 mm, a cross-sectional width between 9 and 13 mm, and defines an egg shape strung surface having a length of at least 14 inches, and preferably between 14 and 15.5 inches, and a strung surface area greater than 95 square inches, and preferably between 100 and 125 square inches. The racquet has an overall length that is substantially greater than 21.0 inches, but less than such length as would result in a strung weight exceeding 250 grams or a mass moment of inertia about the handle end exceeding 23.0 g-m.sup.2. Preferably, the overall length is between 21.5 and 22.5 inches, and the weight is under 220 grams.

摘要翻译： 本发明是一种比常规21英寸球拍长得多的球拍球拍，但是其具有与现有球拍相当的机动性，并且在总体上的可玩性超过常规的21英寸壁球拍。 更具体地说，一种球拍球拍包括具有头部，连接到头部的手柄和拉线的框架。 头部是具有每单位长度最小重量的薄壁中空复合管状构件，并且具有15至28mm的横截面高度，9至13mm之间的横截面宽度，并且限定了蛋形状 长度为至少14英寸，优选14至15.5英寸的长度的表面面积，以及大于95平方英寸，优选在100至125平方英寸之间的表面积。 球拍的总长度基本上大于21.0英寸，但小于长度超过250克的长度，或者手柄端的质量转矩超过23.0克平方米。 优选地，总长度在21.5和22.5英寸之间，重量在220克以下。