公开(公告)号：US4192505A

公开(公告)日：1980-03-11

申请号：US848940

申请日：1977-11-07

申请人： Maurice L. Tabickman ,  Douglas E. Dempsey

发明人： Maurice L. Tabickman ,  Douglas E. Dempsey

IPC分类号： A63B49/04 ,  A63B49/10

CPC分类号： A63B49/10 ,  A63B2209/023 ,  A63B2225/01 ,  A63B60/02 ,  A63B60/48 ,  A63B60/52

摘要： A game racket frame such as a tennis racket frame having controlled stiffness properties and light weight making it possible to selectively add weight to the racket at the region in which such weight will do the most good, namely, along the transverse axis of the stringing area. The racket frame itself comprises an integral structure including a head portion, a throat portion and a handle portion, the structure being composed of high modulus fibers such as graphite, glass, boron or the like, in a matrix of a synthetic resin. The frame has a non-uniform cross-sectional configuration and a taper whereby the thickness of the handle portion is greater than the thickness in the head portion, and the thickness of the throat is intermediate that of the handle portion and the head portion. The frame is such as to provide a tapered beam with the greatest area moment of inertia where the bending moments are highest. A tennis racket utilizing the improved frame has an improved coefficient of restitution at high velocity impact, improved ball rebound characteristics for off-center hits and relatively low vibration transmissibility.

摘要翻译： 诸如具有可控刚度特性和轻重量的网球拍框架的游戏球拍框架，使得可以在这种重量将最好的区域（即，沿着穿线区域的横向轴线）选择性地增加球拍的重量 。 球拍框架本身包括一个包括头部，喉部和手柄部分的整体结构，该结构由合成树脂的基体中的诸如石墨，玻璃，硼等的高模量纤维构成。 框架具有不均匀的横截面构造和锥形，由此手柄部分的厚度大于头部部分中的厚度，并且喉部的厚度与手柄部分和头部部分的厚度相等。 该框架是提供具有最大面积转动惯量的锥形梁，其中弯矩最高。 使用改进的框架的网球拍在高速冲击下具有改善的恢复系数，改进了偏心击球的球回弹特性和相对较低的振动传递率。