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    Sports racquet
    2.
    发明授权
    Sports racquet 失效
    运动球拍

    公开(公告)号：US4786055A

    公开(公告)日：1988-11-22

    申请号：US876982

    申请日：1986-06-19

    申请人： James P. Darling

    发明人： James P. Darling

    IPC分类号： A63B49/00 ,  A63B59/00 ,  A63B51/10

    CPC分类号： A63B60/54 ,  A63B49/025 ,  A63B49/028 ,  Y10S273/11

    摘要： An improved sports racquet is provided having elements placed between the outer edge of the frame and the strings. The elements prevent the strings from touching the outer edge of the frame and rotate in response to a force applied in a direction generally perpendicular to the strings, thereby expanding the sweet spot, providing improved playability of the racquet, and significantly reducing the fibration that is transferred to the player's arm. The elements are preferably spherical in shape and may be comprised of various materials, including acetal, plastic and metal. The elements preferably rest in receptacles in the racquet frame, which may be integral with the frame or separate pieces, such as sleeves or grommets, that are connected to the frame. The receptacles are preferably designed to have a surface with substantially the same curvature as the bottom surface of the elements.

    摘要翻译： 提供了一种改进的运动球拍，其具有放置在框架的外边缘和琴弦之间的元件。 这些元件防止琴弦接触框架的外边缘并响应于大致垂直于琴弦的方向施加的力而旋转，从而扩展了甜点，提高了球拍的可玩性，并显着降低了振动 转移到玩家的手臂。 这些元件的形状优选为球形，并且可以包括各种材料，包括缩醛，塑料和金属。 元件优选地放置在球拍框架中的插座中，其可与框架一体或者连接到框架的单独的件，例如套筒或索环。 容器优选设计成具有与元件的底表面基本相同的曲率的表面。

    Racket frame having interiorly located stringing lugs
    3.
    发明授权
    Racket frame having interiorly located stringing lugs 失效
    具有内部定位的拉弦的球拍框架

    公开(公告)号：US4747598A

    公开(公告)日：1988-05-31

    申请号：US748910

    申请日：1985-06-26

    申请人： Michael E. Curtis

    发明人： Michael E. Curtis

    IPC分类号： A63B49/10 ,  A63B49/00 ,  B29C45/00 ,  B29C45/26 ,  B29K105/12

    CPC分类号： A63B49/022 ,  Y10S273/01 ,  Y10S273/02 ,  Y10S273/07 ,  Y10S273/10 ,  Y10S273/11 ,  Y10S273/23

    摘要： The invention relates to a frame for a games racket e.g. tennis, of the type made as a hollow injection moulding of reinforced thermoplastics material. The frame has attachments for stringing in the form of a series of discrete lugs moulded integrally with the walls of the hollow frame and so positioned that the racket strings in their desired positions do not pass to the outer periphery of the head. The discrete lugs may for example be around the inner periphery of the head of the frame and each contain an integrally-moulded circumferential bore for string passage. The frame may be made by injection moulding around a fusible core and the shape of the core required to give the desired lugs provides strong resistance to movement under the injecting pressures hence giving improved product uniformity.

    摘要翻译： 本发明涉及一种用于游戏球拍的框架，例如 网球，作为加强热塑性材料的空心注塑成型。 框架具有附接件，用于以与中空框架的壁一体成型的一系列分立的凸耳的形式进行穿线，并且这样定位成使得球杆弦处于其期望位置不会通过头部的外周。 离散的凸耳可以例如围绕框架的头部的内周边，并且每个凸起包含用于弦线通过的整体模制的圆周孔。 框架可以通过在可熔芯周围注塑而制成，并且为了提供期望的凸耳而需要的芯的形状提供了在注入压力下的运动的强大阻力，因此提供了改进的产品均匀性。

    Game ball
    5.
    发明授权
    Game ball 失效
    游戏球

    公开(公告)号：US4211407A

    公开(公告)日：1980-07-08

    申请号：US943145

    申请日：1978-09-18

    申请人： Julius Tomar

    发明人： Julius Tomar

    IPC分类号： A63B37/06 ,  B29C44/04

    CPC分类号： B29C44/0407 ,  A63B37/06 ,  Y10S273/04 ,  Y10S273/05 ,  Y10S273/11

    摘要： Baseballs and softballs are comprised of a spherical core and a two-piece cover. The core consists essentially of a single spherical mass of partially blown ethylene vinyl acetate copolymer having 12 percent to 30 percent by weight of polymerized vinyl acetate units therein. Foam is in the center of the core which gradually reduces in cell size radially outwardly to a skin having a density substantially equal to the density of said copolymer.

    摘要翻译： 棒球和垒球由球形芯和两件套组成。 核心基本上由单球形的部分吹制的乙烯 - 乙酸乙烯酯共聚物组成，其中聚合的乙酸乙烯酯单元的重量百分比为12％至30％。 泡沫在核心的中心，其细胞径向向外逐渐减小到具有基本上等于所述共聚物密度的密度的皮肤。