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1. 发明授权

US4074403A Tennis ball napper 失效
标题翻译：网球保龄球
公开(公告)号：US4074403A
公开(公告)日：1978-02-21
申请号：US753439
申请日：1976-12-22
申请人： Clifton Martin Jones
发明人： Clifton Martin Jones
IPC分类号： A63B47/04 , D06C11/00
CPC分类号： A63B47/04 , A63B2047/046
摘要： An open frame structure has spring fingers for lightly gripping a tennis ball. A shaft rotatably mounts a napping wheel in the open frame structure, the periphery of the napping wheel having bristles except for a given circumferential section. Also secured to the shaft is a radially extending arm terminating in a friction pad to one side of the napping wheel and positioned to engage the tennis ball when gripped in the spring fingers. The arrangement is such that rotation of the napping wheel causes the bristles to successively engage the tennis ball to rotate the same about an axis parallel to the axis of the napping wheel shaft. Once each rotation, the friction pad on the radially extending arm will engage a side portion of the tennis ball and rotate it slightly about a different axis so that the bristles will engage a different circumferential path portion about the ball resulting in substantially the entire area of the ball being napped after several rotations.
摘要翻译：开放的框架结构具有用于轻轻地夹紧网球的弹簧手指。轴可旋转地将起毛轮安装在开放框架结构中，除了给定的圆周部分之外，起毛轮的周边具有刷毛。还固定到轴上的是径向延伸的臂，其终止于摩擦垫到起毛轮的一侧，并定位成当夹在弹簧指中时与网球接合。该布置使得起毛轮的旋转导致刷毛连续地接合网球以使其围绕平行于起毛轮轴的轴线的轴旋转。一旦每次旋转，径向延伸的臂上的摩擦垫将与网球的侧部接合并且围绕不同的轴线稍微旋转，使得刷毛将围绕球接合不同的圆周路径部分，导致基本上整个区域几轮旋转后，球被打盹。

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