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    • 5. 发明授权
    • Method and apparatus for pitching and lobbing balls
    • 用于俯仰和起球的方法和装置
    • US5813391A
    • 1998-09-29
    • US390063
    • 1995-02-17
    • Albert Johnson
    • Albert Johnson
    • A63B69/40A63B65/12
    • A63B69/40
    • The present invention is directed to a method and apparatus for throwing balls. In particular, it is useful for throwing baseballs and softballs, and for lobbing tennis balls. The apparatus includes a number of components which cooperate to discharge balls at a relatively high velocity. A rotor member is provided. It is coupled to a motor shaft of a motor, preferably an electrical motor. A stator member is provided having an inlet for receiving balls and an outlet for discharging balls. The stator member completely encloses the rotor member and motor shaft thus enclosing all moving parts. Preferably, the rotor member includes a mounting member which couples to the shaft of the motor and which is positioned substantially orthogonal to the shaft of the motor. Additionally, the rotor member includes first and second parallel rails which are coupled to the mounting member and spaced apart a preselected distance which is sufficient to accommodate the balls. Preferably, the stator member defines a generally disc-shaped cavity having a predefined circumference and a predefined width. Preferably, the first and second rails of the rotor are sufficiently long to extend across the predefined circumference of the disc-shaped cavity and are sufficiently wide to extend across the predefined width of the disc-shaped cavity. Preferably, the inlet of the stator member is located at a an axis of rotation of the rotor member, opposite from the mounting member so that balls may be deposited intermediate the first and second parallel rails. Preferably, the outlet is located on the stator member at a position which is substantially tangential to a circular path defined by the rotor member. An adjustable deflector member may be located at the outlet for modifying the trajectory of balls.
    • 本发明涉及一种投掷球的方法和装置。 特别是投掷棒球和垒球以及打网球是有用的。 该装置包括多个组件,其协作以相对较高的速度排出球。 提供转子构件。 它耦合到电动机的电动机轴,优选地是电动马达。 定子构件设置有用于接收球的入口和用于排出球的出口。 定子构件完全包围转子构件和电动机轴,从而包围所有运动部件。 优选地,转子构件包括联接到马达的轴并且基本上垂直于马达的轴定位的安装构件。 此外,转子构件包括第一和第二平行轨道,该平行轨道联接到安装构件并间隔开预定的距离,其足以容纳球。 优选地,定子构件限定具有预定圆周和预定宽度的大致圆盘形空腔。 优选地,转子的第一轨道和第二轨道足够长以延伸穿过盘形空腔的预定圆周并且足够宽以延伸超过盘形空腔的预定宽度。 优选地,定子构件的入口优选地位于与安装构件相对的转子构件的旋转轴线处,使得球可以沉积在第一和第二平行轨道之间。 优选地,出口位于基本上与由转子构件限定的圆形路径相切的位置处的定子构件上。 可调节的偏转构件可以位于出口处,用于改变球的轨迹。