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热词
    • 69. 发明授权
    • Baseball practice mechanism
    • 棒球练习机制
    • US5012790A
    • 1991-05-07
    • US371063
    • 1989-06-26
    • Michael R. Bates
    • Michael R. Bates
    • A63B69/00A63B69/40
    • A63B69/406A63B69/0002
    • A baseball practice mechanism defined by a tripod mounted framework supporting a baseball propelling arrangement and including a pivotal structure controlling a desired training need, as, for example, flyballs, batting practice, grounders, or the like. The tire speed is accomplish by use of an adjustment thread cooperatively engaging a pivotal plate which bears against the housing of a power source, serving, in end purposes, as a variable speed control for the rotation of the baseball propelling tire. Baseball feeding is accomplished through an entry opening into a V-shaped cup, providing safety to the user and, at the same time, the positive and repetitious squeezing, and propelling, of the baseball in a controlled direction through simple pivotal action. The mechanism is mobile through pulling movement of one or more of the tripod base legs combined with the rotating action afforded by the tire.
    • 由支撑棒球推进装置的三脚架安装的框架限定的棒球练习机构,并且包括控制期望的训练需要的枢轴结构,例如飞球,击球练习,接地机等。 轮胎速度通过使用协调地接合抵靠电源壳体的枢转板的调节螺纹来实现,在最终目的中,作为用于棒球推进轮胎的旋转的可变速度控制。 棒球喂养通过进入V形杯的进入来实现,为使用者提供安全性,同时通过简单的枢纽动作,在受控方向上积极和重复挤压和推进棒球。 该机构通过一个或多个三脚架底座腿的移动结合轮胎所提供的旋转动作来移动。