发明名称 Baseball pitching practice apparatus
摘要 A pitching practice apparatus includes a frontal mechanical strike zone target at which the pitcher aims the ball and which contains yielding elements enabling the ball to pass rearwardly through a photoelectric sensing plane having sensing beams on two orthogonal axes. Behind the photoelectric sensing arrangement which precisely locates the position of the ball in the strike zone horizontally and vertically is a spring-mounted ball return panel against which the pitched ball impinges and is returned to the pitcher by rebounding from the panel. A ball return trough forming the floor of the apparatus extends between the ball return panel and the frontal strike zone target.
申请公布号 US4657250(A) 申请公布日期 1987.04.14
申请号 US19850715249 申请日期 1985.03.25
申请人 NEWLAND, PAUL H.;BRIGGS, RICHARD J. 发明人 NEWLAND, PAUL H.;BRIGGS, RICHARD J.
分类号 A63B69/00;A63B63/00;(IPC1-7):A63B71/02 主分类号 A63B69/00
代理机构 代理人
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