发明名称 Apparatus for, and method of, positioning movable elements on a T-ball mechanism for propulsion
摘要 A propulsion member (e.g. a bat) has an external switch and an internally disposed transistor which transmits signals when the switch is manually closed. A receiver in a tee mechanism receives the signals and causes a tee in the mechanism to move upwardly from a rest position to an operative position. As the tee moves upwardly to the operative position, an element (e.g. a wiffle ball) moves on a ramp to a supportive position at the top of the tee. When the tee is in the operative position, a player holding the propulsion member swings the member against the ball. This is helpful to young children (e.g. eight (8) years old or younger) in learning how to hit a baseball.
申请公布号 US2005202906(A1) 申请公布日期 2005.09.15
申请号 US20050677963 申请日期 2005.05.31
申请人 LEAL JOSE E.;BARLETTA JOHN F. 发明人 LEAL JOSE E.;BARLETTA JOHN F.
分类号 A63B47/00;A63B59/06;A63B69/00;(IPC1-7):A63B69/00 主分类号 A63B47/00
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