发明名称 Baseball swing training apparatus
摘要 A baseball swing training apparatus including that enables a batter to determine whether his swing followed the proper principles for hitting or batting. Oriented for use by both right-handed and left-handed batters it is intended to teach batters how their wrists should react in order to most effectively hit a ball. This generally baseball bat shaped apparatus includes a swing indicator disposed inside the barrel, which impacts one of four impact points producing an audible response when a swing is performed correctly. An incorrect swing produces no audible response.
申请公布号 US6923737(B1) 申请公布日期 2005.08.02
申请号 US20030426056 申请日期 2003.04.29
申请人 WALKER KEITH 发明人 WALKER KEITH
分类号 A63B15/00;A63B69/00;(IPC1-7):A63B69/00 主分类号 A63B15/00
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