发明名称 BALL SWINGING TRAINING DEVICE
摘要 In accordance with one aspect, there is provided a batting training device which includes a base plate, an adjustable ball and spring unit having one end secured to the base plate and having another end with a ball secured thereto, an adjustable height guard support unit having one end secured to the base plate, a stride guard laterally movable with respect to an upper portion of the adjustable height guard support unit, and a pivotal and rotational swing path guard unit movably with respect to the upper portion of the adjustable height guard support unit.
申请公布号 US2011077109(A1) 申请公布日期 2011.03.31
申请号 US20090570605 申请日期 2009.09.30
申请人 CROWLEY JOSEPH ANDREW 发明人 CROWLEY JOSEPH ANDREW
分类号 A63B69/00 主分类号 A63B69/00
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