发明名称 Training bat system
摘要 A training bat system for increasing the batting skills of a baseball player. The training bat system includes a tubular member having a center bore, a plurality of weight members removably positioned within the center bore, an inner cap secured to an inner end of the tubular member, and an outer cap secured to the outer end of the tubular member. A compression spring is preferably positioned between the weight members and the inner cap for maintaining the weight members non-movably adjacent one another. The tubular member is comprised of a first section having an outer diameter similar to a handle gripping of a baseball bat, a second section having a tapered structure, and a third section having an outer diameter smaller than said first section.
申请公布号 US6682447(B1) 申请公布日期 2004.01.27
申请号 US20020189904 申请日期 2002.07.02
申请人 BLACK DONALD E. 发明人 BLACK DONALD E.
分类号 A63B15/00;A63B69/00;(IPC1-7):A63B69/00 主分类号 A63B15/00
代理机构 代理人
主权项
地址