发明名称 BALL RETURN SYSTEM
摘要 A ball return apparatus includes a base, a substantially vertical pole extending from the base, an extensible tether extending from the pole, and a ball connected to the tether. The preferred base has a hollow interior and a closure so that the base can be filled with water or sand. The pole is mounted for articulation relative to the base, and a compression spring resists such articulation and causes the pole to return to its rest position. The tether has an extension spring connected to an elastic member. A swivel is at the end of the tether. An attachment device or plug connects to the ball. A glow ball or other ball can be used.
申请公布号 US2007042841(A1) 申请公布日期 2007.02.22
申请号 US20050205416 申请日期 2005.08.17
申请人 SUISSA PETER 发明人 SUISSA PETER
分类号 A63B69/00 主分类号 A63B69/00
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