发明授权
US5458327A Swing stick 失效
摇摆棒

Swing stick
摘要:
The invention is a swing stick, comprising a dowel, a baseball, and a length of rope. The dowel has proximal and distal ends, and a dowel length which is the distance between the proximal and distal ends. The baseball is attached to the distal end by the length of rope, the length of rope is less than the dowel length. The dowel is held horizontally by a pitcher at the proximal end and is reciprocated to cause the baseball to travel in a circular path beneath the dowel. The circular path is brought within a batting path of a batter, who can swing at the baseball. If the baseball is hit, it cannot hit the pitcher.
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