发明名称 Golf swing practice device
摘要 A golf practice aid is provided including a base and a ball swinging mechanism including an arm having a first end rotatable with respect to the base about a vertical axis. The ball swinging mechanism further includes a tether cord having a top end coupled to a second end of the arm and upper and lower compartments, including a central gear and a pinion gear mounted on an elastomeric friction element located in the upper compartment. A bottom end of the tether cord is equipped with a golf ball fixed thereto.
申请公布号 US5989129(A) 申请公布日期 1999.11.23
申请号 US19980168480 申请日期 1998.10.08
申请人 O'NEILL, WILLIAM T. 发明人 O'NEILL, WILLIAM T.
分类号 A63B69/00;A63B69/36;(IPC1-7):A63B69/36 主分类号 A63B69/00
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