发明授权
- 专利标题: Athletic swing plane trainer
- 专利标题(中): 秋千飞机教练
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申请号: US688449申请日: 1985-01-02
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公开(公告)号: US4632394A公开(公告)日: 1986-12-30
- 发明人: James A. Ryan
- 申请人: James A. Ryan
- 专利权人: Ryan James A
- 当前专利权人: Ryan James A
- 主分类号: A63B69/00
- IPC分类号: A63B69/00 ; A63B69/40
摘要:
A backstop supports a ball which is encircled by non-fabric straps whose ends overlap and are secured by pile and loop fasteners. A vertical elastic tether is fastened at one end to one of the straps and at its other end to a metal hook which detachably engages a horizontal overhead chain-link mesh portion of the backstop. The backstop also has vertical chain-link mesh portions which support targets. A transverse inelastic cord is secured at one end to a ball strap and at its other end to one of the vertical mesh portions near a target. A pole with a fork on its end is used to engage and disengage the metal hook relative to the overhead chain-link portion.
公开/授权文献
- US5731403A Low temperature manufacturing process for nylon 公开/授权日:1998-03-24
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