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1. 发明授权

US06821216B1 Ball game apparatus 失效
标题翻译：球类游戏机
公开(公告)号：US06821216B1
公开(公告)日：2004-11-23
申请号：US09582556
申请日：2000-08-22
申请人： Jan Abraham Van Asselt
发明人： Jan Abraham Van Asselt
IPC分类号： A63B6900
CPC分类号： A63B69/0024 , A63B69/0084 , A63B2208/12
摘要： An apparatus for use in playing and practicing ball games is disclosed, the apparatus including a ball suspended by a substantially inelastic upstanding line from an upper, generally horizontal or inclined elongated guideway and connected by the same or a second substantially inelastic upstanding line to a lower, generally horizontal or inclined elongated guideway. The lower guideway may be at ground level and the height of the ball above the ground may be adjustable.
摘要翻译：公开了一种用于玩和练习球类运动的装置，该装置包括由上，大体上水平或倾斜的细长导轨悬挂的基本上无弹性的直立线的球，并通过相同或第二基本上非弹性的直立线连接到下部，一般为水平或倾斜的细长导轨。下导轨可能处于地平面，地面上方的球高度可调。

2. 发明授权

US07134975B1 Ball game apparatus 有权
标题翻译：球类游戏机
公开(公告)号：US07134975B1
公开(公告)日：2006-11-14
申请号：US09980092
申请日：2000-05-25
申请人： Jan Abraham Van Asselt
发明人： Jan Abraham Van Asselt
IPC分类号： A63B69/00
CPC分类号： A63B69/0084 , A63B2102/20 , A63B2102/32 , A63B2208/12
摘要： Apparatus for practicing the techinque of lofting a ball, the apparatus having a support frame containing two upright supports linked by a horizontal cross-bar. Two inclined guideways extend between ground anchors and the supports. A substantially inelastic reciprocating device is connected to and freely movable along the guideways and a ball connected to the reciprocating device.
摘要翻译：用于练习放置球的技术的装置，该装置具有包括由水平横杆连接的两个直立支架的支撑框架。两个倾斜的导轨在地锚和支撑之间延伸。一个基本上无弹性的往复运动装置连接到导轨上并可自由移动，一个球连接到往复运动装置上。

3. 发明授权

US07014577B2 Ball game apparatus 失效
标题翻译：球类游戏机
公开(公告)号：US07014577B2
公开(公告)日：2006-03-21
申请号：US10416818
申请日：2001-11-06
申请人： Jan Abraham Van Asselt
发明人： Jan Abraham Van Asselt
IPC分类号： A63B69/00
CPC分类号： A63B69/0084 , A63B2208/12
摘要： Apparatus for improving the skills of a sports person comprises two diverging guidelines at least one of which is resilient and tensioned. A reciprocating line extends between and is connected to each guideline whose length is equal to or greater than the minimum spacing of the guidelines and less than the maximum spacing of the guidelines. A ball is connected to and generally coaxial with the reciprocating line, the arrangement being such that when the ball is struck the reciprocating line is moved by its connection with the ball along the guidelines in the direction of their divergence until restrained from further movement by forces imposed on the line caused by the increased spacing between the guidelines and stretching of the resilient guideline(s). The ball and reciprocating line are returned to their starting positions (or positions close thereto) along the guidelines in the direction of their convergence through reactive forces generated between the reciprocating line and the resilient guideline(s).
摘要翻译：用于提高运动人员的技能的装置包括两个分散的指导方针，其中至少一个弹性和张紧。往复线在每个准则之间延伸并连接到长度等于或大于指南的最小间距并小于指南的最大间距的每个准则。一个球连接到并且与往复线路大致同轴，该装置使得当球被击打时，往复运动线通过其与球的连接沿着它们沿着它们的发散方向的指导而被移动，直到受到力的进一步运动的限制由于准则之间的间距增加和弹性指南的拉伸而造成的。通过在往复运动线和弹性指导线之间产生的反作用力，球和往复运动线沿着它们的衔接方向沿着准则返回到其起始位置（或靠近其的位置）。

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