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1. 发明授权

US5730456A Methods and apparatus for locking a trailer high to a receiver 失效
标题翻译：将挂车高度锁定到接收器的方法和装置
公开(公告)号：US5730456A
公开(公告)日：1998-03-24
申请号：US634724
申请日：1996-04-19
申请人： John P. Bowers
发明人： John P. Bowers
IPC分类号： B60D1/52 , B60D1/60
CPC分类号： B60D1/52 , B60D1/60
摘要： A trailer hitch includes a hollow tube insertable into a hollow receiver of a towing vehicle. Mounted inside of the tube are a pair of locking bolts and a key actuated locking cylinder. The locking bolts are spring biased outwardly through aligned holes in the tube and receiver for locking the trailer hitch to the receiver. The locking bolts are restrained against movement to an unlocking state by an arm which is connected to the key-actuated tumbler cylinder disposed within the tube. A key can be inserted into the tumbler cylinder and rotated to move the arm to an unlocking state, permitting the locking bolts to be pushed manually inwardly to an unlocking state.
摘要翻译：挂车挂钩包括可插入牵引车的空心接收器的中空管。安装在管内部有一对锁定螺栓和一个钥匙驱动的锁定缸。锁定螺栓通过管和接收器中的对准的孔向外弹簧偏压，以将拖车挂钩锁定到接收器。锁定螺栓通过连接到设置在管内的钥匙致动的滚筒滚筒的臂被约束以防止运动到解锁状态。钥匙可以插入转筒中并旋转以将臂移动到解锁状态，允许锁定螺栓被手动地向内推动到解锁状态。

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