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1. 发明授权

US06609742B1 Lifting apparatus for manipulating manhole castings and the like 失效
标题翻译：用于操纵人孔铸件等的提升装置
公开(公告)号：US06609742B1
公开(公告)日：2003-08-26
申请号：US09848488
申请日：2001-05-03
申请人： William C. Macom , Joseph H. Landry , William R. Gregor , James Rasmussen
发明人： William C. Macom , Joseph H. Landry , William R. Gregor , James Rasmussen
IPC分类号： B66C128
CPC分类号： B66C1/62 , B66C1/422 , B66C1/48
摘要： A lifting apparatus for manipulating manhole castings and the like having at least one pinch clamp with an inner leg and an outer leg opposing one another wherein the inner leg and the outer leg are engageable with the manhole casting. A foot of the pinch clamp is connected to at least one of the inner leg and the outer leg wherein the foot is wider than the width of the inner leg and the outer leg and is engageable with the manhole casting. A flexible support is pivotally connected to the pinch clamp and is connectable to a lifting device wherein the foot and the legs of the pinch clamp are engageable with the manhole casting when the flexible support is pulled taut. Preferably, the inner and outer legs are separate structures pivotally connected thereto. Alternatively, the inner and outer leg may be integrally fabricated from a one-piece structure. The flexible supports are connected to a connector which is connectable to a lifting device.
摘要翻译：一种用于操纵人孔铸件等的提升装置，其具有至少一个夹紧夹具，其具有彼此相对的内腿和外腿，其中内腿和外腿可与人孔铸件接合。夹紧夹的脚连接到内腿和外腿中的至少一个，其中脚比内腿和外腿的宽度宽，并且可与人孔铸件接合。柔性支撑件枢转地连接到夹紧夹具并且可连接到提升装置，其中当柔性支撑件被拉紧时，夹紧夹的脚部和腿部可与井眼铸造接合。优选地，内腿和外腿是与其枢转连接的分离结构。或者，内腿和外腿可以由一体式结构整体制造。柔性支撑件连接到可连接到提升装置的连接器。

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