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1. 发明授权

US4402487A Jack for lifting unbalanced loads 失效
标题翻译：杰克提升不平衡载荷
公开(公告)号：US4402487A
公开(公告)日：1983-09-06
申请号：US261056
申请日：1981-05-06
申请人： Raymond C. Donnelly
发明人： Raymond C. Donnelly
IPC分类号： B66F13/00 , B66F3/00
CPC分类号： B66F13/00 , Y10S254/01 , Y10S254/04
摘要： A jack for lifting unbalanced loads such as automobiles, comprises a base having a raised portion thereon with a recess therein to accommodate the base of a jack column. The recess for the jack column is offset on the base and oriented to place a major portion on the base beneath the jack saddle during operation in order to increase stability. A substantially circular collar is mounted about the jack column at a predetermined distance from the base, said collar being supported by a plurality of spaced flexible legs pivotally mounted to the base at one end and curving upwardly to a removable mounting at the collar to prevent column tilt. The jack also includes a saddle assembly having a movable saddle with a protruding portion to engage an aperture in the load which is oriented to approximate the direction of lift point shift. The saddle is free to move perpendicular to the column against the action of a spiral spring when a load is applied and its rotational motion about the column is resiliently restrained by spring means. Thus, the two elements of lift point shift, magnitude and direction, cause compensating movements in the saddle assembly to increase stability, and thereby improve functional reliability and operational safety.
摘要翻译：用于提升诸如汽车的不平衡载荷的千斤顶包括其上具有凸起部分的基部，其中具有凹部以容纳千斤顶柱的基部。千斤顶柱的凹槽在基座上偏移并且在操作期间定向成将主要部分放置在千斤顶鞍座下方的基座上，以增加稳定性。基本上圆形的套环以距离基座预定距离的方式围绕千斤顶柱安装，所述轴环由多个间隔开的柔性支撑支撑，所述多个间隔开的柔性支腿在一端枢转地安装到基座并向上弯曲到在套环处的可拆卸安装件，倾斜。千斤顶还包括具有可移动鞍座的鞍座组件，该鞍座具有突出部分，以接合负载中的孔，其接近于升程点移动的方向。当施加负载时，鞍座可以克服螺旋弹簧的作用而自由地垂直于柱移动，并且其围绕柱的旋转运动由弹簧装置弹性约束。因此，提升点移动，幅度和方向的两个要素导致马鞍组件中的补偿运动，以增加稳定性，从而提高功能可靠性和操作安全性。

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