公开(公告)号：US4987925A

公开(公告)日：1991-01-29

申请号：US414948

申请日：1989-09-29

申请人： Evart J. Vroonland

发明人： Evart J. Vroonland

IPC分类号： B67D7/00 ,  B67D9/02

CPC分类号： B67D7/002 ,  B67D9/02 ,  Y10T137/8807

摘要： This invention provides for a spring-balanced loading arm with a positive lock-down device use in a material handling system. It includes a swivel arm which is pivotally connected at one end to a support structure for swivel movement both in horizontal and vertical planes relative to the support structure. There is also provided an extendable lock-down device for positively locking the swivel arm. One end of the lock-down device is pivotally connected to the support structural and the other end is fixedly connected to the swivel arm. The lock-down device is adapted to be locked in position at several predetermined lengths. When the lock-down device is locked in a given position, it also positively locks the swivel arm and prevents any vertical movement of the loading arm.

摘要翻译： 本发明提供一种具有在物料搬运系统中使用的正锁定装置的弹簧平衡装载臂。 它包括一个旋转臂，其在一端枢转地连接到支撑结构，用于相对于支撑结构的水平和垂直平面的旋转运动。 还提供了用于可靠地锁定旋转臂的可延伸的锁定装置。 锁定装置的一端枢转地连接到支撑结构，另一端固定地连接到旋转臂。 锁定装置适于以几个预定长度被锁定在适当位置。 当锁定装置被锁定在给定的位置时，它还可以肯定地锁定旋转臂并防止装载臂的任何垂直运动。

公开(公告)号：US4537233A

公开(公告)日：1985-08-27

申请号：US506276

申请日：1983-06-21

申请人： Evart. J. Vroonland ,  William M. Curtis

发明人： Evart. J. Vroonland ,  William M. Curtis

IPC分类号： B67D7/00 ,  F16L27/08 ,  B65B3/04

CPC分类号： B67D7/002 ,  F16L27/08 ,  Y10T16/53862 ,  Y10T16/5389 ,  Y10T16/54021

摘要： This invention provides for a loading arm for use with material handling systems and includes a support structure and an arm pivotally attached to the support structure for swivel movement in both the horizontal and vertical plane relative to the support structure. There is also provided a balancing system for balancing the swivel arm relative to the support structure which includes a coil spring having a pre-determined length, a housing enclosing the coil spring, a first end of the housing having a structure for engaging a first coil end of the coil spring and an adjustment device for positioning that first coil end in infinitely small increments along a generally circular path which is radially disposed from the center line of the spring, a second end of the housing having another groove for engaging a second coil end of the spring, a linkage arm attached at one end to the swivel arm and at its other end to the second end such that movement of the swivel arm in the vertical plane will cause the second coil end to move along a generally circular path radially disposed from the centerline of the spring. The system also includes a mounting structure for attaching the balancing system to the loading arm and the horizontal swivel.

摘要翻译： 本发明提供了一种用于材料处理系统的装载臂，并且包括支撑结构和枢转地附接到支撑结构的臂，用于相对于支撑结构在水平和垂直平面中的旋转运动。 还提供了一种平衡系统，用于相对于支撑结构平衡旋转臂，该平衡系统包括具有预定长度的螺旋弹簧，包围螺旋弹簧的壳体，壳体的第一端具有用于接合第一线圈 螺旋弹簧的端部和用于以沿弹簧的中心线径向设置的大致圆形路径以无限小的增量定位第一线圈端的调节装置，壳体的第二端具有用于接合第二线圈的另一个凹槽 弹簧的端部，连接臂在一端附接到旋转臂并且在另一端附接到第二端，使得旋转臂在垂直平面中的运动将使得第二线圈端部沿着径向上的大致圆形路径移动 从春天的中心线处理。 该系统还包括用于将平衡系统附接到装载臂和水平旋转装置的安装结构。

公开(公告)号：US4016688A

公开(公告)日：1977-04-12

申请号：US581172

申请日：1975-05-27

申请人： Joseph B. Tiffin ,  Daniel G. Quinn ,  Evart J. Vroonland

发明人： Joseph B. Tiffin ,  Daniel G. Quinn ,  Evart J. Vroonland

IPC分类号： B66C23/687 ,  B66C23/693 ,  B66C23/697 ,  B66C23/70 ,  B66C23/04

CPC分类号： B66C23/701 ,  B66C23/705

摘要： An extensible cantilever boom assembly, for a mobile crane, has telescopically interfitting box-like boom sections, that include web or side plates of uniform thickness. These plates are shaped to provide increased stiffness, and openings are provided within some of the plates to reduce the plate weight, so that the load carrying capacity of the boom is increased. A plurality of shaped portions are formed within the plates, at locations intermediate the top edges and the bottom edges of the plates. These plate portions are spaced laterally from the parallel planes that define the side surfaces of the plates, at the junctures of the side surfaces with the top and bottom edges. The shaped portions, located at longitudinally spaced intervals, are aligned in a row that extends longitudinally of the plate. Each shaped portion has a regular geometrical pattern that forms a laterally projecting protuberance on one side of the plate and a corresponding depression on the opposite side of the plate.

摘要翻译： 用于移动式起重机的可伸缩悬臂组件具有可伸缩的相互连接的箱状悬臂部分，其包括均匀厚度的腹板或侧板。 这些板被成形为提供增加的刚度，并且在一些板中提供开口以减小板重量，使得吊杆的承载能力增加。 在板的顶部边缘和底部边缘之间的位置处，在板内形成多个成形部分。 这些板部分在与顶部和底部边缘的侧表面的接合处与限定板的侧表面的平行平面横向隔开。 位于纵向间隔开的成形部分沿着板的纵向延伸的一排排列。 每个成形部分具有规则的几何图案，其在板的一侧上形成横向突出的突起，并且在板的相对侧上形成相应的凹陷。