公开(公告)号：US4688688A

公开(公告)日：1987-08-25

申请号：US767255

申请日：1985-08-21

Applicant: John G. Volakakis ,  Robert L. McNelis ,  Burt H. Wallentim

Inventor： John G. Volakakis ,  Robert L. McNelis ,  Burt H. Wallentim

IPC: B66C23/20 ,  B66C23/02

CPC classification number: B66C23/16

Abstract: A jib crane system comprising a horizontally extending load beam rigidly attached to the upper end of a vertically extending mast. The lower part of the mast is positioned inside a hollow structure such as a pipe and is rotatably associated therein, and spaced from the inside surface of the pipe. A bearing boot is rigidly secured to the mast and in frictional contact with the inside surface of the pipe. The bearing boot slides around the inside circumference of the pipe in a circular or arcuate path as the mast and load beam revolve around the central axis of the mast. The bearing boot includes an outer arcuate concave contacting plate having substantially the same radius as the inside convex surface of the pipe. A ring of foil may be secured on the inside of the pipe for providing the sliding surface for the bearing boot. The mast may comprise a flanged beam having a pair of side walls with a web portion therebetween. The web may be split at the upper part thereof into two sections which are angularly spaced apart and the split sections attached at their upper ends to the rear end of the beam. Alternatively, a rod means may be secured at the upper end to the rear end of the load beam and extending angularly downward and inward therefrom for attachment to the mast at the lower end thereof.

Abstract translation: 一种起重臂起重机系统，其包括刚性地附接到垂直延伸的桅杆的上端的水平延伸的负载梁。 桅杆的下部位于诸如管子的中空结构内，并且可旋转地联接在其中并且与管的内表面间隔开。 轴承套刚性地固定到桅杆上并与管的内表面摩擦接触。 当桅杆和负载梁围绕桅杆的中心轴线旋转时，轴承架以圆形或弓形路径围绕管的内圆周滑动。 轴承套包括外弧形凹接触板，其具有与管的内凸表面基本相同的半径。 可以在管的内侧固定箔环，以提供用于轴承套的滑动表面。 桅杆可以包括具有一对侧壁的带凸缘的梁，其间具有腹板部分。 网可以在其上部分裂成两个角度间隔开的部分，并且分割部分在其上端附接到梁的后端。 或者，杆装置可以在上端固定到负载梁的后端，并且从其向下和向内成角度地延伸，以在其下端附接到桅杆。

公开(公告)号：US4511048A

公开(公告)日：1985-04-16

申请号：US384883

申请日：1982-06-04

Applicant: John G. Volakakis ,  Robert L. McNelis ,  Burt H. Wallentin

Inventor： John G. Volakakis ,  Robert L. McNelis ,  Burt H. Wallentin

IPC: B66C23/20 ,  B66C23/84

CPC classification number: B66C23/16

Abstract: A jib crane system comprising a horizontally extending load beam rigidly attached to the upper end of a vertically extending mast. The lower of the mast extends inside a hollow pipe and is rotatably associated with a base plate assembly or rotatably secured in the foundation at the site of the crane. Roller bearings are rigidly secured to the mast and positioned in frictional contact with the pipe. The roller bearing revolves around the circumference of the pipe as the mast and load beam rotate around the central axis of the mast. The roller bearings are adjustable for varying the frictional contact of the rollers with the pipe.

Abstract translation: 一种起重臂起重机系统，其包括刚性地附接到垂直延伸的桅杆的上端的水平延伸的负载梁。 桅杆的下部在中空管内延伸并且与基板组件可旋转地相关联或可旋转地固定在起重机的位置处的基座中。 滚子轴承刚性固定到桅杆上并与管道摩擦接触。 当桅杆和负载梁围绕桅杆的中心轴线旋转时，滚子轴承绕管道的圆周旋转。 滚子轴承是可调节的，用于改变滚子与管道的摩擦接触。