公开(公告)号：US06098824A

公开(公告)日：2000-08-08

申请号：US41345

申请日：1998-03-12

申请人： Thomas Krebs ,  Michael Irsch ,  Karl-Heinz Rube

发明人： Thomas Krebs ,  Michael Irsch ,  Karl-Heinz Rube

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

CPC分类号： B66C23/701

摘要： A telescopic boom section for a mobile crane including an upper inverted U-shaped longitudinal section and a lower convexo-concave longitudinal section. The upper section and the lower section are welded to each other along the seams formed by the longitudinal edges of the upper and the lower sections such that the concave surface of the lower section and the U-shaped wall of the upper section defines a cavity therewithin. The lower section includes a plurality of arcuate segments disposed sequentially across the concave surface and which are formed by a cold roll die.

摘要翻译： 一种用于移动式起重机的伸缩臂部分，其包括上倒置的U形纵向部分和下部凹凸纵向部分。 上部和下部沿着由上部和下部的纵向边缘形成的接缝彼此焊接，使得下部的凹形表面和上部的U形壁在其中限定空腔 。 下部包括多个弧形段，其顺次地设置在该凹入表面上并由冷轧模具形成。