公开(公告)号：US4170854A

公开(公告)日：1979-10-16

申请号：US860681

申请日：1977-12-15

Applicant: Jan B. Palmcrantz ,  Ulf C. Rilbe

Inventor： Jan B. Palmcrantz ,  Ulf C. Rilbe

IPC: B66C23/16 ,  B66C20060101 ,  B66C23/26 ,  B66C23/36 ,  B66C23/62 ,  B66C23/84 ,  E04H12/34

CPC classification number: B66C23/54 ,  Y10T403/7039

Abstract: An improved joint and method of providing such a joint between the upper and lower portions of a rotatably driven crane post, comprising a sleeve-shaped member formed internally with screw threads and provided at the lower end of the upper position, a pin provided at the upper part of the lower post portion and formed externally with screw threads matching the sleeve member threads, and a collar on the lower post portion below the pin against which collar the sleeve-shaped member is pressed upon screwing together of the lower and upper post portions to form said joint.

Abstract translation: 一种在可旋转驱动的起重机柱的上部和下部之间提供这种接头的改进的接头和方法，包括在内部形成有螺纹并且设置在上部位置的下端的套筒形构件， 下部柱部分的上部，并且由外部形成有与套筒构件螺纹相匹配的螺纹，以及位于销下方的下部柱部分上的套环，套筒形构件在下部和上部柱部分拧紧在一起时被压紧 形成所述接头。