Patent ID: 7828162
Filing Date: 2010-11-09
Classification: B66C

Abstract:
1. A vehicle mounted crane comprising a super-structure including a top-slewing system, said system comprising a vertical tower and a jib mounted on the tower comprising a first adjusting mechanism connected to the tower at a distance from the bottom end of the tower, said first adjusting mechanism serving to raise the tower from an essentially horizontal transport position into an inclined position, and a second adjusting mechanism acting upon the tower in the region of the bottom end of the tower to shift the bottom end of the tower from a first location in relation to the vehicle when said tower is in the inclined position to a second location in relation to the vehicle to raise the tower from the inclined position into the vertical working position, the crane further including means for guiding the shifting movement of the lower end of the tower from the first location to the second location as it is raised.