Mobile crane is mounted on stand supporting adjustable feet which have near free ends vertical adjusting screws which act on ground and are outside of stand when crane is in useful position

摘要

The mobile crane has a vertical column (1) with swivel arm (2) at top end supporting lifting gear (3) and mounted on a stand (4). The stand (4) supports at least four support feet (6) which can be changed in position and move between a transport position and useful position. Near the free ends of the feet are vertical adjusting screws (8) which act on the ground whereby when the crane is in the useful position the support feet and screws are set outside of the stand.