Deep water lifting hoist - has vertical piles on cross piece foundation carrying bridge and ballasting to give lift

摘要

The lifting hoist consists of a cross piece foundation supporting vertical piles and a working bridge. The bridge level can be varied relative to the sea level with ballast which can be automatically adjusted. The bridge can be immersed to grip a floating load near the piles and underneath. The equipment then lifts to above sea level. The load can be moved on the bridge by tilting it by ballast variation. An opening in the bridge can be partly closed by the load and the bridge has a horizontal U section.