Platform mechanism for buried container, has two columns parallelly fixed in two opposed faces and equipped with push frames on superior face, so that opening of cover takes place simultaneously with elevation of inferior floor

摘要

The mechanism has four columns with hydraulic cylinders located in four vertical edges of a pit. Two columns are parallelly fixed in two opposed faces, and are equipped with push frames on a superior face, so that opening of a cover takes place simultaneously with elevation of an inferior floor.