Patent ID: 7175000
Filing Date: 2007-02-13
Classification: B66F

Abstract:
1. A lifting truck with a telescoping mast, wherein said mast comprises a plurality of stages including a first stage that is fastened to a chassis of said lifting truck and having two vertical side beams and a central vertical beam, and one or more additional stages positioned inside said first stage and vertically displaceable relative to said first stage and having two vertical side beams and a central vertical beam; said lifting truck further comprising: a mechanism for attaching a load to the mast; a mechanism for raising the vertically displaceable stages and a load carried by the truck arranged in or adjacent the side beams of the stages of said mast; and a balancing cylinder for applying an upward force on the telescoping mast to counter weight lifted by said mechanism for raising the vertically displaceable stages, said balancing cylinder being connected to an upper portion of the second stage and a lower portion of the first stage and positioned at the central vertical beam of the second stage.