Patent ID: 7188709
Filing Date: 2007-03-13
Classification: B66F

Abstract:
1. An extendable mast structure for a fork-lift truck, comprising an outer mast fixed to a carriage, spaced columns of which are interconnected via an upper and a lower traverse an extendable inner mast guided by said outer mast on which a load-carrying member is guided to be movable up and down and the columns of which are interconnected via an upper and a lower traverse or a cross-beam one mast lift cylinder for each column of said inner mast which are supported on said outer mast and piston rods of which are adapted to be connected to said cross-beam, and a setting member between said piston rods and cross-beam for an equalization of the lift, characterized in that a male-threaded setting component is attached to the upper end of said piston rod (