Patent ID: 8001909

Claim:
A telescopic lifting column for height adjustment of an elevatable table having a table top, said lifting column comprising: a stationary quadrangular profile having upper and lower ends and an internal width a, said lower end being coupled to a transverse beam; a sliding quadrangular profile having upper and lower ends and an internal side wall; said sliding quadrangular profile being slidable relative to and within the stationary quadrangular profile; a transverse beam connected to the table top and to the upper end of the sliding quadrangular profile; a toothed rack fixedly mounted on the internal side wall of the sliding quadrangular profile; a gear wheel coupled to a gear motor mounted on the stationary quadrangular profile; wherein the stationary and sliding quadrangular profiles overlap for a distance b when the lifting column is in an extended position; wherein the toothed rack is engaged in the gear wheel, such that the sliding quadrangular profile is raised and lowered relative to the stationary quadrangular profile by activation of the gear motor; wherein the stationary and sliding quadrangular profiles each have an open side and an approximately U-shaped cross section; wherein the toothed rack comprises a guide way having a width corresponding to internal width a of the stationary quadrangular profile; wherein said guide way meshes with a pair of guide pins that are connected to the stationary quadrangular profile; and wherein a distance between said pair of guide pins corresponds to distance b of the overlap.