Patent ID: 8313075

Claim:
A lifting column comprising a casing consisting of three telescopic members ( 11 , 12 , 13 ) with a drive unit located in a hollow hereof, comprising a body element ( 22 ) with a chain wheel ( 25 , 33 ) at each end, over which a chain ( 47 ) runs, having a first and a second chain length ( 48 , 49 ) between the two chain wheels ( 25 , 33 ), and where a driving rod ( 50 ; 51 ) is connected to one of the chain lengths ( 48 ; 49 ), and further comprising a linear actuator ( 18 ) with an electric motor ( 19 ), which over a transmission ( 20 ) drives a spindle ( 21 ) with a spindle nut ( 28 ) secured against rotation for longitudinal displacement of the body element ( 22 ) with the chain wheels ( 25 , 33 ), so that the telescopic members ( 11 , 12 , 13 ) are extended from each other or retracted depending on the direction of rotation of the motor, wherein the three members of the casing are constructed as a telescopic guide, wherein it comprises one body element ( 22 ) with one chain ( 47 ) with chain wheels ( 25 , 33 ), wherein both chain lengths ( 48 , 49 ) are provided with a driving rod ( 50 , 51 ), wherein the spindle ( 21 ) is located within the cross section of the body element ( 22 ), and wherein the spindle nut ( 28 ) is in the body element ( 22 ).