Patent ID: 8635922

Claim:
A height-adjustable actuation device, comprising: a. a drive ( 2 ) for height adjustment of the actuation device ( 1 ; 1 a ) in a direction of extension ( 37 ) and in a direction of retraction ( 39 ) opposite to the direction of extension ( 37 ); b. a casing ( 6 ; 6 a ) having a longitudinal axis ( 5 ); c. a hollow spindle ( 7 ) arranged in the casing ( 6 ; 6 a ) for displacement of a first lid ( 8 ) arranged on the hollow spindle ( 7 ) along the longitudinal axis ( 5 ); d. an internal spindle ( 9 ) arranged inside the hollow spindle ( 7 ) for displacement of a second lid ( 10 ) arranged on the internal spindle ( 9 ) along the longitudinal axis ( 5 ); e. with the hollow spindle ( 7 ) and the internal spindle ( 9 ) being non-rotatably connected to each other in terms of a rotation about the longitudinal axis ( 5 ); and f. with the hollow spindle ( 7 ) and the internal spindle ( 9 ) being displaceable relative to each other along the longitudinal axis ( 5 ), wherein the hollow spindle ( 7 ) is a compound part comprising an external component ( 25 ) and an internal component ( 26 ) arranged inside the external component ( 25 ), and wherein the internal component is a hexagonal profile pipe ( 26 ) of metal while the external component is a plastic pipe ( 25 ) injection-molded around the hexagonal profile pipe ( 26 ).