Telescopic lifting device

Telescopic column according to one of the preceding claims, in which the first cylinder-piston unit and the second cylinder-piston unit have an identical stroke length and the maximum volume of the operating chamber of the second cylinder-piston unit is equal to the maximum volume of the second operating chamber of the first cylinder-piston unit.

Telescopic column according to one of the preceding claims, in which the first end of the lifting column is designed to be placed on a base.

Telescopic lifting column according to one of the preceding claims, in which the lifting column comprises three tube bodies, the hydraulic actuator unit being connected to the middle tube body.

Telescopic lifting column, comprising:

• a plurality of tube bodies which are arranged concentrically inside one another and are axially movable in each case with respect to each other,
• a hydraulic actuator unit which is arranged in the tube bodies so as to be operating in the axial direction, comprising a first hydraulic cylinder-piston unit and a second hydraulic cylinder-piston unit connected with the first, the first cylinder-piston unit being connected to a first end of the telescopic lifting column and the second cylinder-piston unit being connected to a second end of the telescopic lifting column, in which the first cylinder-piston unit has a variable operating chamber and the second cylinder-piston unit has a variable operating chamber, said operating chambers being interconnected,
• characterized in that the lifting column comprises three tube bodies, the hydraulic actuator unit being connected to the middle tube body.