Hydraulic transformer

A hydraulic transformer wherein a multiplicity of displacers are guided in a displacement member. The stroke of the displacers is determined through the intermediary of a cam element, with pressure medium supply and discharge being controlled through the intermediary of a control member having at least three control grooves. In accordance with the invention either the displacement member or the cam element or the control member may be driven, whereas-depending on which component is driven-the cam element or the displacement member is mounted so as to be freely adjustable, and the remaining third component is accommodated integral with the housing.