Patent ID: 8732904

Claim:
A door closer selectively couplable to any one of a slide channel assembly, a standard arm assembly, and a scissor arm assembly, for a slide channel operation, a standard arm operation or a scissor arm operation, the door closer comprising: a housing, said housing containing: an output shaft extending from said housing and configured to couple to one of the assemblies, a cam disc torsion-resistantly disposed on the output shaft, a pressure roller, and a closer spring arranged in the housing and pressing the pressure roller by a connecting rod against a running surface of the cam disc; wherein the pressure roller is disposed with regard to an axial center of the output shaft such that, upon opening or closing of a swing leaf coupled to the output shaft, the pressure roller is moved translationally along a path offset from the axial center of the output shaft such that the direction of said path does not intersect the axial center of the output shaft, wherein the cam disc has a symmetrical cross-sectional surface in a plane substantially perpendicular to a longitudinal extension of the output shaft, and wherein the housing, the output shaft, the cam disc, the pressure roller, and the closer spring are configured to cooperate such that when said door closer is coupled to any one of the slide channel assembly, the standard arm assembly and the scissor arm assembly a torque applied to the output shaft by the roller during operation, as a function of the opening angle of the swing leaf, substantially identical to the torque applied to the output shaft when the door closer is coupled to any other one of the slide channel assembly, the standard arm assembly and the scissor arm assembly.