The invention concerns a wiper bearing housing having a bearing region and at least one mounting element, whereby at least one transitional region between the bearing region and the mounting element is deformable. The diffusion rate-determining means includes slits each having, when viewed in a plane substantially perpendicular to a longitudinal extension axis thereof, two dimensions, with at least one dimension of each slit being not more than 10 microns. Signals representative of the response of a detector to the dataset of the plurality of emitted radiation events are generated. A centrifugal regulator is connected to a rotating part of the electric motor or the hydraulic pump, which centrifugal regulator controls a pressure overflow valve, connected to the oil outlet of the hydraulic pump.