Device for controlling a liquid flow onto the pressure side of a volumetric pump, e.g. sliding vane pump, comprises a compression spring which has a progressive spring characteristic

摘要

The device comprises a compression spring (23) which has a progressive spring characteristic. The spring is formed as a cylindrical coil spring which has three longitudinal sections (x,y,z). The first section (x) and the third section (z) are wound at a lower slope than the medium second longitudinal section (y).