Abstract: A pump having electronic and mechanical components which allow an individually adjustable operation. Certain components periodically transform a driving current for an electrical drive. An adjustable clock generator adjusts transformation frequency. Pumping volume is determined and limited as desired by means of a position detection device. The pump also includes components for measuring the driving current that interact with an adjustable current-limiting device, thus allowing the pumping pressure of the pump to be adjusted and limited. The pump may include several pump cylinders which are controlled by a position control circuit in such a way that the generated partial vacuum follows a predetermined time characteristic.