METHOD FOR VARYING THE DURATION OF A DELIVERY STROKE OF A PUMP ELEMENT, AND PUMP DEVICE

摘要

The invention relates to a pump device comprising a method for varying the duration of a delivery stroke of a pump element, the delivery stroke of which is actuated by a rotatably driven pump shaft (P) over a predetermined range of rotational positions of the pump shaft. In the method the pump shaft (P) is rotatably driven by a drive shaft (A) and the angular speed of the pump shaft at a constant angular speed of the drive shaft is increased and decreased at least once during a revolution of the pump shaft.