The swing lever pump is one of the piston pump and is suitable for dispensing of fluids, since her stroke is adjustable. In the picture below an assembly drawing of a swing lever pump and the associated kinematic scheme are given. The drive is on the first crank The stroke of the piston 4 can be changed by changing the pivot point D with the aid of a
Hand wheel on the straight line BD of the member 3 is moved. When D is congruent with the hinge point C, ie CD = 0, then the support is zero.