Circular rotor 1 rotates about fixed axis A, eccentrically located with respect to the geometric axis of housing 2. Rotor 1 has three separate guides a in which pistons 4 slide. Pistons 4 are actuated by springs 5. Vanes 3 are connected by turning pairs B to pistons 4. When rotor 1 rotates, vanes 3 are held constantly against the internal surface of housing 2 and deliver liquid in the direction of the arrows.
$3811$LHP,RP$