Circular rotor 1 rotates about fixed axis A, eccentrically located with respect to the geometric axis o housing 5. Three vanes 3 rotate about fixed axis D, coinciding with the geometric axis of housing 5. Links 2 are connected by turning pairs B and C to rotor 1 and vanes 3. When rotor 1 rotates, vanes 3 deliver liquid in the direction of the arrows, sliding with their ends along the internal surface of housing 5.
$3834$LHP,RP$