Circular rotor 1 rotates about fixed axis A, eccentrically located with respect to the geometric axis of housing 2. Vanes 3, of sector shape, turn about axes B. When rotor 1 rotates, liquid is delivered in the direction of the arrows. The vanes are held against the internal surface of housing 2 by centrifugal force, and are retracted into recesses a in rotor 1.
$3796$LHP,RP$