Circular rotor 1 rotates about eccentrically located fixed axis A, coinciding with the geometric axis of housing 3. Rotor 1 slides along the internal surface a of housing 3 and delivers liquid in the direction of the arrows. Abutment 2 turns about fixed axis B and its head b, held against rotor 1 by gravity or a spring (not shown), serves to separate the suction and discharge chambers.
$3838$LHP,RP$