Circular rotor 1 rotates about eccentrically located fixed axis A, coinciding with the geometric axis of housing 4. Sliding abutment 2 reciprocates in fixed guides a and is held against rotor 1 by the action of spring 3. When rotor 1 rotates, it slides along the internal surface of housing 4 and delivers fluid in the direction of the arrows. Abutment 2 separates the suction and discharge chambers.
$4012$THP,GP$