Circular rotor 1 rotates about eccentrically located fixed axis A, coinciding with the geometric axis of housing 3. Rotor 1 contacts the internal surface of housing 3. When rotor 1 rotates, liquid is delivered in the direction of the arrows. The suction and discharge chambers are separated by two hinged abutments 2 which turn about fixed axes B and are constantly held against the rotor by springs (not shown).
$3788$LHP,RP$