Disk 1 rotates about fixed axis B and is connected by turning pair D to slider 2 which reciprocates in slot a of vane 3. Vane 3 turns about fixed axis A. When vane 3 swings to the right, liquid is drawn in from suction input b and is delivered through discharge output c. When vane 3 swings back to the left, liquid passes through a check valve (not shown) in the vane to the discharge chamber at the right of the vane, and suction inlet b is closed by another check valve (not shown) to prevent reverse flow of the liquid.
$3798$LHP,RP$