Crank 1 rotates about fixed axis A. Vane 2 oscillates about fixed axis D. Connecting rod 3 is connected by turning pairs B and C to crank 1 and vane 2. The pump has one chamber a. When crank 1 rotates, vane 2 delivers liqhuid clockwise and separates the suction and discharge chambers. Vane 2 has a check valve (not shown) for the liquid to pass through on the return stroke.
$3809$LHP,RP$