Double crank 1 rotates about fixed axis A and is connected by turning pairs B and D to sliders 3 and 6 which reciprocate in guide slots 2 and 5 of rotor 4. Rotor 4 rotates about fixed axis C. When crank 1 rotates, liquid is delivered in the direction of the arrows. Guide slot 5 and slider 6, behind a partition, are shown by dash lines.
$3816$LHP,RP$