Circular eccentric 1 rotates about fixed axis A, coinciding with the geometric axis of housing 4, and is connected by a turning pair to connecting rod 2 whose collar b encircles eccentric 1. Connecting rod 2 has head a which is connected by a turning pair to slider 3, reciprocating in fixed guides d. When eccentric 1 rotates, collar b slides along the internal surface of housing 4, delivering liquid in the direction of the arrows.
$3841$LHP,RP$