Lever 2 turns about fixed axis A and is connected by turning pairs D and B to two connecting rods 5 of equal length, which are connected by turning pairs E and C to pistons 1. Pistons 1 reciprocate in fixed cylinders 6. Pistons 1 are reciprocated by rocking lever 2 manually. This draws in fluid through port a and poppet valves 3, and delivers it through ball discharge valves 4 to discharge port d.
$3976$LHP,FD$