Upon rotation of camshaft 1, rigidly mounted cam 2 oscillates lever 3 about fixed axis B. Through lever 4 and rod 5, this motion lowers diaphragm 6. When the diaphragm moves downward, a vacuum is created in chamber a, and gasoline is drawn in through channel d and inlet check valve 7. In further rotation of cam 2, spring 8 raises diaphragm 6. At this, inlet valve 7 closes, discharge check valve 9 opens, and the gasoline is delivered under pressure to channel b. Lever 10, turning about fixed axis D, turns lever 4 about axis A and serves for pumping fuel manually.
$4120$EHP,RP$