PUMP WITH CAM DRIVE Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: step cylinder is provided with step plunger to define working and compensation chambers. The ratio of steps of the plunger is 2:1. The step of greater diameter is received in the working chamber. The step of lesser diameter is received in the compensation chamber. The delivery pipe line is coupled with the compensation chamber. The cam mechanism of the plunger drive with twin roller pusher has shaped cam mounted on the driving shaft. The plunger is solid and provided with mutually perpendicular through longitudinal grooves for receiving rollers of the pusher axles of which are secured in the body of plunger, cam, and driving shaft. EFFECT: enhanced efficiency. 1 dwg