ROTARY PISTON PUMP MECHANISM WITH AUTOMATICALLY VARIABLE DISPLACEMENT

When cylinder block 1 rotates, pistons 2 reciprocate in its cylinders, held by centrifugal force and springs 3 against housing 4. Fluid is drawn in and discharged through bores a and d in stationary shaft 6. Flat spring 5 holds housing 4, turning about fixed axis A, in the position in which the pistons have their maximum stroke and the pump, maximum delivery. When the maximum pressure of the fluid…