AXIAL-PISTON PUMP Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: working chambers of rotatable cylinder bank are provided with working ports 3 for alternative connection with suction and delivery ports 6,7 arranged on both sides of neutral axis 4 of a distributing disk. A make-up unit is mounted on cross-pieces between ports 6,7. The unit includes make-up port 8 coupled with tank 9 through throttle 10. Throttle 10 is made in the distributing disk. Throttle 11 connects tank 9 with port 7. The flowing-section area of throttle 10 is twice flowing- section area of throttle 11. Port 8 is arranged at axis 4. EFFECT: decreased pressure pulsating in make-up line. 2 dwg