VARIABLE-CAPACITY PISTON PUMP Russian patent published in 1998 - IPC

FIELD: branches of industry where control of volume of working machine is required. SUBSTANCE: pump has at least two pistons forming single volume, two one-throw crankshafts; each crankshaft is kinematically linked with one piston. Crankshafts are connected with swivel hydraulic motor providing for turn of one crankshaft relative to other crankshaft, thus changing operating phases of crankshafts and consequently output of pump. When crankshafts are operating in anti-phase, pump output is maximum and when they are working in similar phase, pump output is equal to zero. EFFECT: simplified construction; compactness; enhanced reliability. 4 dwg