AXIAL-PISTON PUMP Russian patent published in 2001 - IPC

FIELD: hydraulic systems with variable power consumption. SUBSTANCE: pump has housing with suction, delivery and drain lines and cylinder block with pistons resting one inclined plate. Control system includes servopiston and master spool. Filtering element is installed in delivery line and it forms, together with housing, a space communicating with control space of master spool through channel. Filtering element is installed in delivery line coaxially to flow. Reliable operation of pump during entire guaranteed service life is provided owing to continuous cleaning of filtering element from contaminants which are washed off by total flow of working liquid. Invention makes unnecessary replacement and cleaning filtering element. EFFECT: reduced labour input in operation and servicing of pump. 2 cl, 1 dwg