Piston pump, for conveying liquid, comprises a pump piston positioned so that it moves axially backward and forward in a pump bore in a pump housing, and a filter inserted in the pump piston

摘要

Piston pump (10) comprises a pump piston (12) positioned so that it moves axially backward and forward in a pump bore (34) in a pump housing, and a filter (24) inserted in the pump piston for the fluid conveyed by the piston pump. The filter is inserted in a sleeve (14) of the pump piston. The sleeve is provided with holes (46) for the liquid conveyed by the piston pump. The pump piston has a multifunctional part (20) axially protruding from the sleeve of the pump piston and having the filter, a sealing element (28) sealing the pump piston in the pump bore, and a valve seat (32) of a pump valve (68).