US 12,313,047 B2
Piston pump for a high pressure cleaning device
Robert Nathan, Winnenden (DE)
Assigned to Alfred Kärcher SE & Co. KG, Winnenden (DE)
Filed by Alfred Kärcher SE & Co. KG, Winnenden (DE)
Filed on May 31, 2023, as Appl. No. 18/326,349.
Application 18/326,349 is a continuation of application No. PCT/EP2021/076241, filed on Sep. 23, 2021.
Claims priority of application No. 10 2020 131 798.0 (DE), filed on Dec. 1, 2020.
Prior Publication US 2023/0304480 A1, Sep. 28, 2023
Int. Cl. F04B 1/0452 (2020.01); B08B 3/02 (2006.01); F04B 53/22 (2006.01)
CPC F04B 1/0452 (2013.01) [B08B 3/02 (2013.01); F04B 53/22 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A piston pump for a high pressure cleaning device for conveying a cleaning liquid, having a pump housing, which comprises a first housing part and a second housing part that are each configured as a metal part, wherein the first housing part forms a suction conduit and a pressure conduit, and wherein the second housing part forms a plurality of pump chambers into each of which a reciprocally movable piston dips and which are each in flow connection with the suction conduit by way of an inlet channel and with the pressure conduit by way of an outlet channel, wherein the inlet channels are each closable by an inlet valve and the outlet channels are each closable by an outlet valve, wherein the outlet valves each comprise a stationarily held outlet valve seat and an outlet closing body that is reciprocally displaceable relative to the outlet valve seat and that comprises an outlet valve plate that can sealingly abut against an outlet valve seat, wherein the second housing part comprises a valve receptacle into which the outlet channels open, and wherein the piston pump comprises an outlet valve assembly, which forms all outlet valves, wherein the outlet valve assembly comprises an outlet part, which consists of a plastic material and is inserted into the valve receptacle and forms all outlet valve seats.