Patent ID: 8568109

Claim:
Pump for a high-pressure cleaning device for delivering a cleaning fluid, comprising: at least one pump chamber, at least one piston movable back and forth plunging into said pump chamber, said pump chamber being connected to a suction line via at least one inlet valve and to a pressure line via at least one outlet valve, a bypass line leading from the pressure line to the suction line, an overflow valve arranged in said bypass line, a valve body of said overflow valve being connected to a control piston displaceably held in a control chamber and moving the valve body into a closed position or an open position as a function of a flow rate of the cleaning fluid in the pressure line, a rear housing component and a front housing component joined together sealingly in a joining area, the front housing component having a through passage aligned parallel to the pressure line and forming the control chamber, wherein: the control piston divides the control chamber into a high pressure chamber connected to the pressure line upstream of a flow restriction point and a low pressure chamber connected to the pressure line downstream of the flow restriction point, a sliding sleeve is arranged in the control chamber and abuts sealingly on the wall of the control chamber and the control piston is displaceably held in the sliding sleeve with a sealing element interposed between the control piston and the sliding sleeve, the sliding sleeve is insertable into the through passage, the front housing component is provided with a rear-side separating surface which is placed onto a front-side separating surface of the rear housing component, the front housing component is provided with an end side which faces away from the rear housing component, the pressure line proceeds from the rear-side separating surface of the front housing component and extends as far as the end side of the front housing component, and the through passage extends through the front housing component from the end side as far as the rear-side separating surface.