Patent ID: 6428291
Filing Date: 2002-08-06
Classification: F04B,F04C,F05C

Abstract:
A reciprocating pump for a high pressure cleaning appliance including a pump housing in which there is disposed at least one pumping chamber having an inlet valve, an outlet valve and a reciprocating piston that projects into the pumping chamber, said piston being sealed with respect to said pumping chamber by one or more seals, said pump housing comprising a pump block and a pump head which abut closely together at an interface, wherein at least one of the pumping chambers and connecting conduits penetrate the interface and are sealed in the region of the interface by inserts that are insertable into said at least one of the pumping chambers and the connecting conduits from the interface, said inserts being fixed between the pump block and the pump head when in an inserted position, wherein the inserts themselves and the region of said at least one of the pumping chambers and the connecting conduits in which said inserts are accommodated consists of a thermally softenable synthetic material, and the inserts are connected to a wall of said at least one of the pumping chamber and the connecting conduit in which the inserts are accommodated by means of a welded joint.