Patent ID: 8790092

Claim:
A high-pressure cleaning appliance with a high-pressure pump, comprising: at least one pump chamber which is connected to a suction line and a pressure line, the pressure line being in flow connection with the suction line via a return flow line, and a relief valve in the return flow line, the relief valve comprising: a through-channel extending from a valve inlet to a first valve outlet and forming a valve seat, said first valve outlet forming a leakage opening, at least one outlet channel, which opens into a second valve outlet, branching off from the through-channel downstream of the valve seat, a valve element adapted to be positioned by a return spring in a sealing manner against the valve seat, said valve element being held for movement in the through-channel, wherein: in a direction away from the valve seat, at a distance downstream from the at least one outlet channel, the valve element is surrounded by a first sealing ring which seals off communication between the valve inlet and the first valve outlet, the valve element comprises a closure member which is adapted to be positioned in a sealing manner against the valve seat and a pressure member which is surrounded by the first sealing ring at a spacing from the closure member, the relief valve comprises a first housing part connectable to a second housing part via a second sealing ring disposed therebetween, the second housing part comprises a cup-shaped insert that defines a channel-section of the through-channel and enters the first housing part, the pressure-member extends from the closure member into an area of said channel-section in which the pressure member is surrounded in a circumferential direction by the first sealing ring, a stop is associated with the valve element and the valve element bears on the stop when the relief valve is in an open position, and the stop is formed by a stepped narrowing of the through-channel.