Patent ID: 7175107

Claim:
A multi-function head for high-pressure washing guns, in particular for water cleaning machines, comprising: a tubular first main body exhibiting a rear end, a front end and a conduit for a washing liquid; the conduit extending at least partially along a longitudinal axis from an inlet, afforded at the rear end of the first main body, to an outlet, afforded at the front end of the first main body; the conduit further exhibiting a portion having a narrowed section; a nozzle housed in the conduit of the first main body and exhibiting a passage; an auxiliary body inserted in the conduit of the first main body and exhibiting a passage facing the passage of the nozzle; the auxiliary body exhibiting a frustoconical striker seating for a front end of the nozzle; conveying means interpositioned between the inlet and the portion having the narrowed section for conveying the washing liquid and forming upstream of the nozzle at least a jet which is oblique to the longitudinal axis so as to impress on the nozzle a rotating and conical motion with a vertex in the frustoconical seating; regulating means for trimming the head and moving together the auxiliary body and the nozzle along the longitudinal axis between: a retracted first operating position, in which the auxiliary body is located in the portion having the narrowed section, in order to enable a flow of washing liquid in the passage of the auxiliary body, and the nozzle can move rotatingly and conically in order to obtain a high-pressure rotating jet; an intermediate second operating position, in which the auxiliary body is located in the portion having the narrowed section, in order to enable a flow of washing liquid in the passage of the auxiliary body, and in which the nozzle is blocked in line with the longitudinal axis by means for blocking, for obtaining a high-pressure fixed jet; an advanced third operating position, in which the auxiliary body is uncoupled from the portion having the narrow section, in order to enable passage of the washing liquid around the auxiliary body, and the nozzle is blocked in line with the longitudinal axis of the means for blocking, for obtaining a low-pressure fixed jet.