Gun, particularly for crop-spraying

A gun, for crop spraying in particular, comprising a hollow handgrip, a housing including normally-closed sub-vertical spring-loaded ball type on-off valve operated by a lever recessed into the hollow grip, a horizontal rotary control valve with a cylindrical element affording transverse passages that connect an inlet in the grip with two outlet ducts formed in a barrel, one peripheral and incorporating an atomizing means, the other central and discharging freely by way of chamber, said rotary control valve located uppermost in the on-off valve housing and a sleeve with radial openings located beneath a seat of the on-off valve ball, and a diffuser fitted to a downstream end of the barrel;

• wherein the rotary valve element is operated by a relative lever and a butt of the grip affords means of retaining the recessed on-off lever in a stable position, characterized in that the rotary element of the control valve comprises a central section with two sets of holes arranged in crossed formation, said two sets offset through 45.degree. in relation to one another and disposed with their relative axes lying in two parallel vertical and longitudinal planes, of which the one set connects a longitudinal inlet gallery at a side downstream from the on-off valve with a corresponding longitudinal outlet gallery serving the peripheral duct and the atomizing means, and the remaining set connects a longitudinal gallery at the on-off valve side with a corresponding longitudinal outlet gallery serving the freely discharging central duct;
• and in that the element of the control valve is perpetually rotatable and driven by lever-operated means for generating unidirectional angular movement against the action of a torsion spring.