SPRAYER WITH COILED SPRING IMPARTING SWIRL MOTION TO LIQUID Russian patent published in 1998 - IPC

FIELD: spraying devices. SUBSTANCE: coiled spring of sprayer is made with possibility of applying effort to rod for moving it from nozzle of sprayer towards stop. Rod is mounted with possibility of axial motion in direction of cylindrical duct in accordance with effort of coiled spring and liquid pressure acting upon rod. Spring rests by its one end upon rod flange whose diameter is less than that of cylindrical duct in body of sprayer, for providing pressure difference along annular passage between flange and wall of passage in order to create force acting in direction opposite relative to spring effort. Rod has cone protrusion restricting together with body of sprayer annular passage and providing possibility of closing supply duct at predetermined pressure value. Movement of rod by means of spring is limited by wall of cone swirl chamber. Other end of spring rests upon rod portion in the form of plunger. Rod includes axial duct and end surface with large number of inclined grooves closely abutting to wall of swirl chamber. Inlet opening of spraying head may be subjected to very high pressure, for example to shock waves, without deterioration of its envelope. Liquid is strongly swirled before it is sprayed out of sprayer nozzle. EFFECT: improved design. 10 cl, 13 dwg