SPRAY PUMP

摘要

FIELD: plant treatment and whitening of buildings. SUBSTANCE: double action spray pump with hand drive has stepped-diameter piston mounted within cylinder. Piston has stepped-diameter through opening with axially movable ball and hollow spraying stem with nozzle. Stem end positioned within piston is flattened to restrict movement of ball. Cavities of stem and cylinder are communicated through gap between outer diameter of flattened stem end and cylinder; piston side wall adjacent to gap is provided with openings. Suction branch pipe with spherical return valve is mounted on cylinder end opposite to stem. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation.