METHOD OF AND DEVICE FOR LIQUID SPRAYING FROM CONTAINER (VERSIONS) Russian patent published in 1999 - IPC

FIELD: mechanical engineering. SUBSTANCE: pump sprayer connected with container filled with liquid has piston in first cylinder for transfer of definite amount of liquid and is fitted in channel in first piston. Under action of spring sprayer is displaced in position in which spraying hole is usually closed and is shifted in liquid discharge position under action of excess liquid pressure in first chamber. Cylindrical extension to valve member forms channel communicating with liquid in container. It can be separated from valve member for opening intake hole for recharging of first chamber. Second piston moves together with first piston and engages with second cylinder to provide suction at return stroke of pistons. This is used for evacuating fluid remnants from spraying channel delivering handled liquid to nozzle. Fluid remnants from second chamber are returned into container during the following working stroke of pistons. Sprayer is convenient for handling water-based fluid products owing to its self-cleaning properties preventing choking of holes. EFFECT: enlarged operating capabilities. 21 cl, 15 dwg