PUMP-ACTIVATED MECHANISM FOR PROLONGED SPRAYING OF AEROSOL Russian patent published in 2019 - IPC B05B11/02 

FIELD: spraying.

SUBSTANCE: power unit for obtaining a prolonged release of product from container comprises container cover, made with possibility of attachment to open end of said container, cylindrical barrel configured to be mounted on said container cover, a piston housing reciprocating in said cylindrical barrel, piston retained by said piston housing with possibility of back-and-forth movement together with it, wherein the piston is located in the cylindrical barrel with the possibility of sliding sealing interaction and together with the cylindrical shell defines the pump chamber. Also comprises rotary lead screw extending into said piston housing, drive sleeve, made with possibility of rotation, engagement means located between said drive sleeve and said lead screw, wherein engagement means have an engagement position for turning the lead screw when the drive sleeve is rotated and a disengagement position to enable rotation of the lead screw, which does not lead to rotation of the drive sleeve, first means engaged between the lead screw and the piston housing, and second means engaged between the piston housing and the cylindrical barrel to reciprocate the piston housing and piston in first direction for suction of product into pump chamber when drive bushing and lead screw rotate, power accumulation device configured to accumulate energy when piston housing moves in said first direction, wherein energy storage device displaces piston housing and piston in second direction opposite to first direction for product compression in pump chamber, normally closed valve in fluid communication with pump chamber to control product flow from pump chamber, and a reciprocating drive acting on said valve for its opening and providing product release from pump chamber when said drive is pressed.

EFFECT: power assembly can be used with various energy storage devices such as springs, gases or elastics to exert pressure on product to be dispensed when the actuator is turned.

27 cl, 97 dwg