FLUID DISPENSING DEVICE Russian patent published in 2012 - IPC B05B11/00 

FIELD: packaging.

SUBSTANCE: fluid dispensing device for use with a source of fluid comprises a metering chamber, an outlet for the fluid and a piston element. The element is located with the ability to move with the ability to seal in the metering chamber in the first direction to fill the metering chamber with fluid from the source, and in the second direction for dispensing fluid from the chamber towards the outlet of the fluid. The metering chamber comprises the first and second parts of different widths. The first part is narrower than the second part, and is located in the second direction relative to the second part. The piston element is in constant sealing contact with the second part, when it makes motion in the first and second directions, but is in the sealing contact with the first part only on the part of its motion in the first and second directions.

EFFECT: preventing or reducing the need to fill the device for dispensing the medium for its subsequent use, prevention or prohibition of entering the germs and other contaminants in the bottle, the reservoir of fluid.

26 cl, 72 dwg