PRODUCT DOSING DEVICE WITH IMPROVED LAUNCH Russian patent published in 2021 - IPC B05B11/00 

FIELD: food industry.

SUBSTANCE: invention relates to a product dosing device. Dosing device (1) of liquid or paste-like dosed product (L) contains connecting element (10) designed for mounting at the open end of vessel (R) containing the dosed product, piston (3) mounted motionless relatively to the connecting element, cylinder case (6), in which the piston is mounted so that dosing chamber (100) is formed between the piston and the cylinder case. The piston contains an upper passage forming an inlet of the dosing chamber, called dosing inlet (35), and the dosing chamber contains an outlet, called dosing outlet (73), the cylinder case is movable with sliding along the piston between the extended position and the retracted position. Inlet non-return valve (5) is mounted on the piston containing inlet membrane (50) having a concave shape. The piston contains first part (30) and second part forming sealing element (40), impaled or formed around the section of the first part. The sealing element strengthens the seal between the piston and one or several sidewalls of the cylinder case. The piston and the inlet non-return valve form separate parts, and they are installed in such a way that: when the cylinder case is stationary or moved to the retracted position, the intake membrane is tightly pressed against the top of the mentioned sealing element, and it closes the dosing inlet. The inlet membrane with the concave shape has the possibility to deform elastically and open the dosing inlet when it is subjected to negative pressure created in the dosing chamber during the movement of the cylinder case to its extended position.

EFFECT: improvement in the launch of the dosing device, namely, when its dosing chamber has small volume.

20 cl, 18 dwg