US 12,330,177 B2
Dosing device and method of dosing liquid media
Fabian Mittnacht, Ingelfingen (DE); Nathalie Kettemann, Ingelfingen (DE); Matthias Boehringer, Ingelfingen (DE); and Patrick Mohs, Ingelfingen (DE)
Assigned to BUERKERT WERKE GMBH & CO. KG, Ingelfingen (DE)
Filed by BUERKERT WERKE GMBH & CO. KG, Ingelfingen (DE)
Filed on Apr. 12, 2022, as Appl. No. 17/718,997.
Claims priority of application No. 102021109076.8 (DE), filed on Apr. 12, 2021.
Prior Publication US 2022/0323982 A1, Oct. 13, 2022
Int. Cl. B05B 12/08 (2006.01); B05B 12/02 (2006.01)
CPC B05B 12/087 (2013.01) [B05B 12/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A dosing device, comprising:
a dosing tip for dispensing liquid medium; and
at least one pressure vessel with a pressurizing gas, in which an internal pressure can be set by a pressure regulator to a predefined pressure setpoint value, which is an overpressure or a negative pressure relative to an environment of the dosing device,
wherein the internal pressure is set by the pressurizing gas acting on a first liquid medium, a bidirectional flow meter that is designed to measure a quantity of the first medium that is moved by the internal pressure prevailing in the pressure vessel, and a dosing valve located upstream of the dosing tip and designed to enable or disable a flow of the first medium from the flow meter to the dosing tip; and
a control unit connected to the flow meter and the dosing valve, the control unit being adapted to set a switching time interval during which the dosing valve is open, and
to determine, in a dosing process, a deviation of a quantity of first medium moved during the switching time interval from a predefined quantity to be moved and to adapt the switching time interval for a subsequent dosing process.