PRECISION-CALIBRATED CHECK VALVE FOR MICROFLUIDIC SYSTEMS Russian patent published in 2024 - IPC F04B53/10 G01N35/10 F16K15/14 F16K51/00 

FIELD: microfluidic systems; measurement.

SUBSTANCE: invention relates to microfluidic systems, in particular to precision-calibrated check valves, manufactured by DLP-printing method for use as microfluidic devices in research systems of “laboratory on a chip” type for investigation of chemical reactions. Precision-calibrated check valve for microfluidic systems contains upper and lower elements connected together and obtained by method of 3D-printing from resin of monomers capable of polymerisation during UV-radiation. Each of the elements is made in the form of a cylinder with a through axial channel. In this case, the lower element in its upper part is made with a movable locking element in the form of a plate mounted on the corresponding deformable elements, which are made in the form of flexible arc-shaped elements bent by the arch hump towards the longitudinal axis of the valve. Upper element in its lower part is made with a cavity repeating the shape of the above movable locking element. Surface of said movable locking element and surface of said recess are conical.

EFFECT: check valve provides higher accuracy of fluid pressure values (fluid flow values).

3 cl, 3 dwg