Granted Patent B2

US 12,667,710 · App. 18/492,692 · Granted Jun 30, 2026

Inventors: Frank Bartels (Hattingen, DE); Jürgen Rawert (Cologne, DE)

A61M39/24A61M5/16881A61M16/208F04B13/00F04B19/006F04B23/02F04B53/10F16K99/0021F16K99/0057A61M11/00A61M2039/2493A61M2202/04B01L3/502738

Abstract

Claims (19)

1 . A valve for a device for administering a liquid medicine, the valve comprising: a valve body which has an inner space for receiving a liquid, wherein the valve body comprises:

a liquid inlet and

an opposite liquid outlet, which both open out into the inner space; and

a plurality of microchannels is arranged in the inner space, said plurality of microchannels extending in the connection direction between the liquid inlet and the liquid outlet;

wherein

the liquid inlet is configured to feed liquid medicine to two or more microchannels of the plurality of microchannels simultaneously; and

the plurality of microchannels comprise: a grid made of parallel, rod-shaped boundary elements or the grid comprises several parallel layers of the parallel, rod-shaped boundary elements that are arranged offset to one another,

in which, a longitudinal length of the parallel, rod-shaped boundary elements that is perpendicular to the connection direction between the liquid inlet and the liquid outlet and extends from an inner side of a side wall bordering the inner space of the valve body in a direction to an opposite side wall, without reaching this, such that a spacing between the parallel, rod-shaped boundary elements and the respectively opposite side wall is formed.

2 . The valve according to claim 1 , in which the microchannels have a diameter between 1 μm and 200 μm.

3 . The valve according to claim 1 , in which the length of the boundary elements is between 20% and 80% of the diameter of the inner space perpendicular to the connection direction between the liquid inlet and the liquid outlet.

4 . The valve according to claim 1 , in which the parallel, rod-shaped boundary elements have a round or a polygonal cross-section.

5 . The valve according to claim 1 , in which the inner space, the liquid inlet and the liquid outlet have the same cross-sectional area perpendicular to the connection direction.

6 . The valve according to claim 4 , in which the valve body has parallel side walls, whose inner sides border the inner space, wherein the side walls open out into the liquid inlet or the liquid outlet on opposite ends.

7 . The valve according to claim 5 , in which the valve body has a constant cross-section across its entire length between the liquid inlet and the liquid outlet.

8 . The valve according to claim 1 , in which the valve body has a round or a polygonal cross-section.

9 . The valve according to claim 1 , in which, to increase the adhesion between the parallel, rod-shaped boundary elements and a liquid, the surface of the boundary elements has a hydrophilic coating.

10 . The valve according to claim 1 , in which the microchannels have a diameter between 5 μm and 20 μm.

11 . The valve according to claim 1 , wherein the inner space and the liquid inlet have the same cross-sectional area perpendicular to the connection direction.

12 . A device for administering a liquid medicine, having a reservoir, in which a medicine is held or can be held, and having a pump, which has a pump chamber, which is fluidically connected to the reservoir via a one-way valve that is only transmissive in a direction from the reservoir into the pump chamber, and that is fluidically connected to a medicine outlet via a valve according to claim 1 .

Assignments (2)

Priority Claims (1)

Continuity (3)

References Cited (45)