US 12,011,571 B2Granted

Device and method for mixing liquids

AssigneeHeraeus Medical GmbH

InventorsSebastian Vogt, Thomas Kluge

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Abstract

One aspect relates to a device for mixing two liquids including a tube having an open end, a main line connected to the tube in a liquid-permeable manner, a rubber-elastic body delimiting a line wall of the main line, at least one secondary line in the rubber-elastic body, wherein the at least one secondary line extends from at least one secondary opening up to the main line and opens via at least one mouth into the main line, a main connection for introducing a first liquid into the main line, at least one feed line for introducing a second liquid into the at least one secondary line, which is connected to the at least one secondary opening in a liquid-permeable manner. The at least one secondary line is closed in the rubber-elastic body without the action of a force and is hydraulically openable by a pressure being exerted on a second liquid fed to the at least one secondary line by an elastic deformation of the at least one rubber-elastic body. The open at least one secondary line closes without a pressure being exerted on the supplied second liquid by the restoring force of the elastically deformed rubber-elastic body.

Claims23

Dependent claims

A device for mixing small volumes of a first liquid and a second liquid, the device comprising:

a tube having a line cross-sectional area of at most 2 mm2 or having an inner diameter of at most 1.5 mm, wherein the tube has an open end;
a main line connected to the tube in a liquid-permeable manner on a side opposite the open end;
at least one rubber-elastic body, which delimits a line wall of the main line at least in some regions or which delimits the entire main line;
at least one secondary line, which is formed in the at least one rubber-elastic body, wherein the at least one secondary line extends from at least one secondary opening in a surface of the at least one rubber-elastic body up to the main line and opens into the main line via at least one mouth in the at least one rubber-elastic body;
a main connection for introducing the first liquid into the main line;
and
at least one feed line for introducing the second liquid into the at least one secondary line, wherein the at least one feed line is connected to the at least one secondary opening in a liquid-permeable manner;
wherein the at least one secondary line is closed in the at least one rubber-elastic body without the action of a force and is hydraulically openable by a pressure being exerted on the second liquid, supplied to the at least one secondary line, by an elastic deformation of the at least one rubber-elastic body;
and
wherein an open at least one secondary line closes without the pressure being exerted on the supplied second liquid by the force of the elastically deformed at least one rubber-elastic body.

7 more elements

A method for producing a mixture of two liquids, the method comprising the following chronological steps:

A) providing a two-component cartridge having a main reservoir, in which a first liquid is contained, and a secondary reservoir, in which a second liquid is contained;
B) pressing out the first liquid from the main reservoir into a main line and pressing out the second liquid from the secondary reservoir into at least two secondary lines, wherein the at least two secondary lines are closed and formed in at least one rubber-elastic body;
C) opening the at least two secondary lines by elastic deformation of the at least one rubber-elastic body on account of a force exerted by the second liquid and transmitted hydraulically to walls of the at least one secondary line;
D) injecting the second liquid into the first liquid in the main line through a plurality of mutually opposite mouths of the opened at least two secondary lines into the main line, wherein the at least two mouths are arranged on opposite sides of the main line, such that the second liquid injected into the main line through the at least two mouths directly meets in the main line, thereby mixing the first liquid with the second liquid, wherein the flows of the injected second liquid meet in the main line and, as a result, the mixing of the first liquid with the second liquid is promoted;
and
E) pressing out the first and second liquid mixture through a tube connected to the main line.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/324,702Filed 19 May 2021
Priority: EP 2017536519 May 2020
Published: US 2021/0361872 A125 Nov 2021
Granted: 18 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61M 5/284
Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle: comprising means for injection of two or more media, e.g. by mixing
B01F 23/451
Using flow mixing: by injecting one liquid into another
A61B 17/00491
Surgical instruments, devices or methods: surgical glue applicators
A61M 5/19
Syringes: having more than one chamber