Electroosmotic pump

Patent metadata

Field	Value
Publication number	US-11286918-B2
Application number	US-201716326768-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Aug 31, 2016
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

The present invention discloses a path-type liquid medicine delivery electro-osmosis pump that can be applied to a wearable medicine device.An electro osmosis pump according to the present invention includes: a connector provided with a liquid medicine inlet and a liquid medicine outlet; a check valve assembly combined to one side of the connector; and a driver that is connected to the other side of the connector and moves the liquid medicine toward the liquid medicine outlet by applying pressure to the liquid medicine while being separated from the liquid medicine, which passes through the check valve assembly.

First claim

The invention claimed is:

1. An electro osmosis pump comprising:
a connector provided with a liquid medicine inlet and a liquid medicine outlet;
a check valve assembly combined to one side of the connector; and
a driver that is connected to other side of the connector and moves a liquid medicine toward the liquid medicine outlet by applying pressure to the liquid medicine while being separated from the liquid medicine, which passes through the check valve assembly,
wherein the driver comprises:
a first pump housing provided with a space where an operation fluid is received;
a first power supply line that is combined to the first pump housing and receives power;
a first electrode connected to the first power supply line;
a membrane of which one side is combined to the first electrode;
a second electrode combined to other side of the membrane;
a second power supply line that supplies power to the second electrode;
a second pump housing combined to one side of the second electrode and provided with a space where the operation fluid is received; and
a diaphragm combined to the second pump housing,
wherein the first electrode is located between the first power supply line and the membrane, and the second electrode is located between the second power supply line and the membrane,
wherein the first power supply line has a hollow and closed loop shape and is disposed along an edge of the first pump housing,
wherein the second power supply line has a hollow and closed loop shape and is disposed along an edge of the second pump housing, and
wherein an encapsulant is further disposed in a circumferential portion between the first pump housing and the second pump housing so as to form an encapsulation layer that maintains air-tight encapsulation from an outside, wherein the check valve assembly comprises:
a valve housing comprising a liquid medicine inflow extension pipeline being connected to the liquid medicine inlet, and a liquid medicine discharge extension pipeline being connected to the liquid medicine outlet;
an inflow check valve passing the liquid medicine to the liquid medicine inlet;
a discharge check valve passing the liquid medicine in a direction of injection into a human body;
a first fixing hole fixing the inflow check valve to the valve housing; and
a second fixing hole fixing the discharge check valve to the valve housing,
wherein the liquid medicine inflow extension pipeline of the valve housing is disposed between the liquid medicine inlet of the connector and the inflow check valve,
wherein the second fixing hole is disposed between the liquid medicine outlet of the connector and the discharge check valve,
wherein one end of the first fixing hole in an axial direction is inserted and fitted into the liquid medicine inflow extension pipeline of the valve housing and other end of the first fixing hole in the axial direction is exposed to the outside and is not coupled to the connector, and
wherein one end of the second fixing hole in the axial direction is inserted and fitted into the liquid medicine discharge extension pipeline of the valve housing and other end of the second fixing hole in the axial direction is coupled to the connector.

2. The electro osmosis pump of claim 1 , wherein the driver further comprises a first diaphragm that is combined to the connector and blocks the liquid medicine of the check valve assembly, and wherein the diaphragm is a second diaphragm.

3. The electro osmosis pump of claim 2 , wherein the membrane is formed of a porous material through which an operation fluid and ions are transferred.

4. The electro osmosis pump of claim 2 , wherein the membrane is formed of an insulator.

5. The electro osmosis pump of claim 2 , wherein the first diaphragm or the second diaphragm is provided with a wrinkle portion that is formed as protrusions and depressions.

6. The electro osmosis pump of claim 2 , wherein the space of the first pump housing and the space of the second pump housing penetrate along the axial direction, wherein the space of the second pump housing is blocked by the second diaphragm, and wherein the space of the first pump housing is blocked by the first diaphragm.

7. The electro osmosis pump of claim 2 , wherein a space in which the liquid medicine is introduced into through the liquid medicine inlet and discharged through the liquid medicine outlet is formed between the connector and the first diaphragm.

Assignees

• Eoflow Co Ltd

Inventors

• Kim Seung Ha
• Kim Jae Hong
• Kim Jesse Jaejin
• Song Yongchul

Classifications

• F04B19/006 Primary

  Micropumps (F04B43/043 and F04B43/095 take precedence) · CPC title

• F04B19/00

  Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00 · CPC title

• B01L2400/0418

  electro-osmotic flow [EOF] · CPC title

• A61M2039/2433

  Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc · CPC title

• A61M2005/14513

  with secondary fluid driving or regulating the infusion · CPC title