Electroosmotic pump

Patent metadata

Field	Value
Publication number	US-12090299-B2
Application number	US-201917269711-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Aug 20, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

Provided is an electroosmotic pump including a housing including a shaft hole, a membrane disposed between a first space arranged in a direction away from the shaft hole and a second space adjacent to the shaft hole, a first electrode body and a second electrode body arranged at opposite sides based on the membrane, a shaft extending to an outside of the housing through the shaft hole, and a first fluid included in an internal space of the housing.

First claim

What is claimed is:

1. An electroosmotic pump comprising:
a housing including a shaft hole;
a membrane disposed between a first space arranged in a direction away from the shaft hole and a second space adjacent to the shaft hole;
a first electrode body and a second electrode body arranged at opposite sides of the membrane;
a shaft extending to an outside of the housing through the shaft hole; and
a first fluid included in an internal space of the housing,
wherein the shaft is configured to reciprocate in a first direction from the first space to the second space and in a second direction opposite to the first direction.

2. The electroosmotic pump of claim 1 , wherein a volume of the first fluid is less than a volume of the internal space.

3. The electroosmotic pump of claim 1 , wherein the first fluid is provided in each of the first space and the second space, and a volume of the first fluid in the first space is less than a volume of the first space.

4. The electroosmotic pump of claim 3 , wherein the first space includes a first sub-space occupied by the first fluid and a second sub-space, and a reciprocating movement of the shaft varies according to a ratio of a volume of the second sub-space to the volume of the first space.

5. The electroosmotic pump of claim 4 , further comprising a second fluid occupying the second sub-space, wherein the first fluid is a liquid and the second fluid is a gas.

6. The electroosmotic pump of claim 5 , wherein the housing includes a hole connected to the first space, and the hole is spatially separated from an outer space of the housing by a breathable film.

7. An electroosmotic pump comprising:
a housing including a shaft hole in a side thereof;
a shaft extending to an outside of the housing through the shaft hole;
a membrane arranged in an internal space that is defined by an inner surface of the housing and the shaft;
a first electrode body arranged at a first side of the membrane;
a second electrode body arranged at a second side of the membrane, wherein the second side is opposite to the first side; and
a fluid accommodated in the internal space, wherein the internal space includes a first space and a second space at opposite sides of the membrane, the fluid includes a first fluid in the first space, and a volume of the first fluid in the first space is less than a volume of the first space, and_wherein the shaft is configured to reciprocate in a first direction from the first space to the second space and in a second direction opposite to the first direction, and a reciprocation of the shaft is dependent on a flow of the fluid between the first space and the second space.

8. The electroosmotic pump of claim 7 , wherein the first space is located far from the shaft such that the membrane is provided therebetween.

Assignees

• Eoflow Co Ltd

Inventors

• Kim Jesse Jae Jin
• Song Yong Chul
• Kim Seung Ha
• Park Dae Jong

Classifications

• A61M5/14224 Primary

  Diaphragm type · CPC title

• A61M5/14216 Primary

  Reciprocating piston type · 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

• F04B9/08

  the means being fluid · CPC title

• F04B43/02

  having plate-like flexible members, e.g. diaphragms (F04B43/14 takes precedence) · CPC title