Electroosmotic movable device

Patent metadata

Field	Value
Publication number	US-9228676-B2
Application number	US-201414223536-A
Country	US
Kind code	B2
Filing date	Mar 24, 2014
Priority date	Jul 28, 2009
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An electroosmotic movable device is provided, which includes a liquid chamber that houses a liquid, a conductive movable structure that is placed in the liquid chamber and has a rotating shaft or a supporting point and further has a conductive portion, and an electrode for applying an electric field to the conductive movable structure. The conductive movable structure is enabled to move by an electroosmotic flow which occurs in an electric double layer portion formed by being paired with an electric charge induced in the conductive movable structure owing to the electric field which is applied from the electrode.

First claim

What is claimed is:

1. An electroosmotic movable valve comprising:
a channel in which a liquid flows;
a conductive movable structure that is placed in the channel, and has a rotating shaft, such that the placed position of the shaft is shifted from the center of the channel to a width direction of the channel; and
an electrode configured to apply an electric field to the conductive movable structure,
wherein the conductive movable structure is enabled to rotate based on the rotating shaft to regulate the liquid flow by an electroosmotic flow which occurs in an electric double layer portion formed by being paired with electric charges induced in the conductive movable structure owing to the electric field applied from the electrode.

2. An electroosmotic movable valve according to claim 1 , wherein the conductive movable structure in an open state moves into a closed state of the channel by applying the electric field from the electrode.

3. An electroosmotic movable valve according to claim 1 , wherein the conductive movable structure in a closed state moves into an open state of the channel owing to the liquid flow by turning off the electric field from the electrode.

4. An electroosmotic movable valve according to claim 1 , wherein the conductive movable structure has an elliptic shape having a long axis and a short axis.

5. An electroosmotic movable valve according to claim 1 , wherein the shaft is placed at position of (x/w) ranged from (0.47) to (0.49), wherein w denotes a width of the channel and x denotes a located distance of the shaft in a width direction of the channel.

Assignees

• Canon Kk

Inventors

• Sugioka Hideyuki

Classifications

• B01F7/00908

  Operations & Transport · mapped topic

• F16K99/0051

  using electrostatic means · CPC title

• F16K2099/0094

  Micropumps · CPC title

• G01N27/44752

  Controlling the zeta potential, e.g. by wall coatings · CPC title

• B01L3/50273

  characterised by the means or forces applied to move the fluids · CPC title