Unlock instant, AI-driven research and patent intelligence for your innovation.

Piezoelectric pump

a technology of pump and piezoelectric pump, which is applied in the direction of flexible member pump, machine/engine, positive displacement liquid engine, etc., can solve the problem of releasing the fluid contained within the void

Inactive Publication Date: 2007-06-21
GREEN JAMES SPROAT
View PDF13 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present patent describes a piezoelectric material that can be made porous to absorb fluids and change shape when electrically stimulated. This material can be used in a pump to move fluids through a system. The pump can use a secondary fluid to create a pulsating action and act on a mechanical piston or a fluid-filled membrane. The piezoelectric elements can be made to act on each other sequentially, resulting in the release or absorption of fluid as the elements expand or contract. The pump can be used in micro-fluid delivery systems and has flexible elements that contract or expand when electrical voltage is applied or removed. The voids formed during construction of the pump can be used as a fluid transport pathway or channel."

Problems solved by technology

Concomitantly (or subsequently) a change in the size of the contained voids occurs, resulting in the release of the fluid contained within those voids.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Piezoelectric pump
  • Piezoelectric pump
  • Piezoelectric pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Referring to FIG. 1, a fundamental building block of the present disclosure comprises a body, which may take many forms but is preferably a sheet or film of piezoelectric material 101. In the case of a ceramic or porous polymer or plastic structure, the piezoelectric material body may be a block. Electrodes 102 and 104 are mounted on either side of and in contact with the body 101. Insulation elements 103 and 105 insulate the respective electrodes 102 and 104 of each body from similar adjacent assemblies.

[0025] An electric charge passing from or between electrode 102 to 104 excites or energizes the piezoelectric material, therein causing the voids in the body to change their volume. A fluid that is in contact with the piezoelectric body will be drawn into the voids as they increase in volume or the fluid will be expelled as the voids decrease in volume.

[0026] The expansion or contraction of the piezoelectric body (upon application of an electric charge) will depend in large...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method, apparatus and system for a piezoelectric pump wherein the piezoelectric elements is made from a fluid retention material that contains voids that are used to transport fluid from one element of the piezoelectric material to the next in a sequential fashion. The pump can include the use of a secondary fluid that is made to act upon the primary fluid through a piston or membrane.

Description

FIELD OF THE DISCLOSURE [0001] This disclosure pertains to the field of piezoelectric pumps, and, in particular, nonmagnetic piezoelectric pumps which may be implanted inside a living body without causing a later magnetic interaction problem for Magnetic Resonance Imaging (MRI) problem for MRI scans. BACKGROUND OF THE DISCLOSURE [0002] Piezoelectric materials and their various applications have been known in the art for a number of years and their use as a pumping mechanism for fluids are well established. The piezoelectric effect includes the application of a potential electrical difference across a piezo-material, such as a crystal, resulting in the material undergoing a change in size. In one example, each of the elements of a stack of piezoelectric elements deforms with two dimensional extension, accompanied by a thickness deformation that results in the mechanical motion used to move a piston type structure, the piston being used in a conventional manner to move a fluid to be p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F04B17/00
CPCF04B19/006F04B43/0081F04B43/12
Inventor GREEN, JAMES SPROAT
Owner GREEN JAMES SPROAT