Magnetostrictive Chamber Patents (Class 417/322)
  • Patent number: 8197234
    Abstract: An electromagnetic actuator for a microfluidic pump of the type that causes periodic pinching and releasing against the walls of a fluidic channel, e.g., a tube. At least one permanent magnet is placed against the walls of the fluidic channel, and located in an area with magnetic fields, produced by coils that are radially symmetric to the channel. The permanent magnet is cause to press and release against the wall of the fluid channel to cause a fluid flow through the channel.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: June 12, 2012
    Assignee: California Institute of Technology
    Inventors: Morteza Gharib, Derek Rinderknecht, Mladen Barbic
  • Patent number: 8191732
    Abstract: In a waveguide pump and method of pumping liquid, at least a portion of an elongate ultrasonic waveguide is immersed in a liquid reservoir. The waveguide has first and second ends, a nodal region located longitudinally therebetween, and an internal passage extending longitudinally within the waveguide from the first end to a location beyond the nodal region toward the second end of the waveguide. The waveguide also has an inlet at the first end in fluid communication with the internal passage and an outlet in fluid communication with the internal passage and spaced longitudinally from the inlet beyond the nodal region of the waveguide. The immersed portion of the waveguide extends from the inlet to a location that is one of generally longitudinally adjacent, at and beyond the nodal region of the waveguide. The waveguide is ultrasonically excited to cause the waveguide to vibrate at an ultrasonic frequency.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: June 5, 2012
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas David Ehlert, Patrick Sean McNichols
  • Publication number: 20120087809
    Abstract: Disclosed is an embodiment that introduces a novel system to pump fluids, or, gases or, semi-solids, or, solids, from one place to another. Conventionally, a motorized pump systems are used to pump any given fluid from one position to another, nonetheless, in this invention not only a new system of pumping fluids is so introduced, but, existing functions of a conventional motorized pumping systems are saliently augmented by the pipe pump system. The pipe pump functions basically, by a series of electromagnets, that are placed around a flexible and resilient tube, (a rubber tube, for instance), and when these said electromagnet arrangements are actuated, then, that causes the pipe pump to pump out fluids, by squeezing on the fluids, or gases, contained within.
    Type: Application
    Filed: October 7, 2011
    Publication date: April 12, 2012
    Inventors: Ravindra Kashyap, Govind Sahu
  • Patent number: 8133041
    Abstract: A high pressure pump for use in the injection of liquid chemicals into subsea oil or gas wells, and intended to be positioned in the subsea environment adjacent to the wellhead, comprises a piezoelectric actuator (19) for reciprocating a plunger (22) which acts to compress and expand the effective volume of a pumping chamber (29) having a valved inlet (15) connected to a source of the liquid and a valved outlet (16) to lead the liquid to the well. The device has a minimum of moving parts and in particular avoids the need for any rotating parts and attendant high performance bearings and seals.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: March 13, 2012
    Assignee: Qinetiq Limited
    Inventors: Jeremy Leonard Clive Ludlow, Jonathan Geoffrey Gore, Adrian Robert Bowles, Mark Gregory Maylin, Richard Carson McBride, Abdul-Salam Kaddour, Ahmed Yehia Amin Abdel-Rahman
  • Publication number: 20110274566
    Abstract: A magnetically driven micropump for handling small fluid volumes. The micropump includes a first chamber and a second chamber. A flexible membrane being disposed between the first and second chambers. The flexible membrane being magnetically coupled to an actuator for displacing the membrane.
    Type: Application
    Filed: September 30, 2009
    Publication date: November 10, 2011
    Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
    Inventors: Farid Amirouche, Yu Zhou, Matthew Lawrence Cantwell, Johan Citerin
  • Patent number: 7863035
    Abstract: The invention relates to fluidics as used in medical and diagnostic equipment and relates further to means for purifying, abstracting, filtering, detecting and/or measuring analytes in liquid samples.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: January 4, 2011
    Assignee: Osmetech Technology Inc.
    Inventors: Charles E. Clemens, Robert Mucic, Rudolph A. Montalvo, Clark Foster, Gary R. Gust, Thomas P. Robinson, Gary T. Olsen
  • Patent number: 7859168
    Abstract: An actuator housing unit for a system of layered surfaces, comprising an activated primary surface having a physical shape capable of change when activated by an electrical, chemical, or light stimulus, to expand and exert force or pressure or contract and remove force or pressure, upon activation or deactivation, to move or keep matter within the housing by direct or indirect contact.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: December 28, 2010
    Assignee: Medipacs, Inc.
    Inventor: Mark Banister
  • Publication number: 20100254830
    Abstract: A device and method for conducting peristaltic pumping of a fluid in a body is provided. The body includes a channel having an input and an output and being partially defined by a flexible layer. A plurality of contacts are spaced along the layer and the channel is filled with the fluid. The plurality of spaced contacts is magnetically coupled to a magnetic field in sequence so as to translate peristaltic motion to the layer thereby pumping the fluid through the channel.
    Type: Application
    Filed: October 10, 2006
    Publication date: October 7, 2010
    Inventors: David J. Beebe, Ivar Meyvantsson, Dongshin Kim
  • Patent number: 7767266
    Abstract: A method and a system for jetting droplets of viscous medium, such as solder paste, onto a substrate, such as an electronic circuit board. The volume of the droplets are adjusted by regulating the amount of viscous medium that is fed into a jetting nozzle for subsequent jetting of the viscous medium droplets therefrom. The exit velocity of the jetted droplets is adjusted or maintained substantially constant by regulating the velocity with which the viscous medium is impacted. Furthermore, the rate at which viscous medium is fed, for instance by a feed screw, into the nozzle is adjusted in order to regulate the feeding time required for feeding the viscous medium into the jetting nozzle, for instance in order to maintain a constant feeding time.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: August 3, 2010
    Assignee: Mydata Automation AB
    Inventors: William Holm, Kenth Nilsson, Johan Berg, Johan Kronstedt, Håkan Sandell
  • Patent number: 7764499
    Abstract: The present invention discloses a method of confining a liquid metal alloy within a closed-loop system; distributing a first portion of the liquid metal alloy in a cavity within the closed-loop system; turning on an electromagnet to generate a magnetic field to permeate flexible sidewalls of the cavity; attracting the liquid metal alloy in the cavity towards the electromagnet to expand the flexible sidewalls; inducing a second portion of the liquid metal alloy to enter the cavity from an inlet end of a pipe within the closed-loop system; turning off the electromagnet; repelling the liquid metal alloy in the cavity away from the electromagnet to contract the flexible sidewalls; and inducing a third portion of the liquid metal alloy to exit the cavity to an outlet end of the pipe.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: July 27, 2010
    Assignee: Intel Corporation
    Inventors: Ioan Sauciuc, Ravi Mahajan
  • Patent number: 7753656
    Abstract: A magnetohydrodynamic pump for pumping a fluid. The pump includes a microfluidic channel for channeling the fluid, a MHD electrode/magnet system operatively connected to the microfluidic channel, and a system for promoting flow of the fluid in one direction in the microfluidic channel. The pump has uses in the medical and biotechnology industries for blood-cell-separation equipment, biochemical assays, chemical synthesis, genetic analysis, drug screening, an array of antigen-antibody reactions, combinatorial chemistry, drug testing, medical and biological diagnostics, and combinatorial chemistry. The pump also has uses in electrochromatography, surface micromachining, laser ablation, inkjet printers, and mechanical micromilling.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: July 13, 2010
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Asuncion V. Lemoff, Abraham P. Lee
  • Patent number: 7748962
    Abstract: A fluid handling apparatus includes a body, which comprises a fluid handling structure, and a flexible membrane attached to the body and formed to interact with a fluid in the fluid handling structure, wherein the membrane comprises a first actuation component. A second actuation component is provided, wherein the first and the second actuation component are formed such that the same attract or repel each other in a first positional relationship, in order to actuate the flexible membrane. A driving means is provided to move the body relative to the second actuation component, in order to bring the first and the second actuation component into the first and out of the first positional relationship.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: July 6, 2010
    Assignee: Albert-Ludwigs-Universitaet Freiburg
    Inventors: Stefan Haeberle, Jens Ducrée, Roland Zengerle, Norbert Schmitt
  • Patent number: 7695253
    Abstract: A device for pumping and compressing fluids, particularly in micro-liter quantities. First and second polarized cylindrical magnets are mounted in a cylinder with an inlet and an outlet port. The first magnet is adapted to rotate on the axis of the cylinder and has a fixed longitudinal position on that axis. The second magnet is free to move longitudinally but kept from any rotational movement, as a piston in the cylinder. The inlet port is open when the piston magnet is repelled by the rotor magnet's polarity and the outlet is open when the piston magnet is attracted by the rotor magnet's polarity as it rotates.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: April 13, 2010
    Assignee: Honeywell International Inc.
    Inventor: Wei Yang
  • Publication number: 20100068080
    Abstract: An electrical connection structure for use in a micro piezoelectric pump is disclosed. The electrical connection structure includes a driving circuit board and a multilayered wiring structure. The electrical connection structure includes the driving circuit board, the wiring structure, and a piezoelectric element arranged from top to bottom. The driving circuit board is provided with a driving circuit for driving the piezoelectric element and at least an electrical contact, wherein the electrical contacts are electrically connected to the driving circuit. A first electrode contact region and a second electrode contact region electrically insulated from each other are defined on the same surface of the piezoelectric element. The wiring structure sends a signal from the electrical contacts to the first electrode contact region and the second electrode contact region.
    Type: Application
    Filed: December 8, 2008
    Publication date: March 18, 2010
    Applicant: MICROBASE TECHNOLOGY CORP.
    Inventors: Hsien-Kai Meng, Shu-Pin Hsieh, Chieh-Ming Hsiung, Chien-Hua Lin, Yu-Chung Hsu, Tai-Shuan Lin
  • Publication number: 20100012313
    Abstract: According to one or more aspects of the present disclosure, a piezoelectric pump may include a hydraulic fluid path between a low pressure source and a high pressure tool port; a fluid disposed in the hydraulic fluid path; a piston in communication with the fluid; and a piezoelectric material connected to the piston to pump the fluid through the high pressure tool port.
    Type: Application
    Filed: July 17, 2009
    Publication date: January 21, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Colin Longfield, David Wei Wang, Gary L. Rytlewski
  • Patent number: 7631852
    Abstract: A normally closed microvalve includes a fluid inlet, a fluid outlet, a deflectable closing element, which, in the closed state of the microvalve, is seated on a sealing lip, such that the fluid inlet is fluidically disconnected from the fluid outlet, and in the opened state of the microvalve, is spaced apart from the sealing lip, and a deflectable holding structure which is connected to the closing element such that, between the same, a space exists, which is in fluidic communication to the fluid outlet. An influence of a force onto the holding structure and the closing element in a first direction provides an opening-action to the microvalve, while an influence of a force onto the holding structure and the closing element in a second direction provides a closing-action. The fluid inlet and the closing element are arranged such that a pressure at the fluid inlet exerts a force in the second direction.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: December 15, 2009
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Martin Richter, Juergen Kruckow
  • Publication number: 20090232681
    Abstract: Disclosed is an ultrasonic piezoelectric pump in which a piezoelectric pump is integrated with a fluid pipe without a check valve so that the structure can be simplified. The pump includes a fluid pipe having a hollow part formed therein to permit a fluid to flow from a fluid source, a piezoelectric actuator inserted into the hollow part and including a piezoelectric device and a plurality of fluid holes, a controller connected to a lead wire to apply a driving power to the piezoelectric device, and a tapered nozzle inserted into the hollow part in front of the piezoelectric actuator and tapered forward and downwardly.
    Type: Application
    Filed: March 13, 2008
    Publication date: September 17, 2009
    Applicant: Korea Institute of Machinery & Materials
    Inventors: Young-Bog HAM, Jung-Ho Park, Jeong-Dai Jo, So-Nam Yun, Byung-Oh Choi
  • Patent number: 7553135
    Abstract: A diaphragm air pump comprises a pump chamber, a diaphragm and one or more piezoelectric beams or bimorphs. Fluid flows into the pump chamber and then flows out of it, the diaphragm is provided within the pump chamber, and one or more central openings are formed in the diaphragm. One or more central check valves are provided in the central openings. The diaphragm is just bonded with piezoelectric beams, not fixed to the lower housing of the pump chamber in order to get large displacement. With the provided diaphragm air pump, it is possible to actively adjust the air quantity according to the requirement for fuel cell or a part-to-be-cooled, and it is also possible to reduce noise and power consumption compared with a conventional fan type cooler or air pumps.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: June 30, 2009
    Assignees: Samsung Electronics Co., Ltd., Tsinghua University
    Inventors: Hye-jung Cho, Xiaobing Luo, Zhaoying Zhou, Xing Yang, Xiongying Ye
  • Patent number: 7550034
    Abstract: A gas flow generator comprising: an ultrasonic driver comprising a piezoelectric or electrostrictive transducer mounted on a substrate, operation of the transducer being arranged to cause the driver to bend; a first membrane disposed on or formed integrally with the transducer or the substrate; and a second membrane mounted substantially parallel with the driver and spaced a given distance therefrom, one of the membranes being perforate, whereby ultrasonic bending of the driver on actuation of the transducer causes a gas flow through the perforate membrane.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: June 23, 2009
    Assignee: The Technology Partnership PLC
    Inventors: Richard Wilhelm Janse Van Rensburg, Robert Gordon Maurice Selby, Francoise Florence Dufour, Justin Rorke Buckland, John Matthew Somerville
  • Patent number: 7550901
    Abstract: A piezoelectric fan includes a piezoelectric actuator patch (110, 210, 310) and a blade (120, 220, 320) attached to the piezoelectric actuator patch. The blade has a hole (121, 127, 221) in it, and a door (122, 128, 222) is adjacent to the hole and attached to the blade (as with a hinge (123, 129, 223)) such that the door is capable of opening and closing.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: June 23, 2009
    Assignee: Intel Corporation
    Inventors: Gregory M. Chrysler, Ioan Sauciuc
  • Patent number: 7541715
    Abstract: The present invention provides devices and structures and methods of use thereof in electrochemical actuation. This invention provides electrochemical actuators, which are based, inter-alia, on an electric field-driven intercalation or alloying of high-modulus inorganic compounds, which can produce large and reversible volume changes, providing high actuation energy density, high actuation authority and large free strain.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: June 2, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Yet-Ming Chiang, Steven R. Hall, Yukinori Koyama, Kyungyeol Song, E. Timothy Chin, Urs Rhyner, Dimitrios Sapnaras, Fernando Tubilla
  • Patent number: 7539016
    Abstract: The present invention discloses a method of confining a liquid metal alloy within a closed-loop system; distributing a first portion of the liquid metal alloy in a cavity within the closed-loop system; turning on an electromagnet to generate a magnetic field to permeate flexible sidewalls of the cavity; attracting the liquid metal alloy in the cavity towards the electromagnet to expand the flexible sidewalls; inducing a second portion of the liquid metal alloy to enter the cavity from an inlet end of a pipe within the closed-loop system; turning off the electromagnet; repelling the liquid metal alloy in the cavity away from the electromagnet to contract the flexible sidewalls; and inducing a third portion of the liquid metal alloy to exit the cavity to an outlet end of the pipe.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: May 26, 2009
    Assignee: Intel Corporation
    Inventors: Ioan Sauciuc, Ravi Mahajan
  • Publication number: 20090128922
    Abstract: The present invention in various embodiments relates to a variety of different types of fluidic adaptive lens systems, pumping systems for implementation in such lens systems, other systems employing such lens systems, and related methods of fabrication. In at least some embodiments, the present invention relates to a lens system that includes a reservoir having at least one flexible wall, a first actuator coupled in relation to the reservoir, and a terminal at which is located at least one of an integrated fluidic lens and a port configured to be coupled to an external fluidic lens. The terminal is coupled to at least one of the reservoir and the actuator, and at least one of the actuator and a first pumping system including the actuator is capable of causing fluid to be moved at least one of from the reservoir toward the terminal, and from the terminal toward the reservoir.
    Type: Application
    Filed: November 4, 2005
    Publication date: May 21, 2009
    Inventors: Nicole B. Justis, De-Ying Zhang, Yu-Hwa Lo
  • Publication number: 20090129952
    Abstract: A microfluidic device is described. The microfluidic device comprises at least one transport channel and at least one working chamber, wherein the at least one transport channel and the at least one working chamber are separated from each other by a common deformable wall. The at least one transport channel is for containing a transport fluid and the at least one working chamber is for containing a working fluid. The microfluidic device comprises at least one pair of electrodes for changing the pressure on the working fluid such that when the pressure on the working fluid is changed, the deformable wall deforms, resulting in a change of the cross-section of the at least one transport channel. The working chamber comprises a flexible wall different from the common deformable wall and at least one electrode of the at least one pair of electrodes is provided on the flexible wall.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 21, 2009
    Applicant: Stichting IMEC Nederland
    Inventors: Mihai Patrascu, Mercedes Crego Calama, Martijn Goedbloed, Koray Karakaya
  • Publication number: 20090129951
    Abstract: An electrically powered hydraulic actuating system is disclosed. The system includes a pump that has a plurality of electro-magnetically actuated pumping chambers. The plurality of electro-magnetically actuated pumping chambers have a common inlet situated to supply the plurality of electro-magnetically actuated pumping chambers with low-pressure fluid. The plurality of electro-magnetically actuated pumping chambers also have a common outlet situated to receive fluid pressurized by the plurality of electro-magnetically actuated pumping chambers.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 21, 2009
    Inventors: Richard Mark Hyde, Bryan Edward Nelson
  • Publication number: 20090092503
    Abstract: A valve structure includes a valve opening diaphragm and a valve diaphragm. The valve opening diaphragm provides a central valve opening with a plurality of wave shaped projections at the circumference of the valve opening. The valve diaphragm stacks on the valve opening diaphragm and providing at least a pair of elongated circular grooves. The pair of circular grooves is symmetrically disposed with respect to the center of the valve diaphragm and an area enclosed by the pair of circular grooves covers the valve opening.
    Type: Application
    Filed: May 6, 2008
    Publication date: April 9, 2009
    Applicant: MICROBASE TECHNOLOGY CORP.
    Inventors: Hsien-Kai Meng, Shu-Pin Hsien, Chien-Hua Lin, Yu-Chung Hsu, Tai-Hsuan Lin
  • Patent number: 7503756
    Abstract: A positive displacement pump includes a magnetostrictive actuator. A single actuator drives multiple pumping chambers. The pump may include two pumping chambers driven in phase by the linear expansion of the actuator at both its ends. The pump may include a third pumping cavity, driven by the transverse expansion and contraction of the actuator, out of phase with either cavity driven by the lengthwise extension of the actuator. A pump assembly having multiple pumps each including a magnetostrictive element is also disclosed.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: March 17, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Publication number: 20090060760
    Abstract: A diaphragm pump includes: a volume changing member which changes the volume of a fluid chamber; a diaphragm member fixed in a stretched state and arranged separate from the fluid chamber, the diaphragm member having a pair of electrodes and a stretch film formed of dielectric elastomer, and the diaphragm member driving the volume changing member in a forward movement direction; a return bias member which drives the volume changing member in a backward movement direction; and a connection member which connects the diaphragm member and the volume changing member. In a low voltage state, the diaphragm member and the return bias member have driving force with respect to the volume changing member.
    Type: Application
    Filed: August 21, 2008
    Publication date: March 5, 2009
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., HONDA MOTOR CO., LTD.
    Inventors: Hiroaki Ito, Hiroshi Isobe, Tadashi Ishiguro, Kazunobu Hashimoto, Tetsuyoshi Shibata, Hirotomi Nemoto
  • Publication number: 20090053079
    Abstract: The liquid discharging device includes a driving mechanism that drives a needle, a measurement plunger member and an inlet valve members that are concentrically-arranged inside a container. The driving mechanism includes: a piezoelectric-element support plate to which piezoelectric elements are attached; a spring for biasing the piezoelectric-element support plate toward a discharge outlet; and a control device adapted to control the piezoelectric elements separately. The piezoelectric-element support plate includes: a base end to which first end sides of the piezoelectric elements are fixed; a drive unit to which second end sides of the piezoelectric elements are fixed; and a displacement expanding portion expanding and outputting a displacement of the drive unit, the drive unit being displaced in conjunction with a expansion and contraction driving of the piezoelectric elements.
    Type: Application
    Filed: January 23, 2006
    Publication date: February 26, 2009
    Applicant: NEUBERG COMPANY LIMITED
    Inventor: Kenji Ogawa
  • Patent number: 7467752
    Abstract: An electrically-powered fluid sprayer employs a piezoelectric fluid pump that includes an inlet port, an outlet port, a pump chamber, and a piezoelectric element that is deformed and displaced by electrical signals supplied thereto to vary the volume of the pump chamber. Such displacement pumps fluid into the inlet port and into the pump chamber and discharges fluid from the pump chamber out the outlet port. The inlet port is in fluid communication with a fluid reservoir. Spin mechanics may be disposed downstream from the outlet port of the fluid pump and upstream from the discharge nozzle. The piezoelectric fluid sprayer may be extended to include a dual chamber piezoelectric pump that pumps different fluids (e.g., a liquid and air). The output of the dual chamber pump is mixed in a manifold and supplied downstream to the discharge nozzle. Spin mechanics may be employed in the fluid stream upstream from the discharge nozzle after the mixing.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: December 23, 2008
    Assignee: Meadwestvaco Calmar, Inc.
    Inventor: Steven L. Sweeton
  • Publication number: 20080240942
    Abstract: A diaphragm pump for pumping a fluid, includes a flexible diaphragm which contains magnetically hard or soft particles and is actuated by an electromagnetic actuator. The diaphragm pump having a housing having an interior space containing two pump chambers which are separated by the diaphragm, and in that the diaphragm is actuated by two opposite electromagnetic actuators.
    Type: Application
    Filed: March 20, 2008
    Publication date: October 2, 2008
    Applicant: Carl Freudenberg KG
    Inventors: Ralf Heinrich, Dirk Meyer, Thomas Schauber, Christoph Gund, Benno Schmied, Christopher Klatt, Torsten Gerlich, Joerg Bittner, Volker Daume
  • Patent number: 7420659
    Abstract: An apparatus having a disposable cytometer cartridge containing pumps, pressure chambers, reservoirs, flow sensors, flow channels, and microfluidic circuits with fluid operations on the cartridge. The circuits may include mesopumps and mesovalves embedded in the chip, card or cartridge. The apparatus may have multiple detecting, analyzing and identification capabilities of blood or other fluids of interest. The sample to be tested may be entered in the disposable microfluidic cartridge which in turn is insertable in a hand-holdable or portable cytometer instrument. This apparatus may have significant application in biological warfare agent detection, water analyses, environmental checks, hematology, and other clinical and research fields.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: September 2, 2008
    Assignee: Honeywell Interantional Inc.
    Inventors: Cleopatra Cabuz, Eugen Cabuz
  • Patent number: 7397166
    Abstract: A peristaltic pump for conveying a fluid comprises a flexible tube having an outer surface and a lumen for carrying the fluid such as a therapeutic agent. The tube has a length defined by opposed ends of the tube, the outer surface of the body carrying a plurality of longitudinally spaced-apart electroactive polymer actuators. The plurality of actuators are adapted to be responsive to electrical signals for energizing the actuators sequentially along the length of the tube to move a lumen pinch-off along the length of the tube to thereby convey the fluid from one end of the tube to the other end by means of a peristaltic pumping action. The peristaltic pump may be incorporated into a medical lead, such as an endocardial pacing lead, carrying at least one electrode.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: July 8, 2008
    Assignee: Pacesetter, Inc.
    Inventors: Kevin L. Morgan, Anne M. Shelchuk, Jeffery D. Snell, Nils Holmström, John R. Helland
  • Patent number: 7374628
    Abstract: A method for manufacturing a micro pump member, in which a plurality of cells formed in a base part are used as pressurizing chambers, and side walls forming the pressurizing chambers are constructed by piezoelectric/electrostrictive elements. The micro pump member is formed by using a punch and die to form slits through green sheets that are laminated to one another.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: May 20, 2008
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Publication number: 20080085197
    Abstract: A magnetostriction based pump for cooling a power supply is provided. One exemplary embodiment of the invention utilizes one of the components that is already present in the power supply. The expense of the cooling system is minimized, as it is limited to a diaphragm and any channel routing. The airflow can be targeted at multiple devices by adding additional cooling channels or channeling the flow of air over multiple components.
    Type: Application
    Filed: October 9, 2006
    Publication date: April 10, 2008
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Patent number: 7290993
    Abstract: A drive circuit (18) produces a drive signal having a waveform of a predetermined waveform shape for a device (10) having a piezoelectric actuator (14). The drive circuit (14) includes a memory (140) which stores waveform shape data which is utilized by the drive circuit in producing the drive signal. The drive circuit utilizes the waveform shape data so that, for each of plural points comprising a period of the waveform, the drive signal has an appropriate amplitude for the predetermined waveform shape. The waveform shape data has preferably been prepared to optimize one or more operational parameter(s) of the device. Preferably the waveform shape data has been prepared by solving a waveform equation, the waveform equation having coefficients determined to optimize at least one operational parameter of the device.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: November 6, 2007
    Assignee: AdaptivEnergy LLC
    Inventors: Jim Vogeley, Jim Blount, Sanford Jones
  • Patent number: 7287965
    Abstract: A drive circuit (18) produces a drive signal for a pump (10) having a piezoelectric actuator (14), with the piezoelectric actuator (14) forming a part of the drive circuit (18) and serving to shape a waveform of the drive signal. The drive circuit (18) comprises a pulse generator (100) which generates pulses; a converter circuit (102) which receives the pulses and produces charge packets at a rate which equals a desired drive frequency; and, the piezoelectric actuator (14). The piezoelectric actuator (14) receives the charge packets and, by its capacitive nature, integrates the charge packets to shape the waveform of the drive signal. Preferably, the piezoelectric actuator (14) integrates the charge packets to yield a drive field that approximates a sine wave. In one non-limiting example embodiment, the pulse generator (100) comprises a microcontroller-based pulsed width modulator (PWM) circuit (116) and the converter circuit (102) comprises a flyback circuit.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: October 30, 2007
    Assignee: Adaptiv Energy LLC
    Inventors: James Vogeley, Marcel F. C. Schemmann, Sanford Jones
  • Patent number: 7261524
    Abstract: A rotation support has improved thrust-bearing for rotors of electric motors of synchronous pumps. The rotation sup: a stator of the electric motor, in which a hollow body is housed for supporting and containing a permanent magnet rotor, an impeller being kinematically coupled with a shaft of the electric motor, as well as opposite supports of the shaft, one of which is provided with axial thrust-bearing. Advantageously, the support provided with thrust-bearing comprises a bush of antifriction material facing a side of the rotor and which has an axial abutment placed directly in contact with this side of the rotor.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: August 28, 2007
    Assignee: Askoll Holding S.r.l.
    Inventor: Elio Marioni
  • Patent number: 7252178
    Abstract: An acoustic fluid machine such as an air compressor comprises an acoustic resonator, a valve device and a piston. Air is sucked into the resonator through the valve device at one end of the resonator. The piston at the other end of the resonator is reciprocated by an actuator to compress the air in the resonator to cause resonance to increase pressure of the air significantly. The inner surface of the resonator is suitably curved to comply with the formula of a half-period cosine function.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: August 7, 2007
    Assignee: Anest Iwata Corporation
    Inventors: Masaaki Kawahashi, Tamotsu Fujioka, Masayuki Saito
  • Patent number: 7198250
    Abstract: Thin chamber diaphragm-operated fluid handling devices, including thin chamber pumps and thin chamber valves, facilitate device compactness and, in some configurations, self-priming. Diaphragm actuators of the thin chamber devices either comprise or are driven by piezoelectric materials. The thinness of the chamber, in a direction parallel to diaphragm movement, is in some embodiments determined by the size of a perimeter seal member which sits on a floor of a device cavity, and upon which a perimeter (e.g. circumferential or peripheral portion) of the diaphragm actuator sits. The diaphragm actuator is typically retained in a device body between the floor seal member and another seal member between which the perimeter of the actuator is sandwiched. The devices have an input port and an output port.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: April 3, 2007
    Assignee: Par Technologies, LLC
    Inventor: W. Joe East
  • Patent number: 7103949
    Abstract: A method for fabricating a transducer suitable for a fluidic drive for a miniature acoustic-fluidic pump or mixer that includes an acoustic transducer attached to an exterior or interior of a fluidic circuit or reservoir. The transducer converts radio frequency electrical energy into an ultrasonic acoustic wave in a fluid that in turn generates directed fluid motion through the effect of acoustic streaming. The method includes depositing a piezo-electric thin-film onto a platinum coated silicon wafer or substrate with capping electrodes, defining each separate transducer; and dicing said piezoelectric tin-film to provide individual transducers.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: September 12, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jack C. Rife, Michael I. Bell, James Horwitz, Milton N. Kabler
  • Patent number: 7040873
    Abstract: A positive displacement pump includes a magnetostrictive actuator. A single actuator drives multiple pumping chambers. The pump may include two pumping chambers driven in phase by the linear expansion of the actuator at both its ends. The pump may include a third pumping cavity, driven by the transverse expansion and contraction of the actuator, out of phase with either cavity driven by the lengthwise extension of the actuator. A pump assembly having multiple pumps each including a magnetostrictive element is also disclosed.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: May 9, 2006
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Patent number: 6886509
    Abstract: The invention relates to a hydraulic actuator for actuating a gas exchange valve (1) of an internal combustion engine, which valve is especially closed by the effect of a spring. The actuator is configured by a feed pump (6) with intermittent and thus variable delivery. The feed pump (6) has a high frequency and can be equipped for this purpose with piezoelectric, magnetorestrictive and/or electrochemical actuators as the feed elements. Optionally, the feed pump (6) can be operated with a stop valve (7) that is disposed downstream of the gas exchange valve (1) and that is controlled or regulated depending on the feed pump.
    Type: Grant
    Filed: March 16, 2002
    Date of Patent: May 3, 2005
    Assignee: Mahle Ventiltrieb GmbH
    Inventor: Diogenes Perez Cuadro
  • Patent number: 6886331
    Abstract: A magnetohydraulic motor with a positive displacement pump that pumps hydraulic fluid to and from the two sides of a bi-directional piston that provides the motor's output force and motion. Motion control is provided by properly controlling valves that selectively open and close fluid passageways between the actuator member and each side of the piston.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: May 3, 2005
    Assignee: Energen, Inc.
    Inventor: Chandrashekhar H. Joshi
  • Patent number: 6869275
    Abstract: A piezoelectrically driven fluid pump includes a chamber having two opposite sidewalls formed by flexible membranes, and an inlet and an outlet each regulated by a valve. Separate piezo elements are fixed to each of the membranes, to flex the membranes and increase or reduce the chamber volume and thereby draw fluid into the chamber or expel fluid from the chamber. The valves are each formed by two adjacent piezo elements that are supported or flexibly joined together at two opposite ends. When actuated, the valve piezo elements flex outward between the two opposite ends, opening the valve to form an aperture between the two piezo elements. In another embodiment, a fluid pump includes a chamber having one flexible membrane sidewall. A valve-regulated inlet or outlet aperture through the membrane communicates with the pump chamber. A ring-shaped piezo centered around the aperture, on the membrane, flexes the membrane.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: March 22, 2005
    Assignee: Philip Morris USA Inc.
    Inventors: Henry M. Dante, Hector Alonso, A. Clifton Lilly, Jr.
  • Publication number: 20040202554
    Abstract: A micro pump having at least one pump member for conveying a fluid by action of pressure includes a pump unit formed by at least one actuator member for generating a pressure fluctuation and a fluid channel in which the fluid flows. The actuator member is provided with a cell formed by disposing two side walls made of piezoelectric/electrostrictive elements or antiferrodielectric elements on a connecting plate, and covering a surface facing the connecting plate between the side walls with a cover plate. The actuator member selectively forms the fluid channel and generates pressure fluctuation in the fluid channel member due to displacement of the cell caused by expansion/contraction of the side walls. The micro pump is small and thin in size, while attaining increasing fluid ejection amounts, and a high speed in response.
    Type: Application
    Filed: April 30, 2004
    Publication date: October 14, 2004
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Publication number: 20040202548
    Abstract: An exemplary system and method for manufacturing micropump systems having integrated piezoresistive sensors is disclosed as including inter alia: a substrate, an inlet channel, an outlet channel, a pumping cavity, a first valve for permitting fluid flow from the inlet channel to the pumping cavity and restricting backflow of purged fluid from the pumping cavity to the inlet channel; a second valve for permitting fluid flow from the pumping cavity to an outlet channel and restricting backflow of purged fluid from the outlet channel to the pumping cavity; a pump actuator element; a pressure sensing cavity surface capable of at least partial mechanical deformation; a plurality of piezoresistors disposed within the sensing cavity; a plurality of contact pads; a plurality of conductive pathways connecting the piezoresistors and the contact pads; and a substantially monolithic device package, wherein the sensing cavity is substantially contained within the micropump device package.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 14, 2004
    Inventors: Xunhu Dai, Chenggang Xie
  • Patent number: 6767190
    Abstract: Methods and apparatus for electrostatically pumping fluids without passing the fluids through the electric field of the pump are contemplated. Electrostatic forces are preferably used to move the diaphragms in one direction, while elastic and/or other restorative forces are used to move the diaphragms back to their original un-activated positions. In some embodiments, this may allow fluid to be pumped without passing the fluid between actuating electrodes. This may be particularly useful when the fluids have dielectric, conductive, polar or other qualities that may affect traditional electrostatic pump performance. Pumps having various elementary cells are contemplated, including two-celled pumps disposed within a single chamber and pumps having greater numbers of cells wherein each cell is disposed within a different chamber.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: July 27, 2004
    Assignee: Honeywell International Inc.
    Inventors: Eugen I. Cabuz, Cleopatra Cabuz
  • Publication number: 20040141856
    Abstract: A micropump includes a body (10) of semiconductor material, accommodating fluid-tight chambers (32), having an internal preset pressure, lower than atmospheric pressure. The fluid-tight chambers (32), sealed by a diaphragm (35) that can be electrically opened, are selectively openable using a first electrode (37) and second electrodes (38), accommodating between them portions of the diaphragm (35).
    Type: Application
    Filed: September 16, 2003
    Publication date: July 22, 2004
    Applicant: STMicroelectronics S.r.l.
    Inventor: Mario Scurati
  • Publication number: 20040141857
    Abstract: A method for manufacturing a micro pump member, in which a plurality of cells formed in a base part are used as pressurizing chambers, and side walls forming the pressurizing chambers are constructed by piezoelectric/electrostrictive elements. The micro pump member is formed by using a punch and die to form slits through green sheets that are laminated to one another.
    Type: Application
    Filed: January 6, 2004
    Publication date: July 22, 2004
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi