Liquid Valves Patents (Class 137/251.1)
  • Patent number: 9677121
    Abstract: A microfluidic processing device includes a substrate defining a microfluidic network. The substrate is in thermal communication with a plurality of N independently controllable components and a plurality of input output contacts for connecting the substrate to an external controller. Each component has at least two terminals. Each terminal is in electrical communication with at least one contact. The number of contacts required to independently control the N components is substantially less than the total number of terminals. Upon actuation, the components typically heat a portion of the microfluidic network and/or sense a temperature thereof.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: June 13, 2017
    Assignee: HandyLab, Inc.
    Inventors: Karthik Ganesan, Kalyan Handique
  • Patent number: 9562262
    Abstract: A fluidic centripetal apparatus for testing components of a biological material in a fluid is presented. A bottom-fillable chamber is coupled to an entry channel for receiving the fluid, the chamber inlet being provided at an outer side of the bottom-fillable chamber. A container is wholly provided in a retention chamber and contains a liquid diluent, until it releases it upon application of an external force, restoring the fluidic connection between the liquid diluent and the fluid in the retention chamber. The retention chamber can have a flow decoupling receptacle for receiving the fluid, located at the outer side of the retention chamber and interrupting a fluidic connection between the entry and exit of the retention chamber. A test apparatus and a testing method using a fluidic centripetal device for testing components of a biological material in a fluid are also provided.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: February 7, 2017
    Assignees: Université Laval, Genepoc Inc.
    Inventors: Régis Peytavi, Sébastien Chapdelaine
  • Patent number: 9453552
    Abstract: Embodiments of an adaptive three parameter isolator assembly are provided, as are embodiments of a spacecraft isolation system including a plurality of isolator assemblies. In one embodiment, the isolator assembly includes a three parameter isolator having opposing hydraulic chambers configured to be filled with a Magneto-Rheological (MR) damping fluid. An MR valve external to the three parameter isolator is fluidly coupled between the opposing hydraulic chambers. The MR valve is configured to generate a magnetic field through which the MR damping fluid passes as the fluid flows between the opposing hydraulic chambers. A control device is operably coupled to the MR valve and is configured to control the strength of the magnetic field to adjust the viscosity of the MR damping fluid during operation of the three parameter isolator.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: September 27, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Jiri Tosovsky, Vlastimil Janulik, Dale Thomas Ruebsamen
  • Patent number: 9169716
    Abstract: Certain aspects of the present invention are directed to a liquid valve assembly that can be disposed in a wellbore through a fluid-producing formation. The liquid valve assembly can include a housing and a liquid valve. The housing can define an inner chamber and an opening adapted to allow fluid to flow between the inner chamber and a passageway. The liquid valve can be disposed in the inner chamber. The liquid valve can include a yield stress fluid. The yield stress fluid can prevent fluid from flowing between the inner chamber and the passageway.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: October 27, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael Linley Fripp, Luke William Holderman, Jean-Marc Lopez, Liang Zhao
  • Publication number: 20150102030
    Abstract: A multi-layer one-way valve (100) includes: a first layer (10) having at least one first opening (12) formed therein; a second layer (20) having at least one second opening (22) formed therein; and, a third layer (30). The first and second layers are joined together such that at least one first channel (14) is defined therebetween, and the second and third layers are joined together such that at least one second channel (24) is defined therebetween. Additionally, an amount of flow-able liquid is deposited in the first channel between the first and second openings. Suitably, the valve selectively opens to permit gas flow through the first and second channels in response to a pressure differential, the rate of gas flow through the valve is exponentially proportional to the pressure differential.
    Type: Application
    Filed: July 16, 2012
    Publication date: April 16, 2015
    Applicant: CCL Label, Inc.
    Inventors: David Gardner, Anne Shim
  • Patent number: 8931501
    Abstract: An apparatus for controlling flow in a fluid flow path can include a chamber containing an expandable material, the expandable material being configured to expand out of the chamber into a portion of the fluid flow path so as to at least partially block the fluid flow path. The apparatus also can include at least one structure providing flow communication between the chamber and the fluid flow path. The at least one structure can be configured to pass the expandable material from the chamber to the portion of the fluid flow path during expansion so as to control a rate at which the expandable material expands into the portion of the fluid flow path.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: January 13, 2015
    Assignee: Applied Biosystems, LLC
    Inventors: James C. Nurse, John R. Van Camp
  • Patent number: 8851103
    Abstract: The present disclosure provides a mini-scale microfluidic valve including a valve housing disposed at a fluid dispensing orifice of a mini-scale microfluidic system dispensing nozzle. The valve housing comprises a base member having a base member orifice that aligns with the fluid dispensing orifice to provide a fluid dispensing pathway through which a system-fluid is dispensed from the system dispensing nozzle to an external ambient environment. The housing additionally comprises an open valve channel exposed to the external ambient environment and intersecting the fluid dispensing pathway. The valve further includes a liquid-film movably disposed within the open valve channel such that the liquid-film is exposed to the external ambient environment. The liquid-film comprises a substantially non-volatile, immiscible liquid, and a valve control subsystem structured and operable to control movement of the liquid-film within the open valve channel to selectively cover and uncover the base member orifice.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: October 7, 2014
    Assignee: The Curators of the University of Missouri
    Inventor: Jae Wan Kwon
  • Patent number: 8813774
    Abstract: A method for sealing a drain by pouring a chemical sealant comprising ethylene oxide/propylene oxide block co-polymer into the drain trap in a sufficient quantity to displace any existing fluid in the drain with the sealant and allowing the sealant to remain in the drain trap. The sealant will not evaporate (significantly if at all), and will provide a seal, for a period of at least twelve months. The sealant may be removed and the drain opened by flushing with water.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: August 26, 2014
    Inventor: Jay K. Porter
  • Publication number: 20140116522
    Abstract: A fluid conduit arrangement includes a reservoir containing a pressurized gas therein. An outer rigid conduit in communication with the reservoir contains a first working fluid under pressure from the pressurized gas within a dosed system defined by the reservoir and the outer rigid conduit. An inner flexible conduit is provided for conducting a second working fluid therethrough upon application of a supply pressure. The inner flexible conduit is disposed within the outer rigid conduit, and is subjected to the pressurized first working fluid in surrounding relationship therewith. Relative differences between the pressurized first working fluid and the second working fluid enable the inner flexible conduit to either expand and permit free flow of the second working fluid therethrough, or collapse and evacuate flow of the second working fluid therefrom.
    Type: Application
    Filed: October 22, 2013
    Publication date: May 1, 2014
    Applicant: Hartmann Controls, Inc.
    Inventors: Henry Guenther, Mark Blumreiter
  • Patent number: 8701553
    Abstract: A valve system for a container or vat, such as a food cooking vat. The valve system includes a valve body and stem having a valve head with a sealing member. The valve body has an outlet configured to be in fluid communication with the vat, and the sealing member is in fluid communication with the outlet and the chamber and is selectively operable between a discharge position, allowing the vat's contents to drain from the chamber, and a closed position, allowing the contents to remain in the chamber. The sealing member preferably is comprised of polymer and has an O-type sealing ring interposed between a first portion and a second portion, where the diameter of the second portion is smaller than the diameter of the first portion. Embodiments may also include a snap-fit connection of the sealing member to the valve head.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: April 22, 2014
    Inventor: James H. McCarter
  • Patent number: 8607813
    Abstract: A method and apparatus are provided for reducing the oxygen content drawn from the atmosphere that enters the insulating fluid-containing expansion vessel of high-voltage systems. The apparatus is provided with inner and outer tanks that include a liquid that provides a diffusion barrier for capturing oxygen from the atmosphere. The tanks are in communication with the atmosphere on one side of the barrier and in communication with the expansion vessel on the other side of the barrier. Further provided is a moisture-capturing dehumidifier upstream of the diffusion barrier to dry the gas passing into the expansion vessel. The apparatus limits degradation of the insulation system caused by moisture and oxygen, thereby increasing the life span of the high-voltage system.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: December 17, 2013
    Assignee: GATRON GmbH
    Inventor: Eckhard Braesel
  • Patent number: 8578963
    Abstract: In a nonreturn valve having a tubular body, which can be installed in a vertical section of an exhaust line, a valve seat, formed within the tubular body, for at least one float, and at least one circumferential groove, which is open in the downstream direction, the intention is to make available a solution by means of which it is possible to provide a nonreturn valve that is simple, advantageous in terms of production engineering and has a particularly high performance, and to do so in a way which is simple in terms of design and is economical. This is achieved by virtue of the fact that the circumferential rim of the at least one float projects radially over the radially inner circumferential wall section and has an axial lip facing upstream, which extends into the circumferential groove in the axial direction when the at least one float is resting on the valve seat.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: November 12, 2013
    Assignee: Centrotherm Systemtechnik Gmbh
    Inventor: Hans-Jürgen Richter
  • Patent number: 8490655
    Abstract: A normally open valve unit to close a channel, a microfluidic device equipped with the same, and a method of driving the valve unit are provided. The valve unit includes a valve substance including a phase transition material, a valve substance chamber which communicates with the channel and in which the valve substance is disposed, and a fusion structure formed in a section of the channel in which, wherein when the valve substance contained in the valve substance chamber is fused by applied energy and flows into the section of the channel in which the fusion structure is formed, and the valve substance is heated to melt the fusion structure and conduct fused bonding of the channel, thereby closing the channel.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: July 23, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong Myeon Park, Do Gyoon Kim, Sang Bum Park
  • Patent number: 8333213
    Abstract: A valve system for attachment to a food cooking vat. The valve system includes a valve body and stem, with the stem including a valve head having a sealing member connected thereto. The valve body has an outlet configured to be in fluid communication with the food cooking vat, and the sealing member is in fluid communication with the outlet and the chamber and is selectively operable between a discharge position, for allowing the food to drain from the chamber, and a closed position, for allowing the food to remain in the chamber. The sealing member preferably includes polymer and has a first portion of generally frusto-conical shape and a second portion of generally frusto-conical shape generally co-axial with the first portion.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: December 18, 2012
    Inventor: James H. McCarter
  • Patent number: 8202080
    Abstract: A blow molding machine having the valves integrated into the valve block is disclosed. The valve pistons form annular rings stacked vertically along the stretch rod axis. The valve pistons activate by moving up/down along the stretch rod axis. The valve seat for each vertically stacked valve is formed radially around the stretch rod.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: June 19, 2012
    Assignees: Norgren GmbH, KHS Corpoplast GmbH & Co. KG
    Inventors: Mathias Keller, Daniel Abderhalden, Philipp Boos
  • Patent number: 8181666
    Abstract: A switch valve having a long span of life is provided. The switch valve 70 of the present invention has a low-melting-point metal 76 having a surface on which a blocking member contacts, with the low-melting-point metal 76 melted, thereby a closed state appears in which an inner space of the switch valve 70 is split up into an inner space and an outer space of the blocking member 72. When the inner space and the outer space of the blocking member 72 are connected in the inner space of the switch valve 70, outside devices are blocked from each other in the closed state. The outside devices are connected to each other in an opened state in which the lower end of the blocking member 72 is spaced away from the low-melting-point metal 76.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: May 22, 2012
    Assignee: Ulvac, Inc.
    Inventors: Toshio Negishi, Tatsuhiko Koshida
  • Patent number: 8156957
    Abstract: A system, including a closed chamber (20) having a gas inlet (22) and a gas outlet (24) is shown and described. An inert gas supply under positive pressure is connected to the gas inlet, and a bubbler is connected to the gas outlet. The bubbler includes a compartment that is partially filled with liquid so as to define a head space, an inlet operatively connected to the gas outlet, a vent, and a vacuum line in fluid communication with the head space so that the head space has a negative pressure.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: April 17, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Christopher William Newton
  • Patent number: 7967599
    Abstract: A blow molding machine having the valves integrated into the valve block (100) is disclosed. The valve pistons (110) form annular rings stacked vertically along the stretch rod (104) axis. The valve pistons activate by moving up/down along the stretch rod axis. The valve seat for each vertically stacked valve is formed radially around the stretch rod.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: June 28, 2011
    Assignees: Norgren GmbH, KHS Corpoplast GmbH & Co. KG
    Inventors: Mathias Keller, Daniel Abderhalden, Phillipp Boos
  • Patent number: 7921646
    Abstract: A turbocharger is disclosed that includes a compressor, a turbine connected to the compressor by a mechanical shaft, and a fluidic drain valve in flow communication with an air bleed port of the compressor and an exhaust plenum to drain water accumulated inside the turbocharger such that water accumulated in the exhaust plenum is drained during shutdown when no air from the bleed port flows through the fluidic drain valve.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: April 12, 2011
    Assignee: General Electric Company
    Inventors: Kendall Roger Swenson, Anthony Holmes Furman, Peter Galie, Lukas Johnson
  • Patent number: 7874305
    Abstract: Provided is a microvalve having a magnetic wax plug which includes a micro fluidic structure having an inlet portion and an outlet portion, a magnetic wax plug provided at a predetermined section where the inlet portion and the outlet portion meet, existing in a solid state, melted at a temperature higher than a predetermined temperature, and reversibly moving along a magnetic field, so as to control flux of a fluid through the micro fluidic structure, a heating portion provided corresponding to the section and heating the magnetic wax plug to be melted, and a magnetic field application portion selectively applying a magnetic field to a position where the melted magnetic wax plug arrives.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: January 25, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-wook Oh, Kak Namkoong, Chin-sung Park
  • Patent number: 7866954
    Abstract: Disclosed herein are a valve and a micro fluid pump having the same. The valve is mounted in a micro fluid pump having a capillary tube, to which a gas supply unit and a fluid transfer pipe are connected, for controlling the introduction and the discharge of fluid. The valve includes a discharge pipe filled with liquid such that the discharge pipe has a predetermined resistance pressure and constructed in a structure in which one end of the discharge pipe is connected to the capillary tube such that the discharge pipe communicates with the interior of the capillary tube, and the other end of the discharge pipe is open, thereby allowing gas out of the capillary tube through the discharge pipe when a gas pressure in the capillary tube exceeds the resistance pressure of the discharge pipe.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: January 11, 2011
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Duck-jong Kim, Yun-wook Hwang, Yu-chang Kim, Sang-jin Park, Pil-woo Heo, Eui-soo Yoon, Deuk-yong Koh
  • Patent number: 7841190
    Abstract: Methods and devices for the management of cryogenic agents within analytical systems using freeze thaw valving having an expansion chamber that limits the flow of the cryogenic agent. The expansion chamber is fitted with an expansion nozzle through which a cryogen flows and a porous frit that allows the cryogen to be exhausted. The porous frit initially allows a rapid flow of cryogen into the expansion chamber. This rapid flow lowers the temperature of the expansion chamber causing fluid contents within a freeze thaw segment to freeze. As the cryogen expands into the expansion chamber and turns into a solid, the porous frit is occluded causing the rapid flow to be restricted. The restriction of the cryogen flow by the occlusion of the porous frit allows the freeze thaw valve to use significantly less cryogen. Sublimation of the cryogen trapped within the porous frit provides sufficient cooling to maintain the valve in its closed position.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: November 30, 2010
    Assignee: Waters Technologies Corporation
    Inventors: Geoff C. Gerhardt, Theodore Dourdeville
  • Patent number: 7837948
    Abstract: A phase transition type valve is provided. The valve includes a phase transition material filled and hardened in a section of a channel and a tube expanding region which has a larger cross-sectional area than the channel formed at both ends of the section in which the phase transition material is hardened.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: November 23, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jong-myeon Park
  • Publication number: 20100064891
    Abstract: Aspects include a valve comprising a flowing liquid, operable to control a flow of gas through a port. Certain aspects include reaction chambers operable to react gases, and in some aspects gases are substantially contained within an envelope comprised of a flowing liquid. Certain embodiments control gas entrance into a chamber with a valve comprised of a flowing liquid controlling gas flow through a port. Various gas scrubbing systems are described, including systems comprising reaction chambers operable to react gases that yield substantial amounts of solid reaction products. Methods for controlling gas flow are disclosed. Systems and methods include sequential steps of wet-scrubbing, reacting and further wet-scrubbing a gas stream.
    Type: Application
    Filed: September 17, 2008
    Publication date: March 18, 2010
    Inventor: Mark Johnsgard
  • Patent number: 7661436
    Abstract: The liquid seal according to the present invention consists of a U-tube (1, 2) having one arm (1) connected to the pipe (8) collecting all the gas vented from across the plant and other arm (2) connected to a liquid holder (5). A pipe (6) provided at the top of the liquid holder (5) is connected to the gas pipe (9) leading to the flare while there is a pipe (4) at the bottom of the said liquid holder fitted with a non-return valve (10) connecting to the bottom of U-tube (1, 2). There is provided a drain pipe (3) at the bottom U-tube (1, 2) to drain out the liquid if needed.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: February 16, 2010
    Inventor: Padam Singh
  • Patent number: 7478792
    Abstract: Provided is a microvalve having a magnetic wax plug which includes a micro fluidic structure having an inlet portion and an outlet portion, a magnetic wax plug provided at a predetermined section where the inlet portion and the outlet portion meet, existing in a solid state, melted at a temperature higher than a predetermined temperature, and reversibly moving along a magnetic field, so as to control flux of a fluid through the micro fluidic structure, a heating portion provided corresponding to the section and heating the magnetic wax plug to be melted, and a magnetic field application portion selectively applying a magnetic field to a position where the melted magnetic wax plug arrives.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: January 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-wook Oh, Kak Namkoong, Chin-sung Park
  • Publication number: 20080303691
    Abstract: A fluid dispensing control system comprising a plurality of hybrid fluid dispensing units and hybrid keypads are capable of both wired and wireless communication with a billing computer.
    Type: Application
    Filed: June 7, 2007
    Publication date: December 11, 2008
    Applicant: LINCOLN INDUSTRIAL CORPORATION
    Inventor: Eric Krassinger
  • Publication number: 20080112855
    Abstract: Provided are a valve unit and a microfluidic device including the valve unit. The valve unit includes: a valve substance container containing a valve substance, the valve substance including a phase change material that is solid at ambient temperature and melts by absorbing energy; a valve connection path connecting the valve substance container to a channel forming a fluid passage; and a pair of drain chambers formed along the channel at both sides of the valve connection path.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 15, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Beom-seok Lee, Yoon-kyoung Cho, Jeong-gun Lee, Jong-myeon Park
  • Patent number: 7329535
    Abstract: Provided are an apparatus for circulating a carrier fluid having two or more chambers or sections, an apparatus for amplifying a nucleic acid using the same, and a chip containing the same. The apparatus for circulating a carrier fluid includes two or more chambers maintained at different temperatures, each chamber having an inlet valve containing a pneumatic air pressure port for controlling inflow of the carrier fluid to the chamber (inlet pneumatic air pressure port), and an outlet valve containing a pneumatic air pressure for controlling outflow of the carrier fluid from the chamber (outlet pneumatic air pressure port), wherein the chambers are sequentially connected such that the outlet valve of one chamber is connected to the inlet valve of an adjacent chamber in a direction the fluid flows.
    Type: Grant
    Filed: November 11, 2002
    Date of Patent: February 12, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-wook Oh, Geun-bae Lim, Young-sun Lee, Yoon-kyoung Cho
  • Patent number: 7204264
    Abstract: A freeze-thaw valve and a method of micro-machining the freeze-thaw valve is provided and includes a valve housing, wherein the valve housing defines a housing cavity and includes a housing inlet, a housing vent, a capillary tubing inlet and a capillary tubing outlet. A valve body is provided, at least a portion of which is lithographically constructed, wherein the valve body includes a refrigerant inlet, a refrigerant outlet and an expansion chamber. The expansion chamber is disposed to communicate the refrigerant inlet with the refrigerant outlet and includes a restriction region having a flow restriction. Additionally, the valve body is disposed within the housing cavity to form an insulating channel between the valve housing and the valve body.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 17, 2007
    Assignee: Waters Investments Ltd.
    Inventors: Robert W. Crocker, Pamela F. Caton, Geoff C. Gerhardt
  • Patent number: 7195036
    Abstract: The movement and mixing of microdroplets through microchannels is described employing silicon-based microscale devices, comprising microdroplet transport channels, reaction regions, electrophoresis modules, and radiation detectors. The discrete droplets are differentially heated and propelled through etched channels. Electronic components are fabricated on the same substrate material, allowing sensors and controlling circuitry to be incorporated in the same device.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: March 27, 2007
    Assignee: The Regents of the University of Michigan
    Inventors: Mark A. Burns, Rohit Pal
  • Patent number: 7077154
    Abstract: Apparatus for effecting bubble CPAP. The apparatus includes a hollow vessel holding a liquid, a cap, and a positionable tube assembly. The positionable tube assembly comprises a guide tube and a positionable tube. The positionable tube is arranged to have a gas introduced through it and is located within the guide tube. The positionable tube is arranged to be slid to various discrete longitudinal positions with respect to the guide tube and to be held in any one of those discrete positions against accidental displacement so that the lower free end of the positionable tube is held at a desired position below the surface of the liquid.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: July 18, 2006
    Inventors: Harris C. Jacobs, Louis S. DeMichiel
  • Patent number: 6973938
    Abstract: A pressure and vacuum vent utilizing a column of liquid to open and close the vent at predetermined pressure and vacuum levels. A column of liquid is constrained in connection with internal and external passages coupled between a pair of expansion chambers. The external passage is sized to hold a level of liquid corresponding to a predetermined positive pressure level at which the valve will open, while the internal passage is sized to hold a level of liquid corresponding to a predetermined negative pressure level at which the valve will open. At either the predetermined positive or negative pressure level, the valve opens when sufficient liquid has exited either the external or internal passage to permit the flow of a restrained gas past the liquid column.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: December 13, 2005
    Assignee: Husky Corporation
    Inventor: Thomas O. Mitchell
  • Patent number: 6823895
    Abstract: The disclosure describes a magnetorheological fluid control valve. The magnetorheological fluid control valve comprises an electromagnetic coil having a first end and a second end. A first arm is magnetically coupled to the first end of the electromagnetic coil. A second arm is magnetically coupled to the second end of the electromagnetic coil. The second arm has a passage. A ferromagnetic rod having a diameter less than that of the passage is disposed in the passage and magnetically coupled to the first and second arms. A first manifold is coupled to the second arm at one end of the passage. A second manifold is coupled between the second arm and the first arm at an end of the passage opposite the first manifold. A magnetorheological fluid is disposed in the passage.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: November 30, 2004
    Assignee: The Board of Regents of the University and Community College System of Nevada on Behalf of the University of Nevada
    Inventors: Gregory H. Hitchcock, Faramarz Gordaninejad
  • Patent number: 6718789
    Abstract: A compact, inexpensive pipe freezer with defrost cycle for forming a frozen ice plug in a section of pipe to be repaired, and, after the repair operation has been completed, defrosting the pipe freezer's evaporator and freeze heads so that the pipe freezer can be removed from the frozen pipe without damaging the pipe freezer.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: April 13, 2004
    Inventor: Arthur Radichio
  • Patent number: 6575188
    Abstract: The present invention relates to a valve for use in a microfluidic system. The valve includes a substrate defining an upstream channel and a downstream channel joined by a passage, wherein the passage comprises a first opposed wall disposed at an angle to a central axis of the upstream channel. A thermally responsive substance (TRS) obstructs the passage. At least a portion of the TRS that obstructs the passage abuts the first opposed wall. Upon the actuation of the heat source in thermal contact with the TRS an opening motion of the TRS opens the passage.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: June 10, 2003
    Assignee: Handylab, Inc.
    Inventor: Gene Parunak
  • Patent number: 6568415
    Abstract: A storing device is disclosed having a gas-sealing device and/or a heating device provided for a pipe connecting a storing tank for an easily polymerizable and/or coagulating liquid substance and a liquid sealing implement-protecting device. A method for the control of the pressure in the storing device is also disclosed. This invention contemplates protecting a storing device against deformation and fracture.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: May 27, 2003
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kenji Nakahara, Takeshi Nishimura, Kazuhiko Sakamoto, Hiroo Iwato, Masakatsu Mori
  • Patent number: 6557575
    Abstract: Methods and devices for the management of fluid flow within nanoscale analytical systems, comprising a freeze thaw valve having differing geomentries to constrict a frozen plug within the freeze thaw segment. The freeze thaw valve is directed to use in high-pressure analytical systems. The geometry of an inner diameter of a channel or tube within a freeze thaw segment is configured to cause constriction of a freeze plug when axial force is applied. The constriction is used in the flow-path of a freeze thaw valve to prevent movement of the frozen plug at high pressures to avoid valve leakage.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: May 6, 2003
    Assignee: Waters Investments Limited
    Inventors: Geoff C. Gerhardt, Edouard S. P. Bouvier, Theodore Dourdeville
  • Publication number: 20030019522
    Abstract: The present invention relates to a valve for use in a microfluidic system. The valve includes a substrate defining an upstream channel and a downstream channel joined by a passage, wherein the passage comprises a first opposed wall disposed at an angle to a central axis of the upstream channel. A thermally responsive substance (TRS) obstructs the passage. At least a portion of the TRS that obstructs the passage abuts the first opposed wall. Upon the actuation of the heat source in thermal contact with the TRS an opening motion of the TRS opens the passage.
    Type: Application
    Filed: September 18, 2001
    Publication date: January 30, 2003
    Inventor: Gene Parunak
  • Patent number: 6495374
    Abstract: Fluid sampling device comprising a sampling cell (1) provided with a thermal control valve having a plug (21) made from a solid low-melting temperature material that is made permeable to the fluid by temporary heating. The device comprises an intermediate cell (6) with a central channel (7) provided with a plug made from the solid material, which communicates an inlet with a first end and an outlet with the opposite end, and suited to tightly fit into the inlet hole of the sampling cell, a device (12, 13) for connecting the two cells (1, 6) to each other and an element (14) associated with a seal (20) for connecting, at the inlet of intermediate cell (6), a linking tube (15) to a reactor (17) producing the fluid to be sampled.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: December 17, 2002
    Assignee: Institut Francais du Petrole
    Inventors: Pascal Mougin, Philippe Ungerer, Gérard Moracchini
  • Publication number: 20020179145
    Abstract: The disclosure describes a magnetorheological fluid control valve. The magnetorheological fluid control valve comprises an electromagnetic coil having a first end and a second end. A first arm is magnetically coupled to the first end of the electromagnetic coil. A second arm is magnetically coupled to the second end of the electromagnetic coil. The second arm has a passage. A ferromagnetic rod having a diameter less than that of the passage is disposed in the passage and magnetically coupled to the first and second arms. A first manifold is coupled to the second arm at one end of the passage. A second manifold is coupled between the second arm and the first arm at an end of the passage opposite the first manifold. A magnetorheological fluid is disposed in the passage.
    Type: Application
    Filed: May 30, 2002
    Publication date: December 5, 2002
    Inventors: Gregory Henry Hitchcock, Faramarz Gordaninejad
  • Patent number: 6450203
    Abstract: A method of controlling flow of a driven fluid in a channel, the channel being defined by an encircling wall, the method comprising the steps of sealing the channel with a sealing fluid immiscible in the driven fluid blocking the channel at an initial position, in which the sealing fluid has a first contact angle with the encircling wall and the driven fluid has a second contact angle with the encircling wall and the first contact angle is less than the second contact angle; and moving the sealing fluid in the channel by a force generated outside of the channel.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: September 17, 2002
    Assignee: Micralyne Inc.
    Inventors: Christopher J. Backhouse, Herbert A. Hartshorne
  • Patent number: 6415821
    Abstract: Magnetically actuated fluid handling devices using magnetic fluid to move one or more fluids (gases or liquids or both) through microsized flow channels are provided. Fluid handling devices include micropumps and microvalves. Magnetically actuated slugs of magnetic fluid are moved within microchannels of a microfluidic device to facilitate valving and/or pumping of fluids and no separate pump is required. The magnets used to control fluid movement can be either individual magnets moved along the flow channels or one or more arrays of magnets whose elements can be individually controlled to hold or move a magnetic slug. Fluid handling devices include those having an array of electromagnets positioned along a flow channel which are turned on and off in a predetermined pattern to move magnetic fluid slugs in desired paths in the flow channel. The fluid handling devices of the present invention can handle gases and liquids simultaneously and thus can be made to be self-priming.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: July 9, 2002
    Assignee: University of Washington
    Inventors: Andrew Kamholz, Anson Hatch, Karl Bohringer, Paul Yager
  • Patent number: 6408884
    Abstract: Magnetically actuated fluid handling devices using magnetic fluid to move one or more fluids (gases or liquids or both) through microsized flow channels are provided. Fluid handling devices include micropumps and microvalves. Magnetically actuated slugs of magnetic fluid are moved within microchannels of a microfluidic device to facilitate valving and/or pumping of fluids and no separate pump is required. The magnets used to control fluid movement can be either individual magnets moved along the flow channels or one or more arrays of magnets whose elements can be individually controlled to hold or move a magnetic slug. Fluid handling devices include those having an array of electromagnets positioned along a flow channel which are turned on and off in a predetermined pattern to move magnetic fluid slugs in desired paths in the flow channel. The fluid handling devices of the present invention can handle gases and liquids simultaneously and thus can be made to be self-priming.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: June 25, 2002
    Assignee: University of Washington
    Inventors: Andrew Kamholz, Anson Hatch, Karl Böhringer, Paul Yager, Berhard Weigl
  • Publication number: 20020043283
    Abstract: A device for controlling a liquid flow by a gas pressure. The device includes a pressure chamber, in which an overpressure, an underpressure or atmospheric pressure may prevail. The pressure in the pressure chamber can be used for allowing the liquid flow to pass or for stopping the liquid flow. Furthermore the liquid flow can be limited to a predetermined rate of flow. The device may interalia be used in sewage systems, hydraulic engineering works and irrigation works.
    Type: Application
    Filed: November 8, 2001
    Publication date: April 18, 2002
    Inventor: Gertjan Roelof Bouwkamp
  • Patent number: 6321766
    Abstract: An electromagnetic flow control valve for an electrically conductive liquid having a plurality of coils and yokes surrounding a non-metallic, such as alumina, tube through which an electrically conducting liquid, such as liquid metal, flows. Direct current applied to the coils causes retarding forces to be imposed on the flowing liquid. The electromagnetic flow control valve can be used in conjunction with a continuous caster where the electromagnetic flow control valve is in fluid communication with a tundish. Built-in galvanomagnetic probes measure changes in the applied magnetic field to determine the rate of flow of liquid metal through the device.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: November 27, 2001
    Inventor: Richard D. Nathenson
  • Patent number: 6302134
    Abstract: This invention provides methods and apparatus for performing microanalytic and microsynthetic analyses and procedures. Specifically, the invention provides a microsystem platform for use with a micromanipulation device to manipulate the platform by rotation, thereby utilizing the centripetal force resulting from rotation of the platform to motivate fluid movement through microchannels embedded in the microplatform. The microsystem platforms of the invention are also provided having microfluidics components, resistive heating elements, temperature sensing elements, mixing structures, capillary and sacrificial valves, and methods for using these microsystems platforms for performing biological, enzymatic, immunological and chemical assays. An electronic spindle designed rotor capable of transferring electrical signals to and from the microsystem platforms of the invention is also provided.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: October 16, 2001
    Assignee: Tecan Boston
    Inventors: Gregory Kellogg, Stephen G. Kieffer-Higgins, Bruce L. Carvalho, Gene A. Davis, John P. Willis, Ted Minior, Laura L. Chapman, Mikayla Kob, Sarah D. Oeltjen, Shari Ommert, Alec Mian
  • Publication number: 20010017158
    Abstract: Magnetically actuated fluid handling devices using magnetic fluid to move one or more fluids (gases or liquids or both) through microsized flow channels are provided. Fluid handling devices include micropumps and microvalves. Magnetically actuated slugs of magnetic fluid are moved within microchannels of a microfluidic device to facilitate valving and/or pumping of fluids and no separate pump is required. The magnets used to control fluid movement can be either individual magnets moved along the flow channels or one or more arrays of magnets whose elements can be individually controlled to hold or move a magnetic slug. Fluid handling devices include those having an array of electromagnets positioned along a flow channel which are turned on and off in a predetermined pattern to move magnetic fluid slugs in desired path in the flow channel. The fluid handling devices of the present invention can handle gases and liquids simultaneously and thus can be made to be self-priming.
    Type: Application
    Filed: December 15, 2000
    Publication date: August 30, 2001
    Inventors: Andrew Kamholz, Anson Hatch, Karl Bohringer, Paul Yager
  • Patent number: 6199577
    Abstract: A system for regulating pressure in a sealed chemical storage tank. The system includes a vent passage connected to the tank, through which gas may pass into and out of the tank. The vent passage includes a first enclosed region having a first volume and a second enclosed region having a second volume. A volume of liquid, which is less than each of the first and second volumes, is associated with the vent passage to selectively constrain the passage of gas through the vent passage. Increased pressure in the tank moves the liquid into the second enclosed region. The second enclosed region is constructed to accommodate the volume of liquid to allow gas to pass. Vacuum in the tank moves the liquid into the first enclosed region. The first enclosed region is constructed to accommodate the volume of liquid to allow gas to pass.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: March 13, 2001
    Assignee: SEH America, Inc.
    Inventors: Andrew J. Bomber, Michael A. Hamilton
  • Patent number: 6186176
    Abstract: A method and system for controlling the flow of a gaseous medium through a fluid are described. The method includes providing a rheologic fluid through which a gaseous medium can be conducted, and controlling the viscosity of the rheologic fluid to control the flow of the gaseous medium. The system has a rheologic fluid, which is located in particular in a device to be controlled, a guide guiding the gaseous medium through the fluid, and a field applier for applying a field at least partially in the area of the rheologic fluid.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: February 13, 2001
    Assignee: Knorr-Bremse Systeme fuer Schienenfahrzeuge GmbH
    Inventor: Gottfried Gelbmann