Pressure Modulating Relays Or Followers Patents (Class 137/82)
  • Patent number: 9611843
    Abstract: A micro-gas pressure driving apparatus includes a miniature gas transportation module and a miniature valve module. The miniature gas transportation module includes a gas inlet plate, a fluid channel plate, a resonance membrane and a piezoelectric actuator. A first chamber is defined between the resonance membrane and the piezoelectric actuator. After the piezoelectric actuator is activated to feed a gas through the gas inlet plate, the gas is transferred to the first chamber through the fluid channel plate and the resonance membrane and then transferred downwardly. Consequently, a pressure gradient is generated to continuously push the gas. The miniature valve module includes a gas collecting plate, a valve membrane and a gas outlet plate. After the gas is transferred from the miniature gas transportation module to the gas-collecting chamber, the gas is transferred in one direction, so that a pressure-collecting operation or a pressure-releasing operation is selectively performed.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: April 4, 2017
    Assignee: MICROJET TECHNOLOGY CO., LTD.
    Inventors: Ta-Wei Hsueh, Ying-Lun Chang, Hsiang-Dyi Wu, Rong-Ho Yu, Shih-Chang Chen, Tsung-Pat Chou, Yau-Ji Lee, Jia-Yu Liao
  • Patent number: 9562838
    Abstract: A steel measuring element is provided. The steel measuring element is made of an austenitic chromium-nickel steel with a low carbon and nitrogen content for measuring pressure, with an edge zone being provided with increased hardness.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: February 7, 2017
    Assignee: WIKA ALEXANDER WIEGAND SE & CO. KG
    Inventors: Rolf Bloecher, Rolf Kaufmann, Armin Hawlik
  • Patent number: 9453585
    Abstract: An electromagnetic linear valve which can effectively suppress a self-excited oscillation of a plunger is provided. A resilient member 64 urges a plunger 22 in a direction in which the core-opposing portions 70, 78 move away from a core portion 28, and moves the plunger 22 in a direction in which the core-opposing portions 70, 78 approach the core portion 28 in the case where an electric current is supplied to a coil 24.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 27, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Masaki Nanahara, Katsuhiro Kanamori, Masakuni Suzuki, Takeshi Ishida
  • Patent number: 9429173
    Abstract: A positioner includes: an explosion proof container containing, in an interior space, an electric circuit module and an electropneumatic converter converting, into pneumatic signals, electric signals processed by the electric circuit module; and a pneumatic amplifier, provided outside of the explosion proof container, amplifying the pneumatic signal converted by the electropneumatic converter. The explosion proof container is formed with air flow paths for the air fed into the pneumatic amplifier and the air fed out of the pneumatic amplifier, in a thick portion between inner and outer wall faces of the container that encompasses the surrounding of the interior space. The air flow paths are formed along an inner wall face of the explosion proof container. The inner wall face of the explosion proof container where on the air flow path is formed is arc-shaped or a shape that uses many curved faces of free curve shapes.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: August 30, 2016
    Assignee: AZBIL CORPORATION
    Inventor: Kazuhisa Inoue
  • Patent number: 9038666
    Abstract: Systems, methods and apparatus for providing an electromagnetic flow controller. In one embodiment, an electromagnetic flow controller can have two substrates, a permanent magnet, and two electrical traces. One of the substrates may deflect away from the other substrate upon applying an electrical signal to at least one of the two electrical traces.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: May 26, 2015
    Assignee: General Electric Company
    Inventors: Wei Chen, Kevin McMahan, Shiva Srinivasan
  • Patent number: 8967175
    Abstract: Disclosed are a method and device for modulating the downstream pressure output of a pressure reducing hydraulic control valve in response to the flow demand fluctuation the method comprising. Included is an adjustable pressure pilot valve mechanism having a drive element extending from the control valve. The drive element is displaceable in response to a flow capacity through the hydraulic control valve. Also included is an adjustable pressure pilot valve deployed along a control tube connecting an upstream pressure port to a downstream pressure port, the adjustable pressure pilot valve associated with the drive element such that adjustable settings of the adjustable pressure pilot valve are responsive to displacement of the drive element.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: March 3, 2015
    Assignee: Bermad CS Ltd.
    Inventors: Moshe Azoulay, Zvi Barkan, Zvi Weingarten
  • Patent number: 8845303
    Abstract: A pump control system and a torque control valve are disclosed. In one embodiment, the torque control valve includes a sleeve, a spool disposed in the sleeve, and a piston rod disposed through the spool. The spool has a first recess area, a second recess area, and a third recess area. The first and third recess areas each have a port extending into a central bore of the spool. The piston rod includes a groove orifice feature having a spiral groove and is configured such that a fluid flowing from the port in the first recess area to the port in the third recess area must flow through at least a portion of the spiral groove. The fluid flowing through the spiral groove operates to bias the spool in a direction towards the second axial end of the spool.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: September 30, 2014
    Assignee: Eaton Corporation
    Inventor: Shu Wang
  • Publication number: 20140216589
    Abstract: A multifunctional energy saving and carbon reduction apparatus includes an outer pipe and a foam layer. The outer pipe includes an inlet and an outlet, and each of the inlet and outlet is connected to an outer-pipe connector, inside the outer pipe is formed an inner space in communication with the inlet and the outlet. The foam layer is stuffed in the inner space and formed with a plurality of orifices and contains small amount of natural radiation ore powder. The multifunctional energy saving and carbon reduction apparatus allows the reactants, such as liquid fuel and oxidizer or gaseous fuel and oxidizer, to come into direct contact with the radiation element layer, when the reactants flow through the energy saving and carbon reduction apparatus, so as to enhance combustion efficiency.
    Type: Application
    Filed: January 10, 2014
    Publication date: August 7, 2014
    Inventors: Shoou-Jeng SONG, Xiu-Hao LIU
  • Publication number: 20140182701
    Abstract: In a coating apparatus including: an anilox roller which is rotatably supported and in which multiple recessed cells are formed on an outer peripheral surface; and a chamber device which is in contact with the outer peripheral surface of the anilox roller and in which varnish to be coated on a sheet is delivered from a delivery path of a chamber head into a chamber, the chamber device configured to supply the delivered varnish from the chamber to the cells of the anilox roller and discharge the varnish in the chamber from a discharge hole of a chamber body to the outside, the chamber device has pressure fluctuation reducing means, in an attachment hole of the chamber body, for reducing a pressure fluctuation in the chamber of the chamber head in such a way that the pressure in the chamber is maintained constant.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Applicant: KOMORI CORPORATION
    Inventor: Ikuo SUGIMOTO
  • Publication number: 20140166116
    Abstract: A charging device for a shaft furnace comprises a main casing and at least one nozzle for introducing a clean gas into the casing. According to an important aspect of the invention, a controller is configured to adapt the supply (the flow rate) or pressure of clean gas in the main casing based on charging status information.
    Type: Application
    Filed: July 19, 2012
    Publication date: June 19, 2014
    Applicant: PAUL WURTH S.A.
    Inventors: Paul Tockert, Emile Lonardi, Lutwin Franziskus, Guy Thillen, Gérald Hubeaux
  • Publication number: 20140102549
    Abstract: In a comparing circuit, the value of a control signal from a higher-level device and a normal range that is set for the control signal are compared, and the result is sent to a control unit. The control unit, when sent the result indicating that the value of the control signal is outside of the normal range, forcibly adjusts the electric current signal (the adjusted electric current) to the electropneumatic converter to zero, regardless of the deviation between the value indicated by the control signal and the value indicated by the valve opening signal. The adjustment of the electric current in the control unit is performed using a normal function that is possessed by the control unit, that is, the function for changing continuously the value of the electric current signal in accordance with the deviation.
    Type: Application
    Filed: October 12, 2012
    Publication date: April 17, 2014
    Applicant: AZBIL CORPORATION
    Inventor: Kouji OKUDA
  • Patent number: 8621778
    Abstract: A modulator (10, 10A) for changing a constant flow of gas to a pulsed or intermittent flow of gas, said modulator (10, 10A) including a housing component (11) and an insertion tube (15) for insertion into a hollow interior (16) of the housing component (11) wherein after insertion of the insertion tube (15) into the housing component (11), gas is generated either in situ within the hollow interior (16) of the housing component (11) and be caused to flow out of an outlet (23A) of the modulator (10, 10A) in pulses or alternatively gas is passed into the insertion tube (15) in a constant flow and upon reaching the hollow interior (16) of the housing component (11) is released therefrom through the outlet (23A) in a pulsed flow.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: January 7, 2014
    Assignee: Bantix Worldwide Pty Ltd
    Inventor: Andrew Conventry
  • Patent number: 8528583
    Abstract: A pneumatic amplifier is provided comprising a supply air valve with a supply input connected to a pneumatic supply, a signal input for receiving a pneumatic input signal, a signal output for transmitting an amplified pneumatic output signal, a valve member for continuously opening or cutting off a pneumatic connection between the pneumatic supply and the signal output, and a diaphragm coupled with the valve member exposed at one side to the pneumatic input signal and having an opposite side. An exhaust air valve is provided with a bleed output, and a valve member for opening or cutting off a pneumatic connection between the signal output of the supply air valve and the bleed output. The valve members of the supply air valve and the exhaust air valve are structurally separated. The opposite side of the supply air valve diaphragm is exposed to the amplified pneumatic output signal.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: September 10, 2013
    Assignee: Samson Aktiengesellschaft
    Inventor: Stefan Kolbenschlag
  • Patent number: 8454126
    Abstract: A print head includes a fluid cavity and nozzle in fluid communication with the fluid cavity. A stopper is positioned adjacent the nozzle and adapted to control flow of fluid through the nozzle. An arm supports the stopper and is configured to pivotally move the stopper with respect to the nozzle. An electromagnet is positioned adjacent the arm and configured to move the arm toward the electromagnet to open the nozzle.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: June 4, 2013
    Inventor: Martin McNestry
  • Publication number: 20130112283
    Abstract: A connector can include a first portion with a cylindrical end. The connector can also include a second portion having a cylindrical cavity and a plurality of collars disposed along an interior circumference of the cavity and extending inward so as to contact the first portion when the first portion is inserted into the second portion and to create a seal between the cylindrical end and the cylindrical cavity. The connector can further include a pressure equalization channel with an opening toward the cylindrical cavity at one end and a valve disposed at the other end, the valve being configured to have a first position at which the pressure equalization channel is open to an exterior, and a second position at which the pressure equalization channel is sealed.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 9, 2013
    Inventor: Yuriy Zakuskin
  • Patent number: 8408230
    Abstract: An I/P converter is disclosed. The I/P converter comprises a nozzle (7) coupled to a magnetic circuit. A temperature compensation ring (3) is coupled to the top side of the magnetic circuit. A flexure (1) is coupled to the temperature compensation ring. The temperature compensation ring is configured to position the flexure relative to a first end of the nozzle and the temperature compensation ring is configured to maintain the relative position between the nozzle and the flexure over a range of temperatures.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: April 2, 2013
    Assignee: Norgren Limited
    Inventors: Chris Wheater, Paul Hartley, Rajendra Parmar
  • Publication number: 20120279580
    Abstract: A process fluid pressure transmitter for measuring a process pressure referenced to atmospheric pressure is provided. The process fluid pressure transmitter includes a pressure sensor fluidically coupled to a pair of pressure conveying conduits. The pressure sensor has an electrical characteristic that varies with the pressures applied by the pressure conveying conduits. A process fluid inlet is disposed to contact a process fluid, and is in fluidic communication with a first conduit of the pair of pressure conveying conduits. An atmospheric vent is coupled to a second conduit of the pair of pressure conveying conduits. The atmospheric vent is replaceable and has a filter element disposed therein.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 8, 2012
    Applicant: Rosemount Inc.
    Inventors: George Charles Hausler, Nicholas Haywood, Daniel Ronald Schwartz
  • Publication number: 20120255621
    Abstract: A control system for a vehicle includes a fuel tank selection module, a fuel depletion determination module, and a fuel pressure balancing module. The fuel tank selection module closes (N?M) of N shutoff valves of N compressed natural gas (CNG) fuel tanks, respectively, when an enable condition is met and the N shutoff valves have been open for a first predetermined period, wherein N is an integer greater than one and M is an integer less than N. The fuel depletion determination module determines whether the M CNG fuel tanks have provided a predetermined amount of fuel based a fuel parameter. The fuel pressure balancing module opens the N shutoff valves for the first predetermined period when the M CNG fuel tanks have provided the predetermined amount of fuel.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 11, 2012
    Applicant: GM Global Technology Operations LLC
    Inventor: Grant Meade
  • Publication number: 20120199211
    Abstract: An airflow control system for controlling pressure and flow through a flow passage with an upstream portion and a downstream portion includes a valve which can open to different positions for controlling pressure at a downstream portion of the flow passage; a valve actuator which receives electrical signals to control the opening and closing of the valve; and a pneumatic feedback system to stabilize the valve actuator.
    Type: Application
    Filed: February 8, 2011
    Publication date: August 9, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Bruce R. Schroder, Jeffrey Ernst
  • Patent number: 8196595
    Abstract: Systems and processes may provide improved performance for a pneumatic positioner during a safety override. In certain implementations, a system and process may include may include the ability to receive an input control signal, power control circuitry of the pneumatic positioner using the input control signal, and generate a control signal for a signal-to-pressure converter with the control circuitry based at least partially on the input control signal. The system and process may also include the ability to detect an unsafe operating condition for the pneumatic positioner based on an input signal and modify the control signal in response to detecting the unsafe operating condition, to cause the converter to transition to a safe state. The system and process may additionally include the ability to allow the control circuitry to continue being powered by the input control signal while the converter is in the safe state.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: June 12, 2012
    Assignee: Dresser, Inc.
    Inventors: Mark Chester, Peter S. Levesque, Alex Legere
  • Patent number: 8104495
    Abstract: A multi-functional or versatile emergency shutdown valve controller may be used in various different emergency shutdown configurations to enable the testing of different types and configurations of emergency shutdown devices and the supporting equipment associated therewith. In one example, a digital valve controller for use with an emergency shutdown valve includes two pressure sensors and is adapted to be connected to a pneumatic valve actuator and to a solenoid valve device to assist in the on-line testing of the valve actuator as well as in the on-line testing of the solenoid valve. To perform testing of the solenoid valve, the valve controller may measure the pressure at different ports of the solenoid valve as the solenoid valve is actuated for a very short period of time. The valve controller may determine whether the solenoid device is fully functional or operational based on the derivative of the difference between the measured pressure signals, i.e.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: January 31, 2012
    Assignee: Fisher Controls International LLC
    Inventor: Jimmie L. Snowbarger
  • Publication number: 20110290337
    Abstract: A pressure relief device for a double isolation valve comprises a body with a valve cavity. The valve body has a pocket formed therein. A disc is disposed in the central section of the pocket. The disc is interposed between two spring-actuated seats. Each of the seats is in fluid communication with opposing valve sides. The pocket central section is in fluid communication with the valve body cavity. Each of the seats is provided with two different types of gaskets in series. In operation, reverse pressure causes retraction of the seats, thereby relieving valve body cavity overpressure.
    Type: Application
    Filed: May 26, 2011
    Publication date: December 1, 2011
    Inventor: Roberto Pozzati
  • Publication number: 20110240138
    Abstract: An operating mode of an electro-pneumatic converting unit is stored in advance in an electro-pneumatic converting unit operating mode storing unit. A blockage location identifying function is provided in a calculating unit. The operating unit monitors the magnitude of shift and the direction of shift of the control output, relative to the nozzle back pressure, through the blockage location identifying function, and identifies whether a blockage has occurred in the fixed orifice or the nozzle/flapper mechanism based on the magnitude of shift and direction of shift of the control output, relative to the nozzle back pressure, and based on the operating mode of the electro-pneumatic converting unit, stored in the electro-pneumatic converting unit operating mode storing unit.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Applicant: YAMATAKE CORPORATION
    Inventor: Yohsuke Inagaki
  • Publication number: 20110214751
    Abstract: Pressure regulator device comprising a body (1), a minimum of a pressure reducer and a damper mounted in control and damping cavities, respectively, in the body (1), and a control member (4) pivoting on an upper face (10) of the body (1). The device is noteworthy in that the control and damping cavities have open ends in a peripheral face (12) of the body (1) and the control member (4) has parts (47) that are opposite the peripheral face (12) in order to face the open ends of the respective control and damping cavities, from which control (21) and damping pushrods, respectively, project. The present invention has an application us the hydraulic remote controls of civil engineering machines.
    Type: Application
    Filed: October 16, 2009
    Publication date: September 8, 2011
    Applicant: BOSCH REXROTH D.S.I.
    Inventors: Gérard Laroze, Laurent Drutel
  • Publication number: 20110186144
    Abstract: The inventive technology, in embodiments, may include a controller configured to coordinate operation of valves and remotely controllable regulators that are fluidically communicative therewith, allowing the control of positioners of positioner zones that are in fluidically communicative with such remotely controllable regulators. Preferred embodiments may find application as, e.g., a pneumatic system to control positioners, whether such positioner find use in bottling applications or elsewhere. Additional aspects of the inventive technology may relate to methods for pressurized fluid positioner control.
    Type: Application
    Filed: January 29, 2010
    Publication date: August 4, 2011
    Applicant: Advanced Manufacturing Technology for Bottles, Inc.
    Inventor: Joseph W. Pawelski
  • Publication number: 20110114196
    Abstract: A pressure regulator includes a valve, mechanical advantage device, actuator, controller and pressure sensor. The valve is disposed between an inlet port and an outlet port. The valve includes a pintle and seat. An actuator is provided to move the pintle away from the seat to allow the flow of gas from the inlet port to the outlet port and a pintle return spring is provided to bias the pintle towards seat. The actuator is configured to move the pintle in response to the magnitude of a control signal. A control system is provided to receive a gas pressure signal from a pressure transducer at the outlet port which detects the gas pressure at the outlet port and generate a control signal having a magnitude proportional to the detected gas pressure.
    Type: Application
    Filed: June 15, 2010
    Publication date: May 19, 2011
    Inventors: Jason Lall, Jakub Hurnik, Andrew Lakerdas
  • Publication number: 20100307606
    Abstract: A hydraulic system has several valve sections, each having a directional valve that controls fluid flow from a pump to a hydraulic actuator. A mechanism senses a greatest pressure among the hydraulic actuators to provide a load sense pressure. One valve sections has a pressure compensation apparatus includes a pressure compensation valve that reduces fluid flow between a given directional valve and an associated hydraulic actuator in response to pressure at a control port, and a pressure regulating valve that responds to the load sense pressure and pressure in the associated hydraulic actuator by selectively applying output pressure from the pump and the load sense pressure to the control port.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 9, 2010
    Inventors: Lynn A. Russell, James E. Olsen, Michael J. Clark
  • Patent number: 7802585
    Abstract: In a transducer of at least one electrical input signal into two separate magnetic output signals for a pneumatic actuator, a pressure input is connected to a source of pressure and a setting unit sets the pneumatic output signals by use of the electrical input signal. The setting unit provides the two pneumatic output signals separately and reciprocal to each other as a function of the input signal. At least one of the two output signals is connected to a pneumatic amplifier.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: September 28, 2010
    Assignee: Samson Aktiengesellschaft
    Inventor: Stefan Kolbenschlag
  • Publication number: 20100170236
    Abstract: An apparatus and method for increasing energy harnessed from a liquid body flowing through a conduit includes a conduit having ascending, connecting and descending sections, valves inside the conduit, a fill unit, and at least one turbine. The valves, located in the ascending and descending portions of the conduit, regulate the flow of the liquid body through the conduit. The fill unit includes at least one of a pump and a siphon for replenishing liquid in the conduit and initiating a constant flow. An optional removably attached extension to the conduit increases the hydraulic head and increases the flow of the liquid body. The extension may include additional turbines. The turbines harness energy from the liquid body flowing with an increased flow rate through the conduit. The harnessed energy is increased by utilizing the atmospheric pressure exerted on the liquid body resulting in an increased constant flow through the conduit.
    Type: Application
    Filed: March 24, 2009
    Publication date: July 8, 2010
    Inventor: Shoetim Lezi
  • Publication number: 20100079514
    Abstract: In a liquid supply device, a liquid chamber and an air chamber of a storage tank are demarcated by an elastic film, a pressure sensor detects pressure within the liquid chamber, and a supply pump supplies liquid to a supply destination via the liquid chamber. First information, that expresses a supply amount per predetermined time and a pressure of the liquid chamber within a range of not being affected by changes over time in the elastic film, is stored in a memory. A controller adjusts detected pressure by adjustment values, and controls the supply pump such that an adjusted pressure becomes constant at a predetermined pressure. The controller controls the supply pump such that there becomes a supply amount that is substantially the same as a supply amount of the first information, and acquires pressure detected at that time as second information, and derives the adjustment values on the basis of an offset amount between pressures of the first information and the second information.
    Type: Application
    Filed: August 17, 2009
    Publication date: April 1, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Hiroshi SHIBATA
  • Patent number: 7645418
    Abstract: A gas purge device for a metallurgical melting vessel includes a conically shaped ceramic body (2) in contact at its top side with heat contained in the melting vessel. The ceramic body has a static external element and an internal element axially movable therein. A pneumatic drive axially moves the internal element to and fro relative to the external element between a closed position and an open position. The spring force of a spring retains the internal element in the closed position. The device furthermore includes a gas-tight enclosed volume arranged at the bottom side of the ceramic body the volume being connected to a gas supply duct for introduction of purge gas. A deformable membrane is connected to the internal element with the pressure difference between the purge gas pressure prevailing in the gas-tight enclosed volume and the ambient pressure acting upon the membrane.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: January 12, 2010
    Inventors: Stefan Munding, Germann Munding
  • Patent number: 7621293
    Abstract: A multi-functional or versatile emergency shutdown valve controller may be used in various different emergency shutdown configurations to enable the testing of different types and configurations of emergency shutdown devices and the supporting equipment associated therewith. In one example, a digital valve controller for use with an emergency shutdown valve includes two pressure sensors and is adapted to be connected to a pneumatic valve actuator and to a solenoid valve device to assist in the on-line testing of the valve actuator as well as in the on-line testing of the solenoid valve. To perform testing of the solenoid valve, the valve controller may measure the pressure at different ports of the solenoid valve as the solenoid valve is actuated for a very short period of time. The valve controller may determine whether the solenoid device is fully functional or operational based on the derivative of the difference between the measured pressure signals, i.e.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: November 24, 2009
    Assignee: Fisher Controls International LLC
    Inventor: Jimmie L. Snowbarger
  • Publication number: 20090159135
    Abstract: A pneumatic amplifier is provided comprising a supply air valve with a supply inlet connected to a pneumatic supply. A signal input for receiving a pneumatic input signal, a signal output for transmitting an amplified pneumatic output signal, a valve member for continuously opening or cutting off a pneumatic connection between the pneumatic supply and the signal output, and a diaphragm coupled with the valve member exposed at one side to the pneumatic input signal and having an opposite side. An exhaust air valve is provided with a bleed outlet, and a valve member for opening or cutting off a pneumatic connection between the signal output of the supply air valve and the bleed outlet, the valve members of the supply air valve and the exhaust air valve being structurally separated. The opposite side of the supply air valve diaphragm is exposed to the amplified pneumatic output signal.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 25, 2009
    Inventor: Stefan Kolbenschlag
  • Publication number: 20080072964
    Abstract: Provided are a microfluidic device and a microfluidic network formed by connecting such microfluidic devices. The microfluidic device can equalize the flow of multiple microfluids in a chamber in parallel to thereby have an equal flow rate when the microfluids transferred through different flow channels join in the chamber having a changing cross-sectional area. The microfluidic device includes: multiple flow channels formed between an upper substrate and a lower substrate to transfer the microfluids and including inlets for injecting the microfluids in one side and fluid stopping surfaces for stopping the flow of the microfluids in the other side; a pressure controlling flow channel for removing a pressure difference between the microfluids; a fluid converging part for converging the microfluids; and a chamber composed of hydrophilic surfaces and hydrophobic surfaces disposed alternately in a flow direction so that the microfluids join and flow in parallel and equal.
    Type: Application
    Filed: February 15, 2007
    Publication date: March 27, 2008
    Inventors: Sung-Jin KIM, Kwang-Hyo CHUNG, Hyeon-Bong PYO
  • Publication number: 20080035208
    Abstract: The invention relates to a diaphragm (1) for throttling a volume flow in an air distribution ducting system of an air-conditioning unit of a commercial aircraft. The diaphragm includes a plurality of spring-elastic elements (10) that effect a throttling of the volume flow through the diaphragm (1). The invention also relates to the use of such a diaphragm (1) for installation in an air distribution ducting system of an air-conditioning unit on board a commercial aircraft.
    Type: Application
    Filed: July 27, 2007
    Publication date: February 14, 2008
    Applicant: AIRBUS DEUTSCHLAND GMBH
    Inventor: Mohamed Bouhaj
  • Publication number: 20080021663
    Abstract: A depressurization process for a packed separation column is provided where the column system experiences a rapid and/or severe drop in pressure that could potentially damage column components. The process provides a safe de-pressurization of the column on the outlet side by decreasing the outlet pressure in controlled steps while allowing the inlet pressure of the column time to lower after each decreased step.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 24, 2008
    Inventors: Edwin E. Wikfors, Kimber D. Fogelman
  • Patent number: 7267137
    Abstract: A deadweight pressure standard provides improved measurement accuracy and repeatability. The standard includes a flow regulator having a first valve controlled by a first pair of non-hysteresis sylphons, and a supply regulator having a second valve controlled by a second pair of non-hysteresis sylphons. The first and second valves achieve an equilibrium state between the supply regulator and the flow regulator. The second valve regulates pressure generated by an applied pressure supply. A mass-to-pressure transducer transforms an applied gravitational force into a reference pressure regulated by the first valve. The center of pressure force on the first pair of non-hysteresis sylphons, and the center of pressure force on the first valve, are exerted along a first reference axis. The center of pressure force on the second pair of non-hysteresis sylphons, and the center of pressure force on the second valve, are exerted along a second reference axis.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: September 11, 2007
    Inventor: Lev Shildkret
  • Publication number: 20070186974
    Abstract: In a transducer of at least one electrical input signal into two separate magnetic output signals for a pneumatic actuator, a pressure input is connected to a source of pressure and a setting unit sets the pneumatic output signals by use of the electrical input signal. The setting unit provides the two pneumatic output signals separately and reciprocal to each other as a function of the input signal. At least one of the two output signals is connected to a pneumatic amplifier.
    Type: Application
    Filed: January 29, 2007
    Publication date: August 16, 2007
    Inventor: Stefan Kolbenschlag
  • Patent number: 7234482
    Abstract: The servovalve with torque motor consists of a cylindrical case (3) in which an armature (1) is arranged on one end of an arm (16) and a orifice (18) closing a nozzle (19) with working liquid (2) on the other side of the arm (16). The arm (16) is free to rotate round the pivot point of a flexible suspension (15) with a hole (21) of diameter corresponding to the maximum deflection of the arm (16). There are two magnetic pole shoes (5) and two electric pole shoes (4) located around the armature (1), equipped with sealing rings (6), and so the working liquid (2) filling the inside of the case (3) and surrounding the arm (16) and the armature (1) does not leak out of the inside space. Coils (7) are located outside the case (3). The pole shoes (4, 5) are equipped with threaded parts (12), fitting either into the outer ring (10) or the body (3). The magnetic pole shoes (5) are equipped with a non-magnetic protective housing (9).
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: June 26, 2007
    Assignee: Jihostroj a.s.
    Inventors: Vladimír Ryne{hacek over (s)}, Tomá{hacek over (s)} Hrachovský
  • Patent number: 7133763
    Abstract: The invention provides a control apparatus comprising a controller for determining a manipulated variable for manipulating a controlled object so that an output of the controlled object converges to a desired value and a modulator for modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm to generate a modulated signal to be applied to the controlled object. The modulator generates the modulated signal so that a center value of an amplitude of the modulated signal follows a change of the manipulated variable. Thus, the modulated signal in which the manipulated variable is reflected without any loss can be generated even when the manipulated variable changes.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: November 7, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventor: Yuji Yasui
  • Patent number: 7099235
    Abstract: A vibration transducer such as a geophone, comprising a central pole piece (110) with a magnet (112) and coil (118) concentrically arranged around it. The position of the magnet (112) is fixed relative to the pole piece (110) and the coil (118) is movable relative to the magnet (112). A method of manufacturing a vibration transducer is characterised in that a bobbin carrying the coils is formed from a substantially tubular body which is positioned on a mandrel and at least one coil is wound around its outer surface, the mandrel being removed from the bobbin when the coil is complete. Another method is characterised in that the coil is formed separately and the bobbin is formed from a substantially tubular body which is positioned inside the coil and expanded to contact the coil when in position.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: August 29, 2006
    Assignee: Schlumberger Technology Corporation
    Inventor: Masahiro Kamata
  • Patent number: 6957656
    Abstract: In a proportional solenoid valve, a cylindrical valve seat member includes an input/output-side passage provided between an input port and a drain port and between an output port and the drain port, a seat portion provided in an end portion of the input/output-side passage, and a drain-side passage provided between the seat portion and the drain port. The drain-side passage is formed by exhaust passage holes whose number is an even number equal to four or more and which are arranged at regular intervals in the circumferential direction of the valve seat member.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: October 25, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shigenobu Tochiyama, Yoshihiko Onishi, Shigeki Uno, Kenji Nakao
  • Patent number: 6880800
    Abstract: A pressure regulator has a magnet component group provided with a metal housing in which a winding and an armature are arranged, a flange composed of a synthetic plastic material and connected in an axial direction to the magnet component group, a metal guiding sleeve which is arranged in the flange for orientation and mounting of the magnet component group, a valve closing member which is actuated by the magnet component group and cooperates with a valve seat to separate a return side from a front side; a metal bushing which is connected with the housing through a metal connection and on which the valve seat is formed, the metal bushing having at least one discharge opening which leads to the return side.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: April 19, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Peter Zweigle, Martin Surerus
  • Publication number: 20040211463
    Abstract: In a proportional solenoid valve, a cylindrical valve seat member includes an input/output-side passage provided between an input port and a drain port and between an output port and the drain port, a seat portion provided in an end portion of the input/output-side passage, and a drain-side passage provided between the seat portion and the drain port. The drain-side passage is formed by exhaust passage holes whose number is an even number equal to four or more and which are arranged at regular intervals in the circumferential direction of the valve seat member.
    Type: Application
    Filed: September 11, 2003
    Publication date: October 28, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Shigenobu Tochiyama, Yoshihiko Onishi, Shigeki Uno, Kenji Nakao
  • Patent number: 6799598
    Abstract: In a two-way solenoid vale, a small diameter portion of a nozzle portion is fitted in a small diameter portion receiving part communicating with an output pressure oil passage and a large diameter portion is fitted in a large diameter portion receiving part communicating with a supply pressure oil passage. An opening of a through-hole formed in the nozzle portion faces the output pressure oil passage by way of the small diameter portion receiving part, and an inner end of the through-hole is opened and closed by a plunger and communicates with a drain port. An orifice port communicating with the through-hole is opened to the large diameter portion receiving part and communicates with the supply pressure oil passage. Since the orifice port is disposed in the solenoid valve, a separate plate for an orifice is not required, oil passage is simplified and the solenoid valve can be installed in an optional position.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: October 5, 2004
    Assignee: Jatco TransTechnology Ltd.
    Inventors: Masayoshi Yoshino, Shigeru Ishii, Nobufumi Yamane
  • Patent number: 6796322
    Abstract: A hydraulic pressure regulating valve for regulating a pressure in an automatic transmission of a motor vehicle, comprising a magnetic part which includes an electrically controllable coil, a coil core and a movable armature, a valve flange which is anchored on the magnetic part and has pressure medium guiding passages, a piston controlling a pressure in a passage connected to a consumer, the piston being loaded with the armature and controlling pressure medium connections between the passages, a diaphragm element which seals the valve flange relative to the magnetic part, a return passage, the diaphragm element having at least one pressure chamber which is hydraulically connected with the return passage, and a throttling device formed so that the pressure chamber is connected with the return passage through the throttling device.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: September 28, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Mehmet-Faith Sen
  • Patent number: 6755205
    Abstract: A method and apparatus to attenuate a flapper valve from oscillating is presented. An inertia tube is added to the flow path of the flapper valve nozzle, which effectively produces a stabilizing pressure force on the flapper at its natural frequency. The inertia tube has a length to area ratio of greater than approximately 1000 in/in2. The addition of an inertia tube to the nozzle makes the fixed size orifice of the nozzle behave like an orifice having a size that is a function of flow frequency. The inertia tube may be a straight tube, a coiled tube, a thread passage and the like.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: June 29, 2004
    Assignee: Woodward Governor Company
    Inventors: Brian E. Hoemke, Brian K. Lawver, Daniel J. McLevige
  • Publication number: 20040119332
    Abstract: A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communicates with a control port and a primary brake circuit port. A modulating piston includes surfaces selectively pressurized by the primary brake circuit port and a secondary brake circuit port. This modulates the pressure from the delivery port to thereby selectively apply the associated spring brakes if a failure is detected at the primary brake circuit port. The exhaust member selectively controls communication between the supply and delivery ports as necessary.
    Type: Application
    Filed: August 22, 2003
    Publication date: June 24, 2004
    Inventors: Andrew Marsh, John Kemer, Charles Eberling, Dave Knight, Richard T. Ross
  • Publication number: 20030102026
    Abstract: A gas pressure regulator shall be created that shows reproducible features even at minimum through flow values, and at the same time allows keeping its lock up characteristic. In addition, gas burners operated at a large modulating range shall allow ignition as well, with the internal pressure drop being kept as low as possible. Also, manufacturing expenses and number of gasproof connections shall be kept at a minimum. To achieve this, the inlet-side chamber and the outlet-side chamber are connected to each other—in addition to the existing passage that is used for pressure regulating purposes—by one or more separate openings with each of such opening forming a seat for a closing body that is individually assigned to said opening and guided in axial direction to its seat, whereat each such closing body is connected to the armature of an solenoid valve assigned to it.
    Type: Application
    Filed: October 16, 2002
    Publication date: June 5, 2003
    Inventor: Detlef Bayer
  • Patent number: 6467496
    Abstract: An electrohydraulic valve pilot stage for controlling differential pressure is disclosed. The electrohydraulic valve pilot stage has a housing for protecting the valve; a first and second inlet capable of connection to fluid supplies; a first nozzle and a second nozzle fluidly connected to the inlets; a baseplate attached to the housing and the nozzles; a restraining member attached to the baseplate at a position between the first nozzle and the second nozzle; a pivot pin; a flapper restrained by the restraining member and having a first end and a second end, the flapper pivotably mounted on the pivot pin; and a null adjust pin mounted in a pivot pin contact capable position for adjusting the position of the ends of the flapper relative to the nozzles.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: October 22, 2002
    Assignee: Sauer-Danfoss Inc.
    Inventors: Kenneth L. Oestreich, Wayne R. Anderson