Device Including Linearly-aligned Power Stream Emitter And Power Stream Collector Patents (Class 137/842)
  • Patent number: 9802209
    Abstract: A fluidic oscillator having independent frequency and amplitude control includes a fluidic-oscillator main flow channel having a main flow inlet, a main flow outlet, and first and second control ports disposed at opposing sides thereof. A fluidic-oscillator controller has an inlet and outlet. A volume defined by the main flow channel is greater than the volume defined by the controller. A flow diverter coupled to the outlet of the controller defines a first fluid flow path from the controller's outlet to the first control port and defines a second fluid flow path from the controller's outlet to the second control port.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: October 31, 2017
    Inventor: Mehti Koklu
  • Patent number: 9725246
    Abstract: Particular embodiments of the inventive technology disclosed herein relate to the use of a dynamic valve to reduce motion caused by impulse force applied to a positioned component. Typically, the inventive technology finds application in an internally pressurized positioning system. At times, use of the inventive technology may lead to cost savings by, e.g., allowing for the use of smaller diameter positioner actuators and/or a reduced internal pressure.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: August 8, 2017
    Assignee: Flexibility Engineering, LLC
    Inventors: Joseph Pawelski, Thomas M. Ingraham
  • Patent number: 9695654
    Abstract: A wellbore servicing system disposed at a wellbore, the wellbore servicing system comprising at least one wellbore servicing equipment component, wherein a flow path extends from the wellbore servicing system component into the wellbore, and a flow-back control system, wherein the flow-back control system is disposed along the flow path, and wherein the flow-back control system is configured to allow fluid communication via the flow path in a first direction at not less than a first rate and to allow fluid communication via the flow path in a second direction at not more than a second rate, wherein the first rate is greater than the second rate.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: July 4, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Stanley V. Stephenson, Joseph A. Beisel
  • Patent number: 9441597
    Abstract: Fuel systems for supplying fuel to an engine are described. In one example, fuel is evacuated from a fuel rail upon vehicle shut-off by directing fuel from a fuel pump to provide a motive flow for an ejector to pump fuel from the fuel rail to a fuel tank.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: September 13, 2016
    Assignee: Ford Global Technologies, LLC
    Inventor: Ross Dykstra Pursifull
  • Patent number: 9339825
    Abstract: A fluidic oscillator having independent frequency and amplitude control includes a fluidic-oscillator main flow channel having a main flow inlet, a main flow outlet, and first and second control ports disposed at opposing sides thereof. A fluidic-oscillator controller has an inlet and outlet. A volume defined by the main flow channel is greater than the volume defined by the controller. A flow diverter coupled to the outlet of the controller defines a first fluid flow path from the controller's outlet to the first control port and defines a second fluid flow path from the controller's outlet to the second control port.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 17, 2016
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Mehti Koklu
  • Patent number: 9038652
    Abstract: An inflatable device is provided, comprising a carcass and an internal air intake mechanism assembly. The carcass defines a surface of the device and surrounds an inner volume of the device, and has an opening. The internal air intake mechanism assembly comprises a primary one way valve mechanism joined to the carcass to cover the opening. The primary one way valve mechanism extends into the inner volume and is configured for enabling air to be directed into inner volume from an environment external to the carcass, while preventing or limiting air flow from the inner to the external environment.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 26, 2015
    Inventor: Andre Lee Lewis Henry
  • Patent number: 7682138
    Abstract: Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: March 23, 2010
    Assignee: Minolta Co., Ltd.
    Inventors: Kusunoki Higashino, Yasuhisa Fujii, Shunichi Hayamizu, Yasuhiro Sando
  • Patent number: 7128092
    Abstract: An arrangement for separating a fluid from admixtures has at least a first and a second separation unit. The separation units are of the type using an increased pressure or pressure difference for their function and have improved performance with increased pressure. The second separation unit is supplied with the fluid by a pressurising pump device. The first separation unit furnishes fluid of reduced concentration of admixtures to the pressurising pump device. It is supplied with supply fluid having reduced, the same, or elevated concentration of admixtures, preferably either taken directly from an outlet of the pump device or from an outlet of the second separation unit for fluid of increased concentration of admixtures. Overall, the concentration of admixtures in the fluid supplied to the second separation unit is decreased, leading to an increase in overall performance.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: October 31, 2006
    Assignee: DCT Double-Cone Technology AG
    Inventors: John Herman Stark, Hansjorg Wagenbach, Paul Werner Straub
  • Patent number: 7077207
    Abstract: The performance of a double-cone device (1) is increased, not only by moving the gap or inlet openings (22) a short distance into the exit cone (47), but also by making the conicity ?3 (55) of the so-formed small diffuser less than the conicity ?2 (109) of the remaining part (53) of the exit cone. Double cone units (7, 60), particularly the ones with this improved diffuser, may be used in pump installations (1, 60), like well-pumps (1), where liquids must be pumped from great depths.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: July 18, 2006
    Assignee: DCT Double-Cone Technology AG
    Inventors: John Stark, Hansjörg Wagenbach, Jörg Schār
  • Patent number: 7066190
    Abstract: An air-driven microfluid control device and its method are disclosed. The control device contains an air source, a first inlet, a second inlet, a narrow sector, and an outlet. The air source is connected two the two inlets to produce an airflow. The first inlet connects to the narrow sector, which then connects to the outlet. The air flows through the first inlet and the narrow sector and exits via the outlet. A fluid tunnel connects to the narrows sideways. The second inlet connects to the fluid tunnel so that the air entering the second inlet flows into the fluid tunnel. Through the interaction between the two inlets, pushing and pulling forces can be produced to control the fluid inside the fluid tunnel.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: June 27, 2006
    Assignee: Dr. Chip Biotechnology Incorporation
    Inventors: Chien-An Chen, Shun-Chieh Yang
  • Patent number: 6840280
    Abstract: These and other objects of the present invention are achieved by provision of a flow through ultrasonic system for facilitating the flow of flow-resistant materials. The system includes a supply of material and an ultrasonic horn having at least one passage extending therethrough. An isolating tube which is compatible with the material is provided passing through the at least one passage in the ultrasonic horn, the isolating tube in communication the supply of material and completely isolating the ultrasonic horn from the material. A converter imparts ultrasonic energy to the ultrasonic horn, and in turn to the isolating tube so as to inhibit the material from attaching to and clogging the isolating tube.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: January 11, 2005
    Assignee: Sonics & Materials Inc.
    Inventor: William P. Simon
  • Patent number: 6837262
    Abstract: A refueling system for vehicles including a dual valve receiver connected in fluid communication with the fuel tank, and a jet sensor inside of the fuel tank and in fluid communication with the receiver. The refueling system further includes a relief valve vent in fluid communication with the fuel tank to vent the fuel tank and to relieve pressure that may otherwise build up inside the fuel tank during refueling. When refueling with an automatic shutoff nozzle, the sensor detects when a desired fuel level has been reached, and then informs the receiver to prevent fuel flow into the tank. When this occurs, the pressure inside the receiver and automatic shutoff nozzle increases, causing the nozzle to shut off automatically.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: January 4, 2005
    Assignee: Adel Wiggins Group
    Inventors: Jose Cortez, David Wicke
  • Publication number: 20040159357
    Abstract: An arrangement for separating a fluid from admixtures comprises at least a first (36) and a second separation unit (45). The separation units are of the type needing an increased pressure or pressure difference for their function of showing improved performance with increased pressure.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 19, 2004
    Applicant: DCT Double-Cone Technology AG
    Inventors: John Herman Stark, Hans Jorg Wagenbach, Paul Werner Straub
  • Patent number: 6701960
    Abstract: The lifetime of a double-cone device (21) for creating a pressure difference in a streaming fluid can be greatly increased by moving the inlet gap (5) into the exit cone (4). This results in a short so-called diffuser (22) being obtained between the gap (5) and the orifice (19), where entry cone (3) and exit cone (4) are connected. The increased lifetime permits the double-cone device to cope with much higher flow rates. Thus higher system pressures are created which enhance the use of the double-cone for such applications as the desalination of sea water by reverse osmosis. The important application of the seperation of oil from water using a separating device such as a cyclone (57) working under elevated pressure is now feasible. The increased power of the double-cone permits one to profit more fully from the new concept of reduction of the concentration of the feed supplied to the double-cone device (21).
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: March 9, 2004
    Assignee: DCT Double-Cone Technology AG
    Inventors: John Herman Stark, Hansjörg Wagenbach, Paul Werner Straub
  • Patent number: 6578607
    Abstract: A diffuser comprises a conduit having a cross-sectional area that increases in a direction fluid flow. In one embodiment, the diffuser is used to reduce the incidence and severity of flow fluctuations that occur in an electrostatic deposition apparatus. In some embodiments, the diffuser includes one or more flow control features. A first flow-control feature comprises one or more appropriately-shaped annular slits through which fluid having a greater momentum than a primary fluid moving through the diffuser is injected into the “boundary layer” near the wall of the diffuser. A second flow control feature comprises one or more annular slits or, alternatively, slots or holes that are disposed at appropriate locations around the circumference of the diffuser through which a portion of fluid flowing in the boundary layer is removed. Boundary-layer flow removal is effected, in one embodiment, by creating a pressure differential across such annular slit or slots.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: June 17, 2003
    Assignee: Delsys Pharmaceutical Corp.
    Inventors: Kerry Dennis O'Mara, David Keller, Joseph Thomas McGinn
  • Patent number: 6505648
    Abstract: A device (10) for treating a continuously moving liquid has a liquid inlet (12) and a liquid outlet (14) at opposite ends of a generally annular passage (16). The passage has a restriction (18) which is generally cylindrical and which, at its outlet (22) is formed with an annular shoulder (24) which provides an abrupt change in the diameter of the passage. An obstruction (26) in the form of a wire extends across the restriction (18) adjacent the outlet (22). The restriction (18) serves to increase the speed of liquid flowing through the passage, thus reducing the liquid pressure. The obstruction (26) also assists in reducing the liquid pressure. The device reduces the liquid pressure below a level at which cavitation occurs in order to induce cavitation.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: January 14, 2003
    Assignee: Coventry University
    Inventors: Stephen Gergely, Peter White
  • Publication number: 20020153047
    Abstract: Methods devices and systems that employ non-mechanical valve modules for controllably directing fluid and other material movement through integrated microscale channel networks. These non-mechanical valve modules apply forces that counter the driving forces existing through a given channel segment, via fluidly connected channel segments, so as to selectively arrest flow of material within the given channel segment.
    Type: Application
    Filed: January 24, 2002
    Publication date: October 24, 2002
    Applicant: Caliper Technologies Corp.
    Inventors: J. Wallace Parce, Andrea W. Chow
  • Patent number: 6450189
    Abstract: Atomized particles within a desired size range (e.g., 1 micron to about 5 microns) are produced from two immiscible fluids, a first fluid source containing the formulation to be atomized, and a second fluid source which is contained in a pressure chamber surrounding at least the area where the first liquid is to be provided. The invention provides methods for: the production of templates for microfabrication, such as particles that serve as templates for self-assembly of monolayers; the creation of small particles to serve as building blocks for the microassembly of objects; and the use of an atomizate to etch configurations and/or patterns onto the surface of an object by removing a selected portion of the surface.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: September 17, 2002
    Assignee: Universidad de Sevilla
    Inventor: Alfonso Gañán-Calvo
  • 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: 6152181
    Abstract: Microdevices based on surface tension and wettability are useful as sensors, detectors, actuators, pumps, among other applications. As sensors and detectors they can respond to numerous stimuli such as pressure, temperature, gravity, rotation, acceleration, oscillation, chemical environments, magnetic fields, electric fields, radiation, and particle beams with a great choice of output options. Because of their design, they can be used in a broad range of temperatures and environments. Additionally, unlike other microsensors and detectors, these devices can be exposed to forces and pressures orders of magnitudes greater than their design limit and still return to their original accuracy and precision. These microdevices are also useful as actuators, pumps, valves and shutters. It is possible by joining these devices together to form complex devices that are able to control macroscopic flows for example. They are also able to perform complex electrical switching operations.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: November 28, 2000
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Phillip G. Wapner, Wesley P. Hoffman
  • Patent number: 5983943
    Abstract: The invention relates to a fluidic oscillator which is symmetrical with respective to a longitudinal symmetry plane, comprising a fluid inlet intended to form a bidimensional fluid jet which oscillates transversally with respective to the symmetry plane, an obstacle wherein is arranged a cavity which faces said fluid inlet and which is scavenged by the oscillation jet, characterized in that the obstacle has a front wall which has two so-called front surfaces substantially planar and framing the cavity, the plane of each surface being substantially perpendicular to the symmetry plane, said cavity being defined by a surface which is substantially parallel to said plane at the points where said surface joins each of said front surfaces, the obstacle also having two side walls of which said side surfaces are substantially parallel to the symmetry plane at the points where each of them joins the corresponding front surface.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: November 16, 1999
    Assignee: Schlumberger Industries, S.A.
    Inventors: Andrew John Parry, Philippe Hocquet
  • Patent number: 5771684
    Abstract: Flow diverter methods and apparatus useful, for example, in adsorber systems capable of meeting the California ultra-low emission vehicle (ULEV) standard, are described, the adsorber systems incorporating a combination of a burn-off catalyst and a modified adsorber constructed with an open flow region of substantially unobstructed flow having a hole or a region of larger cell openings, the flow diverter acting to control exhaust flow through the adsorber to both increase adsorption and reduce the light-off time of the burn-off catalyst.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: June 30, 1998
    Assignee: Corning Incorporated
    Inventors: William Hertl, Donald L. Guile, Mallanagouda D. Patil, Jimmie L. Williams
  • Patent number: 5638867
    Abstract: The invention provides a fluidic oscillator which is symmetrical about a longitudinal plane of symmetry (P), the oscillator comprising means for generating an oscillating two-dimensional fluid jet, an obstacle provided in its front portion with a cavity that is swept by the oscillating jet, and a longitudinal element disposed in the empty space situated downstream from said obstacle in such a manner as to partially subdivide said space into two identical zones, and to form between them at least one communication channel for the fluid. The invention also provides a fluid flow meter including such a fluidic oscillator.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: June 17, 1997
    Assignee: Schlumberger Industries, S.A.
    Inventor: Bao Tuan Huang
  • Patent number: 5363704
    Abstract: A fluidic oscillator and a flow meter including such a fluidic oscillator comprising a fluid inlet suitable for forming a two-dimensional jet: an obstacle possessing a front portion in the form of a chamber facing the inlet on the path of the jet, said chamber including two walls that are symmetrical about a longitudinal plane of symmetry passing through said inlet, the walls meeting said plane; and means for increasing the pressure on each of the lateral flanks of the obstacle in the vicinity of the front portion in alternation and in a relationship with the oscillation of the jet between the walls of the chamber.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: November 15, 1994
    Assignee: Schlumberger Industries
    Inventor: Bao T. Huang
  • Patent number: 5285812
    Abstract: A jet level sensor used for controlling the liquid level in a tank such as a fuel tank. The sensor includes a nozzle and receiver supported within a bracket so that the nozzle and receiver and the associated conduits are freely rotatable with respect to the bracket. A manifold is coupled to the receiver for providing a plurality of output pressure signals indicative of the liquid level within the tank. The sensor is connected to a system which includes a main inlet valve and redundant relay valves which are fluid pressure responsive and which shut off responsive to the absence of a pressure signal from the sensor when the liquid within the tank reaches a predetermined desired level. Also provided are shut-off valves connected to be responsive to a tank and nozzle failure over-pressure condition at the inlet or within the tank.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: February 15, 1994
    Assignee: HR Textron, Inc.
    Inventor: Gerald A. Morales
  • Patent number: 5129585
    Abstract: A spray-forming output device for fluidic oscillators to provide relatively wide-angle three-dimensional output spray patterns is connected to the output of a fluidic oscillator. The device comprises mutually counter-directed conduits whose entry regions are fed from the oscillator output and whose exit regions are connected to an interaction outlet region that includes a common outlet, the common outlet being directed substantially orthogonally with respect to the plane in which the counter-directed conduits are disposed. In one embodiment, the interaction outlet region includes an impact wall disposed at the exit regions of the counter-directed conduits proximally to the common outlet.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: July 14, 1992
    Inventor: Peter Bauer
  • Patent number: 5111847
    Abstract: A pneumatic actuator comprises a cell through which a normally laminar flow of air passes between an inlet and an outlet to provide, in the outlet, an output pressure. The cell includes an electro-acoustic transducer, for example a piezo-electric element arranged, in response to an oscillating electrical signal, to produce an acoustic signal that disturbs the laminar flow whereby at least some of the air exhausts from the cell via one or more exhaust ports and the output pressure falls. The difference in the output pressures may be used to control a pneumatic device optionally via a pneumatic amplifier. The electrical signal is produced by an opto-electrical transducer to which optical control signals are transmitted, for example along a fibre optic cable.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: May 12, 1992
    Assignee: Norgren Martonair Limited
    Inventors: Fang-Quan Hu, Michael Page, John M. Watson
  • Patent number: 4716935
    Abstract: A full wave fluidic rectifier which produces a direct fluidic output signal having an amplitude which increases from a very low level as the amplitude of an alternating fluidic input signal increases. In includes a nozzle for directing a fluid stream along the rectifier axis into a null venting outlet, two signal outlets which are symmetrically disposed in opposite sides of the null outlet, and two control signal inlets for applying the alternating input signal to the stream, deflecting the stream alternately toward the two signal outlets in proportion to the amplitude of the alternating input signal. The two signal outlets are connected by respective channels of equal fluid resistance to a common channel which serves as the rectifier output.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: January 5, 1988
    Assignee: United States of America as represented by the Secretary of the Army
    Inventors: Nassy Srour, Tadeusz M. Drzewiecki
  • Patent number: 4617970
    Abstract: A fluidic sensor of objects comprising a body in which there are mounted an emitting nozzle connected to a feeding chamber connected to a feeding conduit, and an intake nozzle disposed in the area defined by the emitting nozzle and connected to an outlet conduit. Between the inlet conduit and the feeding chamber there is, shaped in the body, an additional chamber inside which there is a movable valve body with conical seats shaped on opposite ends, which is connected to a switching sensor movably mounted in the body. The switching sensor disconnects the flow of feeding energy when the object is outside a zone of detection and causes an acoustic signal if the object moves too close to the fluidic sensor. The acoustic signal can be used to cause a breakdown step.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: October 21, 1986
    Assignee: Institute po Mebeli I Obzavejdane
    Inventor: Ferdo A. Sivov
  • Patent number: 4596364
    Abstract: A small, but nevertheless high-flow fluidic oscillator has a dual level body portion including an interaction chamber in a first level. An inlet plenum supplies fluid to a supply nozzle which enters directly into the inlet end of the interaction chamber to direct a jet flow from the supply nozzle, through the interaction chamber and out of an outlet opening. A fluid passage is located at least partly in the second level of the body portion, and connecting passages on either side of the supply nozzle connect the fluid passage to the inlet end of the interaction chamber. The walls of the interaction chamber converge from the inlet end toward a neck portion and thereafter diverge and then converge again at the outlet so that a fluid column extends between the jet flow and the sidewalls of the interaction chamber, and moves cyclically back and forth through the fluid passage and the connecting passages to obtain interaction between the fluid column and the jet flow without the need for control nozzles.
    Type: Grant
    Filed: January 11, 1984
    Date of Patent: June 24, 1986
    Inventor: Peter Bauer
  • Patent number: 4532962
    Abstract: An apparatus is disclosed for dispensing a precise volume of liquid. An emitter dispenses a stream of liquid to an appropriate collector and includes an outlet restriction for generating a positive pressure in the emitter behind the outlet restriction. Liquid is fed to the emitter under pressure. A time delay loop is provided in communication with the emitter behind the outlet restriction for receiving liquid therefrom under the influence of the positive pressure. The exit end of the time delay loop directs liquid received thereby against the stream of liquid dispensed by the emitter and diverts the stream of liquid away from the collector when the time delay loop becomes filled with liquid under pressure from the emitter. A fluid amplifier is provided for generating a laminar liquid power stream to the emitter and for controlling the on-off cycle of the apparatus.
    Type: Grant
    Filed: April 20, 1984
    Date of Patent: August 6, 1985
    Inventor: Daniel N. Campau
  • Patent number: 4522228
    Abstract: A liquid level control system for controlling the flow of liquid into a reservoir, storage tank or other container. A nozzle develops a liquid flow stream therethrough, and a valve effectively opens and closes the nozzle. A fluid amplifier is associated with the nozzle and includes a fluid power stream, a signal developing port for receiving a fluid pressure signal from the power stream, and a sensor for diverting the fluid power stream from the signal developing port in response to the static presence of the interface at a predetermined sensing level of liquid in the reservoir. A pressure responsive switch is coupled to the valve and is located below the signal developing port of the fluid amplifier.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: June 11, 1985
    Inventor: Daniel N. Campau
  • Patent number: 4515178
    Abstract: A fluid amplifier for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level. An inlet develops a liquid flow stream. A first passage of major cross-sectional dimensions is provided for delivering a major portion of the flow stream to the reservoir or storage tank. A second passage of minor cross-sectional dimensions is spaced laterally of the first passage for developing a small signal fluid power stream substantially parallel to the major supply stream. A sensor is responsive to the static presence of the liquid level at the predetermined level for altering the smaller fluid power stream from its substantially parallel flow condition to a condition in which it diverts and attaches to the major supply stream.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: May 7, 1985
    Inventor: Daniel N. Campau
  • Patent number: 4479515
    Abstract: A fluidic flow control device includes at least three terminals with two of the terminals being connected to input nozzles opposing each other in axial alignment. An interspace is provided adjacent the point of intersection of the two streams from the nozzles and a radial diffuser is provided encircling the interspace. The third terminal communicates with the radial diffuser. The variable relationship between the flows produced at the nozzles is effective to control the flow at the third terminal. The diffuser is formed by planar faces separated by a constant width gap. The gap opens into an annular plenum to which the third terminal is connected. The entry area to the radial diffuser is sized to be substantially equal to the sum of the areas of the nozzle throats. In one embodiment, a mixer region may be provided between the diffuser and at least one of the nozzles. A fourth terminal acting as a vent may communicate with the mixer region.
    Type: Grant
    Filed: July 1, 1981
    Date of Patent: October 30, 1984
    Assignee: United Kingdom Atomic Energy Authority
    Inventor: John R. Tippetts
  • Patent number: 4459106
    Abstract: A main valve and separate sensing means are mounted in a housing spaced-apart relation. The main valve is formed with a valve chamber having an inlet port and an outlet port, and the valve comprises a valve seat and a valve member cooperating therewith. The valve member is movable between a closed position in which it engages the seat and blocks flow of fluid from the inlet to the outlet and an open position in which it is spaced apart from the seat and enables such flow. The sensing means includes an exhaust to the atmosphere and exhaust shutoff means actuable for closing the exhaust. The housing and main valve are formed with a passage enabling restricted leakage of fluid from the main chamber to the sensing means for exhaust to the atmosphere when the valve member is in the closed position. The leakage fluid is in communication with the valve member and when pressurized applies a force urging the valve member to the open position.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: July 10, 1984
    Assignee: Fluidic Medical Equipment Co.
    Inventors: Michael Peralta, Albert S. Goldstein, Jr., Bruce B. Schwartz
  • Patent number: 4345618
    Abstract: Arrangement for the regulation of the height of a liquid level, such arrangement being particularly suitable for the removal of condensate from the regeneration heaters of steam turbines. The arrangement includes a transmitter nozzle for forming a gas-liquid mixture in a first, influx chamber communicating with a tank containing the liquid, a second chamber connected with the influx chamber and containing a two-phase outlet sensor which separates the gas in the gas-liquid mixture, and a system for discharging liquid from the tank including a discharge valve controlled by the pressure of the liquid in the second chamber.
    Type: Grant
    Filed: January 9, 1981
    Date of Patent: August 24, 1982
    Assignee: Skoda, oborovy podnik
    Inventors: Josef Altman, Zdenek Roth
  • Patent number: 4312373
    Abstract: An internal valve for the bottom loading of fuel tanks consists of a differential area piston acting within a chamber which is vented by a pair of pilot valves responsive to fluid level, to provide full open, throttled and closed positions of the valve automatically in response to inlet fluid pressure. Soft closure of the inlet valve which is formed of the piston head and a seat in the valve housing, is provided by metered fluid flow through an orifice between a sized aperture in the piston head and a restrictor sleeve carried on a tank vent actuator bar extending through the aperture and through the valve housing. A lost motion connection between the piston head and actuator bar allows limited relative movement for controlling the metering orifice and combined movement for coincident opening of the tank vent in response either to inlet fluid pressure or manual actuation.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: January 26, 1982
    Assignee: Parker-Hannifin Corporation
    Inventors: Basil B. Tilling, Henry A. Swindler
  • Patent number: 4224985
    Abstract: Apparatus for containing a pressurized fluid jet, for example a "blow-out" of oil, comprises a receptacle of preferably frusto-conical form for holding a body of liquid such as water, and means whereby the jet can enter the receptacle, the arrangement being such that, with the body of liquid in the receptacle, sufficient energy is absorbed by movement of liquid to contain the jet. The energy may be absorbed by creation of vortices, and wall parts of the receptacle, when viewed in side elevation, preferably define an included angle of less than The apparatus may be used as part of an oil-production installation on an oil-rig.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: September 30, 1980
    Inventor: John E. Rapson
  • Patent number: 4211249
    Abstract: A liquid level control system is disclosed for use with a swimming pool or the like having a pool reservoir, a main drain or outlet, usually at the bottom of the reservoir, and an outlet located at a predetermined water maintenance level for the pool. The system includes fluid amplifier means positioned relative to the pool reservoir for sensing an interface between liquid and gas, or water and air, at the surface of the water in the pool and developing a fluid pressure signal when the interface falls below a predetermined level. Liquid circulation means, including a skimmer at the surface of the water in the pool reservoir is provided for circulating water from the pool reservoir between the outlet and an inlet. A portion of the water circulated by the circulation means is channeled to the fluid amplifier means for operating the same. Fluid valve means is provided which is responsive to the fluid pressure signal developed by the fluid amplifier means.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: July 8, 1980
    Assignee: Fluid Device Corporation
    Inventor: George B. Richards
  • Patent number: 4203462
    Abstract: The solenoid operated water valve has a Venturi on its outlet which aspirates air through the pressure sensing side of a pressure switch until the water level in the washing machine reaches the end of the tube connected to the system through the selection valve. This prevents further aspiration and the Venturi rapidly lowers the pressure in the pressure switch to actuate the switch. The check valve prevents venting the pressure switch to atmosphere long enough for the associated timer to continue the machine program.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: May 20, 1980
    Assignee: The Singer Company
    Inventor: W. E. Beller
  • Patent number: 4194390
    Abstract: A method of ascertaining the state of aggregation of a medium, whereby the flow of the medium is directed to a first of a series of two or more coaxially arranged nozzle means, further the initial pressure of said medium ahead of said series of nozzle means is compared with a further pressure, said pressure generated when following nozzles are flowed at directly through a respective preceding nozzle via a closed space arranged between two or more nozzles or following the final nozzle, and the correspondingly generated differential pressure is utilized as measurement value for indication of the state of aggregation and if necessary directly or indirectly for controlling the flow of said medium.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: March 25, 1980
    Assignee: Klinger AG
    Inventor: Hans Deinlein-Kalb
  • Patent number: 4182486
    Abstract: In a system to control a condition of air in a duct, there is disclosed a first nozzle for issuing a jet of fluid, a second nozzle for receiving a portion of said fluid depending upon the condition of the air in the duct, and a circuit arrangement for controlling a damper in the duct dependent upon the amount of fluid received by the second nozzle.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: January 8, 1980
    Assignee: Honeywell Inc.
    Inventor: Richard C. Mott
  • Patent number: 4161188
    Abstract: A jet type liquid level sensor and its combination with a fluid pressure operated valve whose opening and closing is controlled by the sensor at predetermined liquid levels within a tank in which the sensor and valve are installed. The sensor is designed for installation such that the jet stream issuing from a nozzle thereon travels horizontally to a receiving orifice which transmits the velocity head of the jet stream to an actuator for holding the valve open until such time that the jet stream is diffused by rising level of liquid in the tank. The nozzle has a shroud surrounding the jet stream and a pickup tube that extends a substantial distance below the nozzle. The pickup tube delivers liquid to the shroud for diffusing the jet stream when the liquid level is falling from the predetermined high shutoff level to the predetermined low reopening level corresponding to the position of the lower end of the tube at which point the jet stream is re-established for opening the valve.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: July 17, 1979
    Assignee: Parker-Hannifin Corporation
    Inventor: Richard G. Jorgensen
  • Patent number: 4121620
    Abstract: A device for simultaneously modulating and amplifying low frequency sounds which comprises a tubular member having an axial bore extending a distance interiorly of the inlet end thereof and tapering to a reduced axial bore in said tubular member. A generally perpendicular passageway in said tubular member intersects said reduced axial bore, the top wall of which terminates adjacent to said intersection and the bottom wall of which extends past said intersection, said extended portion being deflected a finite angle relative to the normal axial flow. The tubular member is received by a sleeve, and a first baffle flared in the direction of the flow is angularly disposed relative to said sleeve to define a first passageway in said tubular member.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: October 24, 1978
    Assignee: L.P.S. Incorporated
    Inventors: Charles G. Pickett, Ronald S. Pickett
  • Patent number: 4120322
    Abstract: A hydraulic turbulence amplifier is provided for measuring and controlling the temperature of a liquid supplied to the power nozzle of the amplifier, i.e., the working fluid. As a result of the high pressures at which the laminar-to-turbulence flow transition occurs power applications without additional amplification is feasible. A crossover capability for the output of two sensor-amplifiers operated at different values of supply pressure enables temperature or pressure control systems to be provided.
    Type: Grant
    Filed: April 22, 1975
    Date of Patent: October 17, 1978
    Inventor: Romald E. Bowles
  • Patent number: 4094284
    Abstract: Exhaust gas is recirculated to an intake manifold of an engine by a shut-off valve and a fluidic amplifier for modulation in accordance with different engine parameters. The shut-off valve is normally biased to a closed position and it is opened to permit recirculation in response to a signal received from a fluidic NOR gate which operates in accordance with position of a carburetor throttle, engine speed and engine temperature. The fluidic amplifier includes a power jet chamber receiving a supply of exhaust and a vent chamber in fluid communication with a venturi disposed in the exhaust manifold, a receiver chamber and a pair of control jets. One of the control jets may be in fluid communication with the intake manifold or with a carburetor venturi. The other control jet may be open to atmospheric pressure compensated for the effect of changes in air density or engine speed.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: June 13, 1978
    Assignee: Eltra Corporation
    Inventor: William Fred Gesell
  • Patent number: 4071960
    Abstract: A system for drying and/or transporting particulate material, including fluidizing the material by means of pulsed air flow in jets which oscillate parallel to the path of motion of a bed of the material in an assymetric sweeping fashion which applies a net transporting force in one sense or direction, or by applying such pulsed flow so that the net force in either sense is zero, to cause drying without transport. The system utilizes phase locked acoustic oscillators to provide sweeping jets of fluid moving in opposite directions for drying and in the same direction for transporting the particulate material. The fluid oscillators are fabricated from 2 groups of molded or extruded members with the members of each group being identical. Spacers are employed to position the parts whereby to provide the desired oscillator configuration.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: February 7, 1978
    Inventor: Romald E. Bowles
  • Patent number: 4041984
    Abstract: A jet-driven Helmholtz fluid oscillator having two openings located coaxially in opposite walls of a chamber. A fluid jet enters through one opening, the inlet, at a constant flow rate and exits through the other opening, the outlet, at a pulsating or oscillating flow rate. The pressure level within the chamber also fluctuates. All critical dimensions of the oscillator are subject to geometrical similarity and scale with the diameter of the inlet. The inlet flow rate is proportional to the Helmholtz frequency of the chamber and the jet length within the chamber. The outlet fluid flow and the chamber pressure oscillate at substantially the same frequency as the Helmholtz frequency.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: August 16, 1977
    Assignee: General Motors Corporation
    Inventor: Thomas Morel
  • Patent number: 4024887
    Abstract: Disclosed is an automatic valving system for shutting off liquid flow into a container when the level of liquid within the container is above a predetermined level, and for permitting liquid flow when the liquid is below the predetermined level. A liquid is positioned within the container at the predetermined level, and a pressure responsive shutoff valve is fluidly connected in series between a source of liquid under pressure and the interior of the container. The shutoff valve has communication with the fluid sensor and is operative to shut off liquid flow into the container in response to a pressure variation received from the sensor upon the level of liquid within the container rising above the predetermined level.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: May 24, 1977
    Assignee: Vought Corporation
    Inventor: Ronald W. McGregor
  • Patent number: RE31973
    Abstract: In a system to control a condition of air in a duct, there is disclosed a first nozzle for issuing a jet fluid, a second nozzle for receiving a portion of said fluid depending upon the condition of the air in the duct, and a circuit arrangement for controlling a damper in the duct dependent upon the amount of fluid received by the second nozzle.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: August 20, 1985
    Assignee: Honeywell Inc.
    Inventor: Richard C. Mott