Jet Control Type Patents (Class 137/83)
  • Patent number: 9739354
    Abstract: A flexure support apparatus for providing multiple axes support to reciprocating members for an energy conversion process includes a base having a sleeved opening disposed therethrough a central portion of the base and a plurality of apertures also disposed therethrough the base that are positioned outside of the sleeved opening, also included in a plurality of flexible finger assemblies that are positioned in an offset manner on opposing sides of the base. Further included is a pair of piston assemblies that are disposed within opposing ends of the sleeved opening being supported by the plurality of flexible finger assemblies, wherein the piston assemblies move in opposing and equal amounts in reciprocating movement within the sleeved opening being supported and controlled by the plurality of flexible finger assemblies, thus the pair of piston assemblies are able to do compressive work on a fluid within the sleeve without bearings or seals.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: August 22, 2017
    Inventor: Paul Hendershott
  • Patent number: 9592920
    Abstract: Apparatus and methods described herein provide for boundary layer flow sensor and corresponding determination of the flow characteristics of an ambient airflow over an aerodynamic surface. According to one aspect of the disclosure provided herein, the boundary layer flow sensor includes a body configured for mounting within or below the aerodynamic surface, a pressure port configurable between an open state for taking pressure measurements within the boundary layer of the ambient airflow and a closed state that protects the pressure port from contaminants when not in use.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: March 14, 2017
    Assignee: The Boeing Company
    Inventor: Jeffrey D. Crouch
  • Patent number: 9447797
    Abstract: A servovalve pilot stage (100) comprises a piezoelectric actuator (130) joined to a flow guide (132) and feedback wire (136) for connection to a main stage spool valve. The flow guide (132) and the piezoelectric actuator (130) may be integral.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: September 20, 2016
    Assignee: Moog Controls Ltd.
    Inventors: Dhinesh Sangiah, Paul Guerrier, Gary Powers
  • Patent number: 9352929
    Abstract: A winding device is provided with a rotor that rotates past an inner side and an outer side of an annular bead ring, which is fed in a circumferential direction, while holding a binding cord to wind the binding cord around the bead ring. The rotor includes a pushing member that elastically pushes the binding cord against the bead ring.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: May 31, 2016
    Assignees: Fuji Seiko Co., Ltd., Fuji Shoji Co., Ltd.
    Inventor: Shigeaki Nomura
  • Patent number: 8967179
    Abstract: A pilot stage for a jet type servo-valve, the pilot stage including an ejector for ejecting a jet of fluid and that is movable facing a deflector suitable for generating a pressure difference that can be used for moving a spool of the servo-valve. The ejector extends radially projecting from a column to which the ejector is secured and is in fluid-flow communication with a central bore of the column through which the ejector is fed with fluid, the column having a first end that is embedded in the servo-valve and through which the fluid is introduced into the column, and the column has a second end that is subjected to drive from a torque motor for selectively twisting the column in one direction or the other about a rest position.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 3, 2015
    Assignee: Zodiac Hydraulics, Societe par Actions Simplifiee
    Inventor: Guylain Ozzello
  • Patent number: 8317154
    Abstract: The disclosure relates to a method for operation of a position regulator for control of a pneumatic drive for an actuating member in a process installation. The position regulator has a pneumatic system with at least one nozzle/bounce-plate system, in which the bounce plates are in the form of piezo bending bars. For damped ventilation and venting of the pneumatic drive in the event of failure of the electrical power, it is proposed that the level of the electrical power supply be monitored and that, if a predeterminable limit value is undershot, the piezo bending bars of the pneumatics are adjusted via the input signals of the pneumatics such that the pneumatically controlled valves, which are subject to a characteristic, of the amplifier are open precisely just so far that a damped movement of the pneumatic actuating drive takes place to a predeterminable limit position at the desired movement speed.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: November 27, 2012
    Assignee: ABB AG
    Inventor: Thomas Kleegrewe
  • 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
  • Patent number: 7485163
    Abstract: There are provided a nozzle capable of enhancing the straight-advancing capability of jetted fluid to increase the back wash effect of a filter member, and a filter-type dust collector capable of effectively carrying out dust removal from a filter member with such a nozzle. To this end, the nozzle has a Laval nozzle section secured to the inside of an outer tube at its proximal end and a fluid guide section disposed at the leading end of the outer tube. The fluid guide section has a plurality of suction holes elongated in the flowing direction of the pressurized fluid. This nozzle is mounted on a pulse header tube of a dust removal device.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: February 3, 2009
    Assignee: Takuma Co., Ltd.
    Inventor: Satoshi Yoshimoto
  • Patent number: 6344702
    Abstract: A simplified torque motor which includes a plurality of parts defining appropriate alignment slots and grooves as well as openings for properly positioning the parts with respect to each other so that after being secured by appropriate fasteners, the torque motor may function as a first stage for the control of fluid through an appropriate valve. The various parts include a base carrying an armature, upper and lower pole pieces, permanent magnets, electromagnetic coils and shims disposed between the base and the lower pole piece to adjust the air gap between the poles of the upper and lower pole pieces. The shims are provided with appropriate slits to receive a tool for easy removal of the shim for air gap adjustment purposes.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: February 5, 2002
    Assignee: HR Textron, Inc.
    Inventors: Mario A. Rodriguez, Ori D. Chen-Zion
  • Patent number: 6158969
    Abstract: A variable displacement hydrostatic pump (11) having its displacement varied by a controller (17) in response to movement of a manual control lever (95) from a neutral position (FIG. 1). The vehicle has at least one other device (125,127) which provides an electrical output signal (133) indicating when operation of the pump (11) is "acceptable", in terms of either vehicle performance or operator safety. Associated with the control lever (95) is an input shaft (103) defining at least one stop surface (121,123). A solenoid assembly (109) has a moveable plunger (111), disposed adjacent the stop surfaces, and moveable between a retracted position (FIG. 4a) and an extended position (FIGS. 2 and 4), engaging one of the stop surfaces, when the output signal (133) indicates that operation of the pump is not acceptable.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: December 12, 2000
    Assignee: Eaton Corporation
    Inventors: Kevin J. Graf, Jerry D. Schrag
  • Patent number: 5768883
    Abstract: A system and method for controlling fluid mass-flowrate are provided. One embodiment of the method of the present invention essentially comprises generating in response to a requested mass-fluid flowrate a torque for controlling a torque-controlled valve to provide a flow of fluid from a supply to a remote space. Angular momentum is imparted to the fluid flow related to the actual mass-flowrate of the fluid flow. The angular momentum of the fluid flow generates a feedback torque therewith for counter-acting the controlling torque. The feedback torque is summed with the controlling torque to reduce the controlling torque as a function of the feedback torque whereby to form a hydromechanical closed-loop mass-flowrate servo-valve.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: June 23, 1998
    Assignee: Ametek Aerospace Products Inc.
    Inventor: Christopher R. Mayer
  • Patent number: 5651385
    Abstract: A device for operating a servo drive having a positioning element controlled by a pressure medium. The device includes an electrical control unit generating a control signal based upon the position of the positioning element, a pre-control system connected to receive the control signal through an electrical control path and a main control system controlled by the pre-control system to operate the servo drive by moving the positioning element. A switching element is positioned between the electrical control unit and the pre-control system and opens the electrical control path prohibiting the transmission of the control signal upon detecting operation malfunction. Upon opening of the control path, the pre-control system acts to switch the main control system into a deventilation mode and said positioning element is moved into a predetermined "fail safe" position deventilating the positioning volume of the drive.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 29, 1997
    Assignee: Mannesmann Aktiengesellschaft
    Inventor: Thomas Karte
  • Patent number: 5533935
    Abstract: A toy motion simulating apparatus for imparting motion to an operator controlled by a hydraulic control valve to proportionally direct hydraulic fluid from pitch, roll, and yaw fluid nozzles to respective pitch, roll, and yaw receiving chambers which are pivotably disposed with respect to the nozzles. A pitch and roll nozzle to proportionally direct hydraulic fluid to respective nose up and nose down pitch receiving chambers and clockwise and counter-clockwise roll receiving chambers and a yaw nozzle to proportionally direct hydraulic fluid to right and left yaw receiving chambers. The valve has a drain means for directing hydraulic fluid that doesn't flow into the receiving chambers out of the hydraulic control valve.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: July 9, 1996
    Inventor: Howard B. Kast
  • Patent number: 5522301
    Abstract: A two stage valve assembly responsive to signals from a control system for supplying pressurized fluid to two load lines. The first stage includes a motor that directs pressurized fluid from a jet pipe toward a receiver assembly having two receiver ports and a bleedoff area disposed between and separating the receiver ports. The second stage assembly includes two spool/sleeve assemblies that control the flow of pressurized fluid to and from the two load lines. A drain line from the receiver assembly includes a pressure relief valve, which insures that both spool/sleeve assemblies will be servo-controlled at all times. Cartridges may be inserted in the spool/sleeve assemblies to linearize the relationship between input current from the control system and the output force of an unequal area actuator connected to the load lines.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: June 4, 1996
    Assignee: E-Systems, Inc.
    Inventors: James E. Roth, Raymond D. Atchley, Ori D. Chen-Zion, John B. Pegram, Maurice E. P. Gunderson
  • Patent number: 5443089
    Abstract: An improved fluid amplifier (39) is operatively arranged in a flow path extending between a source (28, 31) of pressurized fluid (P.sub.s) and a fluid return (38) at a return pressure (R). The amplifier has at least one fluid connection (34 or 35) to a load. The amplifier has a movable mechanical member (24) operatively arranged to control the pressure at, and flow with respect to, the load. The mechanical member has a displacement range encompassing a null position and an off-null position. The improvement broadly includes a variable-impedance orifice (42 and/or 43) arranged in series with the amplifier in the low path. The impedance of the orifice is varied such that the impedance is a maximum when the mechanical member is in the null position and is a minimum when the mechanical member is in off-null position, such that flow from the supply to the return when the mechanical member is in the null position will be less than the maximum flow between the amplifier and the load.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: August 22, 1995
    Assignee: Moog Inc.
    Inventor: Anton Haumann
  • Patent number: 5392809
    Abstract: A hyper-reset pressure controller which includes two separate feedback paths which results in a substantially smoother and more accurate pressure control.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: February 28, 1995
    Assignee: Acme Steel Company
    Inventor: Steve Buckner
  • Patent number: 5333637
    Abstract: A transducer which provides a regulated pneumatic output as a function of an electric control input includes a housing, a gas regulator, and a particle trap. The housing has a passage therein, the passage including an inlet for receiving a pressurized gas supply and an outlet. The particle trap is disposed in the passage and includes a trap plate and a trap nozzle which directs gas against the trap plate so as to remove undesired entrained particles from the gas before it reaches the gas regulator.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: August 2, 1994
    Assignee: Rosemount Inc.
    Inventor: James L. Gravel
  • Patent number: 5303727
    Abstract: A deflector jet servovalve including a fluidic amplifier constructed utilizing a plurality of laminae stacked one upon the other and bonded together to form an integral laminated structure. The fluidic amplifier includes a fixed ejector and a pair of receivers disposed opposed the ejector with a movable deflector disposed between the ejector and the receivers to deflect a jet stream emanating from the ejector. Conduit means is also defined in the integral laminated structure to supply fluid under pressure to the ejector and to receive any differential fluid output therefrom.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: April 19, 1994
    Assignee: HR Textron Inc.
    Inventors: Samuel L. Wilson, Mario A. Rodriguez
  • Patent number: 5215111
    Abstract: A pneumatic servo comprises a motor having a shaft for rotation in response to an electrical signal. A cam is connected to the shaft for rotation therewith. The cam has an outer profiled periphery and opposite sides. A pneumatic nozzle having an opening for directing a flow of gas toward one side of the cam near the periphery, obscures the flow by different amounts as the cam rotates to create a back pressure in the nozzle comprising a pneumatic signal. A curved projection engages an opposite side of the cam, the projection being aligned with the nozzle opening and reducing oscillation excursions of the servo at gas pressures in the nozzle of above 12 psi.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: June 1, 1993
    Assignee: Elsag International B.V.
    Inventors: George R. Hall, II, Raymond J. Dippert, Thomas E. Stevenson, James M. Smith
  • Patent number: 5133379
    Abstract: A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element having a fixed end and a free, moveable end, and a conductive coil which surrounds at least a portion of the valve element adjacent its fixed end. An armature is secured to the valve element so as to be adjacent the conductive coil. Two permanent magnets, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A recieving plate is provided adjacent the free end of the valve element, the receiving plate having one or more channels formed therein for receiving fluid, and a bore for delivering fluid.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: July 28, 1992
    Assignee: University of Utah Research Foundation
    Inventors: Stephen C. Jacobsen, Edwin K. Iversen, David F. Knutti, Clark C. Davis
  • Patent number: 5133380
    Abstract: A pneumatic control valve (10) including a valve body (12) with fixed aperture plate (14), a movable redirector (18) and a force motor (26). The force motor (26) supports the redirector (18) adjacent to the aperture surface (16) of the fixed aperture plate (14) and is operable to move the redirector (18) back and forth along a line (28) without contacting the aperture surface. The aperture surface (16) has a plurality of apertures (70,72,74,76,78) with metering edges (124,126,128,130,132,134,136,138). The redirector (18) has redirector cavities (102,104,106,108) with metering edges (140,142,144,146). The force motor (26) deflects the redirector (18) to positions in which one or more of the cavities in the redirector connect two or more of the apertures (70,72,74,76,78) and direct fluid from some apertures and into other apertures. The location, length and shape of the metering edges can be varied as required to obtain desired fluid flow characteristics.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: July 28, 1992
    Assignee: Schenck Pegasus Corp.
    Inventors: Hugh V. Jamieson, III, Endre A. Mayer, Robert D. Kachman, Matthew E. Green
  • Patent number: 5088383
    Abstract: A multiplexed hydraulic control system which avoids the use of a rotary multiplexer and thereby allows for random selection of the multiplexed outlet ports and variable dwell times for the respective ports. A single hydraulic input is multiplexed among a plurality of hydraulic outputs. A control system provides two types of signals: (1) modulation signals selected from a plurality of multiplexed input signals for producing a modulating hydraulic flow, and (2) selector signals for operating on the multiplexer means to route the modulated signal to the appropriately selected channel.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: February 18, 1992
    Assignee: Woodward Governor Company
    Inventors: John W. Wardle, Plato J. Leeson, David G. Clay, Dale W. Sievert
  • Patent number: 5070898
    Abstract: A valve including a valve body, a torque motor mounted on the valve body and including an armature, a metering arm connected to the armature and extending into a first bore in the valve body, second and third coaxial bores in the valve body extending transversely to the first bore and being intersected by the metering arm, a pair of metering orifice members in the second and third bores with openings adjacent the metering arm, and fourth and fifth coaxial bores in the valve body having an axis which intersects both the metering arm and the axis of the second and third bores so as to permit viewing of the metering arm relative to the metering orifice members, a loose connection between the torque motor and the valve body to permit adjustment of the metering arm relative to the metering orifice members, and adjustment structure for permitting the axial and rotational orientation of the metering orifice members within the second and third bores.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: December 10, 1991
    Assignee: HSC Controls Inc.
    Inventors: Robert Jagodzinski, Bruce R. Goff
  • Patent number: 5067512
    Abstract: A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element having a fixed end and a free, movable end, and a conductive coil which surrounds at least a portion of the valve element adjacent its fixed end. An armature is secured to the valve element so as to be adjacent the conductive coil. Two permanent magnets, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A receiving plate is provided adjacent the free end of the valve element, the receiving plate having one or more channels formed therein for receiving fluid, and a bore for delivering fluid.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: November 26, 1991
    Assignee: Sarcos Group
    Inventors: Stephen C. Jacobsen, Edwin K. Iversen, David F. Knutti, Clark C. Davis
  • Patent number: 5031653
    Abstract: Pressure gain compensation for a single-stage servovalve of the jet pipe type. The pressure gain compensation is provided by a separate reciprocally mounted spool having a feedback wire connected between the spool and the ejector jet. The spool has a differential pressure applied across the ends thereof from the receptors disposed opposed the ejector jet. Movement of the spool applies a force feedback to the ejector jet which is proportional to the pressure differential across the receptors and is opposite the force applied to the ejector by the torque motor to thereby compensate for pressure gain.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: July 16, 1991
    Assignee: HR Textron Inc.
    Inventors: Samuel L. Wilson, Timothy C. Bryarly, Clyde E. Cobb
  • Patent number: 5012836
    Abstract: A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element having a fixed end and a free, moveable end, and a conductive coil which surrounds at least a portion of the valve element adjacent its fixed end. An armature is secured to the valve element so as to be adjacent the conductive coil. Two permanent magnets, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A receiving plate is provided adjacent the free end of the valve element, the receiving plate having one or more channels formed therein for receiving fluid, and a bore for delivering fluid.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: May 7, 1991
    Assignee: Sarcos Group
    Inventors: Stephen C. Jacobsen, Edwin K. Iversen, David F. Knutti, Clark C. Davis
  • Patent number: 5005600
    Abstract: A servovalve apparatus for use in fluid systems which comprises a flexible fluid conduit and a conductive coil which surrounds at least a portion of the conduit adjacent its upstream end. An armature is secured to the flexible conduit so as to be adjacent the conductive coil. Two permanent magnets, preferably formed of a rare earth metal material, are provided adjacent the armature on opposite sides thereof, the magnets being positioned such that one magnet presents a north magnetic pole facing the armature and the other magnet presents a south magnetic pole facing the armature. A receiving plate is provided adjacent the downstream end of the flexible conduit, the receiving plate having one or more channels formed therein for receiving fluid from the conduit.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: April 9, 1991
    Assignee: Sarcos Group
    Inventors: Stephen C. Jacobsen, Edwin K. Iversen, David F. Knutti
  • Patent number: 4855659
    Abstract: An electropneumatic position regulator having a current/pressure transducer has, as electric input, at least one coil (11) fed with a current (setting signal), as well as a permanent magnet (16) whose relative position is variable as a function of the current for the adjustment of a nozzle/impact-plate arrangement (17, 18) of a pneumatic system. The position regulator serves for a pneumatic setting device (23) which has a stroke output and is connected with the nozzle/impact-plate arrangement. The position regulator furthermore comprises a position report device with an electric path transmitter (31) which is connected to the stroke output (32) of the setting device (23). The report signal from the electric path transmitter (31) is fed back to the electric input (coil 12) of the current/pressure transducer.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: August 8, 1989
    Assignee: VDO Adolf Schindling AG
    Inventor: Heinrich Riensche
  • Patent number: 4796655
    Abstract: A fluid control device comprising a pivotable member which has a planar major face and is mounted so as to enable pivotal motion about an axis parallel to the major face. The pivotable member including a fluid jet channel which directs a fluid jet towards a fluid receiving channel defined in a receiving member. The pivotable member is pivotally rotated about the axis by a device operable to pivot the pivotable member. This device may be an electromagnet disposed with its poles adjacent and parallel to the major face of the pivotable member. The motion of the pivotable member alters the relative positions of the fluid jet channel/channels and the fluid receiving channel/channels and thereby the quantity of fluid received by the fluid receiving channel/channels.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: January 10, 1989
    Assignee: Dowty Hydraulic Units Limited
    Inventors: Dennis W. Parker, David F. Lakin
  • Patent number: 4660589
    Abstract: An optical feedback loop system used in conjunction with an optical hydraulic servovalve. The system uses light energy from a single fiber optic bundle for expanding a gas in a pair of bellows. When one of the bellows is expanded a jet pipe connected to a servo fluid inlet is moved from a first fluid outlet to a second fluid outlet.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: April 28, 1987
    Assignee: The Boeing Company
    Inventor: Richard D. Bartholomew
  • Patent number: 4638830
    Abstract: An improved magnetic actuator for providing mechanical actuation representative of an input current has a housing that supports a coil surrounding a central core, and includes a diaphragm type spring above the central core. A cover of high magnetic permeability is mounted on the housing spaced from the diaphragm spring. A permanent magnet is mounted on the diaphragm spring in a predetermined pole orientation and the magnet extends through an opening in the cover. The permanent magnet provides flux through the housing and the core. Sensitivity is increased by using the permanent magnet to provide a magnetic flux in addition to that created by currents in the coil.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: January 27, 1987
    Assignee: Rosemount Inc.
    Inventors: Gregory C. Brown, James L. Gravel
  • Patent number: 4614560
    Abstract: An adhesive applicator receives liquid adhesive from an adhesive supply and has a pneumatically operated valve for controlling the flow of adhesive through the applicator to a sheet driven along a path past the applicator. A pneumatic proximity switch is located along the path for sensing the sheet as it approaches the applicator. Air from a pressure amplifier is provided to the pneumatically operated control valve of the applicator in response to the proximity switch sensing the presence of a sheet along the path. The proximity switch also can be connected to a pneumatically operated electrical switch that provides a signal to a logic and control unit for indicating to a machine operator that a paper jam exists in the event the sheet does not clear the proximity switch within a predetermined time interval.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: September 30, 1986
    Assignee: Eastman Kodak Company
    Inventor: Ernest J. Tamary
  • Patent number: 4534376
    Abstract: An electric signal to pneumatic signal transducer 10 comprises a nozzle 12 that accepts an input pneumatic supply and expels a gas stream 20. A receiver 16 that is spaced from the nozzle is positioned to recover at least a portion of the gas stream. The recovered portion constitutes a pneumatic output signal. The position of a deflector 14 relative to the gas stream is controlled by an electric input signal to aerodynamically deflect the gas stream expelled from the nozzle. The aerodynamic deflection affects the magnitude of the portion of the gas stream recovered by the receiver in a manner having a known relationship to the electric input signal, thereby generating a pneumatic output signal responsive to the electric input signal.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: August 13, 1985
    Assignee: Rosemount Inc.
    Inventor: Gregory C. Brown
  • Patent number: 4503875
    Abstract: A gas/oil high-low pressure control apparatus having a helical bourdon tube sensing a gas control pressure and a gap sensor connected to a pressure indicator and rotating between high and low set point flags in which the gap sensor controls a pilot actuated valve which in turn controls a gas supply. A pressure regulator is connected between the gas supply and the inlet to the gap sensor and the outlet of the gap sensor is connected to the valve. The gap sensor outlet also provides a regenerative feedback signal to the regulator for providing a snap acting closing operation of the valve when the gap sensor detects a set flag. The gap sensor is of a thermoplastic having an aligned inlet and outlet with a closible opening aligned with the inlet and the outlet for periodically cleaning the inlet and the outlet. The linkage between the bourdon tube and the gas sensor includes first, second and third links with a zero adjustment, a span adjustment and a linearity adjustment and an overrange protector.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: March 12, 1985
    Assignee: Autocon, Incorporated
    Inventors: Gerald J. Murphy, Walter E. Pilie', Glenn Garaudy
  • Patent number: 4442855
    Abstract: A single-stage servovalve has a movable member operatively arranged to selectively divide a continuously-discharged fluid jet between two receiver passages. The hydraulic output of the valve is the differential between the conditions in the receivers. In the event of a hard-over failure of the control system of which the servovalve is a part, a jet deflector surface becomes operative to create a substantially balanced hydraulic condition in the receiver passages, thus terminating control.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: April 17, 1984
    Assignee: Moog Inc.
    Inventors: Stanley J. Hoffman, Jr., William D. Waffner
  • Patent number: 4441525
    Abstract: A fluidic system for stabilizing movement of a body subject to oscillation at its natural frequency, such as a tank-mounted gun, with appropriate circuitry and controls for notch filtering control output signals at the natural frequency.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: April 10, 1984
    Assignees: The Garrett Corporation, United States Government
    Inventors: Thomas B. Tippetts, Francis M. Manion
  • Patent number: 4425509
    Abstract: In a flapper nozzle actuator system a radial outward flow turbine like flapper is used as the flapper. The angular velocity of the turboflapper is used to lift the turboflapper off a backplate towards a nozzle. The amount of lift off the backplate and hence nozzle outlet area is a function of the angular velocity of the turboflapper. An adjustable opposing torque on the turboflapper controls the angular velocity of the turboflapper and thus controls the flow rate.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: January 10, 1984
    Assignee: Sperry Corporation
    Inventors: Joannes N. M. de Jong, Richard L. Earle, Anthony P. Nardi
  • Patent number: 4378031
    Abstract: A two-stage miniature electrohydraulic servovalve including an electromagnetic positioner having a flexure tube mounted drive arm secured to and movable with an armature movable in accordance with a combined magnetic field resulting from both permanent magnets and an electrical signal fed to electromagnetic coils, a four-way hydraulic valve main valve stage including a valve body having a sleeve mounted therein with two annular, internal, axially spaced apart metering grooves, a metering spool having five lands alternating with four metering grooves positioned within the sleeve for controlled axial movement with respect to the sleeve, and end caps positioned over the ends of the sleeve and a jet pipe pilot stage including a jet pipe member secured to the end of the drive arm having a jet pipe nozzle aligned with the drive arm and a hydraulic fluid feeder passage which passage is disposed at right angles to the plane of movement of the drive arm, a resiliently mounted counterbalance positioned on the drive arm
    Type: Grant
    Filed: May 22, 1979
    Date of Patent: March 29, 1983
    Assignee: Koehring Company
    Inventors: Robert D. Nicholson, Harish S. Patel, Alger T. Daniel
  • Patent number: 4368750
    Abstract: A fluidic servovalve is disclosed comprising a pilot stage valve having a pilot output for supplying a control fluid dependent upon a movable element, a boost valve responsive to the control fluid for supplying an output fluid, and a fluidic mechanical feedback connected from the output of the boost valve to the pilot stage valve, the fluid mechanical feedback having a ball-type motor responsive to the output fluid acting against it for positioning the movable element.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: January 18, 1983
    Assignee: Sundstrand Corporation
    Inventor: Robert V. Burton
  • Patent number: 4291716
    Abstract: A pilot stage valve is disclosed having a control mechanism for moving an actuating arm in response to an input signal, a jet pipe moved by the actuating arm for issuing a jet of fluid, a sandwich constructed receiver having a first receiver plate and a second receiver plate, each having a groove in the surface thereof facing each other with a splitter plate between the first and second receiver plates, the first and second grooves receiving a differential amount of fluid dependent upon the position of the jet pipe with respect to the splitter plate, the grooves being connected to respective outlet ports.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: September 29, 1981
    Assignee: Honeywell Inc.
    Inventor: Dwayne R. Elmberg
  • Patent number: 4273149
    Abstract: A blind pressure pilot apparatus provides a supportive base having a pressure responsive bourdon tube mounted on the base for sensing pressure within a connected test vessel. A pair of indicating arms are movably mounted on the bourdon tube upon a shaft mount which is attached to the bourdon tube and generates a rotation of the shaft responsive to pressure changes in the bourdon tube and the test vessel. Changes in pressure produce pivotal movement of each indicating arm which arms can be spaced to cover a desired span. A gap sensor is mounted upon the supportive base and provides a gap having a continuous stream of instrumentation gas flowing across the gap. During pivotal movement, each of the indicating arms generates an arcuate path, a portion of which intersects the gap and flowing stream of instrumentation gas. During such interruption, the flow of instrumentation gas is halted, which can produce desirable signals for operating valves, and performing like pneumatic instrumentation tasks.
    Type: Grant
    Filed: November 8, 1978
    Date of Patent: June 16, 1981
    Inventor: David R. Gordon
  • Patent number: 4170244
    Abstract: In fluid jet transfer valves comprising two opposing jet tube openings with high pressure fluid flowing out of one opening towards the other, the end surfaces of the jet tubes are provided with a novel shape which allows the tube ends to seal tightly together when they are coaxially aligned with each other and also to be deflected apart without binding. The shape of the end surface on one of the tubes is an inverted reproduction of the surface on the opposing tube so that when the tubes are coaxially aligned with each other and pressed together a tight seal will be formed. The end surfaces on the tubes are shaped so that the tubes may be freely moved laterally relative to each other without binding. The tilt of the end surfaces of the two tubes is minimized so that small lateral closure forces will generate much larger axial seating forces and so that the lateral opening forces created by escaping high pressure fluid are minimized.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: October 9, 1979
    Inventor: Henry J. Bernaerts
  • Patent number: 4141376
    Abstract: A digital system for producing a bipolar rectangular waveform of fixed frequency having a duty cycle proportional to the magnitude of an input digital word is provided to drive a servovalve. The digital word is input to a modulator which outputs a fixed frequency rectangular waveform whose duty cycle varies from 0 to 100% dependent upon the magnitude of the digital word. In order to adapt this output to drive a fail-fixed servovalve in which maximum flow occurs at a predetermined portion of maximum rated current, a scaling network is provided which limits the variation in the duty cycle of the output square wave.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: February 27, 1979
    Assignee: General Electric Company
    Inventor: Daniel J. Frey
  • Patent number: 4112960
    Abstract: A range spring sub-assembly providing a variable gradient with minimum hysteresis for the feedback assembly of a pneumatic transmitter. The sub-assembly is constituted by a helical spring whose lower end is secured to the pivoted feedback arm of the feedback assembly and whose upper end is coupled by a span adjustment screw to a fixed arm thereof. The arm porton of the screw extending above the fixed arm is engaged by a zero adjustment knob which rests on top of the fixed arm, whereby when the knob is turned, the screw is axially shifted to vary the tension of the spring coupled thereto. The span adjustment screw has a coupling terminal head that is received within the upper end of the spring and is provided with a set of outwardly projecting pins. The pins are at different heights and are interposed between adjacent convolutions of the spring whereby the pinned convolutions are rendered inactive and the convolutions therebelow remain active.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: September 12, 1978
    Assignee: Fischer & Porter Company
    Inventor: Henry M. Hermanns
  • Patent number: 4029979
    Abstract: The subject transducer consists basically of a flexible element, such as a wire, formed and supported to vibrate at a frequency depending, in part, upon the tension of the element. Means are provided to vary the tension of the element in accordance with a condition which it is proposed to monitor and a fluidic circuit is associated with the element to create a signal in accordance with the vibration of the element, the signal in turn being applied to an electric means to convert the signal into one which can actuate an electrical meter or the like. The device may be modified to include means for initially adjusting the tension of the element to set the system on zero indication and other means for adjusting the tension automatically to compensate for temperature variations.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: June 14, 1977
    Assignee: The Garrett Corporation
    Inventor: Donald W. Chapin
  • Patent number: 4010767
    Abstract: A fuel supply and distribution system is provided for a gas turbine engine wherein a plurality of flow dividing valves disposed about a manifold are positively controlled through an actuator which interconnects the flow dividing valves by linkage means extending through the manifold thus preventing sticking or seizing of the pressure regulating valves on account of contaminant particulate matter in the fuel.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: March 8, 1977
    Assignee: General Electric Company
    Inventor: Richard Henry Cornell
  • Patent number: 4003396
    Abstract: Partial pressure of oxygen in a closed gas-containing system is controlled automatically. Unique electro-mechanical transducers employ electric meter movements to vary the angle of a surface in a jet of gas in response to a signal from an oxygen sensor, thereby to vary the direction of the jet and the stagnation pressure in a receiver. The kinetic energy of the jet is maintained constant irrespective of ambient pressure by a constant differential pressure regulator. A pneumatically operated servo valve responsive to the stagnation pressure in the receiver controls the admission of oxygen to the system.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: January 18, 1977
    Inventor: Lewis W. Fleischmann
  • Patent number: 3999381
    Abstract: A pure fluid interface device for proportional linear control of high temature, high pressure, hot gas flow from the exhaust of a rocket motor. The interface device receives the hot gas by direct bleeding from the rocket exhaust system and directs the gas to the control system of a missile airframe.The proportional linear control of the interface is achieved through a pair of positive displacement pistons which engage a jet pipe, charged with the hot gas, for pivotal movement of the jet pipe for alignment of the orifice of the jet pipe with one or both exit ports in the body of the interface device to direct the hot gas through the desired exit port.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: December 28, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Ronald J. Liedel
  • Patent number: 3993101
    Abstract: An electrofluidic transducer which utilizes an electromagnetic device that is energizable by electric currents of opposite polarity to shift a fluid beam in opposite directions away from a central position. In its central position the beam deflector is between a pair of fluid nozzles, and shifts to deflect respective fluid beam from the two nozzles upon opposite energization of the electromagnet, so that three different pressure differential signals may be selectively impressed upon a pair of fluid output ports registering with the pair of fluid nozzles.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: November 23, 1976
    Assignee: The Garrett Corporation
    Inventors: Thomas B. Tippetts, Donald W. Chapin
  • Patent number: 3990824
    Abstract: Apparatus for regulating the flow of refurbishing gas or air internally to tubular film produced by the blown film process, comprising a pair of opposed arm means or arms adapted to physically contact and sense growth or diminishment in the size of the film, as determined by the spacing between the arms, the arms being independently pivotable preferably about a common axis, or alternately parallel axis closely spaced to approximate a common arc of movement, a gas flow regulating valve comprising a pressurized gas line carried by one arm, at which vicinity it is interrupted to define a gap across which the gas stream flows prior to entering the film, a flow blockage valving means comprising preferably a valve plate fixed to the opposite arm, and having changing position in said gap responsive to relative movement between the arms, the valve plate defining an opening of tapered or variable width, which depending on alignment, partially hindered alignment, or non-alignment with the gas stream, increases or lesse
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: November 9, 1976
    Assignee: The Dow Chemical Company
    Inventor: R. Douglas Behr