| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 137497000 | Responsive to change in rate of fluid flow | 34 |
| 20080295898 | Apparatus and Methods for Containing a Fuel Pressure Regulator - An apparatus includes a first portion and a second portion. The first portion includes a mounting surface configured to support a mounting portion of a pressure regulator. The first portion defines a cavity configured to receive at least a portion of the pressure regulator, and an opening configured to provide fluid communication between the cavity and an area outside of the first portion. The second portion includes a mounting surface configured to support the mounting portion of the pressure regulator. The second portion defines a cavity and an opening configured to provide fluid communication between the cavity of the second portion and an area outside of the second portion. The second portion is configured to be coupled to the first portion to form a fluid-tight seal. | 12-04-2008 |
| 20090071548 | MODULAR IN-LINE FLUID REGULATORS - Modular in-line fluid regulators are described. One described example modular fluid regulator apparatus includes a body having a fluid inlet and a threaded outer surface to engage a threaded opening in another fluid regulator to serially fluidly couple first and second fluid regulators. The example fluid regulator apparatus also includes valve to control a flow of fluid through the first fluid regulator, and a pressure sensing member operatively coupled to the valve to control a position of the valve to provide a regulated output pressure at an outlet of the first fluid regulator. The pressure sensing member and the valve are configured to be received in a cavity of the second fluid regulator adjacent the threaded opening. | 03-19-2009 |
| 20100089470 | COMBINED METERING VALVE AND PRESSURE REGULATING VALVE - A valve element combines a metering function and a pressure regulating function. A valve housing houses a metering valve. The metering valve is movable by a control to meter an amount of fluid delivered from an inlet to an outlet. A pressure regulating valve is received within the valve housing and is supplied with a pressure delivered into the inlet on a first face, and a pressure downstream of the outlet on a second face. The pressure regulating valve acts to regulate the pressure drop across the metering valve to ensure accurate fluid metering. | 04-15-2010 |
| 20100122742 | FLUID CONTROL THROTTLE VALVE - A fluid control throttle valve includes a first tube and a second tube, both of which have an inner passage respectively. Between the first and second tubes are disposed an adjusting element and a cylindrical communicating element, wherein the adjusting element has a central axis and a plurality of throttling orifices axially disposed therein. The distance between the central axis and the throttling orifices, respectively, is substantially the same with each other, while the throttling orifices are arranged radially around the central axis of the adjusting element, wherein a bore diameter of at least one throttling orifice is different from that of the other throttling orifices. In addition, the communicating element has a through hole axially disposed therein. The communicating element is axially rotatable with respect to the central axis of the adjusting element, wherein the through hole thereof selectively communicates a selected throttling orifice. | 05-20-2010 |
| 20100294381 | FLUID FLOW REGULATOR - A fluid flow regulator includes a valve assembly defining a fluid passage. The fluid passage includes a first port, a second port, a sensing orifice disposed between the first and second ports, a first orifice disposed between the first port and the sensing orifice and a second orifice disposed between the sensing orifice and the second port. A first flow area of the first flow orifice varies in response to differential pressure across the sensing orifice as fluid flows through the fluid passage in a first direction from the first port to the second port. The first flow area is fixed as fluid flows through the fluid passage in an opposite second direction. A second flow area of the second orifice is fixed as fluid flows through the fluid passage in the first direction and varies as fluid flows through the fluid passage in the second direction. | 11-25-2010 |
| 20120298221 | MASS FLOW CONTROLLER SYSTEM - A mass flow controller with high accuracy flow rate output control is disclosed. In the mass flow controller, relation data that indicates a corresponding relation between a flow rate of a reference gas and a CF value of a sample gas is stored, a target flow rate is converted into a reference gas flow rate by the use of a predetermined CF value, a sample gas flow rate is calculated from the converted reference gas flow rate and a CF value corresponding to the reference gas flow rate, the sample gas flow rate is compared with the target flow rate, and the CF value that is used for conversion of the reference gas flow rate or calculation of the sample gas flow rate is updated by the use of the corresponding relation based on the error between the sample gas flow rate and the target flow rate. | 11-29-2012 |
| 20130061955 | HYDRAULIC VALVE WITH PRESSURE LIMITER - An assembly of valve sections | 03-14-2013 |
| 20130228239 | Pressure Equalizing Device and Receptacle - Provided is a pressure equalizing device for facilitating drug reconstitution in a closed system. The pressure equalizing device includes a container for attachment to a receptacle, to permit pressure equalization between the container and the receptacle. The container includes a first chamber and a second chamber. The device further includes a vent channel extending between the first chamber and a distal opening of the vent channel. In accordance with the invention, when the receptacle is connected to the pressure equalizing device, the vent channel establishes direct fluid communication between the first chamber and the receptacle. Additionally, a longitudinal axis of the pressure equalizing device is configured to be aligned with or parallel to a longitudinal axis of the receptacle when the pressure equalizing device is attached to the receptacle. | 09-05-2013 |
| 20150316934 | FLOW RATE CONTROLLER FOR HIGH FLOW RATES AND HIGH PRESSURE DROPS - A flow rate controller is disclosed that maintains constant flow rate with changes in pressure drop across the valve by maintaining a constant pressure drop across a restrictor with the aid of a spring balanced piston that mates a cone to a seat to dissipate the majority of pressure drop across the valve. | 11-05-2015 |
| 137498000 | Valve closes in response to excessive flow | 4 |
| 20090255592 | Reverse Action Flow Activated Shut-Off Valve - A flow activated valve includes an outer body and a piston disposed in an inner cavity of the outer body. The flow activated valve also includes one or more fluid passage exits in the outer body and one or more piston fluid passages in the piston. The one or more fluid passage exits and the one or more piston fluid passages allow fluid flow out of the valve. The flow activated valve also includes a flow restriction member disposed in a piston inner cavity. In addition, the flow activated valve includes a shear member disposed in the outer body, and a bias member disposed in an inner cavity of the outer body. The flow activated valve further includes a position control member disposed in the piston and a sealing member. | 10-15-2009 |
| 20100108160 | FEATHER GASKET FOR AN EXCESS FLOW VALVE - The invention is directed to an excess flow valve having a feather gasket positioned near a valve seat. The excess flow valve also has a piston assembly with a first disc-shaped piston and a second disc-shaped piston. Each piston also has at least one orifice defined therein and has an upstream face and a downstream face. In one embodiment, the excess flow valve has a spring positioned in the housing against the downstream face of the second piston such that the spring exerts a force on the second piston in a direction opposite the general fluid flow direction. When flow forces acting on the piston assembly sufficiently exceed the spring force acting on the second piston, the piston assembly moves in the flow direction until a stop engages a valve seat to shut off fluid flow through the valve. The feather gasket reduces a bypass flow past the valve seat. | 05-06-2010 |
| 20130037132 | Pressure-control Valve - A pressure-control valve includes a housing ( | 02-14-2013 |
| 20160033051 | SHUTOFF VALVE ASSEMBLY - A shutoff valve assembly includes a shutoff valve, an extension tube extending from the shutoff valve and an excess flow valve located at a lower end of the extension tube. The excess flow valve includes a valve member in a normally open position and responsive to flow into the excess flow valve to close the excess flow valve. A tubular body of the excess flow valve receives the valve member and defines a radial gap between an inner diameter of the tubular body and an outer diameter of the valve member, where the radial gap is uniform over an axial distance between the open position and a closed position of the valve member. The shutoff valve assembly may be used in combination with a fluid storage tank for storing fluid and an excess flow valve inlet may be disposed adjacent an internal bottom surface of the tank. | 02-04-2016 |
| 137500000 | Expansible chamber subject to differential pressures | 18 |
| 20080271791 | Automated mechanical constant flow valve for air ducts - A constant flow valve is provided including a housing having a central flow passageway. The housing further includes an inlet portion, a cylindrical body portion, a frusto-conical valve portion, and an outlet portion. An obstruction plate is positioned within the housing so as to be longitudinally moveable upon a guide rod. The obstruction plate is biased by a spring for biasing the obstruction plate axially towards the inlet portion and away from the frusto-conical valve portion. The spring exerts a force against air flowing into the inlet and through the central flow passageway so as to maintain a constant flow rate due to increased pressure differential causing the obstruction plate to move axially into the frusto-conical valve portion. Preferably, the constant flow valve includes means for adjusting the biasing means. | 11-06-2008 |
| 20080302428 | Pressure-reducing valve - A pressure-reducing valve includes a housing, a pressure-reducing piston, a driving piston, and a spring mechanism. The housing is provided with a primary port and a secondary port. The pressure-reducing piston is displaceably retained in an interior of the housing. The pressure-reducing piston is displaced to control an opening degree of the primary port and configured to separate the interior of the housing into a primary-pressure space connected to the primary port and a secondary-pressure space connected to the secondary port. The driving piston is displaceably retained in the interior of the housing. The driving piston is displaced to cause the pressure-reducing piston to be displaced in association therewith and has a secondary-pressure receiving surface that receives a secondary pressure from a fluid in the secondary-pressure space. The spring mechanism is configured to exert a spring force against the secondary pressure to at least one of the pistons. | 12-11-2008 |
| 20090301580 | CONSTANT FLOW VALVE - A valve for maintaining constant fluid flow under conditions of a specified operating inlet pressure and varying inlet pressures in excess of the specified pressure includes a tubular valve body having a fluid flow channel extending between an inlet and outlet. The fluid flow channel includes a first flow path having a first variable volume and cross-sectional area, and a second flow path having a second variable volume and cross-sectional area. The valve further includes an fluid discharge orifice whose cross-sectional area less than the minimum of the first or second variable cross-sectional areas. If the inlet pressure is above or below the specified operating pressure, the variable volumes are caused to change to maintain a substantially constant fluid flow from the valve. | 12-10-2009 |
| 20130248020 | EXPANSION VALVE WITH VARIABLE OPENING DEGREE - An expansion valve ( | 09-26-2013 |
| 20140366965 | INTEGRAL FILTER AND REGULATOR FOR VALVE - A valve assembly comprises a closure element disposed in a flow control duct, a fluid-driven actuator assembly, a shaft operable to translate linear movement of the actuator assembly into rotation of the closure element, and an integral filter and pressure regulator unit disposed in line with an actuator fluid supply passage. The actuator fluid supply passage extends between the flow control duct and the actuator assembly. The integral filter and pressure regulator unit includes a regulator housing having at least one cylindrical wall surrounding a vent cavity and a regulator cavity. Filter media is secured to the regulator housing and is disposed across a regulator orifice in communication with the regulator cavity. | 12-18-2014 |
| 20160054740 | FLOW CONTROLLER - A flow controller for a heating system with a housing, which has an inlet connection for a heating medium, an outlet connection for the heating medium, and a preadjustment connection, with a rate regulating module, and with a handle, which acts together with a movably disposed structural element of the rate regulating module to preadjust the flow. To change the preadjustment of the flow via the handle, an effective cross section of a first flow-through opening for the heating medium can be adjusted and to regulate the preadjusted flow of the heating medium, a sleeve of the rate regulating module and a cup of the rate regulating module are disposed axially movable to one another. The inflow to the rate regulating module occurs on an outer side via the first flow-through opening which is provided on the sleeve and upstream of the second flow-through opening. | 02-25-2016 |
| 137501000 | Pressures across fixed choke | 7 |
| 20080216903 | FLOW REGULATOR - A flow regulator including a body that includes a first flow passageway and a second flow passageway, and a deformable blocking element disposed in the body, the deformable blocking element deforming due to pressure of fluid flow thereagainst, wherein the deformable blocking element is arranged to variably block the first flow passageway in accordance with its deforming due to pressure of fluid flow thereagainst, and wherein the deformable blocking element does not block fluid flow through the second flow passageway. | 09-11-2008 |
| 20090133759 | Hydraulic restrictor - A hydraulic restrictor comprising: a passage along which hydraulic fluid flows; a member which extends along said passage, said member restricting the flow along the passage; and means for selectively securing said member at a plurality of different positions along the passage thereby to enable variation in the restriction on flow along the passage, said securing means securing said member at each said position by securing the member against the side wall of the passage. | 05-28-2009 |
| 20100276013 | FLOW CONTROL VALVE - In one embodiment, a constant-flow valve assembly is provided that comprises a first fluid passageway carrying fluid at a first fluid pressure, a piston chamber, and a second fluid passageway connected to the chamber and carrying fluid at the second fluid pressure. A third fluid passageway is configured to carry fluid at a third fluid pressure. An adjustable valve member is provided between the chamber and the third passageway to provide constant fluid flow to the third passageway. An adjustable restrictor assembly is positioned between the first and second fluid passageways. An inlet portion of the restrictor assembly receives fluid at the first fluid pressure and directs the fluid to a restrictor. An outlet portion receives fluid from the restrictor and directs the fluid to the second fluid passageway at the second fluid pressure. The restrictor is movable to adjust the position of entry and exit portions relative to the inlet and outlet portions to adjust a fluid flow rate through fluid pathway to the second fluid passageway, thereby adjusting the flow rate through the valve assembly. | 11-04-2010 |
| 20120279585 | FLOW CONTROL VALVE - A constant-flow valve assembly having a first passageway carrying fluid at a first pressure, a piston chamber, and a second passageway connected to the chamber and carrying fluid at the second pressure. A third passageway carries fluid at a third pressure. An adjustable valve is between the chamber and the third passageway, and an adjustable restrictor is positioned between the first and second passageways. An inlet portion of the restrictor assembly receives fluid at the first pressure and directs the fluid to a restrictor, and outlet portion directs the fluid to the second passageway at the second pressure. The restrictor is movable to adjust the position of entry and exit portions relative to the inlet and outlet portions to adjust a fluid flow rate to the second passageway to adjust the flow rate through the valve assembly. | 11-08-2012 |
| 20120312394 | COMPENSATED PRESSURE REDUCTING DEVICE - There is described a device for reducing the delivery pressure of a combustible gas, particularly for systems supplying gas to internal combustion engines for automotive vehicles, comprising a valve seat ( | 12-13-2012 |
| 20130008529 | Continuous Flow Regulator for Vehicle Heating Systems - A continuous flow regulator for vehicle heating systems includes a body configured to be connected in-line with coolant flowing through the heating coil of the heating system. A spring biased ball valve assembly is disposed in the body and is configured to restrict flow through the regulator in response to increasing flow rate of coolant and to open flow through the regulator in response to decreasing flow rate of coolant. Flow rate of coolant is therefore continuously adjusted and regulated to protect the heater core from corrosion due to high coolant flows therethrough. | 01-10-2013 |
| 20130074955 | FLUID VALVE ARRANGEMENT - A pressure controlling valve includes a slidable spool arranged to be spring loaded towards a neutral position. A first port and a second port are connected to allow a fluid flow through the valve. A first and a second pilot port are connected to a cavity adjacent a respective first and second end surface of the spool. The pilot ports are connected to a fluid conduit on either side of a fluid device causing a pressure drop in the fluid conduit and the fluid device is connected to one of the first or second ports. The spool is displaced against the spring load in response to a pressure difference between the first and the second pilot port, whereby a control surface of the spool is arranged to restrict the fluid flow through the valve when the control surface approaches a central cavity. | 03-28-2013 |
| 137502000 | With Venturi tube having a connection to throat | 1 |
| 20130233411 | Venturi Valve and Control System - Embodiments of the invention provide a venturi valve and control system for use in an indoor environment to regulate air flow. The venturi valve includes a substantially cylindrical pipe, a high pressure sensing assembly, a low pressure sensing assembly, a differential pressure transducer, and a damper assembly. The high pressure sensing assembly and the low pressure sensing assembly do not substantially impede air flow through the valve. A controller is connected to the differential pressure transducer and a damper actuator. The controller determines a current flow rate of air into the indoor environment and operates the damper actuator in order to provide a desired flow rate of air into the indoor environment. | 09-12-2013 |
| 137503000 | Pressures across flow line valve | 4 |
| 20080196774 | CONSTANT FLOW RATE VALVE - A constant flow rate valve has a housing in which a rotatable sleeve is positioned between the valve's inlet and outlet. Apertures in the sleeve move into alignment with the valve's inlet and outlet upon sleeve rotation to establish the fluid flow rate. A piston is movable longitudinally within the sleeve bore. The piston has openings which align with the apertures in the sleeve upon longitudinal motion of the piston. Pressure ducts connect each end of the sleeve to the inlet and outlet. The piston moves in response to relative pressure changes in the inlet and outlet communicated by the pressure ducts. The area of overlap between the piston's openings and the sleeve's apertures varies with piston motion to ensure a constant flow rate in spite of relative inlet and outlet pressure changes. The ends of the sleeve are in fluid communication to control the response sensitivity of the piston. | 08-21-2008 |
| 20090173399 | CONSTANT FLOW VALVE - An object of the present invention is to provide a constant flow valve able to make the flow rate constant at all times even if the upstream and downstream side fluid pressure of the valve fluctuates for a large flow rate fluid and able to set the flowing fluid to any flow rate. | 07-09-2009 |
| 20110017322 | Flow-Volume Regulator - A fluid flow regulator includes a regulating profile which is either centrally or peripherally disposed within the flow rate regulator, and an annular restrictor which is made of an elastic material. In a functional position of the flow rate regulator, the restrictor delimits a control gap between itself and the regulating profile. In a starting position of the flow rate regulator, the flow rate regulator has an unrestricted flow cross section that is larger than the control gap. The unrestricted flow cross section of the flow rate regulator is variable by a deformation of the restrictor in response to a pressure differential that is generated when a fluid flows through the flow rate regulator. The relative position of the restrictor and the regulatory profile is variable, and moveable against a reset force, into the functional position from the starting position, in response to a flow of fluid within the flow rate regulator. The reset force may be provided in the form of a spring. | 01-27-2011 |
| 20150101686 | FLOW CONTROL VALVE AND FLOW CONTROL SYSTEM USING SAME - A flow control valve has a valve body part which has a pressure differential device part and a valve seat, a first diaphragm which defines first and second chambers, a second diaphragm which defines third and fourth chambers and is provided with a valve element, a first moving part which advances and retracts together with the first diaphragm, and a second moving part which advances and retracts together with the second diaphragm; the second chamber and the fourth chamber form between them a connecting chamber, an intermediate transmission member which transmits movements of the first and second moving parts to each other is arranged, and a pressure differential control valve element which advances and retracts with respect to the pressure differential opening part and a pressure differential control valve element advancing/retracting means for making the pressure differential control valve element advance and retract are provided, and a flow control system using the same. | 04-16-2015 |
| 137504000 | Movable deflector or choke | 3 |
| 20140014200 | THROUGHFLOW RATE LIMITING DEVICE - A throughflow rate limiting device with a spring-loaded valve body which is disposed upstream of a cross-sectional constriction in a flow duct so as to be axially slideable between a first and a second position. The valve body is loaded by a spring in the direction of the first position, and for a given pressure gradient throughflow in the first position is greater than in the second position. The cross-sectional constriction may be bypassed by at least one bypass line which branches off from the flow duct upstream of the cross-sectional constriction and rejoins the flow duct downstream of the cross-sectional constriction. In order to achieve small flow resistance in the open state and abrupt switching, the valve body has the shape of a double cone. | 01-16-2014 |
| 20140246102 | FLOW CONTROL VALVE - A flow control valve includes a housing that includes a fluid inlet and a fluid outlet; a valve body that together with the housing, forms a first chamber with a variable volume and a second chamber with a variable volume; a communication passage that connects the first chamber and the second chamber together; and an urging portion that urges the valve body in a direction in which the volume of the first chamber decreases. When the valve body moves in a direction to increase the volume of the first chamber against urging force of the urging portion, the valve body moves closer to the fluid outlet and reduces a degree to which the second chamber is communicated with the fluid outlet. | 09-04-2014 |
| 20140332097 | FLOW-VOLUME REGULATOR - The invention relates o a flow-volume regulator ( | 11-13-2014 |
