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| Number | Title | Issue Date |
| 7997300 | Aerosol inlet flow modulator A flow modulator to control the flow of an aerosol to an aerosol detection and/or monitoring system and other aerosol flow systems includes a chamber having an inlet and an outlet, a diverging section of the chamber beneath the inlet that has a flow divider at the c... | 08/16/2011 |
| 7370675 | Flow conditioner for a fluid transport pipe The flow conditioner for a fluid transport pipe, comprises a support-forming substantially tubular main body, at least one flow rectifier disposed inside the main body essentially perpendicularly to the axis XX′ thereof, and a porous plate disposed inside the main... | 05/13/2008 |
| 7287540 | Method for introducing drag reducers into hydrocarbon transportation systems Disclosed is a method of reducing drag in a fluid stream. The method includes admixing the components of a drag reducer to form an incipient drag reducer and injecting the incipient drag reducer into the fluid stream wherein the drag reducer components are admixed a... | 10/30/2007 |
| 7225829 | Flow-control valve assembly A first expression of a flow-control valve assembly includes a valve body and a resilient flow control positioned in the valve body. The valve body has a valve seat including a radially-inner valve seat portion, a radially-outer valve seat portion and a bypass-flow-... | 06/05/2007 |
| 7210495 | Gas line safety valve system A safety valve system includes a control valve connected to a gas meter and intersecting a gas flow path downstream of the gas meter and upstream of an entry point of a building. The control valve is adaptable between open and closed positions based upon received st... | 05/01/2007 |
| 7128089 | Flow control providing stable fluid flow An electro-mechanical variable fluid flow restrictor includes a support having a passage and a seal surface, a deformable seal that is engageable with the seal surface, and a bias member for exerting an electronically controlled variable bias against the deformable ... | 10/31/2006 |
| 6962167 | Choke valve A choke valve having a coarse setting choke means and a fine setting choke means placed in parallel to it. The coarse setting choke means is able to be switched over in stages between different degrees of choking with different choke cross sections. The fine setting... | 11/08/2005 |
| 6957577 | Down-hole pressure monitoring system A non-electric down-hole formation pressure monitoring system utilizing a typical down-hole chemical injection system for pressure data acquisition used with surface computer integration to produce an accurate picture of formation pressure variations utilizing press... | 10/25/2005 |
| 6871666 | Bi-directional dual chamber orifice fitting Methods and apparatus for a bi-directional dual chamber orifice fitting comprising a body with a chamber in fluid communication with a flow bore. The fitting also comprises an orifice supported by an orifice plate carrier that is selectably disposable in the bore. I... | 03/29/2005 |
| 6719007 | Amplitude attenuation of time-variant properties of fluid streams Apparatus for attenuating the amplitude of a time-variant property of a fluid stream which comprises an enclosed volume, wherein the enclosed volume includes a mixing zone having an inlet and three or more outlets; piping means for introducing an inlet fluid stream ... | 04/13/2004 |
| 6612321 | Damping valve for power steering In a damping valve for pressure medium-actuated operating circuits, a spring element is installed between housing, cover and counter-contour. In the opening direction, the spring element is pressed against the counter-contour by the pressure medium flowin... | 09/02/2003 |
| 6607006 | Amplitude attenuation of time-variant properties of fluid streams A method to reduce or attenuate the amplitude of time-variant properties of a fluid stream by introducing the stream into a defined enclosed volume in a controlled manner such that the residence time distribution of the fluid exiting the enclosed volume a... | 08/19/2003 |
| 6591851 | Seal-gas valve device During the pumping of corrosive gases, it is advantageous to admit a seal gas to endangered pumping chambers at a lower flow rate and a higher pressure than the corrosive gases. Inert gas from a supply (3) has its pressure reduced by a pressure reducer (6... | 07/15/2003 |
| 6581623 | Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels An auto-switching sub-atmospheric pressure gas delivery system, for dispensing gas to a gas-consuming process unit, e.g., a semiconductor manufacturing tool, without the occurrence of pressure spikes or flow perturbations.... | 06/24/2003 |
| 6575189 | Automatic valve An automatic valve includes a housing having an inlet passage and a passage to outlet, a linearly movable shaft disposed in the housing having two stops separated by a predetermined distance, a hydraulic unit connected to the housing and to the linearly m... | 06/10/2003 |
| 6467753 | Sealing joint and casing, especially for a stopcock actuator Stopcock actuator casing, comprising a base (1) having an underside and formed with a hole (2), the underside of the base being subdivided into at least three compartments (4,8,10), the first (4) of which surrounds the hole (2) and the second (8) and thir... | 10/22/2002 |
| 6289930 | Refrigerant expansion device having combined piston orifice valve and solenoid-actuated closure A refrigerant expansion valve for an air conditioning system is combined with a solenoid-actuated closure device in a common housing. The housing provides for placement of the solenoid valve in a position to shut off fluid flow across the expansion device... | 09/18/2001 |
| 6247495 | Flow rate detection mechanism with a restriction element for mass flow meters A flow proportioning assembly for dividing a portion of a fluid flow such as gas for presentation to a sensor includes a holder member having a central opening and forming an exterior peripheral passageway when inserted within a conduit of a flow meter ho... | 06/19/2001 |
| 6007421 | Temperature control device The air mixing device, for use in an air conditioning apparatus or a vehicle heater system as a flow control device which consists of at least two flap members, the flap members being mutually independently movable between first and second positions in wh... | 12/28/1999 |
| 5938425 | Method and device for control of the flame size of gas-fired cooking or baking appliances A device and a method for the controlled reduction of the gas flow Q fed to a burner nozzle of a gas-fired cooking or baking appliance via a gas supply pipe. The gas supply pipe is branched into a number n of partial gas pipes connected in parallel, throu... | 08/17/1999 |
| 5887786 | Passive injection system used to establish a secondary system temperature from a primary system at a different temperature A passive injection system for a hydronic heating system having a primary loop and a secondary loop is described. The passive injection system establishes a secondary temperature in the secondary loop significantly different from the temperature of the pr... | 03/30/1999 |
| 5404945 | Device for controlling the flow of fluid in an oil well A device is provided for controlling fluid flow in oil well casings or drill pipes. The device defines a flowpath for fluid through a casing section or drill pipe with the flowpath including a throttling valve which restricts or prevents the flow of fluid... | 04/11/1995 |
| 5282487 | Flow control system Existing devices for controlling flow in water and wastewater treatment systems utilize mechanical valves, adjustable height weirs and gates which are expensive to manufacture and maintain, and in some circumstances such as during winter, difficult to ope... | 02/01/1994 |
| 5148830 | Flow control device A flow control device including a body having an annular flange formed in a middle portion, a pair of sealing rings engaged on the body, two apertures formed in the body and located between the sealing rings, a plug and a spring received between the annul... | 09/22/1992 |
| 5125323 | Pressurized oil supply/discharge circuit and valve device for use in such circuit A check valve (14) with a valve opening actuator and a bypass passage (16) are disposed in parallel in a pressurized oil supply/discharge passage (3) connected in communication with a hydraulic actuation chamber (2). A residual pressure holding valve (17)... | 06/30/1992 |
| 5099881 | Flow dividing structure of mass flow controller A flow dividing structure for a mass flow controller includes a base having a main passage which includes an upsream circular passage, a downstream circular passage, and a tapering circular passage which connects the upstream and downstream circular passa... | 03/31/1992 |
| 5097747 | Pilot adjuster-connector for adjusting the speed of pneumatic pressure cylinders The invention discloses a controlled connector-adjuster permitting two different speeds in the same stroke of a double-acting pneumatic pressure cylinder. In the absence of a control signal at the orifice (13) of the apparatus, the escape pressure from th... | 03/24/1992 |
| 5042448 | Idle air bypass A valve assembly of novel configuration is associated with the main air induction passage of a fuel-injected, spark-ignited, automotive internal combustion engine for the purpose of regulating the idle air flow. The valve assembly has an inlet connected u... | 08/27/1991 |
| 4930934 | Surface, subsurface, continuous feed moisture maintenance system apparatus and method A surface, subsurface continuous feed moisture maintenance system for microscopic volume irrigation utilizing a preset flow rate valve, provided in a single preset flow rate stage or multiple preset flow rate stages, a moisture actuated sensor valve and a... | 06/05/1990 |
| 4917535 | Pressure compensating flow rate control device with dual operating modes A pressure compensating flow rate control device includes a one-piece molded plastic body having an external surface with a recessed inlet port for receiving a fluid and a recessed outlet port for discharging a fluid. First and second passages are defined... | 04/17/1990 |
| 4887641 | Modified parallel blade damper for an air handling system A multiple blade damper for an air handling system of the type in which at least an adjacent pair of blades of the damper are operated in parallel, that is, in which each of such pair of blades is oscillated in the same direction as the other of the pair ... | 12/19/1989 |
| 4858636 | Preset microscopic flow valve apparatus and method A pressure-compensating, self-flushing, preset flow valve utilizing an emitter for maintaining a continuous microscopic flow of water at a specified continuous rate. The valve includes a housing adapted with an inlet chamber and an outlet chamber and a pr... | 08/22/1989 |
| 4858647 | Attitude-insensitive, by-pass sensor Disclosed is a valve having a body having an inlet channel, an outlet channel in fluid communication with the inlet channel, and a flow-monitoring region situated medially between the inlet and outlet channels. Further provided within the body is a second... | 08/22/1989 |
| 4757943 | Method and apparatus for controlling the temperature of a liquid A liquid temperature controlling method and apparatus are provided in which on/off valves are utilized. The on/off valves are housed in a compact manifold assembly having a number of channels through which hot and cold water flows to and from the valves. ... | 07/19/1988 |
| 4722363 | Additive injection system for fluid transmission pipelines A system for injecting fluid additive into a fluid transmission pipeline including a branch conduit in communication with the pipeline, a pump in the branch conduit for raising the pressure of fluid withdrawn from the pipeline, and an eductor having a bra... | 02/02/1988 |
| 4698998 | Pressure calibration systems and control valve assemblies High-pressure, micrometering valves requiring low-actuating torque are combined in a lightweight, portable pressure calibration console, housed in a common valve block. A manual pressure valve and a manual vent valve connect compressed gas from an interna... | 10/13/1987 |
| 4662401 | High pressure choke assembly A pressurized fluid is "let-down" to atmospheric pressure as it passes through a choke assembly having two pressure orifices (choke flow beans) which are in-line and directly opposite and which are designed to deliver jet streams of generally equal force ... | 05/05/1987 |
| 4655240 | Hydraulic volumetric proportioning valve A hydraulic volumetric proportioning valve which may be installed in pre-existing hydraulic systems such as aircraft landing gear extension and retraction systems to independently regulate and vary the rate of hydraulic system operation at desired stages ... | 04/07/1987 |
| 4643224 | Alarm test device for a sprinkler system An alarm test device for a sprinkler system incorporates test and drain valves, together with a sight glass and a metering orifice into a single test valve, with the option of employing a plug valve as the test and drain valves, and the further option of ... | 02/17/1987 |
| 4573441 | Valve arrangement An improvement is disclosed for a valve arrangement for adjusting the idling speed of an engine of the type having an intake manifold and a throttle valve in the manifold. In this arrangement there is a bypass of the throttle valve, and an electromechanic... | 03/04/1986 |
