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| Number | Title | Issue Date |
| 7327634 | Rotary pulser for transmitting information to the surface from a drill string down hole in a well A rotary pulser for transmitting information to the surface from down hole in a well by generating pressure pulses encoded to contain information. The pressure pulses travel to the surface where they are decoded so as to decipher the information. The pulser includes... | 02/05/2008 |
| 7327045 | Fuel delivery system and method providing regulated electrical output In a mobile fuel delivery vehicle, providing bulk aircraft fuel from a pressurized fuel reservoir to an aircraft, a method of regulating electrical output of an electrical power source, includes the steps of: (a) receiving, in a fluid path, the bulk aircraft fuel fr... | 02/05/2008 |
| 7273062 | Shut-off valve for preventing the flow of liquid through a conduit, and related processes A shut-off valve for preventing the flow of liquid through a conduit is described herein. The valve includes a valve body which defines a fluid passage, a portion of which can be venturi-shaped. The valve also includes a flow barrier which has a dimension sufficient... | 09/25/2007 |
| 7201231 | Apparatuses and methods for deploying logging tools and signalling in boreholes The apparatus includes a pump for circulating pressurized fluid in a wellbore. A control device controls the pump which a conduit interconnects to the wellbore. A downhole transducer detects changes in fluid pressure at a downhole location and generates signals acco... | 04/10/2007 |
| 7195032 | Unidirectional, adjustable flap valves The invention provides a flap valve for controlling the air pressure within a protected space defined by walls, the flap valve including a valve frame attachable to an opening made in the walls, a valve flap, articulated at least indirectly to the frame and being su... | 03/27/2007 |
| 7059325 | Vent assembly A vent valve apparatus (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal. The apparatus (10) includes a gas washout vent (15), a vent valve (18) adapted to progressively re... | 06/13/2006 |
| 6889700 | Method and apparatus for fluid flow control Methods and apparatus are provided for modulating a flow of fluid in a duct using a rotating member that rotates in the duct. A sensing unit senses the rotation speed of the rotating member and generates a rotation signal as a function of the sensed rotation speed. ... | 05/10/2005 |
| 6889692 | Vent valve assembly A vent valve apparatus for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal includes a gas washout vent, a vent valve adapted to progressively restrict the flow area of the washout vent, and a pressure sensit... | 05/10/2005 |
| 6557555 | Vent valve apparatus A vent valve apparatus for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal includes a gas washout vent, a vent valve adapted to progressively restrict the flow area of the washout vent, and a pres... | 05/06/2003 |
| 6066043 | Oscillating baffle for airflow redirection and heat transfer enhancement Disclosed is an apparatus and method to redirect airflow and enhance heat transfer using an oscillating baffle. This apparatus and method allows for the improved efficiency of a heat transfer tunnel, while reducing the size of the tunnel. Several embodime... | 05/23/2000 |
| 5927400 | Device and method for the adjustment of the flow rate of a liquid, with closed loop control A device is described, for the adjustment of the flow rate of a liquid which circulates within thermal convectors or heat exchangers making up part of heating, conditioning or ventilation plants, or apparatus for the thermal treatment of products. The dev... | 07/27/1999 |
| 5509443 | Pressure regulator for industrial process exhaust system A pressure regulator for an industrial process system is connected between the industrial process equipment and pollution control equipment and exhibits a pressure inversely related to pressure changes in the pollution control equipment so as to maintain ... | 04/23/1996 |
| 5409034 | Electrically actuated valve for a pressurized fluid An electrically actuated valve for control of a pressurized fluid, particularly a sanitary valve, comprises a rotor (15) arranged in a housing (1) between an inlet passageway (6) and an outlet passageway (7). The rotor (15) is rotatable under the action o... | 04/25/1995 |
| 5406977 | Automatic flowrate regulator for ventilation and air-conditioning installations This invention relates to an automatic flowrate regulator for ventilation and air-conditioning installations, wherein it comprises a rigid flap articulated in the body and which is subjected, on the one hand, to elastic means, on the other hand, to the pr... | 04/18/1995 |
| 5398728 | Volume flow regulator for air conditioning and ventilation apparatus A volume flow controller for air conditioning and ventilation apparatus which has a pivotable flap in a flow duct whose pivot shaft has a lever arm and which is articulated to a spring. To provide a mechanically self-actuating volume flow controller, in w... | 03/21/1995 |
| 5348449 | Airflow regulator A passive aspirator based on the Venturi effect has a pivotable flap in the inlet portion of a first air passage. The flap reduces the air flow through the passage when high pressure is present. A spring biases the flap toward an open position. Increasing... | 09/20/1994 |
| 5044394 | Apparatus for regulating am outflow An apparatus for regulating or controlling the outflow from a rain tank, a rain overflow, etc. contains a slide which, by a drive mechanism, can close the outlet line from the tank. The position of the slide is controlled by a control mechanism. The contr... | 09/03/1991 |
| 4986321 | Fuel dispensing nozzle having a flow rate limiter A fuel dispensing nozzle for gasoline fuel pumping stations and the like has an inlet through which the fuel is supplied within a range of inlet pressures, an outlet from which fuel is discharged and a flow passage having valving for selectively opening c... | 01/22/1991 |
| 4951722 | Fuel dispensing nozzle having a flow rate limiter A flow rate limiting device (40) for a fuel dispensing nozzle (10) having an inlet (12) through which fuel is supplied to said nozzle (10) from a supply hose (14) and an outlet (20) from which fuel is discharged, as into a tank of a vehicle. The device (4... | 08/28/1990 |
| 4905724 | Metering valve for heparin or the like A material regulating valve which controls the flow of an additive material into a primary material as a function of the volume, flow rate, and viscosity of the primary material. The device is comprised of a two sectioned body with a primary flow path and... | 03/06/1990 |
| 4844113 | Fluid flow safety valve An automatic shut-off safety valve comprising a movable poppet held in a stable position by magnets and a movable weight. On the occurrence of an abnormal condition, such as a seismic event, the movable weight is displaced and gravity carries the poppet d... | 07/04/1989 |
| 4785840 | Method of and apparatus for controlling material flow The passage of ore through a pass is controlled by means of a rotatably mounted arcuate door which is orientated so that a convex face of the door faces oncoming material flow. When the rate of material flow is so high that the door is forced open, fins o... | 11/22/1988 |
| 4785300 | Pressure pulse generator An improved acoustic signal generator has rotor and stator elements, each having a plurality of radially-extending lobes and intervening ports relatively positioned and configured to establish fluid dynamic forces that bias the generator into an open posi... | 11/15/1988 |
| 4694851 | Flow regulator and its use The invention concerns a flow regulator, intended for gaseous substances, in particular for air in air-conditioning and ventilation installations, for maintaining the volumetric flow of the gaseous substance at desired magnitude with sufficient accuracy w... | 09/22/1987 |
| 4678005 | Flow regulator The present invention concerns a flow regulator for gaseous substances, particularly a flow regulator intended for air in air-conditioning and ventilation installations, for maintaining the volumetric flow of the gaseous substance at desired magnitude wit... | 07/07/1987 |
| 4674531 | Flow regulator The present invention concerns a flow regulator for gaseous substances, particularly a flow regulator intended for air in air-conditioning and ventilation installations, for maintaining the volumetric flow of the gaseous substance at desired magnitude wit... | 06/23/1987 |
| 4523609 | Volume flow or pressure regulating device A volume flow or pressure regulating device is described which is especially suitable for air conditioning or air heating systems. The device transmits a torque moment function onto the flap control shaft in response to the flap angle. The device includes... | 06/18/1985 |
| 4501261 | Instantaneous gas water heater Hot water supply temperature is set by a temperature setting device in response to an instantaneous flow rate signal from a water flow rate sensor arranged in a water supply pipe and a feeding water temperature signal from a feeding water temperature sens... | 02/26/1985 |
| 4491148 | Automatic choke valve An automatic storm choke valve having two vertically spaced-apart valve members movable longitudinally within a valve housing to open and close the valve. A pair of vanes pivotally affixed to an upper valve member at its lower end are kept in a preset obl... | 01/01/1985 |
| 4488575 | Volume flow regulator for ventilation systems The invention concerns a volume flow regulator for ventilation systems with a conduit section (1) in which a regulating part (3) is pivotably mounted about an axle (2) which bisects the conduit cross section, whereby the regulating part (3) has a basicall... | 12/18/1984 |
| 4340083 | Deflectable beam valve A valve includes a piezoelectric bar mounted as a cantilevered beam. The free end of the bar is mounted for movement toward and away from a valve seat surrounding a control opening. The beam is initially flexed when in the closed position so as to maintai... | 07/20/1982 |
| 4289161 | Fluid flow regulator A fluid flow regulator wherein a shaft which extends transversely of the passage in a tubular housing carries a flap having two mutually inclined sections. A spring biases the flap to a fully open position and the flap is moved from such open position tow... | 09/15/1981 |
| 4265268 | Modulating flow control valve assembly A modulating flow control valve assembly having a bypass extending from the face of the valve through the valve and the means by which the valve is mounted within the valve body. As the valve moves within the valve body in response to fluid demands, the a... | 05/05/1981 |
| 4246918 | Method and apparatus for forced air balancing of damper blades The present invention encompasses a method and apparatus for assisting in the operation of air control dampers. An air deflector is positioned downstream from a rotatable damper in an air conduit. The deflector is positioned to direct air moving over one ... | 01/27/1981 |
| 4222408 | Check valve A check valve having a body with a passage therethrough, a pair of vanes pivotally mounted within said passage so that they open and close flow therethrough responsive to flow in one direction, said vanes having an arcuate shape to create a smooth venturi... | 09/16/1980 |
| 4214607 | Unidirectional flow limiter Unidirectional flow limiter housed in a union between a pipe and a user apparatus, comprising a first channel, a second channel, a flow reduction member between the two channels, a third channel, a non-return valve in the third channel and constituted by ... | 07/29/1980 |
| 4197809 | Flow responsive device A flow responsive device for use in a fluid flow system to establish a signal when a predetermined flow rate is attained within a flow conduit. The device is adapted for connection to a flow conduit and has a target vane adapted for insertion within the f... | 04/15/1980 |
| 4188144 | Mechanism for holding and guiding a pivoting member A pivoting member, especially the air flow rate meter of an internal combustion engine is disposed on a hub which surrounds a locally fixed shaft. Extending inwardly from the hub is a protrusion, for example a pin, which penetrates an opening in the wall ... | 02/12/1980 |
| 4185653 | Liquid metering and mixing device A liquid metering and mixing device specifically for the metering and mixing of gasoline and oil for a two-cycle engine wherein addition of gasoline to a rotatably mounted measuring member for a gasoline tank actuates a valve means which opens for a short... | 01/29/1980 |
| 4147298 | Fluid flow controller A fluid flow controller is disclosed particularly adapted for maintaining a variable value constant volume fluid flow through a conduit supplying fluid to a zone. A spring biased vane is disposed across the diameter of the conduit to provide a motion sign... | 04/03/1979 |
