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| Number | Title | Issue Date |
| 7219689 | Automatically flushing water regulator for animal watering systems A water pressure regulator for a watering system of an animal house is provided with a water inlet member comprising a watering path and a flush path. The watering path is operably engaged by the regulating valve. The inlet member is manually movable relative to the... | 05/22/2007 |
| 7163025 | Vacuum regulating valve A vacuum regulating valve which is simplified in structure and where the flow rate characteristic in evacuating a vacuum vessel is improved, comprises (i) a main valve 1A of a large size which has: a principal body 4 having two main ports 11, 12... | 01/16/2007 |
| 7089958 | Damper vane A damper unit for an air circulation system. The damper unit includes a frame defining an air flow opening, a damper vane for opening and closing the air flow opening, and a drive mechanism for turning the damper vane between the open and closed positions. The vane ... | 08/15/2006 |
| 7048003 | Polyvalve A flow control and pressure reducing valve having a polygonic valve body with an inlet chamber and an outlet chamber partitioned by a partition plate. A plurality of passages are formed through receptacles around the partition plate, with the inlet portion opening i... | 05/23/2006 |
| 7004186 | Surge relief apparatus for a valve A valve apparatus that includes surge relief includes a valve housing having an inlet port, an outlet port, and a poppet seat between the inlet port and the outlet port. The valve also includes a first moveable poppet piece having a closed position against the poppe... | 02/28/2006 |
| 6962165 | Automatically-actuated safety device with a double-seated valve to regulate the flow rate of a fluid A safety device for insertion into a pipeline (K) in which fluid circulates in an upstream (X−) and a downstream (X+) direction, comprises a tube (1) that provides the fluid with a central circulatory passage (CC) regulated by a central valve (3) tha... | 11/08/2005 |
| 6920890 | Airflow controller The invention provides an airflow controller for a propulsion inlet system including a bleed section having two or more bleed plenum chambers, each of the chambers having a porous inlet surface and an exit surface and two or more plates slidably mounted to the bleed... | 07/26/2005 |
| 6868861 | Level control system for sheet casting process A level control system for controlling the thickness of a work material in a slurry form cast upon a moving belt includes a fluid reservoir disposed above the belt, a sensor lens assembly for sensing the slurry height within such reservoir, and a control valve for a... | 03/22/2005 |
| 6817378 | Fluid flow control damper assembly A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, tha... | 11/16/2004 |
| 6702013 | Multiport gate valve assembly for flow completion system A flow completion system comprises a tubing spool which is connected above a wellhead housing, a tubing hanger which is supported in the tubing spool and which includes an axial production bore and at least two conduits that each extend from the bottom of... | 03/09/2004 |
| 6672334 | Multi-diaphragm valve A multi-diaphragm flow control valve includes a valve body separable into two parts. Each part includes an interior chamber having a closed end which separates the chambers when the parts are joined and an open end for connection to a pipe. An outer chamb... | 01/06/2004 |
| 6668848 | Pneumatic volume booster for valve positioner The system controls of a pneumatically operated valve using an electrical control signal from a controller. A pilot circuit of the system has multiple piezo valves that are subject to electrical signals from the controller to provide pneumatic output sign... | 12/30/2003 |
| 6591869 | Multiport gate valve assembly The invention is directed to a gate valve assembly which comprises an elongated body having a longitudinal bore extending therethrough; a plurality of gates slidably disposed in the longitudinal bore across respective flow passages which each extend later... | 07/15/2003 |
| 6557819 | Roll seal control valve A water system uses a pressure reservoir of an extremely small size. A valve device is placed between a water pump and the pressure reservoir. The valve device has a constant outlet pressure to limit the flow from the pump at high pressures. The pump is t... | 05/06/2003 |
| 6534003 | Valve and a method of using a valve A valve is provided which includes a valve body, a first valve member, and a second valve member. The valve body has a first flow passage formed therethrough and a second flow passage formed therein. The second flow passage has a smaller cross-sectional a... | 03/18/2003 |
| 6520205 | Compressor unloader system A system and method for controlling air flow into a rotary screw compressor is provided. The system includes an unloader valve for controlling airflow into the compressor. An anti-rumble system may be included in the unloader valve housing. The unloader v... | 02/18/2003 |
| 6514049 | Compressor control valve with two independently operated check valves, wherein the crank chamber pressure is the control pressure, and the monitor pressure is the suction pressure A control valve is used in connection with a variable displacement compressor that varies the discharge capacity by controlling an inclination of a cam plate located in a crank chamber. The inclination of the cam plate is variable based on crank chamber p... | 02/04/2003 |
| 6453944 | Multiport gate valve assembly The invention is directed to a gate valve assembly which comprises an elongated body having a longitudinal bore extending therethrough; a plurality of gates slidably disposed in the longitudinal bore across respective flow passages which each extend later... | 09/24/2002 |
| 6276658 | Roll seal control valve A water system uses a pressure reservoir of an extremely small size. A valve device is placed between a water pump and the pressure reservoir. The valve device has a constant outlet pressure to limit the flow from the pump at high pressures. The pump is t... | 08/21/2001 |
| 5597011 | Flow regulator A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes flu... | 01/28/1997 |
| 5488967 | Method and apparatus for feeding gas into a chamber A vacuum deposition chamber alternately receives a reactive gas and an inert gas during a process in which a thin film is formed on a wafer in the chamber. The inert gas flows through a first pressure regulator, a first feed line and a first changeover va... | 02/06/1996 |
| 5301714 | Multi-position valve apparatus having a return port A multi-position valve for dispensing fluid and providing continuous fluid flow through the valve assembly. The multi-position valve assembly including an inlet port, an outlet port, and a return port leading to a fluid chamber. The multi-position valve a... | 04/12/1994 |
| 5172722 | Stop valve for a vacuum apparatus A stop valve for a vacuum apparatus comprises a valve casing having an inlet port and an outlet port, a main valve element housed in the valve casing for selectively opening and closing a flow passageway for causing the inlet port to comunicate with the o... | 12/22/1992 |
| 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 |
| 5090393 | Pressure regulating valve for installation in a vent duct of an internal combustion engine A pressure regulating valve, especially for regulating the vacuum in the crankcase of an internal combustion engine, which includes a pan-shaped housing having a bottom part, a housing cover, and a diaphragm 14 arranged between the housing and housing cov... | 02/25/1992 |
| 4967793 | Compact multi-stage pressure reducing valve A flow control and pressure reducing valve has a valve body with an inlet chamber and outlet chamber separated by a partition plate. A plurality of passages are formed in the valve body spaced circumferentially around the partition plate and have an inlet... | 11/06/1990 |
| 4936032 | Safety valve for hydraulic receiver and hydraulic circuit comprising same Safety valve for a hydraulic circuit supplying a hydraulic receiver having an inlet and an outlet connected to the receiver which includes between the inlet and the outlet a non-return module which has a non-return valve and a selectively operable valve h... | 06/26/1990 |
| 4836245 | Control valve A control valve including a change-over poppet formed into a substantially cylindrical shape, a guide pipe inserted into the change-over poppet, and a load check poppet slidably fitted on the guide pipe. The change-over poppet is formed with a communicati... | 06/06/1989 |
| 4830050 | Fluid control valve A fluid control valve so constructed that when a spool arranged in a valve housing is at its neutral position, a neutral passage communicates with a tank passage, whereas when the spool is changed over, communication therebetween is blocked, to thereby su... | 05/16/1989 |
| 4816083 | Multifunctional electromagnetic valve assembly A multi-function electromagnetic valve assembly is provided which combines a number of housing combinations of electromagnetic valves into a single housing or connects the valves such that the valve inlets and/or exits are separate and/or merged to form a... | 03/28/1989 |
| 4681297 | Adjustable pressure regulating solenoid valve A pressure regulating solenoid valve is disclosed which comprises a valve body having a flow path therethrough having an inlet and an outlet. The valve body has a main valve seat within the flow path, and a main valve member mounted within the valve body ... | 07/21/1987 |
| 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 |
| 4622999 | Gas flow control system with pilot gas booster A control arrangement for a gas-fired system. Three diaphragm-operated valves are in series providing a stage operation. The valves are pilot controlled. A booster pump is provided for cooperation with the pilot valves to boost the line pressure to the fi... | 11/18/1986 |
| 4519574 | Auxiliary controlled valve disposed in a drilling string An auxiliary controlled valve including a valve body (8) displaceable against a valve seat (9) disposed in a drilling string (6) to produce pressure pulses in drilling fluid renders possible a selective closing or opening of a low-resistance transmission ... | 05/28/1985 |
| 4503887 | Pilot-operated dual flow rate valve A valve including a pilot valve body having an inlet port, an outlet port, and an orifice between the ports surrounded by a valve seat. A valve member is movable into and out of engagement with the valve seat to close and open the valve, respectively. The... | 03/12/1985 |
| 4304259 | Plant circuit having change-over means for changing sequence of flow The change-over means employs two three-way valves and two non-return valves for affecting a switch over in the sequence of flow through the four flow elements. Each three-way valve is constructed with a closure member which may only close one of the inle... | 12/08/1981 |
| 4262695 | Flow rate control valve A flow rate control valve for use with an actuator, in which a fluid may be quickly discharged from a cylinder in the actuator on a return stroke of a piston which is slidingly fitted in the cylinder. The valve includes a casing defining a fluid inlet por... | 04/21/1981 |
| 4199006 | Pneumatic valve A pneumatic valve for controlling the inflation of floatation bladders in ver-deployed underwater recovery apparatus comprises, in one embodiment, an inlet connectable to a source of pressurized air, two small semi-circular flow passages joining the inlet... | 04/22/1980 |
| 4192346 | Control valve A control valve is provided between a direction-changeover valve and an actuator in a fluid-pressure operating system. This control valve includes a body having an inlet and an outlet; a fluid passage interconnecting the inlet and the outlet; a valve body... | 03/11/1980 |
| 4148518 | Sprung seat for all vehicles This sprung seat notably for off-the-road vehicles is mounted on a base frame and provided with elastic return means in the form of a hydropneumatic device associated with an automatic monitoring distributor adapted to be connected to the pressure fluid c... | 04/10/1979 |
