Class / Patent application number | Description | Number of patent applications / Date published |
251300010 | Electrically actuated pilot valve | 56 |
20090065718 | Water hammerless valve - [Problems] To limit an opening of the fluid channel by automatically preventing the stem from upward movement caused by water hammer using a pneumatically-operating valve. | 03-12-2009 |
20090184271 | FLUID FLOW CONTROL VALVE - A fluid-flow control valve comprising: an inlet (E) for connecting to a feed duct; an outlet (S) for connecting to an evacuation duct; a valve member ( | 07-23-2009 |
20090212243 | PNEUMATICALLY-OPERATED VALVE FOR NITROUS OXIDE INJECTION SYSTEM - A nitrous oxide or fuel control valve ( | 08-27-2009 |
20100038565 | PROPELLANT GAS CONTROL VALVE - A gas control valve is configured to controllably supply propellant gas to a thruster so that the thruster may produce thrust over a relatively wide range, and so that the thruster exhibits relatively fine minimum impulse bit (MIB) performance. The gas control valve includes a pilot stage having a pilot valve, and a main stage having a main valve. The gas control valve responds to control signals supplied to the pilot stage and is configured such that for commands of relatively short duration, only the pilot valve responds. Conversely, for commands of relatively longer duration, the pilot valve and main valve both respond. | 02-18-2010 |
20100044601 | WATER BOX TOILET SENSING FLUSHING SYSTEM - A water-box toilet sensing flushing system including an inlet loop, loop washer, linking pipe, solenoid valve outer bracket, switch diaphragm, solenoid valve, connector, water bowl assembly, outlet washer wire, and sensor. This is an added device to the original manual structure of the water box. It does not affect the original function; but a sensing control water box automatic flushing device is added. | 02-25-2010 |
20100148098 | DIRECTLY PILOTED VALVE ASSEMBLY - A directly piloted valve assembly has a valve body including a bore, at least one inlet port, at least one outlet port and at least one exhaust port wherein the ports are all in fluid communication with the bore. A spool is received in the bore. The spool includes a wall defining a lumen. An actuator is received in the lumen. The actuator includes a shuttle seal channel. A shuttle seal is received in the shuttle seal channel. A solenoid is connected to the valve body. The wall of the spool includes at least one pilot hole in fluid communication with the lumen defined by the spool and the bore of the valve body. | 06-17-2010 |
20100181508 | SAFETY VALVE DRIVE SYSTEM - A safety valve drive system is operated such that a safety valve of a nuclear power plant is opened by supplying a driving gas by using a pilot valve at an occurrence of an accident or a transient state to thereby protect a reactor against pressure application. The safety valve drive system is provided with a safety valve drive unit, as a function of actuating the safety valve, and cables. The safety valve drive unit actuates in a manner that the safety valve is opened in response to respective auto-depressurization system actuating signals for two or more segments among respective auto-depressurization system actuating signals for four segments, and is closed if an auto-depressurization system actuating signal for one or less segment among the auto-depressurization system actuating signals for the four segments is received. The cables are connected to the safety valve drive unit and used to transfer the auto-depressurization system actuating signals for the four segments. | 07-22-2010 |
20100224804 | FAIL SAFE PNEUMATICALLY ACTUATED VALVE WITH FAST TIME RESPONSE AND ADJUSTABLE CONDUCTANCE - Apparatus and method for fail-safe high-speed-pneumatic valve is disclosed. Fail-safe dependability is provided by a spring-loaded normally-closed pneumatic actuator. When the spring-loaded actuator is pressurized, the normally closed mechanism is actuated to the valve active position. Concurrently, the pressure is directly applied to deflect a diaphragm or a bellow-assembly back to sealing position. Ultra high purity embodiments with standard dome shaped diaphragms are disclosed. Additional high conductance diaphragms and bellows embodiments are employed for higher conductance valves. Novel flow path layouts are disclosed. The valves are applicable for fast gas and fluid switching and are particularly suitable for high productivity Atomic Layer Deposition (ALD) applications. Additional embodiments cover improved diaphragm and seal reliability, externally adjustable valve conductance, improved valve safety and high temperature valve seals. | 09-09-2010 |
20100276615 | PROPORTIONAL PILOT ACTING VALVE - A valve assembly comprising a pilot valve; a solenoid; and a main valve, the main valve having an actuator in communication with a pressure control; the pilot valve may facilitate opening the main valve in proportion to an energized level of the solenoid. The solenoid may move the first disc to isolate the inlet port from the pressure control and/or move the second disc to communicate the outlet port with the pressure control. The actuator may move the second disc to isolate the outlet port from the pressure control and/or move the first disc to communicate the inlet port with the pressure control. The pilot valve may isolate both the inlet port and the outlet port from the pressure control when the pilot valve experiences forces in equilibrium from the solenoid and the actuator. | 11-04-2010 |
20100294962 | PILOTED VALVE, PARTICULARLY PROPORTIONAL THROTTLE VALVE - The invention relates to a piloted valve, particularly a piloted proportional throttle valve, having a valve piston ( | 11-25-2010 |
20110073788 | MICROVALVE FOR CONTROL OF COMPRESSED FLUIDS - A micro-electromechanical device for controlling compressed fluid flow is provided. A chamber includes a fluid flow inlet port, a high pressure region exceeding 30 bar, and a fluid flow outlet port. A moveable micro-electromechanical valve is positioned to contact the fluid flow outlet port when the moveable micro-electromechanical valve is in a first position. An electrical connection to the moveable micro-electromechanical valve provides an electrical pulse train to the moveable micro-electromechanical valve to actuate the valve at a rate of 10 KHz or more to move the valve in order to control fluid communication between the high pressure region and a low pressure region downstream from the fluid flow outlet port. | 03-31-2011 |
20110240891 | POSITIONER - A positioner operating mode identifying function and an use parameter selecting function are provided in a calculating unit. A positive operating parameter and a negative operating parameter are stored in a storing portion. The positioner operating mode identifying function identifies the operating mode of a positioner or from the direction of change of a control output and the direction of change of an amplified pneumatic pressure signal Pout, and the identification result is set automatically as the current operating mode of the positioner. In accordance with the current operating mode identified for the positioner, the use parameter selecting function selects, as the use parameter from the storing portion, the positive operating parameter if the positive operating mode, and the negative operating parameter if the negative operating mode, and sets the selected use parameter automatically. | 10-06-2011 |
20110248196 | ELECTRO-HYDRAULIC ACTUATOR INCLUDING A RELEASE VALVE ASSEMBLY - A manual release valve is provided for a electro-hydraulic actuator of the type including a piston movable in a cylinder and defining a piston side chamber and a rod side chamber, the valve threadedly attached to the housing of the actuator and extending at least partially within the fluid housing conduits, the valve moveable from a closed position fully seated in the housing to an open position for fluidly connecting both the piston side chamber and the rod side chamber to the reservoir, the valve further including a pressure relief portion that is operable when the valve is in the closed position for relieving pressure from at least one of the piston side chamber or the rod side chamber. | 10-13-2011 |
20110266473 | Gas Valve and Method of Control - A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve. | 11-03-2011 |
20120211681 | PNEUMATIC ACTUATOR AIR FLOW CONTROL SYSTEM - A pneumatic actuator air flow control system includes a pneumatic rotary actuator (PRA) and a solenoid air flow control valve (SAFCV). The PRA contains an air reservoir and two pistons on which a number of actuated racks are formed and engaged therewith, so the piston can drive the actuated rack and a pinion when the piston moves to achieve the goal of opening or closing the valve body. The SAFCV includes a flow control valve body (FCVB), a pilot solenoid valve (PSV) and a switch system, wherein the FCVB and the PRA can be connected to direct the pressurized air into the air reservoir, and the PSV is used to control the pressurized air in and out of the PRA to change the rotation direction of the pinion. Additionally, the switch system allows users to switch between a double-acting and fail-safe operation. When there is no pressurized air and/or electrical power and if an emergent need to open or close the valve, a manual override in the PSV can be used without further installation of a declutchable manual gear operator or external piping when there is no pressurized air and/or electrical power. | 08-23-2012 |
20120261598 | DIRECTLY PILOTED VALVE ASSEMBLY - A directly piloted valve assembly has a valve body including a bore, at least one inlet port, at least one outlet port and at least one exhaust port or second outlet port wherein the ports are all in fluid communication with the bore. A spool is received in the bore. The spool includes a wall defining a lumen. An actuator is received in the lumen. The actuator includes a shuttle seal channel. A shuttle seal is received in the shuttle seal channel. A solenoid is connected to the valve body. The wall of the spool includes at least one pilot hole in fluid communication with the lumen defined by the spool and the bore of the valve body. | 10-18-2012 |
20120292541 | HYDRAULIC HOUSING OF AN ELECTROHYDRAULIC VALVE CONTROLLER - A hydraulic housing of an electrohydraulic valve controller of an internal combustion engine which has a hydraulic housing body and guide cylinder for a pump piston that is joined to the hydraulic housing body. The guide cylinder is joined to the hydraulic housing body by a friction welded connection. | 11-22-2012 |
20120298893 | PRESSURE CONTROL VALVE WITH APERTURE - The invention refers to an electro-magnetic pressure control valve with a magnetic part and a valve part. The magnetic part has at least on coil that can be electrically triggered, a coil core and an armature guided traversingly. The valve part has a feed for the pressurized medium, a return and a consumer connection. The valve part has at least two seat valves that can be closed each by a valve element. | 11-29-2012 |
20130009080 | FLUID-OPERATED ACTUATING DRIVE ON A VALVE - A fluid-operated actuating drive on a valve comprising a base unit ( | 01-10-2013 |
20130175462 | SOLENOID ON-OFF VALVE - A solenoid on-off valve includes a main valve body in a housing. A pilot passage is formed on the main valve body, and a pilot valve body is inserted into the pilot passage so as to open and close the pilot passage. The pilot valve body and the main valve body move in accordance with a plunger which is movable in an opening direction. The plunger and the pilot valve body are coupled by a coupling pin. The coupling pin is displaceable relative to the pilot valve body. When the main valve body is pushed in the opening direction and before the coupling pin contacts the pilot valve body, the plunger stops the movement of the main valve body. Thus, a shear force is prevented from acting on the coupling pin when the valve port is opened. | 07-11-2013 |
20130207009 | TWO PART VALVE | 08-15-2013 |
20130256570 | VALVE AND HYDRAULIC CONTROLLER - A valve and a hydraulic controller are provider. The valve may combine a rotary-to-linear converter with the hydraulic controller to provide for at least two mechanisms for actuating the valve. Additionally, the valve may include a mechanical lock mechanism suitable for securing the valve at a desired flow position. The mechanical lock mechanism may also provide overload protection. That is, the mechanical lock mechanism may “slip” or disengage if torque forces reach undesired levels. The hydraulic controller may enable a “stepping” mode of control and “fast actuation” mode of control. The “stepping” mode may deliver a discrete quantity of a fluid, while the “fast actuation” mode may deliver a continuous quantity of the fluid. | 10-03-2013 |
20130284954 | HIGH TEMPERATURE SERVO VALVE ACTUATOR - A high temperature servo valve to control a valve actuator for a valve body in a valve passage includes a plurality of high temperature wires to deliver a voltage; an actuator block of piezo ceramic material connected to the plurality of high temperature wires to move when it receives the voltage; a pressure supply line connecting the servo valve to the valve passage to supply air to the servo valve; a pressure vent line to vent pressure from the servo valve; and a pressure servo line connecting to the valve actuator to control the pressure in the valve actuator. | 10-31-2013 |
20130292588 | SOLENOID VALVE - A solenoid valve has a main stage and a pilot stage, wherein the main stage includes a switching element which in the closed condition of the solenoid valve closes a main flow path from a high-pressure side to a low-pressure side and in the open condition of the solenoid valve clears the main flow path. In its closed condition, the pilot stage closes a pilot flow path from the high-pressure side to the low-pressure side and in its open condition clears the pilot flow path. The pilot flow path leads through a control chamber which is in permanent flow connection with the high-pressure side via a control opening. The pressure existing in the control chamber acts on the switching element. The pilot stage includes a coil and a pilot valve element movable by a magnetic field of the coil, which are arranged at the switching element and are moved with the same. | 11-07-2013 |
20130341540 | Adjustable Damping Valve Arrangement - An adjustable damping valve arrangement comprises an actuator for controlling a main stage valve, wherein the main stage valve has a rigid main stage valve body which carries out an axial operating movement relative to a valve seat surface of the main stage valve, wherein a pre-opening valve having at least one spring element which in turn preloads a pre-opening valve body precedes the main stage valve body, wherein the main stage valve body is supported on the valve seat surface in the closed operating position by the pre-opening valve. | 12-26-2013 |
20140042346 | SERVOVALVE ACTUATION - A servovalve pilot stage ( | 02-13-2014 |
20140239207 | VALVE DEVICE - A valve device of the present invention includes: a main valve body interposed between a first pressure chamber of a main passage and a second pressure chamber; and a pilot valve body provided in the second pressure chamber. A first pilot passage including a first restrictor extends from an outside of a housing or a primary passage to the second pressure chamber, and a second pilot passage including a second restrictor is formed at the main valve body. The pilot valve body is maintained at a first operation position by a pilot valve body biasing member and is caused to move to a second operation position by a valve body driving unit. When the pilot valve body is located at the second operation position, the main valve body is caused to move to an open position by a pressure difference between the first pressure chamber and the second pressure chamber. | 08-28-2014 |
20140246613 | ADAPTER FOR AN ASSEMBLY HAVING A VALVE AND A POSITIONER - An adapter for an assembly having a valve and a positioner, which are configured for pipeless valve mounting according to the guideline VDI/VDE 3847, wherein the adapter is intended to be installed between the valve and the positioner, and the adapter enables a variably adjustable position of the valve relative to the positioner, such that possible collisions between the valve and other parts located near the interface intended for the installation of the valve can be largely avoided. | 09-04-2014 |
20140264102 | REGULATING VALVE OPENING CONTROLLING SYSTEM - A regulating valve opening controlling system includes a regulating valve having a valve and an actuator that receives a pneumatic pressure and drives the valve, and a positioner, provided with the regulating valve, which controls the opening of the valve. The system further includes a regulating valve characteristic information storage portion that stores characteristic information of the regulating valve, provided readably in the regulating valve, a regulating valve characteristic information reading portion that reads the characteristic information of the regulating valve, which is stored in the regulating valve characteristic information storage portion, and an information converting/setting portion that converts into specific information, and sets in the positioner, characteristic information of the regulating valve, which has been read in by the regulating valve characteristic information reading portion. | 09-18-2014 |
20140361202 | FAULT TOLERANT AIRFLOW CONTROL SYSTEM - An airflow control system for controlling pressure and flow through a flow passage with an upstream portion and a downstream portion includes a valve actuator which receives electrical signals to control the opening and closing of the valve that is configured and arranged such that the system may operate in the event of loss of power. | 12-11-2014 |
20140361203 | PNEUMATICALLY ACTUATED LIQUID DISPENSING VALVE - A liquid dispensing valve includes a liquid inlet for receiving the liquid and a liquid outlet for discharging the liquid. A valve member is mounted for movement relative to the liquid outlet between open and closed positions. A liquid passage communicates between the liquid inlet and the liquid outlet. An air inlet is provided for receiving air from a source of pressurized air. An air passageway is coupled with the air inlet. A pneumatic actuator communicates with the air passageway for moving the valve member at least to the open position. An electrically operated air supply device interacts with the air passageway so as to control the flow of pressurized air to the pneumatic actuator. | 12-11-2014 |
20150115182 | POSITIONER - A positioner includes: an explosion proof container containing, in an interior space, an electric circuit module and an electropneumatic converter converting, into pneumatic signals, electric signals processed by the electric circuit module; and a pneumatic amplifier, provided outside of the explosion proof container, amplifying the pneumatic signal converted by the electropneumatic converter. The explosion proof container is formed with air flow paths for the air fed into the pneumatic amplifier and the air fed out of the pneumatic amplifier, in a thick portion between inner and outer wall faces of the container that encompasses the surrounding of the interior space. The air flow paths are formed along an inner wall face of the explosion proof container. The inner wall face of the explosion proof container where on the air flow path is formed is arc-shaped or a shape that uses many curved faces of free curve shapes. | 04-30-2015 |
20160025237 | DAMPING VALVE - A damping valve includes a valve seat member, a valve body, a back-pressure chamber, a pilot passage, and a pilot valve, wherein the pilot valve has a pilot valve seat member and a pilot valve body, the pilot valve seat member having an cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port, and an annular pilot valve seat provided in an end of the valve container, and the pilot valve body having a large diameter portion, a small diameter portion slidably inserted into the valve container, and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole, and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage. | 01-28-2016 |
20160049230 | MAGNETIC ARMATURE - A magnetic armature for a torque motor is provided, comprising a pivot portion and at least one arm portion extending from said pivot portion, wherein the smallest cross-sectional area of said armature at said pivot portion is at least 60% of the smallest cross-sectional area of said armature at said at least one arm portion. | 02-18-2016 |
20160123498 | MICRO-ELECTRIC MECHANICAL SYSTEM CONTROL VALVE AND METHOD FOR CONTROLLING A SENSITIVE FLUID - A valve assembly is configured to regulate the flow of an isolated fluid therethrough and includes a first valve stage configured to control the flow of a first fluid through a first fluid circuit, and a second valve stage configured to control the flow of a second fluid through a second fluid circuit. The first valve stage is connected to the second valve stage such that the first fluid acts on the second valve stage to move the second valve stage between open and closed positions. The second fluid flowing through the second valve stage is also isolated from the first fluid flowing through the first valve stage. | 05-05-2016 |
20160146228 | SERVOVALVE JET PIPE - A jet pipe for a hydraulic servovalve is provided, comprising a body comprising a fluid inlet, a fluid outlet and a conduit in fluid communication with the fluid inlet and the fluid outlet, wherein said body is a single piece of material. | 05-26-2016 |
20160153579 | DEVICE AND SYSTEM FOR WIRELESSLY CONTROLLING AND MONITORING OF QUARTER TURN VALVES | 06-02-2016 |
20160160886 | IMPROVEMENTS IN HYDRAULIC SERVOVALVES - A servovalve pilot stage assembly is provided having a first fluid conduit ( | 06-09-2016 |
20160161013 | IMPROVEMENTS IN HYDRAULIC SERVOVALVES - A servovalve has a pilot stage having a piezoelectric element actuating a pilot stage spool valve, which pilot stage spool valve comprises an output control fluid line to a main stage. | 06-09-2016 |
20160169406 | A VALVE ASSEMBLY FOR HAZARDOUS ENVIRONMENTS | 06-16-2016 |
20160169407 | SWITCHING VALVE FOR THE REGULATION OF A MASS FLOW | 06-16-2016 |
20160172927 | SOLENOID ACTUATOR | 06-16-2016 |
20160179106 | PRESSURE REGULATOR FOR FLUID HAMMER REDUCTION | 06-23-2016 |
20160377191 | FLUSH-MOUNT NPT PLUG - An electro-pneumatic controller includes a base portion having at least one lateral surface and a plurality of passageways disposed through the base portion. A bore extends through the lateral surface, and the bore has a counterbore portion and a threaded engagement portion. A standard NPT plug may be coupled to the base portion, and the plug has a head portion and an engagement portion that threadedly engages the engagement portion of the bore. A top surface of the head portion of the plug is coplanar with the lateral surface of the base portion or is disposed within the counterbore portion of the bore. | 12-29-2016 |
20160377192 | NON-INERT GAS CERTIFIED ELECTRONIC CONTROLLER - An electro-pneumatic controller adapted to use a non-inert fluid as a control fluid includes a base portion and a cap portion removeably secured to the base portion. A non-intrinsically-safe process may be disposed within an interior of the cap portion. A plurality of passageways may be disposed through the base portion. The electro-pneumatic controller may also include a flameproof barrier assembly which may include a plurality of flameproof joints each disposed within desired portion of the plurality of passageways. The plurality of flameproof joints cooperate to at least partially define a first zone, the flameproof joints adapted to prevent or to limit the spread of an open fire or explosion that might occur due to the ignition of the non-inert control fluid. | 12-29-2016 |
251300020 | Main valve biased closed by fluid pressure | 11 |
20090032746 | Piezo-electric actuated valve - A piezo-electric actuated valve having an inlet chamber, an outlet chamber, and an end chamber is disclosed. The valve also includes a main poppet disposed within the valve body. The main poppet is configured to be selectively movable between a flow blocking position substantially blocking a flow of pressurized fluid and a plurality of flow passing positions allowing fluid communication between the inlet and the outlet chambers. The valve also includes a pilot valve configured to be selectively movable between a first position substantially blocking a flow of pressurized fluid and a plurality of second positions allowing fluid communication between the end chamber and the one of the inlet and outlet chamber exposed to a pressurized fluid having a lower pressure. The valve further includes a piezo-electric actuator configured to be selectively movable between a de-energized position and an energized position to affect the pilot valve to selectively move to at least one the plurality of second positions. Movement of the pilot valve to one of the plurality of second positions affects the main poppet to selectively move to at least one of the plurality of flow passing positions. | 02-05-2009 |
20100084587 | FLUID-WORKING MACHINE - In a fluid-working machine having a high-pressure line and a working chamber, a valve arrangement is arranged to control fluid flow from the high-pressure line to the working chamber. The valve arrangement comprises a main valve having a valve element arranged to provide sealing contact with a valve seat, and an auxiliary valve comprising an electromagnetically-movable valve member for equalising pressure on either side of the main valve by placing the working chamber in direct fluid communication with the high-pressure line. The electromagnetically-movable valve member may comprise a spool valve member or a poppet valve member. | 04-08-2010 |
20100117012 | DUAL POSITION PILOT OPERATED VALVE ASSEMBLY - A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports, the valve body having a cylindrical adapter secured to an open end thereof and housing a secondary piston, reciprocable therein, with an axial stem depending from the second piston bottom surface and extending through the adaptor to the first piston cavity for intermittent contact therewith; and an end cap secured to and closing the adapter and having an inlet port interconnected with a source of high pressure control gas and respective first and second conduits leading to the main and secondary piston bore cavities, with an adjustment mechanism controlling the degree of opening/closing of the valve assembly. Several methods of operation are also set forth. | 05-13-2010 |
20100155633 | POPPET VALVE OPERATED BY AN ELECTROHYDRAULIC POPPET PILOT VALVE - A control valve includes a main poppet that moves in response to pressure in a primary control chamber and thereby controls the flow of fluid through a valve seat between first and second ports. A passageway extends between the second port and the primary control chamber and includes a variable flow restriction that decreases as the main poppet moves away from the valve seat. An electrohydraulic pilot valve has a pilot poppet which controls fluid flow from the primary control chamber to the first port in response to pressure in a pilot control chamber. A sub-pilot valve selectively releases pressure in the pilot control chamber to operate the pilot poppet to open and close a path between the inlet and the outlet. Using an electrohydraulic pilot valve enables the main poppet to operate quickly in controlling large fluid flow rates. Unidirectional and bidirectional versions of the control valve are described. | 06-24-2010 |
20150083945 | VALVE ACTUATOR SYSTEM - A sanitary valve system having a sanitary valve in a valve housing with at least one inlet and at least one outlet, the sanitary valve having at least one surface formed of a hygienic material that prevents growth of bacteria or fungus and is configured to control a flow from the inlet to the outlet by means of a valve regulating element. | 03-26-2015 |
20160003320 | SOLENOID VALVE - A solenoid valve includes a main valve having a valve seat and a main valve body configured to open or close a main flow passage, a pilot passage that branches from the main flow passage, an orifice provided in the pilot passage, a back-pressure chamber configured to bias the main valve body to a closing direction by virtue of an internal pressure, a pilot valve configured to control an internal pressure of the back-pressure chamber, and a solenoid configured to control a valve opening pressure of the pilot valve. There is a time difference between a valve opening timing of the main valve and a valve opening timing of the pilot valve such that the valve opening timing of the main valve is delayed from the valve opening timing of the pilot valve. | 01-07-2016 |
251300030 | Venting passage within movable main valve | 4 |
20090212244 | PILOT OPERATED VALVE WITH FAST CLOSING POPPET - A pilot-operated valve has a main poppet controlling fluid flow between inlet and outlet ports in response to pressure in a control chamber. Fluid flow through a pilot passage, linking the control chamber and the outlet port, moves an exhaust spool between first and second positions to control fluid flow through passages in the main poppet. The first position blocks flow between the control chamber and the outlet port and provides a path between the control chamber and the inlet port. In the second position, flow between the control chamber and the outlet port is enabled, and a second path, that is more restricted than the first path, is provided between the control chamber and the inlet port. When the valve closes, flow through the first path allows movement of the main poppet at a faster rate than during opening when flow occurs through the more restricted second path. | 08-27-2009 |
20100032595 | EXHAUST VENTING FOR A FLUID CONTROL DEVICE - A fluid control device is disclosed that is configured to vent pilot volume through an exhaust port or exhaust passageway ( | 02-11-2010 |
20110121213 | ELECTRONIC FLUSH VALVE WITH OPTIONAL MANUAL OVERRIDE - A flush valve assembly including a discharge receiver with a plug opening therein, a sleeve, a main valve assembly positioned within the sleeve, and a main diaphragm sealingly connected between the main valve assembly and the sleeve. The main diaphragm and the main valve assembly define a control chamber on an upper side thereof and an inlet region on a lower side thereof. The assembly also includes a discharge plug with a flange portion configured to be received in the plug opening in the discharge receiver. When the flush valve assembly is in a non-pressurized condition, the flange portion of the discharge plug is not seated within the plug opening of the discharge receiver, and when the flush valve assembly is in a pressurized condition, the flange portion of the discharge plug is seated within the plug opening of the discharge receiver. The flushing operation may be electronic and/or manual. | 05-26-2011 |
20140231681 | ELECTROMAGNETICALLY-ACTUATED PILOTED VALVE - An electromagnetically-actuated piloted valve includes a housing provided with a plurality of cavities through which a pressurized operating fluid can enter or exit the valve, a driving device including an electromagnet, and a plugging device that is longitudinally movable along two opposite parallel directions and driven by the driving device. The valve includes an abutting element provided with at least one through hole arranged for being selectively engaged or disengaged from the plugging device so as to alternatively enable or prevent the operating fluid from traversing the hole and thus alternatively enabling or preventing the passage of the operating fluid through the valve. | 08-21-2014 |
251300050 | Fluid pressure sole means for biasing valve closed | 1 |
20140217315 | VALVE SYSTEM - A valve system has a main body including a valve element that controls flow of fluid between a plurality of ports and an operation unit capable of being detachably attached to the main body. The main body includes; a driving element that is operated from the outside by a magnetic force and directly or indirectly drives the valve element; and a first housing that houses the valve element and the driving element and is watertight in a state where pipes are connected to the plurality of ports. The operation unit includes: an operation element that generates a magnetic field that operates the driving element; and a second housing that houses the operation element, when attached to the first housing, the operation element and the driving element being in a facing state via part of a wall of the first housing and part of a wall of the second housing. | 08-07-2014 |