| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 137489000 | Choked or throttled pressure type | 22 |
| 20080257423 | Secondary Seat for Gas Regulator - A fluid regulating device includes a valve disc and a valve port adapted to provide a secondary seal during an obstructed closing operation, whereby the valve disc directly engages a housing component of the valve port to maximize the integrity of the secondary seal and advantageously reduce the size and complexity of existing valve ports. The valve port comprises a housing and a cartridge slidably disposed in the housing. The valve disc directly engages a primary seat carried by the cartridge during a normal closing operation. During an obstructed closing operation, however, the cartridge is pushed into the housing such that the valve disc directly engages a secondary seat carried by the housing at a location that is downstream of the cartridge. | 10-23-2008 |
| 20090025801 | Hydraulic system for producing a pilot pressure to actuate a transmission component - A hydraulic system for producing a pilot pressure to actuate at least one transmission component of an automatic transmission of a vehicle. A pilot system is connected via an inlet orifice or flow restriction to a supply conduit that is under a predetermined input pressure and that includes a pressure limiting valve for setting a predetermined pilot pressure. At least one inlet orifice or flow restriction is provided in such a way that the resulting flow resistance compensates for a rise in residual pilot pressure at low temperatures. | 01-29-2009 |
| 20090301579 | VACUUM PRESSURE SYSTEMS WITH VACUUM CHAMBER FULL-RANGE, CLOSED-LOOP PRESSURE CONTROL - A flow control apparatus for a pressure system includes a chamber, a pump for providing a flow from the chamber and a valve positioned between the chamber and the pump for providing regulation of the flow. The valve is continuously operable between a fully open and a fully closed position. A motor continuously operates the valve between the open and closed positions. The motor includes a position encoder including an encoder output. A sensor continuously monitors the flow and includes a sensor output. A system interface receives the encoder output and the sensor output. The system interface processes the position encoder output to determine position and velocity of the motor and using at least the sensor output, position and velocity produces control signals for the motor. A servo driver receives the control signals from the system interface and continuously controls the motor in a closed-loop manner to regulate the flow. | 12-10-2009 |
| 20100071787 | SYSTEM, INCLUDING A VARIABLE ORIFICE ASSEMBLY, FOR HYDRAULICALLY MANAGING PRESSURE IN A FLUID DISTRIBUTION SYSTEM BETWEEN PRESSURE SET POINTS - A system for hydraulically managing fluid pressure in a fluid distribution system between pressure set points includes a main valve having a fluid inlet and outlet. The main valve is configured to open to increase fluid flow therethrough and to close to reduce the fluid flow therethrough. A variable orifice assembly is coupled to the main valve and has fluid apertures formed in a housing thereof to create a fluid flow pathway therebetween. A valve stem is variably positioned within the housing to alter the fluid flow between the fluid apertures. A first control pilot is in fluid communication with the main valve and a first fluid aperture of the variable orifice assembly. A second control pilot is in fluid communication with the main valve and a second fluid aperture of the variable orifice assembly. The valve position and fluid flow are variable as the main valve opens and closes. | 03-25-2010 |
| 20120006427 | Hydraulic Valve Device - The invention relates to a hydraulic valve device having a fluid connection arrangement ( | 01-12-2012 |
| 20120111425 | INTERNAL RELIEF VALVE APPARATUS FOR USE WITH FLUID REGULATORS - Example internal relief valves for use with fluid regulators are described. An example internal relief valve includes a relief valve seat coupled to a first end of the relief valve stem and to engage a first side of a sensing apparatus to prevent fluid flow between the first side of the sensing apparatus and a second side of the sensing apparatus when the internal relief valve is in a closed position. A bleed hole within a surface of the sensing apparatus and separate from the opening of the sensing apparatus is dimensioned to provide a controlled flow rate between the first side and the second side of the sensing apparatus when the internal relief valve is in an open position. A seal is disposed along a body of the relief valve stem upstream from the bleed hole and the valve seat to prevent fluid flow between the first side of the sensing apparatus and the second side of the sensing apparatus via the opening of the sensing apparatus when the relief valve is in the open position. | 05-10-2012 |
| 20130019965 | FLOW CONTROL VALVE AND METHOD OF USE - A multistage, pilot-operated pressure regulator for pressure adjustment and/or back pressure relief and/or differential pressure or flow control applications comprises a diaphragm and a plurality of plates, including a throttle plate and at least one flow control plate. In at least one embodiment, the throttle plate includes a sloped upper surface for contacting the diaphragm, and a plurality of apertures residing within a plurality of concentric rows. In addition, in at least one embodiment, at least one flow control plate is positioned downstream of the throttle plate, the at least one flow control plate including a plurality of apertures residing within a plurality of concentric rows. A method of controlling the flow of fluid in a conduit is also provided. | 01-24-2013 |
| 20130291964 | PROPORTIONAL NORMALLY CLOSED PILOT PRESSURE CONTROL VALVE - A proportional pressure control valve includes a cage housing and has an inlet, a relief outlet, and a control outlet. A relief poppet provides a proportional relief to the valve. A sleeve is received in a central bore of the cage housing. The sleeve has a fluid inlet fluidly connected to the inlet of the cage housing and has a fluid outlet fluidly connected to the relief outlet and the control outlet of the cage housing. A control piston is received in a central bore of the sleeve and is axially moveable between first and second positions therein. The control piston is configured to restrict flow through the outlet of the sleeve when the control piston is in the second position, and wherein the control piston is biased towards the first position. | 11-07-2013 |
| 20160053906 | Remotely-Actuated Dual-Pressure Relief Valve - A relief valve assembly includes an actuating assembly, a relief valve, and a check valve. The actuating assembly includes a housing forming a cylinder, and a pilot piston within the cylinder. The relief valve includes a housing forming opposed first and second blind bores, a relief valve piston within the first bore and carrying a relief valve member, and a first spring acting between the pilot piston and the relief valve piston to bias the relief valve member toward a valve seat to close the valve seat. A pilot pressure is selectively applied to move the pilot piston toward the first spring to selectively increase the relief pressure of the relief valve from a first relief pressure to a second relief pressure. The check valve includes a check valve member within the second blind bore, a second spring biasing the check valve member away the second blind bore. | 02-25-2016 |
| 20160069471 | VALVE ARRANGEMENT - A valve arrangement comprising a valve housing, a pilot chamber, a main valve member and a control valve member. The main valve member is axially movably arranged in the valve housing and is arranged to restrict a main fluid flow. The control valve member is movable in an axial direction relative the main valve member in response to an actuating force acting on the control valve member. The control valve member is arranged to interact with the main valve member to define axially separated pilot and bypass fluid restrictions. The pilot restriction restricts a pilot fluid flow out from the pilot chamber. The bypass restriction restricts a bypass flow bypassing the main fluid flow. The bypass flow is separate from the pilot fluid flow. The pilot and bypass restrictions are adjustable in response to the actuating force, thereby allowing simultaneous adjustment of the pilot pressure and the bypass fluid flow. | 03-10-2016 |
| 20160131277 | PRESSURE CONTROL VALVE AND CONTROL VALVE - A pressure control valve capable of preventing or suppressing the occurrence of the flaw that a pilot valve element which receives hydraulic pressure from a hydraulic fluid vibrates and hits a pilot valve seat member producing strange noise when the pilot valve element is in an opening state without resulting in an increase in number of components and assembling man-hours, the pressure control valve is provided with a main valve part containing a main valve element and a valve housing that includes a main valve seat on which the main valve element is able to be seated and a pilot chamber in which the main valve element is put in a slidable manner, and a pilot valve part containing a pilot valve element and a pilot valve seat member that includes a pilot valve seat on which the pilot valve element is able to be seated, the pilot valve element moving apart from the pilot valve seat to open when pressure in the pilot chamber exceeds a predetermined pressure. | 05-12-2016 |
| 137490000 | Pilot valve within main valve head | 3 |
| 20090000674 | Pressure control valve having an asymmetric valving structure - The present invention describes, generally, a method and system for controlling the dynamics of an actuatable load functioning or operable within a servo or servo-type system, wherein the dynamics of the load are controlled by way of a unique asymmetric pressure control valve configured to provide intrinsic pressure regulation. The asymmetric pressure control valve, which may be referred to as a dynamic pressure regulator because of its capabilities, utilizes different sized free floating spools that are physically independent of one another and freely supported in interior cavities of respective corresponding different sized valving components that make up the valve body to regulate the pressures acting within the overall system between the control or pilot pressure and the load or load pressure. The dual spools of the pressure control valve, although physically independent of one another, function in cooperation with one another in an attempt to maintain a state of equilibrium in the system, namely to keep pressure acting on or within the actuator (the load pressure), or the feedback pressure corresponding to the load pressure, the same as the control or pilot pressure. Moreover, pressure regulation and control is intrinsic to the asymmetric pressure control valve because of the configuration and function of the dual spools and the feedback system acting on the spools, thus eliminating the need for electronically or mechanically user controlled systems. | 01-01-2009 |
| 20120138170 | SHUT-OFF TRIM INCLUDING SPRING LOADED CHECK VALVE - In accordance with the present invention, there is provided a bi-directional shut-off trim for a valve which possesses the functional attributes of a pilot operated trim and a balanced trim through the integration of a spring loaded check valve into a pilot trim. In forward flow isolation, the bi-directional shut-off trim of the present invention acts as a normal pilot operated trim. In reverse flow, the check valve of the shut-off trim opens to balance the pressure on either side of the plug thereof. | 06-07-2012 |
| 20140311594 | CENTRAL VALVE FOR PIVOT MOTOR ACTUATOR - The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled. | 10-23-2014 |
| 137491000 | Choked passage through main valve head | 2 |
| 20080314458 | Method and Device for Regulating a Pressure and/or a Volume Flow of a Fluid - A device for regulating a pressure and/or a volume flow of a fluid, including a cavitation chamber having a ram device, to generate a ram pressure region, and having at least one outlet orifice for a discharge of the fluid from the cavitation chamber, at least one cavitation region being able to be generated in the cavitation chamber, and the outlet orifice being situated so that the fluid flows between the cavitation region and the ram pressure region to the outlet orifice. Also described is a method for regulating a pressure and/or a volume flow. | 12-25-2008 |
| 20100006159 | PRESSURE RELIEF VALVES - Pressure relief valves are described herein. An example pressure relief valve includes a body having external threads to threadably engage another body having a pressurized chamber. Additionally, the pressure relief valve includes a relief valve orifice that is threadably engaged with the body via internal threads of the body. The relief valve orifice includes a seating surface. Further, the pressure relief valve includes a pressure-balanced piston assembly that is slidably movable within the body relative to the relief valve orifice and the seating surface to control the flow of fluid between the pressurized chamber and the relief valve orifice. | 01-14-2010 |
| 137489500 | Pilot controls supply to pressure chamber | 6 |
| 20130032225 | PRESSURE CONTROL VALVE - A pressure control valve is provided. The pressure control valve includes a sleeve having an inlet port receiving hydraulic fluid and a low-pressure path communicating with a hydraulic tank, a main poppet opening and closing the low-pressure path with respect to the inlet port, a main poppet spring elastically biasing the main poppet in an initial state by pressing the main poppet, a pilot poppet having an orifice flow path to control pressure in the pressure chamber while maintaining a sliding state against a valve seat when pressure that exceeds a predetermined pressure is generated in the pressure chamber to open an internal flow path of the valve seat, and a pilot poppet spring elastically biasing the pilot poppet in an initial state by pressing the pilot poppet to maintain the internal flow path of the valve seat closed. | 02-07-2013 |
| 20140053922 | Piston-Type Flushometer Valve - A main valve seat surface for engaging the piston, an outer sidewall, and an inner sidewall defining a flow passage with a first opening and an second opening, the flow passage having a reduced diameter portion. | 02-27-2014 |
| 20140090725 | PILOT OPERATED RELIEF VALVE WITH DUAL PILOT REGULATORS - A pilot operated pressure relief valve includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve plug may be disposed within the fluid passageway, the valve plug cooperating with a valve seat to control fluid flow through the fluid passageway. An actuator may be connected to the valve plug, the regulator biasing the valve plug towards the valve seat. A pilot assembly may include a first pilot valve and a second pilot valve, wherein the pilot assembly directs fluid pressure upstream of the valve plug to one of the first and second pilot valves. When the upstream fluid pressure exceeds a predetermined level, the valve plug moves away from the valve seat allowing fluid to flow through the fluid passageway. | 04-03-2014 |
| 20140150903 | PILOT TYPE PRESSURE REGULATOR - A pilot type pressure regulator has: a primary port to which air is supplied from the outside; and a secondary port discharging air regulated by a main valve body provided to a main valve shaft. A main valve diaphragm abutting on an abutting end surface of the main valve shaft partitions an inner space into a secondary pressure chamber communicating with the secondary port and a pilot pressure chamber to which pilot pressure is supplied. This pressure regulator has an exhaust mechanism exhausting air from the secondary pressure chamber to the outside when pressure of the secondary port exceeds a set value. In the exhaust mechanism, a stopper holding a sealing material in a guide hole is inserted from the side close to a main valve hole, that is, an inner end portion. | 06-05-2014 |
| 20140174563 | INTERNAL PILOT TYPE PRESSURE REGULATOR - An internal pilot type pressure regulator | 06-26-2014 |
| 20140174564 | Valve Module - Valve module for influencing a fluid supply of a fluid-operated load, comprising a valve housing with a valve chamber being connected to an inlet port and an outlet port and a pilot chamber being connected to an operating port, comprising a valve member which is movably adjustable between a blocking position and a release position and further comprising an actuator which is motion-coupled to the valve member, wherein a position of the actuator and the valve member can be set as a function of a pressure applied to the pilot chamber, and further comprising a sensor device for detecting a position of the valve member and/or the actuator along a movement axis, and the sensor device comprises an electric coil arrangement which forms a ring around at least one fluid port from the group comprising the operating port, the inlet port and the outlet port. | 06-26-2014 |
