Entries |
Document | Title | Date |
20080230127 | ACTUATOR POSITION CONTROL DEVICE USING A FAIL FREEZE SERVO-VALVE - The actuator ( | 09-25-2008 |
20090044871 | LOW PRESSURE RISE RATE PILOT OPERATED POPPET RELIEF VALVE - A relief valve for a hydraulic machine that combines a poppet valve assembly and a pilot valve assembly together using a connector pin wherein internal fluid passageways within the poppet and pilot spools provide a fluid flow path between the inlet of the valve and a cavity disposed between the poppet and pilot. As a result of the internal passageways fluid is metered to the interior cavity to provide additional control and stability within the relief valve. | 02-19-2009 |
20090205723 | HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE - A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section. | 08-20-2009 |
20090320934 | Intake-Gas Throttle Device - An intake-gas throttle device in the intake pressure region of an air-conditioning compressor, in particular for air-conditioning systems of motor vehicles, the device controlling the delivery rate of the air-conditioning compressor. | 12-31-2009 |
20100059125 | Balanced pilot operated check valve - A valve assembly includes a check valve element in an output chamber. The check valve element opens to permit forward flow of fluid under pressure in the output chamber from an input port to an output port. The check valve element closes to block back flow of fluid under pressure in the output chamber from the output port toward the input port. The back flow of fluid under pressure exerts a closing force upon the check valve element from within the output chamber. A counter force generating element, or pilot element, communicates with the valve element, to selectively open the valve, even in the presence of back flow pressure. The counter force generating element may apply a counter force to the check valve element, which urges the valve element toward the opened condition. The counter force may be less than the closing force, so the check valve element remains closed. | 03-11-2010 |
20100071786 | Pressure Loaded Service Regulator with Pressure Balanced Trim - A gas regulator includes an actuator, a regulator valve, and pressure loading device. The pressure loading device provides a pressure load to a surface of a diaphragm of the actuator to act against a downstream pressure being applied to the opposite surface of the diaphragm and being controlled by the regulator. As the downstream pressure varies and the diaphragm displaces to move a control element to regulate the downstream pressure, the pressure loading device maintains a specified load pressure. The regulator may further include a balanced trim applying a balancing force to offset a force of an upstream pressure on the control element. | 03-25-2010 |
20100126599 | PILOT OPERATED CHECK VALVE - A pilot-operated check valve ( | 05-27-2010 |
20100229966 | FUEL SYSTEMS AND METHODS FOR CONTROLLING FUEL SYSTEMS IN A VEHICLE WITH MULTIPLE FUEL TANKS - Fuel systems and methods for controlling fuel systems in a vehicle with multiple fuel tanks are provided. An exemplary vehicle fuel system includes a first fuel tank including a first pressure sensor, and a second fuel tank. The system may further include a fuel tank isolation valve positioned to selectively decouple the first fuel tank and the second fuel tank. The system may further include an electronic controller configured to identify which of the first fuel tank and second fuel tank includes a fuel system leak by selectively decoupling the first fuel tank and the second fuel tank via the fuel tank isolation valve, responsive to an identification of the fuel system leak. | 09-16-2010 |
20100300552 | HYDRAULIC VALVE DEVICE - The invention relates to a hydraulic valve device comprising a fluid connection arrangement ( | 12-02-2010 |
20100326541 | STAND FOR PRESSURE RELIEF VALVE - A frame for supporting a pressure relief valve located within a frac line connected to high pressure pumps on frac trucks. A metallic base is formed from rectangular tubing in the shape of a box. Saddles on the base support a tee on the lower portion of the relief valve. Brace links are connected at one end to the corners of the metallic base and swivel about clevises to allow access to the pressure relief valve. The other end of the brace links connect to clevises on a flange when assembled. The flange is rigidly connected to an upper portion of the relief valve to stabilize the assembly. Lifting loops on the flange allow the frame to be lifted during assembly. | 12-30-2010 |
20110108137 | PRESSURE REGULATOR HAVING AN INTERGRAL PILOT AND SELF-RELIEVING MECHANISM - A high flow pressure regulator valve is disclosed having an integral pilot valve. The disclosed valve includes a pressure regulating portion including inlet and outlet ports, a valve seat, valve disc and a spring for biasing the valve disc into engagement with the valve seat. The valve also includes a pilot valve portion positioned on the flow regulating portion. The pilot valve portion includes a pilot spring, a diaphragm and a pusher post. One end of the pusher post is positioned toward the diaphragm and a second end is disposed within an annulus region. The valve further includes a pressure path that enables selective fluid communication between the outlet port, the annulus, an inner chamber region disposed beneath the diaphragm, and an intermediate chamber disposed above the valve disc. Other embodiments are disclosed and claimed | 05-12-2011 |
20110126920 | HYDRAULIC VALVE DEVICE - The invention relates to a hydraulic valve device having a valve housing ( | 06-02-2011 |
20110132472 | DEVICE FOR CONTROLLING A PILOT PRESSURE SIGNAL | 06-09-2011 |
20110192471 | VARIABLE FLOW RATE VALVE SYSTEM - A variable flow rate valve system adjusts flow rate using the flow medium itself by creating differential pressures that determine a position of a valve member in relation to an associated valve seat. The valve system includes a diaphragm that divides a valve chamber into a control chamber and a flow chamber connected with an inlet. A valve body is connected with the diaphragm and cooperates with a valve seat to modulate flow from the inlet to an outlet and through the flow chamber. A first pilot valve in a first bypass extends between the outlet and the control chamber, and a second pilot valve in a second bypass extends between the inlet and the control chamber. The valves are controlled to selectively open or close respective bypasses to vary the flow through the flow chamber between a fully open and a fully closed condition in response to a control signal. | 08-11-2011 |
20110214756 | Servo Valve - The invention relates to a servo valve for a hydraulic vehicle steering system, having a valve sleeve and an input shaft which is arranged within the valve sleeve and can be rotated relative to the valve sleeve about a common axis, the valve sleeve and the input shaft each having axially oriented control grooves positioned at least partially opposite each other, each control groove of the valve sleeve and of the input shaft being connected with two adjacent control grooves of the input shaft and of the valve sleeve, respectively, via a respective control gap, a first control gap being formed between a pressure port and a working port of the servo valve associated with the pressure port, and a second control gap being formed between a return port associated with the pressure port and the working port of the servo valve, the second control gap having a smaller flow cross-section than the first control gap in a center position of the valve. | 09-08-2011 |
20110232779 | Excess flow safety shut-off valve - The present invention relates to an excess flow safety shut-off valve including: a cylindrical body having an outlet and a mounting part formed at one side thereof and a plurality of guides formed in the mounting part in such a manner as to be protruded inwardly from the outlet; an inlet cap disposed at the opposite side to the outlet in such a manner as to be assembled with the cylindrical body; and a ball member adapted to be supportedly mounted in the mounting part by means of the plurality of guides in such a manner as to be attached to the protruding part of the inlet cap by means of a magnetic force generated from the magnet and adapted to be detached from the protruding part to block the outlet if excess water flow occurs. | 09-29-2011 |
20110297251 | COMBINED HYDRAULIC CONTROL VALVE - A combined hydraulic control valve is disclosed, the valve includes a modularized pilot control valve assembly ( | 12-08-2011 |
20120012199 | SYSTEM AND METHOD FOR HYDRAULICALLY MANAGING FLUID PRESSURE DOWNSTREAM FROM A MAIN VALVE BETWEEN SET POINTS - A system for hydraulically managing fluid pressure between selected set points includes a pilot control system operably coupled to a main valve. The pilot control system includes at least one fluid conduit, a variable orifice assembly, and a control pilot valve apparatus. Fluid is passed through a fixed orifice and into a first chamber of the control pilot valve apparatus. Fluid is passed through the variable orifice of the variable orifice assembly and into a second chamber of the control pilot valve apparatus. The main valve is hydraulically opened or closed in response to a pressure differential between the first and second chambers of the control pilot valve apparatus so as to manage fluid pressure downstream of the main valve between the selected upper and lower set points. | 01-19-2012 |
20120018010 | Hydraulic Transmission - A hydraulic transmission has a primary unit and a secondary unit, which are connected to each other in a closed circuit by way of a first and a second working line. The primary unit and/or the secondary unit has a plurality of cylinder/piston units, which can each be activated or deactivated by means of a first valve and a second valve. This serves the purpose of setting a time-averaged volume flow of the unit. In this arrangement, both valves of each cylinder/piston unit are designed as high-pressure valves. A reversal in the direction of rotation, e.g. a reversal in the direction of travel, and a change from drive to overrun, during regenerative braking for example, is accomplished within the closed circuit of the transmission without a reversal in the direction of delivery by means of a changeover between low pressure and high pressure. | 01-26-2012 |
20120055566 | PUMP FLOW RESTRICTING DEVICE - A restrictor mechanism is provided in a pilot operated solenoid valve that restricts the pilot flow to the actuating piston of the valve if the pressure differences within the valve are great. This reduces the actuating forces allowing the valve to open or close softly. As the pressures within the valve start to balance, the restrictor device opens, allowing full pilot flow to hold the valve in position. | 03-08-2012 |
20120085436 | HYDRAULIC VALVE FOR USE IN A CONTROL MODULE OF AN AUTOMATIC TRANSMISSION - A hydraulic valve assembly ( | 04-12-2012 |
20120160344 | VACUUM CONTROL VALVE AND VACUUM CONTROL SYSTEM - The invention provides a vacuum control valve configured to control the vacuum pressure in the vacuum chamber. The vacuum control valve includes a control valve main body, an operation unit, a cylinder, a biasing unit, and a bellofram. The operation unit and the cylinder include a valve opening manipulation chamber and a shutoff load generation chamber. The shutoff load generation chamber is configured to have a common axial center line with the valve opening manipulation chamber and to generate a load applied to the operation unit in a direction for reducing the lift in accordance with a supply of the working fluid. And the shutoff load generation chamber may be formed in an interior of the rod. | 06-28-2012 |
20130037130 | REGULATORS HAVING AN ISOLATED LOADING CHAMBER AND BLOWOUT PREVENTION APPARATUS - Fluid regulators are described. An example regulator includes a regulator body defining a sensing chamber between an inlet and an outlet of a fluid flow passageway of the fluid regulator. A bonnet is coupled to the regulator body and defines a loading chamber disposed adjacent the sensing chamber. The loading chamber is substantially sealed relative to the sensing chamber and an environment surrounding the fluid regulator. A sensor guide is disposed between the sensing chamber and the loading chamber and has at least one seal to fluidly isolate the loading chamber from the sensing chamber. The sensor guide has a vent flow path between the sensing chamber and the loading chamber to vent the sensing chamber during a failure condition of the at least one seal. | 02-14-2013 |
20130061953 | EMERGENCY SHUT-OFF - A control system includes a first valve configured to block a fluid flow between a first section of a flow line and a second section of the flow line in response to a first emergency shut-off signal of a first signal type. A second valve is configured to block the second section of the flow line and a third section of the flow line in response to a second emergency shut-off signal of a second signal type, wherein the first signal type differs from the second signal type. | 03-14-2013 |
20130112289 | PLUG ASSEMBLY FOR HIGH-PRESSURE VALVE - A plug assembly is provided for a high-pressure valve of the type with a tubular body extending along a longitudinal axis and in which, under the action of a piloted actuator, a needle moves longitudinally between a closed position and an open position. The plug assembly includes a plug having a flat part able to be fixed onto the body transversally to the longitudinal axis, and a spring intended to apply to the needle a force biasing it axially towards the closed position. The spring is fixed to the plug forming with it an integrated assembly. | 05-09-2013 |
20130153056 | COMPOSITE VALVE - A composite valve has a communication path, a second valve port and a pilot passage. First and second valve bodies are arranged to be moved up and down in the same direction, and are away from each other only at a predetermined distance. In the case that a lift amount of the second valve body for a small flow rate control is equal to or less than a predetermined amount, said pilot passage and a first valve port are respectively closed by a pilot valve body and the first valve body, thereby taking a small flow rate control state. In the case that the lift amount of said second valve body goes beyond said predetermined amount, said pilot valve body is moved up by the upward movement of a valve shaft to open said pilot passage, thereby taking a large flow rate control state. | 06-20-2013 |
20130153057 | Compact Two-Way Cartridge Valve Using Combine Flange-Controlled Plate - A compact two-way cartridge valve with combined flanged cover includes combined flanged covers, miniaturized pilot control assemblies and main stage of seated poppet valve, or combined flanged covers and main stage of seated poppet valve, or combined covers and miniaturized pilot assemblies and main stage of seated poppet valve. The present invention can overall realign all the two-way cartridge valve products currently on the market, and innovate new series of MINISO compact two-way cartridge valves in the specifications of 10 mm, 16 mm, 25 mm, 32 mm, and will change the quo-status of hydraulic drive and control system, that is the two-way cartridge valves currently are mainly used for large power or flow situations, and can make two-way cartridge valves applied for medium and small power or flow situations, which are the majority of the market in the hydraulic drive and control system. | 06-20-2013 |
20130213496 | PRESSURE CONTROL SYSTEM FOR RELIEF AND SHUTDOWN OF FLOW - This disclosure is related to a non-electronic pressure control system for a pressurized system that receives fluid from a fluid supply. The pressure control system includes a control module, an actuator and a flow control device. The control module monitors the pressure of fluid either upstream or downstream of the flow control device. The control module can send a pneumatic signal to the actuator to open or close the flow control device responsive to the pressure monitored by the control module and the pressure required for the pressurized system. | 08-22-2013 |
20130276914 | PIEZOELECTRIC VALVE AND PUMP ACTUATOR - The proposed valves and/or fluid pumps are controlled with a piezoelectric actuator, which provides very low power consumption, low cost, very compact designs, high speed response, long life, hysteresis free and linear operation, long displacement over 50 mm and high torque over 400 Newton. A steady continuous flow of a media is achieved by supplying a power profile to the actuator via an electronic circuitry connected to electrodes attached to the piezoelectric actuator. | 10-24-2013 |
20140158226 | ANTI-FLOODING SAFETY DEVICE FOR HOUSEHOLD APPLIANCES, IN PARTICULAR WASHING MACHINES - An anti-flooding safety device for a user apparatus includes:
| 06-12-2014 |
20140202560 | MULTIFLEX COUPLING - A compact, easily manufactured, axisymmetric mechanism can be configured to change the magnitude of a short-movement linear motion, or also reverse the movement direction, of an actuator for control of movable elements. The mechanism is bidirectional and reversible, functioning symmetrically, and does not contain any gears nor lead screw threads. It is constantly loaded, so that force change is achieved without mechanical backlash, introducing hysteresis. The movement conversion is generally proportional and suitable for use in actuating a fluid control valve intended for modulating the control of fluids. | 07-24-2014 |
20150059874 | Dual Cartridge Temperature Control Valve - A dual cartridge temperature control valve having a self-contained, top loading bonnet cartridge and a self-contained, bottom loading seat cartridge. The control valve body may include internally configured pressure channels configured to mate with the upstream and downstream pressure channels of a control valve actuator having internally integrated pressure channels. | 03-05-2015 |
20150090352 | FLUID-DRIVEN SHUTOFF VALVE - An air-driven shutoff valve includes a valve seat formed in a main body, a valve element movable into or out of contact with the valve seat, a drive part integrally connected to the valve element, and a pilot opening/closing valve configured to supply compressed fluid to drive the drive part. The pilot opening/closing valve includes (a) a first needle valve, a first motor to change an opening degree of the first needle valve, and a first check valve allowing the compressed fluid to flow only from a pilot opening/closing valve side to a drive part side, and (b) a second needle valve, a second motor to change an opening degree of the second needle valve, and a second check valve allowing the compressed fluid to flow only from the drive part side to the pilot opening/closing valve side. | 04-02-2015 |
20150136249 | VALVE FOR VENTILATION OF A TANK - A tank ventilation valve has a housing ( | 05-21-2015 |
20150329126 | RAIL VEHICLE WITH PRESSURE SURGE-SAFE GRAYWATER LINE - A rail vehicle includes a graywater line which is in communication with the surroundings of the rail vehicle directly or by way of a collecting container. The graywater line is equipped with a pressure protection valve, which protects a graywater line section upstream of the pressure protection valve from pressure surges occurring in the surroundings of the rail vehicle. The pressure protection valve is constructed as a pinch valve which is controlled by a control device in order to protect the graywater line section from pressure surges. | 11-19-2015 |
20160153474 | METERING CHECK VALVE | 06-02-2016 |
20160153475 | Discrete Pilot Stage Valve Arrangement With Fail Freeze Mode | 06-02-2016 |