Class / Patent application number | Description | Number of patent applications / Date published |
137512000 | Plural | 80 |
20080251141 | BACKFLOW PREVENTION FOR HIGH PRESSURE GRADIENT SYSTEMS - Gradient performance with high pressure gradient solvent delivery system is optimized by approximation of infinite stroke volume of high pressure pumps by the addition of pulse dampening with backflow prevention to each high pressure pump. The backflow prevention adds sufficient minimum flow resistance, thereby enhancing the performance of the pulse dampening over a wider range of flow rates resulting in consistent gradient performance. | 10-16-2008 |
20090038693 | COMBINATION RELIEF VALVE AND INJECTION FITTING - A valve for regulating the flow of fluid through an access port in a fluid chamber includes a body having a first end and a second end, the second end being located in the access port and the first end protruding outside of the access port. An axial bore extends from the first end to the second end, an injection fitting is formed at the first end of the body in fluid communication with the axial bore, and the second end of the body includes a selective sealing interface. The body forms a sealing interface with a threaded inner wall surface of the access port. A one-way valve assembly is positioned within the axial bore, and is arranged to permit a flow of fluid therethrough in a downstream direction and prevent the flow of fluid therethrough in an upstream direction. A bypass passageway extends from the selective sealing interface separate from the axial bore. A connecting passageway connects the bypass passageway with the axial bore upstream of the one-way valve assembly. | 02-12-2009 |
20090050216 | VALVE SYSTEMS FOR USE WITH A FLUID INJECTOR SYSTEM - A valve system for use in a system including a first source of a first pressurized fluid and a second source of a second pressurized fluid includes a valve housing including a first inlet port adapted to be placed in fluid connection with the first source, a second inlet port adapted to be placed in fluid connection with the second source and an outlet port. The valve system further includes a backflow prevention system to prevent flow of the first pressurized fluid through the second inlet and to prevent flow of the second pressurized fluid through the first inlet port. The valve system is adapted to provide a fluid path between at least the first inlet port and the outlet port to enable fluid to be drawn from the outlet port to the first inlet port. Several of the valve systems of the present invention provide for flow from the first inlet port to the outlet port and concurrent flow from the second inlet port to the outlet port. | 02-26-2009 |
20090114292 | Valve assembly - Although modern diesel fuel formulations are intended to reduce emissions of diesel engines, at least some of those modern fuels tend to have relatively low lubricity levels. The control valve assemblies described herein help to minimize any increased wear that would otherwise result from the use of such low lubricity fuels by providing a valve element, a valve guide, and an insert. The valve element is received within the valve guide and is moveable between an open position and a closed position. The insert forms a first sealed interface and a second sealed interface with the valve element and the valve guide. When the valve element is in the closed position, both of the first sealed interface and the second sealed interface are engaged. When the valve element is in the open position, only one of the first sealed interface and the second sealed interface is engaged. | 05-07-2009 |
20090139585 | INTEGRATED AIR TANK - An integrated air tank ( | 06-04-2009 |
20090235993 | FLOW RATE CONTROL DEVICE - A flow rate control device comprises a regulator that adjusts the pressure of a fluid to be supplied, a plurality of narrowed pathways arranged in parallel on the downstream side of the regulator, and an open/close section that switches a predetermined narrowed pathway amongst the plurality of narrowed pathways between an open position and a closed position. One of the pathways can be an open narrowed pathway arranged on the downstream side of the regulator and another can be an opened/closed narrowed pathway arranged downstream of the regulator in parallel with the open narrowed pathway. In this case, the open/close section that switches the opened/closed narrowed pathway between as open position and a closed position. | 09-24-2009 |
20090242046 | Valve module - A system for pressurizing and exhausting a vented chamber is disclosed. The present disclosure includes a unitary module having two integrated valves for each supported chamber, a single inlet port for each chamber, a single vent exhaust port and a single pressurized port. In addition, a number of pressure gauge ports are provided to allow the pressure at various points to be monitored. In addition, the unitary module optionally includes a leak check port. Using this port, the operator can test the integrity of all valves within the module. | 10-01-2009 |
20090288719 | TANK PRESSURE AND VACUUM RELIEF DEVICE - Particular embodiments of the present invention include devices and methods for relieving excess pressure or vacuum pressure from a tank interior. An embodiment of a pressure relief device includes a housing having an opening associated with a first end, an opening associated with a second end, and an over-pressure opening. The device further including a pressure relief valve for selectively relieving pressure from a tank, the valve including an over-pressure opening seal biased by a first pressure bias means against a pressure valve seat associated with the over-pressure opening. The device also including a guide block translatable in an axial direction of a second bore of the housing and being biased toward the pressure valve seat by a second pressure bias means. The guide block is translatable independent of the over-pressure opening seal. The device also includes a vacuum relief valve for selectively relieving vacuum pressure in the tank. | 11-26-2009 |
20100000617 | CONSTRUCTION EQUIPMENT MACHINE WITH HYDRAULIC PRESSURE CONTROLLED SELECTING SYSTEM - A construction equipment machine has a lower frame and an upper frame rotatably connected, the machine having at least one hydraulic pilot circuit comprising a primary hydraulic pilot line running from the upper frame to the lower frame through a rotary joint for controlling the operation of at least one hydraulic device located on the lower frame, including: a pressure regulating system capable of setting in the pilot circuit a pilot pressure having a value; a hydraulic pressure controlled selecting system which is located on the lower frame and is fed by the primary hydraulic pilot line, at least two independent secondary pilot lines located downstream of the pressure controlled selecting system, and wherein said hydraulic pressure controlled selecting system is capable of selectively and independently supply or not supply pressurized fluid to the independent secondary pilot lines, responsive to the value of the pilot pressure. | 01-07-2010 |
20100032027 | Backflow preventer - A first check valve has a narrow flow path portion ( | 02-11-2010 |
20100139786 | Multi-Protection Valve - An object of the present invention is to allow a vehicle to run in the case where an air compressor connected to an input port fails so as to cause air leakage from the location of the failure, by preventing air in a parking brake circuit from leaking from the failure location through a bleed air flow path. In order to achieve the object, a multi-protection valve includes: a communication passage for communicating between an input chamber and a service output port so as to bypass a pressure control valve provided in correspondence with the service output port, the communication passage having a check valve for preventing air from flowing from the service output port into the input chamber and a throttle for restricting the air flow rate; and a bleed air flow path for communicating between the input chamber and the parking output port so as to bypass pressure control valves, the bleed air flow path having a second check valve for preventing air from flowing from the input chamber to the parking output port. The multi-protection valve further includes a third check valve provided between the input chamber and an input port to prevent air from flowing from the input chamber to the input port. | 06-10-2010 |
20100147401 | Sprinkler With Pressure Regulation - A sprinkler pressure regulator module has a compact arrangement with a shiftable member having an upper cavity for receiving water flow debris, and a portion of a bypass valve may reciprocate therein. The module includes a stator plate directing water into a drive mechanism, such as a turbine drive mechanism. The shiftable member receives fluid flow from a radially outboard direction and is sealed with a cup portion receiving the shiftable member to define a cup cavity. A module exterior surface is separated from a sprinkler housing to define a vent cavity. A pressure release vent communicates with the cup cavity, a vent channel between the cup portion and the exterior surface, the vent cavity, and the exterior environment. The vent cavity and cup portion provide receptacles for debris deposit. Ribs around an opening of the vent channel with the vent cavity generally prevent debris from entering the vent channel. | 06-17-2010 |
20100163120 | METHODS, APPARATUS AND/OR SYSTEMS RELATING TO CONTROLLING FLOW THROUGH CONCENTRIC PASSAGES - An annular dual-flow check valve for controlling the flow through concentric channels that have a common outlet, comprising: an outer body and an inner body that define the concentric channels, which include an outer channel and an inner channel formed therein; a spring activated annular poppet that resides in the outer channel and has a range of motion in the axial direction; and an opening through the inner body that connects the outer channel to the inner channel; wherein: the axial movement of the annular poppet is regulated by the pressure of the flow upstream of the annular poppet in the outer channel; and the axial range of motion of the annular poppet includes at least two axial positions: a closed position where the annular poppet substantially covers the opening and a open position where at least a portion of the opening is not covered by the annular poppet. | 07-01-2010 |
20100163121 | VALVE CONTROL UNIT OF TANK LORRY - Disclosed therein is a valve control apparatus for a tank lorry. The valve control apparatus for the tank lorry includes a first control valve for opening and closing the oil feed valve by supplying compressed air to the oil feed valve or discharging the supplied compressed air to the outside, a second control valve for actuating the first control valve by the user's manual manipulation, an automatic closing valve for actuating the first control valve, a third control valve for selecting an operation of the automatic closing valve, and a pneumatic circuit for realizing functions of the control valves, wherein the control valves are general direction conversion valves for converting a flow of the compressed air and can be controlled on the road. So, a user can carry out a loading work in more convenient and safe when the user loads oil articles or chemicals on a storage tank mounted on the tank lorry. | 07-01-2010 |
20100243082 | Liquid isotope delivery system - A liquid isotope delivery system includes a pressure-controlling unit, an input unit, a target chamber, a proton-radiating unit and a storage unit. The pressure-controlling unit includes a first regulating valve, a second regulating valve connected to the first regulating valve and a third regulating valve connected to the first regulating valve. The input unit is connected to the second regulating valve. The target chamber is connected to the third regulating valve and the input unit. The proton-radiating unit is located near the target chamber. The storage unit is connected to the target chamber. | 09-30-2010 |
20110126922 | DEVICE FOR PRODUCING AND PROVIDING A VACUUM, AND VENTILATION VALVE - The invention relates to a device for producing and providing a vacuum for a vacuum consumer, having a vacuum source, having a suction valve, having a non-return valve arranged between the vacuum consumer and the suction valve, and having a ventilation valve, the control inlet of which ventilation valve is connected to the suction port of the vacuum source, the output of which ventilation valve opens out between the control valve and the non-return valve, and the input of which ventilation valve is open to the environment. | 06-02-2011 |
20110126923 | Valve Assembly - A valve assembly for a liquid storage tank, the storage tank having a wall, the assembly comprising: a pressure relief conduit; a gas inlet valve device having a gas inlet aperture through which gas may pass into the tank; and a gas outlet valve device having a gas outlet aperture through which gas may pass out from the tank, the inlet valve device and outlet valve device being arranged to control a flow of gas into and out from the storage tank, respectively, whereby a pressure of gas in the tank may be maintained between an upper pressure value being a value in excess of a reference pressure value by a prescribed amount and a lower pressure value being a value below the reference pressure value by a prescribed amount, the gas inlet and outlet apertures being provided in gaseous communication with the pressure relief conduit, the pressure relief of conduit being arranged such that gas flowing into or out from the storage tank by means of an operation of the value assembly is caused to pass through the conduit, the tank further having a liquid inlet, the liquid inlet being switchable between a sealed condition in which liquid may not be fed into the tank through the liquid inlet and an open condition in which liquid may be fed into the tank through the liquid inlet, wherein the inlet valve device comprises a valve member arranged whereby movement of the inlet valve device between closed and open conditions, respectively, the assembly being arranged to be coupled to the tank so as to assume a first orientation in normal use with the tank in the sealed condition, in the first orientation movement of the valve member of the inlet valve device between the open and closed conditions being arranged to involve movement of the valve member in a substantially non-vertical plane. | 06-02-2011 |
20110226357 | FLUSH VALVE ANTI-BACKFLOW CARTRIDGE - A flush valve has a valve body having an inlet and an outlet, a piston disposed in the valve body between the inlet and the outlet, a cartridge disposed in the outlet and a plurality of check valves disposed serially within the cartridge for preventing backflow through the outlet and wherein vacuum effects are minimized. | 09-22-2011 |
20120006428 | VALVE ASSEMBLY - A valve assembly comprising mutually opposed first and second valves ( | 01-12-2012 |
20120018013 | APPARATUS AND METHODS TO DISPENSE FLUID FROM A BANK OF CONTAINERS AND TO REFILL SAME - An example dual check valve device described herein includes a housing and a first check valve in the housing. A second check valve is located in the housing adjacent the first check valve and in substantial axial alignment with the first check valve. | 01-26-2012 |
20120103438 | One-handle Type Faucet having a double anti-reverse function to prevent waste materials from flowing backward into the faucet when disaster happens - A faucet includes a faucet body provided with a receiving chamber, a first outlet port and a second outlet port, a first check valve mounted in the receiving chamber of the faucet body and located between the first outlet port and the second outlet port of the faucet body, a water output unit mounted on the faucet body and having an inner portion provided with a receiving space connected to the second outlet port of the faucet body, and a second check valve mounted in the receiving space of the water output unit. Thus, the first check valve co-operates with the second check valve to form a double anti-reverse function to prevent the waste water from flowing backward into the water entrance of the faucet body so as to protect the water source of the faucet. | 05-03-2012 |
20120186670 | Device for ventilating and aerating a fuel tank - A device for ventilating and aerating a fuel tank includes with a tank shut-off valve and two tank pressure control valves. One of the tank pressure control valves opens in response to a negative pressure in the fuel tank and the other one of the tank pressure control valves opens in response to an overpressure in the fuel tank. The opening pressures of the two tank pressure control valves are adjustable flexibly and independent of the respective other valve. | 07-26-2012 |
20120216884 | Check valve construction - A check valve construction is provided having:
| 08-30-2012 |
20120241026 | Check Valve for Abrasive Blaster Pressure Vessel - A check valve is installed in the pressure flow line of an abrasive blaster of the type having a pop-up valve which opens under pressure and closes when depressurized to a predetermined level. The check valve is upstream of the pop-up valve and includes a having a valve chamber in communication with the pressure system for seating a valve mechanism adapted for opening and closing the valve chamber in response to the pressure level in the pressure system for closing the pressure system to back flow when the pressure in the system reaches a predetermined level. | 09-27-2012 |
20120241027 | ADJUSTABLE FAIL-SAFE SUCTION STOP VALVE - An adjustable fail-safe suction stop valve is provided for provding hot gas defrost in refrigeration applications. The dual position valve ( | 09-27-2012 |
20120291889 | OIL CONTROL VALVE AND VARIABLE VALVE LIFT SYSTEM PROVIDED WITH THE SAME - An oil control valve includes a housing having a control port and a drain port, a first seat with a first penetration hole forming a first chamber, a second seat with a second penetration hole forming a second chamber communicated with the control port, the second seat with the housing forming a third chamber communicating with the drain port, a first check valve within the first chamber selectively closing the first penetration hole, a second check valve within the third chamber selectively closing the second penetration hole, and a third penetration hole, a control portion selectively opening the first check valve and simultaneously closing the second check valve or selectively closing the first check valve and simultaneously opening the second check valve and an orifice connecting the first chamber with the second chamber. | 11-22-2012 |
20120325340 | Apparatus to eliminate back drive in push pull system of rotor aircraft and related methods - Apparatus and methods for eliminating back drive in a push pull type control system, are provided. An exemplary apparatus includes a control rod including a pair of spaced apart piston displacement members each configured to carry a check valve. The apparatus also includes a pair of opposite-face check valves each configured to seal against respective opposing face of a piston head to form a hydraulic lock, preventing back drive in the control system. | 12-27-2012 |
20130014837 | PROPORTIONAL POPPET VALVE WITH INTEGRAL CHECK VALVESAANM Huynh; Tam ChiAACI RichfieldAAST MNAACO USAAGP Huynh; Tam Chi Richfield MN US - A poppet valve assembly includes a body and first and second check valves. The body includes opposing first and second axial end portions. The first end portion has a first circumferential surface, a first end surface, and a tapered surface, which seals with a main valve seat. The second axial end portion defines at least one metering slot. The body defines first and second internal passages. The first internal passage includes an opening in the first end surface, is in fluid communication with one of the metering slots, and has a first check valve seat. The second internal passage includes an opening in the first circumferential surface, is in fluid communication with one of the metering slot, and has a second check valve seat. The first and second check valves are disposed in the respective internal passages and are adapted for sealing engagement with the respective check valve seats. | 01-17-2013 |
20130025711 | Self Piloted Check Valve - A self piloted check valve which utilizes closure of a piloting flapper valve to permit development of closure forces for a ball valve. The normally open ball valve has a central flow passage and simultaneously rotates and translates as it traverses between its fully open and fully closed positions. An opening bias system utilizes a combination of a first less stiff spring and a second stiffer spring. Reversible decoupling means disconnects and reconnects the second spring at a short travel distance from the normally open position of the ball, white the first spring always provides opening bias forces to the ball. The pressure induced force required to fully close the ball valve following decoupling of the second spring is more than the force required to overcome the combination of the first and second springs. | 01-31-2013 |
20130037135 | DUAL-SOURCE WATER SYSTEMS - Dual-source water systems may include a selectively controllable mechanism for receiving water from a direct line connection or from a water containment apparatus. The system also may include a filtration system, wherein water may flow through the selectively controllable mechanism to the filtration system. The selectively controllable mechanism may be a valve system and may include a transition switch to switch between water flowing from the direct line connection or from the water containment apparatus. | 02-14-2013 |
20130048110 | Single seal breakaway connector - A safety breakaway connector begins with a body that receives a cooperating insert providing a coaxial flow path. The body has threads, a collar leading to an extension, and a hollow interior. The insert also has threads, a collar that leads to an inner wall, and a hollow interior. The inner wall fits snugly within the extension of the body. Generally, the insert simply slides into and interconnects with the body for quick installation. Two spaced apart biased check valves remain slightly outwardly from the narrow portions of the body and insert. A guard covers the body. Upon the application of the minimum force, the insert separates from the body, and the check valves abruptly close preventing further leakage of fuel. Alternatively, a strategically located O-ring or gasket seals the various components and withstands pressure variations. | 02-28-2013 |
20130092262 | Pumping Device for Sucking or Draining Fluid - A pumping device includes a barrel ( | 04-18-2013 |
20130139913 | SWITCHING VALVE TO CONTROL A FLUID SUBJECT TO HIGH PRESSURE - A switching valve, in particular for controlling a fluid subject to high pressure is described. The switching valve has at least one valve unit, which includes a valve seat element and a switching element guided movably in a guide element, wherein the valve seat element and the switching element interact to provide a switching valve function. The valve seat element and the guide element are provided in a housing. The valve seat element, the guide element and the housing form a through flow channel for the fluid to be controlled. An elastically and/or plastically deformable sealing body is provided in a fully enclosed space between the inner wall of the housing and the outer walls of the valve seat element and of the guide element. The sealing body can be subject to a predetermined pressure to seal off the through flow channel from the housing and subject the valve seat element and the guide element to an inward-directed preload. | 06-06-2013 |
20130228241 | Apparatus, Systems and Methods for Managing Fluids - Apparatuses manage the flow of fluids, such as, for example, water, through pipes. Specifically, the apparatuses of the present invention creates a backward pressure in fluid traversing a pipe, wherein the backward pressure within the pipe provides compression to the fluid effectively compressing entrapped gas bubbles within the fluid, allowing more accurate water meter measurements. Moreover, the apparatuses of the present invention provide backflow prevention. Systems and methods for managing fluids are further provided. | 09-05-2013 |
20130319548 | AUTOMATIC AIR EVACUATION APPRATUS FOR SWIMMING POOL AND SPA FILTERS - The present invention is an air evacuation apparatus that prevents the accumulation of air inside a swimming pool or spa filter by allowing any air to be removed from inside the filter every time the swimming pool pump is turned on. By allowing air to be removed from the filter, the present invention prevents the build-up of dangerous levels of potential energy caused by compressed air inside the filter that can lead to the violent separation of the filter. More important, the air evacuation apparatus of the present invention allows air to be safely and automatically removed from inside of the filter without interfering with the functionality of the filter. | 12-05-2013 |
20140150905 | CHECK VALVE - A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet. The use of seal diaphragms having a non-constant radius allows for faster recovery time for replenishment than prior art devices. | 06-05-2014 |
20140158228 | SPRING ASSISTED ACTIVE MUD CHECK VALVE WITH SPRING - An apparatus, a method and a system control fluid flow through a passageway. A downhole tool pumping apparatus may have a body and an active valve block. The body has a cavity housing a reciprocating piston defining first and second chambers within the cavity. The active valve block has active valves configured to be actively actuated between an open position and the closed position. Two or more hydraulic lines may be connected to each active valve for controlling actuating between the open position and the closed position. A piston having a conduit is slidably disposed through the passageway and selectively closes the conduit of the piston by moving at least one of the piston and a plug. | 06-12-2014 |
20140216574 | RELIEF VALVE - A relief valve includes a valve element and a seal lip. The valve element is configured to open and close a hole, which communicates with a pressure chamber, according to a pressure in the pressure chamber into which fluid is introduced. The seal lip is in an annular shape and equipped to the valve element. The seal lip is configured to be in contact tightly with a valve seat, which surrounds the hole, when being in a valve-close state. The seal lip is inclined toward an inner circumferential periphery of the hole and projected from the valve element toward the valve seat. | 08-07-2014 |
20140305521 | DYNAMIC VALVE SEAL ARRANGEMENT - A valve assembly for a fuel injector that includes a sleeve member having an interior chamber, a piston member supported for movement within the interior chamber of the sleeve member and separating an upstream pressure side of the valve assembly from a downstream pressure side of the valve assembly, and a dynamic sealing device mounted to one of the sleeve member and the piston member for sealingly isolating the upstream pressure side of the valve assembly from the downstream pressure side of the valve assembly. The dynamic sealing assembly includes a PTFE seal member having a generally C-shaped cross-section defining an internal cavity having an opening about the outer periphery thereof the seal member, and a helical spring disposed within the internal cavity of the seal member for providing a constant sealing force to the seal member. The dynamic sealing device is positioned in the valve assembly so that the opening of the internal cavity of the seal member faces away from the upstream pressure side of the valve assembly and towards the downstream pressure side of the valve assembly. | 10-16-2014 |
20140305522 | STREAM SWITCHING SYSTEM - Provided is a valve module for a stream selector that includes first and second pistons axially movable against a biasing force by fluid from an actuation passage acting on undersides of the respective pistons to move a valve head from a closed position to an open position where fluid flows from an inlet passage into a control chamber portion to an outlet passage. Thereby, the stream selector operates at significantly lower actuation air pressures, while providing a valve module that is backwards compatible. | 10-16-2014 |
20150020898 | HYDRAULIC VALVE AND PRESSURE DIFFERENTIAL TYPE LIQUID DISPENSER HAVING THE SAME - A hydraulic valve includes a valve housing and three valve members. The valve housing includes an inlet port, a lateral port for connection to a reservoir, an outlet port, and a chamber. The valve housing further defines a bypass for connection of the inlet port and the chamber, a first passageway for connection of the chamber and the lateral port, a second passageway for connection of the inlet port and the first passageway, and a third passageway for connection of the chamber and the outlet port. The first one-way valve member permits fluid flow from the inlet port through the second passageway to the first passageway only. The regulation valve member is configured to be actuated by fluid coming from the first passageway to cause disconnection between the chamber and the first passageway. The second one-way valve member permits fluid flow from the chamber through the third passageway to the outlet port only. | 01-22-2015 |
20150292531 | METHODS AND SYSTEMS FOR PERFORMING, MONITORING AND ANALYZING MULTIPLE MACHINE FLUID PROCESSES - A valve system for an engine driven apparatus having a fluid system having a fluid reservoir includes a valve assembly structured for use in connection with the fluid reservoir in the fluid system that comprises a first check valve having an outlet and an inlet and a second check valve having an outlet and an inlet, an inlet/outlet port at a common refill/evacuation location, where the inlet/outlet port is in fluid communication with the outlet of the second check valve and the inlet of the first check valve, where application of positive pressure from the inlet/outlet port causes fluid to flow from the common refill/evacuation location through the first check valve into the fluid system, and where application of negative pressure from the inlet/outlet port causes fluid to flow from the fluid reservoir through the second check valve into the first common refill/evacuation location. | 10-15-2015 |
20150300511 | GRAVITY DRAIN VALVE - A drain valve device includes a drain valve housing arranged to be located within a drain opening. The housing has a wall structure surrounding an axis so as to define an internal flow passage through the housing and a strut member depending radially inwardly from the wall structure. The device has one or more valve members. A gas vent passage may be provided in the housing and a vent valve or control member may be provided to selectively prevent flow through the gas vent passage. | 10-22-2015 |
20150337769 | FUEL SUPPLY SYSTEM AND PRESSURE REDUCING DEVICE - A fuel supply system is configured to reduce the pressure of hydrogen gas delivered from a hydrogen cylinder by a high-pressure regulator arranged in series, regulate a flow rate of the pressure-reduced hydrogen gas by a hydrogen flow regulating device, and supply the hydrogen gas to a fuel cell. The high-pressure regulator includes a middle passage in which the hydrogen gas after being pressure-reduced by a first regulator and before being pressure-reduced by a second regulator enters, a rear passage in which the hydrogen gas after pressure-reduced by the second regulator enters, a communication passage allowing communication between the middle passage and the rear passage, and an internal air check valve provided in the communication passage and arranged to allow the hydrogen gas to flow in a direction from the middle passage toward the rear passage and block the hydrogen gas from flowing in a reverse direction thereto. | 11-26-2015 |
20150345651 | METHOD AND APPARATUS FOR BEVERAGE EXTRACTION WITH IMPROVED GAS CYLINDER ACCESS - Devices and methods for extracting a beverage from a container, such as a wine bottle. Beverage can be extracted from a container by inserting a needle through a container closure, such as a cork, delivering pressurized gas into the container via the needle, and dispensing beverage from the container via the needle. A pressure regulator may control a pressure of gas introduced into the container, and a lance used to pierce a pressurized gas cylinder may include a leading face arranged to reliably pierce a cylinder closure. The regulator may include valve features to reduce valve chatter or hammering and provide a more reliable pressure seal. | 12-03-2015 |
20150362087 | PRESSURE LIMITED FLOW PRIORITY BOOST - A hydraulic valve assembly includes an inlet; an outlet; a pressure compensator upstream of the inlet; and a pressure limited flow priority boost valve spool movable between a first position and a second position and comprising an outer spool body and an inner spool body. The outer spool body includes deadhead meter notches disposed such that, in the first position, the spool closes fluid communication between the inlet and the pressure compensator, and such that, in the second position, the spool opens fluid communication between the inlet and the pressure compensator. The inner spool body is movable relative to the outer spool body and is configured to open fluid communication between the inlet and the outlet so as to bypass the compensator. The flow between the inlet and the compensator is a reduced pilot flow. | 12-17-2015 |
20160002898 | AUTOMATIC DRAINING BACK FLOW PREVENTION DEVICE - A double check valve is provided that includes an in-line inlet check valve and an outlet check valve that cooperate to prevent back flow of fluid through the valve. The check valve also includes at least one vent that allows for fluid trapped within the check valve to drain, thereby preventing freezing of the check valve and hydrant to which it is interconnected. The check valve provided omits many superfluous components and thus is smaller and easier to install than check valves of the prior art. | 01-07-2016 |
20160101684 | CHECK VALVE - An embodiment provides a check valve including a valve case, a positive pressure valve having a resin ring sealing member, and a resin negative pressure valve. The positive pressure valve and the negative pressure valve are disposed in the valve case. The positive pressure valve includes a first mount surface and a second mount surface disposed on an inner diameter side of the first mount surface. In the valve case, a presser cap is mounted on the positive pressure valve so as to sandwich the ring sealing member and the negative pressure valve with the first mount surface and the second mount surface of the positive pressure valve. | 04-14-2016 |
20160102780 | Cushioned Check Valve - A cushioned check valve includes a flow channel with an inlet, a check valve, and an outlet. Bypass channels connect the outlet, a cylinder containing a piston, and the inlet. The piston is biased toward a first end of the cylinder by a diaphragm and a hermetically sealed gas volume containing a compressible gas, blocking the bypass channels. When the fluid pressure in the outlet exceeds a nominal operating range, the piston moves toward a second end of the cylinder until the fluid pressure acting on the piston is equalized by the piston bias, and fluid flows through the bypass channel. Once the fluid pressure and piston bias are equalized, the piston returns to a position blocking the bypass channels. | 04-14-2016 |
20160114776 | Brake Cylinder Maintaining With Improved Pressure Regulation - A brake cylinder maintaining system that combines a brake cylinder maintaining check valve and a quick service limiting valve into a single unit to have lower hysteresis, and thus more precise BCM regulation pressure and a smaller pressure offset. The check valve and quick service valve are coupled to provide a single system having multiple valve seats for selective communication between quick service pressure and brake cylinder pressure on one hand, and between a brake cylinder maintaining pressure and brake cylinder pressure on the other hand. | 04-28-2016 |
20160123483 | Modular Check Valve - The invention relates to a check valve which in one embodiment is a modular three-piece valve assembly with easily serviceable and replaceable internal parts, and in another embodiment is a nodular two-piece valve with easily serviceable and replaceable internal parts. In each embodiment, the check valve includes a valve body of two or more pieces detachably attached to each other, and a poppet assembly for sealing the valve removably located within the overall body formed by the attachment of those detachably attached pieces. | 05-05-2016 |
20160123484 | CHECK VALVE - A check valve ( | 05-05-2016 |
20160131265 | Cycle Valve for Use in Hydromethanation Process - A cycle valve can include a valve body and a dynamic sealing spool assembly contained within the interior of the valve body. The dynamic sealing spool assembly includes a sleeve and a gate cartridge assembly which slides within the sleeve between an open and a closed position. The sleeve can include a sleeve opening while the gate cartridge assembly can include two openings, each of which includes a dynamic seat assembly. The dynamic seat assembly in one opening can be formed by upper and lower dynamic seats configured as solid blocks which seal the pathway through the valve when the gate cartridge assembly is in the closed position. The dynamic seat assembly in the other opening can be formed by upper and lower dynamic seats configured as cylinders which form the pathway through the valve when the gate cartridge assembly is in the open position. | 05-12-2016 |
20160160885 | HYDRAULIC CIRCUIT FOR AN ACTUATOR - A hydraulic circuit includes a first oil passage communicating with a first port of an actuator and a second oil passage communicating with a second port of the actuator. A lower portion-communicating oil passage or oil discharge passage communicates with an oil tank. A first valve is provided between the first oil passage and the lower portion-communicating oil passage or oil discharge passage. The first valve is capable of allowing the first oil passage to communicate with the lower portion-communicating oil passage or the oil discharge passage when a pressure of the first oil passage reaches a predetermined value or higher. A second valve is located in a vicinity of the first valve and between the second oil passage and the lower portion-communicating oil passage or the oil discharge passage. | 06-09-2016 |
20160178076 | DUAL CHECK BACKFLOW PREVENTER | 06-23-2016 |
20160201627 | Gas Fuel System Sizing for Dual Fuel Engines | 07-14-2016 |
20180023714 | CHECK VALVE | 01-25-2018 |
137512100 | Dividing and recombining in a single flow path | 4 |
20090071549 | Flapper with insert stops for check valve - A check valve is provided that includes a valve body, a stop bar, a flapper, and a protrusion. The valve body has a flow channel extending therethrough, a first stop support, and a second stop support. The first and second stop supports extend axially from the valve body. The stop bar is coupled to and extends between the first and the second stop supports. The flapper is rotationally mounted to the valve body and comprises a first material. The protrusion is integrally molded with the flapper and extends axially therefrom. The protrusion comprises a second material that is non-metallic and different than the first material. The flapper is moveable between a closed position, in which the flapper at least substantially seals the flow channel, and a fully-open position, in which the protrusion contacts the stop bar and the flapper unseals the flow channel. | 03-19-2009 |
20090120513 | Multiple-input gas adjuster - A multiple-input gas adjuster includes a case having a chamber therein, an input channel, an output channel communicated with the chamber, a first input bore and a second input bore communicated with the input channel and the chamber. A pressure adjusting mechanism has a film assembly, a movable shaft to be reciprocated by the film assembly, a swing device pivoted in the case with an end thereof connected to the movable shaft and an opposite end for sealing the second input bore, and a driving device received in the first input bore and connected to the movable shaft for reciprocation to seal the first input bore. High pressure gas may flows into the first and second input bores through the input channel for pressure adjusting operation. With the action of the pressure adjusting mechanism, the present invention provides a well pressure reducing and stabilizing performance. | 05-14-2009 |
20140202562 | CHECK VALVE WITH SELF-TRAPPING INSERT - A check valve is provided and includes a body including a seat, a hinge bifurcating the seat to define openings and a housing coupled to the hinge and a self-trapping insert of compliant material. The self-trapping insert includes an end portion and is securable in the housing such that the end portion protrudes from a side of the housing to contact with a corresponding check valve flapper in a respective open position. | 07-24-2014 |
20140251461 | CHECK VALVE HAVING PETALS WITH LIFT GENERATING ELEMENTS - A check valve is provided. The check valve includes a petal pivotably coupled to a hinge to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve and a lift generating element coupled to the petal and configured to aerodynamically interact with the fluid flow to generate a lift force on the petal. | 09-11-2014 |
137512200 | One valve carries head and seat for second valve | 5 |
20120222759 | NON-RETURN VALVE HAVING TWO CLOSING BODIES - In a non-return valve having a first closing body and a related first valve seat, and a second closing body and a related second valve seat, according to the invention the first and second valve seats are designed on a single valve seat component and the second valve seat is designed so as to surround the outside of the first valve seat. | 09-06-2012 |
20140144526 | SELF PILOTED CHECK VALVE - A self piloted check valve which utilizes closure of a piloting flapper valve to permit development of closure forces for a ball valve. The normally open ball valve has a central flow passage and simultaneously rotates and translates as it traverses between its fully open and fully closed positions. An opening bias system utilizes a combination of a first less stiff spring and a second stiffer spring. Reversible decoupling means disconnects and reconnects the second spring at a short travel distance from the normally open position of the ball, while the first spring always provides opening bias forces to the ball. The pressure induced force required to fully close the ball valve following decoupling of the second spring is more than the force required to overcome the combination of the first and second springs. Additionally, while the secondary spring is engaged, hydrodynamic damping of the ball opening movement is provided. | 05-29-2014 |
20150114493 | SAFETY VALVE TO RELEASE EXCESS PRESSURE FROM PORTABLE GAS CONTAINER FOR PREVENTION OF EXPLOSION - There is provided a safety valve to release excess pressure from a portable gas container for the prevention of an explosion, wherein, when the internal pressure of a portable butane gas container increases over certain level, the safety valve instantaneously operates to release the excess pressure gas from the container at once through an excess pressure gas outlet, thereby sufficiently lowering the pressure inside the container to prevent the container from exploding | 04-30-2015 |
20150144208 | SPHERICAL AUTOMATIC FLOW EMERGENCY RESTRICTOR VALVE - A ball check valve controls the flow of fluid with a sphere. A body has a fluid path and a recess for receiving the sphere in alignment with the fluid path. The sphere has a retainer which secures a ball check within it. When the valve is in a “Run” position and the rate of fluid flow increases, the ball check seats in a narrow opening of the sphere, thus blocking the flow of fluid. | 05-28-2015 |
20160123321 | VARIABLE DISPLACEMENT COMPRESSOR WITH AN OIL CHECK VLAVE - A variable displacement compressor includes a control valve and a check valve. The control valve is in fluidic communication with a discharge chamber of the compressor and a crankcase of the compressor. The check valve is interposed between the control valve and the discharge chamber. The check valve is configured to allow flow from the discharge chamber to the control valve and to prevent flow from the control valve to the discharge chamber. The check valve includes a ball and a spring. The spring is configured to urge the ball toward a closed position. The spring is characterized by a rate of the spring and a free-length of the spring, and the rate and the free-length are selected to minimize de-stroke noise caused by a rapid change of the compressor operation to a low displacement state. | 05-05-2016 |
137512300 | Diverse types | 9 |
20080251142 | Miniflow valve - In a miniflow valve which is disposed in a miniflow pipe that is connected between the discharge side and suction side of a main pipe where a liquid fed under pressure by a centrifugal pump circulates, and which is opened when the head of the centrifugal pump has exceeded a predetermined value, thereby to return a fluid from the discharge side onto the suction side through the miniflow pipe; a miniflow valve including a pilot valve which is opened or closed on the basis of the differential pressure between the discharge side pressure and suction side pressure of the liquid, and a main valve which is opened or closed in accordance with the opening or closing operation of the pilot valve. The miniflow valve has the simple configuration, and can be opened or closed at a high precision. | 10-16-2008 |
20120174994 | Venting Valve For Cargo Tanks - A venting valve for cargo tanks in, for instance, oil tankers, comprising a valve housing, a valve body and a valve seat. Said valve has a first valve characteristic. According to the invention, another valve, that is built-in in the valve body, is provided since the latter is hollow in order to receive a further valve body that is displaceably arranged for interaction with a further valve seat. According to the invention, the further valve has a characteristic that is different from the characteristic of the first valve. | 07-12-2012 |
20150361924 | REGULATOR HAVING ELECTRONIC VALVE INSTALLED THEREIN - The present invention relates to a regulator having an electronic valve installed therein. The A regulator having an electronic valve installed therein, the regulator including: a first pressure reducing part connected to an inlet port; and a second pressure reducing part connected to the first pressure reducing part, wherein the second pressure reducing part includes: a pressure reducing chamber into which fuel is introduced from the first pressure reducing part; an orifice formed in the pressure reducing chamber; a valve shaft for opening and closing the orifice; a diaphragm for moving the valve shaft by use of an input pressure and an output pressure; and a spring for resiliently supporting the diaphragm, wherein an auxiliary conduit is formed to interconnect the pressure reducing chamber and an upper space of the diaphragm, and an electronic valve for controlling the pressure of an outlet port is installed on the auxiliary conduit. | 12-17-2015 |
20150369260 | REGENERATION DEACTIVATION VALVE AND METHOD - Systems and methods use selective regeneration to aid in controllability and efficiency of a hydraulic circuit. A regeneration deactivation valve can react to a differential pressure when the function is in free air and at risk of cavitating or when then function is doing positive work and needs to be efficient. When the function is at risk of cavitating, the regeneration deactivation valve can react to the potential for cavitation and the regeneration deactivation valve closes so the function regenerates. The regeneration deactivation valve can also react when the function is not at a risk of cavitating and can open up allowing the function to move with more power and efficiency. | 12-24-2015 |
20160047479 | Governor - [Problem(s)] To provide a governor capable of preventing damage to parts when the pressure in the primary side channel rapidly rises, and of alleviating pressure fluctuation in the secondary side channel. | 02-18-2016 |
20160053903 | TIMING VALVE AND KICK-DOWN VALVE - A timing valve includes a moveable piston that has a solid end face at a first end that includes an orifice, an open second end, and side walls that define an enclosed space, a stepped region on an outer surface of the piston, complementary stepped region on an inner surface of a hollow body containing the piston, and an annulus that extends toward the second end defined by a space between the outer surface of the piston and the inner surface of the hollow body. Fluid flowing through the orifice pushes the piston into an open position that forms a space between the stepped and complementary stepped regions that fills with fluid seeping in through the annulus. When pressure on the piston falls below a threshold, the return of the piston to a closed position is slowed by expelling fluid from the space between the stepped and complementary stepped regions. | 02-25-2016 |
20160104903 | VALVE DEVICE - A valve device includes a body, a solenoid valve accommodated in an accommodation hole of the body, and a joint member fixed to the body. The solenoid valve includes: a sleeve having a tubular shape and fitted in the accommodation hole, and including an introduction passage and a delivery passage; and a valve element configured to open and close the passages. A U-seal is disposed between an outer wall surface of the sleeve and an inner wall surface of the accommodation hole. The body has an attachment hole that is located downstream of the delivery passage of the sleeve and opens on an outer surface of the body. The joint member including a backflow reduction valve is fixed to the attachment hole. | 04-14-2016 |
20160109035 | GAS PRESSURIZED PACKING SYSTEM FOR CONTROL VALVES - A gas pressurized packing system for use in a control valve is disclosed. The gas pressurized packing system may include a first packing member, a second packing member and a pressurized gas supply. The first and second packing members may be arranged about, respectively, lower and upper portions of an operating member that extends through a bore in the control valve. The pressurized gas supply may be configured to pressurize a portion of the bore arranged between the first and second packing members. Also disclosed are a low fugitive emission control valve and a low fugitive emission control valve system. | 04-21-2016 |
20180023724 | Elastomeric In-Line Tide Gate Valve | 01-25-2018 |
137512500 | With common biasing means | 1 |
20090133761 | Control valve unit with alternating stop - The invention relates to a control valve unit ( | 05-28-2009 |
137513000 | Mechanically interconnected | 4 |
20090032116 | Ball Check Valve Assembly for Hydraulic Control Circuit - A fluid distribution control element for use in a ball check valve assembly having a valve housing defining a valve chamber and a first inlet opening spaced from a second inlet opening. The control element is arranged inside the valve housing to transition along a substantially linear path of displacement. The control element includes first and second obstruction elements each being configured to respectively fluidly seal the first and second inlet openings. The control element also includes a web portion, having a web length, which secures the first obstruction element to the second obstruction element. The web length is configured to restrict one of the first and second obstruction elements from sealing a respective inlet opening when the other obstruction element is sealing the other respective inlet opening. The web length is further configured to minimize the seat-to-seat distance the control element must travel along the linear path of displacement. | 02-05-2009 |
20100147402 | Connector Device - The present invention relates to a connector device to connect a first and a second fluid container, directly or indirectly. The connector device exhibit a first and a second connection means, a pierceable barrier member, a piercing member, a fluid transfer channel and a pressure normalization channel. The pressure normalization channel is arranged to normalize an increasing pressure inside second fluid container. A valve arrangement permitting fluid to flow in a first and a second direction is arranged in the pressure normalization channel. The valve arrangement exhibit a cracking pressure in at least the first direction. The present invention provides for a connector device which reduces the risk of clogging the barrier filter. | 06-17-2010 |
20100229970 | VALVE APPARATUS - The invention relates to a valve apparatus for setting and monitoring the clamping pressure of a clamping device ( | 09-16-2010 |
20100269927 | Automatic concentric crank-side compressor valve - To reduce the clearance volume for a crank-side concentric suction and pressure valve, it is proposed to arrange a sealing | 10-28-2010 |