Abstract: A pilot valve assembly, for operating a pressure reducing valve disposed within a fuel tank, can include a housing including a first chamber and a second chamber, a first port in fluid communication with the first and second chambers, the first port being configured to receive an atmospheric pressure, a second port in fluid communication with the first and second chambers, the second port being configured to receive a fuel tank pressure, a first pilot valve arranged within the first chamber and configured to open only when a predetermined positive pressure differential exists between the first and second ports, and a second pilot valve arranged within the second chamber and configured to open only when a predetermined negative pressure differential exists between the first and second ports.

Abstract: A shock absorber is provided having a cylinder, a piston rod, a piston body, and a valve. The cylinder is configured to receive fluid. The piston body is connected to the piston rod and is configured to reciprocate within the cylinder between a compression chamber and a rebound chamber. The valve is provided by the piston body having a fluid flow port, a valve seat, a circumferential valving element, and a spring configured to urge the valve body into the valve seat. A primary damping valve and an auxiliary damping valve are also provided.

Abstract: A cylinder cover comprises a block (1) provided with at least a sealing contour (11) and at least a support projection (3) for supporting a discharge valve stop. The support projection (3) is spaced from the sealing contour (11) through at least one gap (4).

Abstract: A system according to an exemplary aspect of the present disclosure includes, among other things, a door having interior and exterior sides, at least one inlet in the interior side, at least one outlet in the exterior side, and a window mechanism to move a window relative to the door. At least one pressure relief valve is in communication with the inlet and outlet, and is mechanically linked for movement with the window. A method according to an exemplary aspect of the present disclosure includes, among other things, mechanically linking at least one pressure relief valve for movement with the window such that the pressure relief valve opens in response to the window beginning to open.

Abstract: A damping valve includes a valve disc including a passage and a valve seat configured to surround an outlet end of the passage, a leaf valve configured to separate from/sit on the valve seat to open/close the passage, and a biasing part configured to exert a variable biasing force on the leaf valve toward the valve disc, and a gap is provided between the leaf valve and the valve seat.

Abstract: An electronic valve assembly for a vehicle suspension damper is described in which a first electronic valve is disposed along a fluid flow path extending between a compression region of a damping cylinder and a fluid reservoir chamber. The first electronic valve controls flow of fluid from the compression region into the fluid reservoir chamber. A second electronic valve is disposed along a fluid flow path extending between a rebound region of the damping cylinder and the compression region. The second electronic valve controls flow of fluid from the rebound region into the compression. The first electronic valve does not reside in the fluid flow path extending from the rebound region into the compression region, and the second electronic valve does not reside in the fluid flow path extending from the compression region into the fluid reservoir chamber.

Abstract: The present disclosure relates to a hydraulic mount having a unidirectional damping membrane. A hole is formed in a membrane and a one-way closure having upper and lower portions, which are different from each other, is inserted into the hole to control a flow of a fluid. The one-way closure means includes: a body which intermittently closes a lower side of the hole formed at a center of the membrane; a column portion which is vertically formed at a center of the body; and a moving closure which is formed at an upper portion of the column portion and closes an upper side of the hole.

Abstract: A subsea hydraulic system comprises a dual (or dual action) check valve on a port for connection to a remotely operated vehicle (ROV). The check valve provides backpressure to flow in either direction. This keeps hydraulic fluid in the hydraulic system, and seawater out. If flow needs to return to the ROV, it may flow out the port, subject to a selected back pressure.

Abstract: A subsea hydraulic system comprises a dual (or dual action) check valve on a port for connection to a remotely operated vehicle (ROV). The check valve provides backpressure to flow in either direction. This keeps hydraulic fluid in the hydraulic system, and seawater out. If flow needs to return to the ROV, it may flow out the port, subject to a selected back pressure.

Abstract: A hydraulic damper including a tube. A piston assembly is disposed slidably inside the tube and divides the tube into a rebound chamber and a compression chamber. A fluid compensation chamber is located outside of the tube. A base valve assembly controls the flow of the fluid between the compression and compensation chambers. A hydro-mechanical compression stop assembly includes a covering member that overlies the base valve assembly and defines a main flow channel and an auxiliary flow channel that each fluidly connect the compression chamber and the base valve assembly. A closing member selectively closes the main flow channel. A first telescoping sleeve is coupled with the piston assembly and a second telescoping sleeve has a base connected to the closing member. A first spring is compressed between the piston assembly and the base to bias the closing member in an extended position.

Abstract: The invention relates to a brake fluid container for a master cylinder in a hydraulic brake system. A safety valve is provided to ensure that the neck of the brake fluid container closes when the brake fluid container is detached from the master cylinder, for example in case of an accident. The safety valve is disposed in a cartridge which can be inserted from outside in a tightly sealing manner into the neck of the container.

Abstract: A shock absorber includes a pressure tube forming a working chamber. A reserve tube is concentric with and radially outward from the pressure tube. A baffle tube is positioned radially outward from the pressure tube. A reservoir chamber is formed between the reserve tube and the baffle tube. A piston is attached to a piston rod and slidably disposed within the pressure tube. A rod guide is attached to the pressure tube and supports the piston rod. An electromechanical valve is positioned within the rod guide. The baffle tube and the pressure tube form a fluid passage between the electromechanical valve and the reservoir chamber.

Abstract: A subsea hydraulic system comprises a dual (or dual action) check valve on a port for connection to a remotely operated vehicle (ROV). The check valve provides backpressure to flow in either direction. This keeps hydraulic fluid in the hydraulic system, and seawater out. If flow needs to return to the ROV, it may flow out the port, subject to a selected back pressure.

Abstract: An apparatus and method for a piston head assembly for an R/C car shock absorber provides for differing flow rates through the piston depending on whether the piston is presently in rebound or compression movement. A piston head may be constructed with a plurality of separate recesses further having at least first and second one way valve holes and a plurality of two way valve holes surrounding the central recess. In one embodiment, two sealing members fit within two separate recesses whereby the sealing member keeps the first and second one way valve holes generally closed. When fluid flow contacts the sealing member during the rebound stroke, fluid flows through the first and second one way valve holes moves the seal member to the open position thereby providing more fluid flow and a quicker rebound damping response.

Abstract: A method for using a medical device in connection with a catheter for regulation or transfer of fluids to and from a patient. The method may include obtaining and using a medical device including a diaphragm having two unidirectional slit valves disposed therein that actuate in different directions, one slit valve actuating in one direction in response to infusion-induced pressure and another slit valve actuating in another direction in response to aspiration-induced pressure. The method may include infusing fluid through one of the unidirectional slit valves, through a lumen, and into a patient's body. The method may also include aspirating fluid from a patient's body through the lumen and another unidirectional slit valve.

Abstract: A dynamic variable orifice includes a housing within which are located a rotor having at least one opening extending therethrough, and at least one seat ring, having an opening therethrough, biased thereagainst. In response to a pressure spike occurring at the inlet of the dynamic variable orifice, the rotor moves axially and rotationally in the housing, to selectively align the opening in the rotor with the opening in the seat ring.

Abstract: An apparatus having a shock-absorbing sleeve is disclosed. The apparatus comprises a housing, an axially moveable sleeve received in the housing and a sealed annular space having a fixed volume axially between the housing and the sleeve. A barrier axially moveable with the sleeve divides the annular space into a first and a second chambers. The first and second chambers are filled with uncompressible dampening fluid. One or more metering passages across the barrier fluidly connect the first and chambers. During the axial movement of the sleeve, the volume of the first chamber is reduced and that of the second chamber is increased, forcing the fluid in the first chamber to flow into the second chamber in a controlled manner to dampen the movement of the sleeve.

Abstract: An adjustable shock absorber includes a base unit, a primary cylinder, a shock rod, a main piston, a biasing member, a hydraulic adjusting unit, a secondary cylinder, a floating piston, a valve module, and a micro-adjusting unit. When an impact force is exerted on the shock rod against a biasing force of the biasing member to force a working liquid to flow from a primary chamber into a liquid sub-chamber of the secondary cylinder, a working gas in a gas sub-chamber of the secondary cylinder is compressed to generate a damping force to act on the working liquid so as to permit the working liquid to flow back to the primary chamber. The damping force can be adjusted by adjusting a needle valve of the micro-adjusting unit.

Abstract: An assembling method of an electric vehicle comprises the steps of: assembling a vehicle body including a frame, wheels and an electric motor; conducting a vehicle body test including confirmation of a state of driving power transmission from the electric motor to the wheels by connecting an electric power supply unit installed in a vehicle body test place to the electric motor of the vehicle body and supplying electric power from the electric power supply unit to the electric motor; detaching the electric power supply unit from the electric motor and transporting the vehicle body which has passed the vehicle body test from the vehicle body test place to a mounting place, in a state in which a battery is not mounted to the vehicle body; and mounting the battery to the transported vehicle body in the mounting place.

Abstract: A subsea hydraulic system comprises a dual (or dual action) check valve on a port for connection to a remotely operated vehicle (ROV). The check valve provides backpressure to flow in either direction. This keeps hydraulic fluid in the hydraulic system, and seawater out. If flow needs to return to the ROV, it may flow out the port, subject to a selected back pressure.

Abstract: An adjustable shock absorber includes a housing defining an enclosed working space. A wall is formed in the working space and separates the working space into first and second fluid chambers. A compression valve is formed in the wall and a microvalve is attached to the compression valve and is operable to control fluid flow through the compression valve.

Abstract: A pressure vessel apparatus for cryogenic capable storage of hydrogen or other cryogenic gases at high pressure includes an insert with a parallel inlet duct, a perpendicular inlet duct connected to the parallel inlet. The perpendicular inlet duct and the parallel inlet duct connect the interior cavity with the external components. The insert also includes a parallel outlet duct and a perpendicular outlet duct connected to the parallel outlet duct. The perpendicular outlet duct and the parallel outlet duct connect the interior cavity with the external components.

Abstract: A hydraulic circuit for instant beverage machines includes a tank, a water extraction pipe contained in the tank, a flow-meter connected to the extraction pipe, a pump, a first vibration-damping valve, a boiler, a second relief and safety valve, a water/steam faucet, a third beverage flow valve, and a recovery tank.

Abstract: Devices and methods for enhancing the operations of fluid systems are provided. For example, this document provides pressure differential relief valves that are well suited for use with medical fluid reservoirs. The pressure differential relief valves provided herein are described in the context of a medical fluid system, such as an extracorporeal blood flow circuit, but the devices and methods provided herein can be implemented in other types of fluid systems including, but not limited to, pneumatic systems, hydraulic systems, fluid power systems, petroleum systems, and various other types of gaseous or liquid-based fluid systems.

Abstract: A braked spring element includes a first spring mechanism for absorbing and releasing energy, a second spring mechanism for absorbing and releasing energy and a damper assembly held between the first spring mechanism and the second spring mechanism, the damper assembly including a damper piston displaceably disposed in a fluid space and a piston rod connected to the damper piston.

Abstract: A system for a vehicle is provided herein. The system includes a fuel vapor canister comprising a shell, a compression plate within the shell and an end cap. The end cap includes a double sided spring interface and a double sided shell sealing surface having double sided identical grooves, only one of which is sealed to the shell. The system further includes a spring coupled to the compression plate and only one spring interface.

Abstract: A valve for a pump arrangement which serves on one hand as a one-way outlet valve subject to functioning, after fluid has been dispensed, of drawing back some fluid which has been dispensed.

Abstract: A device for ventilating and aerating a fuel tank includes a tank shut-off valve and two tank pressure control valves. One of the tank pressure control valves opens in response to an overpressure in the fuel tank and the other one of the tank pressure control valves closes in response to a negative pressure in the fuel tank. A valve unit which is formed from one or multiple of the valves is mountable vertically or horizontally and has a fuel connection which communicates with the fuel tank and a filter connection which communicates with an activated carbon filter. The two connections are generally oriented parallel and point downwards in vertical mounting position of the valve unit and in sideward direction(s) in horizontal mounting position of the valve unit and are arranged at or near the bottom side of the valve unit.

Abstract: The present disclosure relates to a bidirectional valve design that provides for more rapid deflations/evacuation of fluid flow and in one example includes a valve body, a spindle piston movably coupled in a bore of the valve body and an electronically controllable motor that moves the spindle valve between a fluid evacuation position and a fluid fill position. In one example, the spindle piston includes piston structures on ends of a threaded rod. In another example, a mattress system is disclosed that employs the valve and a fluid source to provide quick evacuation of air from a patient support. In another example, the valve is coupled to an alternating pressure block valve which is then coupled to a patient support.

Abstract: A damping valve arrangement for a vibration damper includes a damping valve body, which has at least one through-flow opening for the damping medium, and at least one valve disk which at least partly covers the through-flow openings under the influence of a closing force. The damping valve arrangement includes at least one spring element which has at least one supporting portion axially supported at another structural component part of the damping valve arrangement, and at least one spring portion disposed at a distance from the supporting portion and which introduces a spring force into the valve disk at least indirectly, wherein the spring force of the spring element is directed counter to the closing force acting on the valve disk, and wherein the spring force of the spring element is less than the closing force of the valve disk.

Abstract: A quick disconnect device for connecting a sprayer tank to a portable pump assembly has a tubular body with an internal passageway for conveying gas between the sprayer tank and the portable pump assembly. A first plunger member is mounted within the internal passageway of that device for moving reciprocally between the sprayer tank and the portable pump assembly. A second plunger member, mounted within the internal passageway, moves reciprocally between the sprayer tank and the portable pump assembly. A first resilient member urges the first plunger member away from the sprayer tank to prevent gas from flowing into the sprayer tank. A second resilient member urges the second plunger member toward the sprayer tank to prevent gas from flowing out of the sprayer tank. The first plunger member moves toward the sprayer tank to overcome the spring constant of the first resilient member to direct gas from the portable pump assembly into the sprayer tank.

Abstract: A pressure relief valve and vent assembly include a tank vent including: (i) a vent body having a vent inlet adapted to connect to a tank and arranged to communicate with an exhaust outlet via a fluid passageway; (ii) an exhaust check valve connected to the vent body at or adjacent the exhaust outlet, the exhaust check valve being configured to allow flow in one direction only; and (iii) a pressure relief valve connected to the tank vent inlet and adapted to couple to a tank. The pressure relief valve, when closed, allows for venting air or air/hydrocarbon mixtures from the tank to the exhaust check valve via the fluid passageway. The pressure relief valve, when opened on pressurization of the tank, exhausts tank fluid from the exhaust check valve.

Abstract: A hydraulic power steering system which includes a tank and a power steering pump which takes in a pressure medium from an intake area which is decoupled from the prevailing atmospheric pressure on the side of the tank wall and delivers it under pressure to the power steering system. A valve device builds up a pre-pressure in the intake area and prevents a negative pressure and a positive pressure from building up on the interior of the oil tank.

Abstract: A valve assembly (1) for measuring differential pressures in a fluid system where the valve assembly includes a differential pressure sensor (12) for registration of differential pressures, a first cavity (22) with a calibrating cone (10) displaceable between measuring and a zero point calibration/flushing position. The valve assembly (1) includes a valve body (7) with two connections (13, 14) and a second cavity (15) arranged with a safety valve cone (8) which protects the differential pressure sensor (12). The safety valve cone (8), by differential pressures higher than a dimensioned value, is moved in a direction towards the low pressure side and, as a result, a passage between high and low pressure side is opened, from one connection (13) to the other connection (14) via the second cavity (15) and via provided cavities (24) and recesses (25) in the safety valve cone (8), whereby a pressure equalizing occurs.

Abstract: A valve assembly (1) included in a system for measuring differential pressures in a fluid system and where the valve assembly (1) includes a valve body (7) with an inlet (13) and an outlet (14) for connection to the fluid system, ducts (32, 33) for communication with a differential pressure sensor (12) for registration the differential pressure, a cavity (22) including a calibration cone (10) which is movable in the cavity (22) between a measuring position and a position for zero point calibration/flushing via the valve assembly (1). In instances when the measuring position of the device does not exists, the calibration cone (10) separates the differential pressure sensor (12) from the fluid system, i.e., in its initial position, and, at the same time, the valve assembly (1), in this position, is automatic flushed so as to get rid of any enclosed air in the valve assembly (1).

Abstract: A Dual Action, Low Head Isolation Valve is a plumbing fitting that will isolate the interior pipes of a house from the exterior temperatures of summer and winter while allowing the passage of gasses through the system for venting. This valve would be installed at the top of the household plumbing drainage system, or the top vent, in the attic or above the roof. This valve will allow for the system to draw in air and exhaust the septic gasses, or respirate in both directions with very low head or resistance.

Abstract: A micro valve includes a first valve chamber and a second valve chamber as well as a closing element, which is adjustable between an opening position, in which the valve chambers are connected to each other, and a closing position in which the valve chambers are separated from each other. A reference chamber is provided, which is delimited by the closing element.

Abstract: A safety relief fill valve adapted to being an interface for filling and relieving excess pressure from a closed fluid system. An insert shell retains a piston member for movement between fluid input and fluid holding configurations, the piston member being resiliently biased toward fluid holding configuration. When in fluid holding configuration, the piston member sealingly engages an inlet bore of the insert shell. When in fluid input configuration, the piston member allows fluid flow through the inlet bore. A housing receives the insert shell, thereby limiting relative axial movement and forming a cavity between a portion of the housing the insert shell. This cavity provides mechanical guidance and a flow channel for an overpressure relief system having fluid retaining and fluid relief configurations, the overpressure relief system being elastically biased toward fluid retaining configuration. The elastic bias is overcome responsive to excess pressure within the closed fluid system.

Abstract: A bi-directional pressure relief valve for a plate fin heat exchanger including an elongated heat exchanger tube having ends and a channel for the flow of a fluid from one end of the tube to the opposite end and a bi-directional reed valve positioned within the channel. The reed valve allows fluid to flow within the channel in either direction when a pressure differential across the reed valve is sufficient to urge the reed valve to an open position, thereby enabling the heat exchanger to be used independent of the direction of fluid flow through the heat exchanger.

Abstract: A valve is provided that comprises a valve chamber including first and second valve port openings in communication with first and second inlet/outlets, respectively. A shaft is rotatably disposed in the valve chamber. A first valve plate is rotatably coupled to the shaft that is disposed in the valve chamber over the first valve port opening. The first valve plate has a first opening positioned so as to align with the first valve port opening. The first valve plate is configured to rotate from its closed position covering the first valve port opening to an open position, where rotation of the first valve plate adjustably positions at least a portion of the first opening over the first valve port opening. A second valve plate is configured to rotate with the first valve plate, and to cover the second valve port opening.

Abstract: A valve is provided that comprises a valve chamber including first and second valve port openings in communication with first and second inlet/outlets, respectively. A shaft is rotatably disposed in the valve chamber. A first valve plate is rotatably coupled to the shaft that is disposed in the valve chamber over the first valve port opening. The first valve plate has a first opening positioned so as to align with the first valve port opening. The first valve plate is configured to rotate from its closed position covering the first valve port opening to an open position, where rotation of the first valve plate adjustably positions at least a portion of the first opening over the first valve port opening. A second valve plate is configured to rotate with the first valve plate, and to cover the second valve port opening.

Abstract: A liquid filled pressure/vacuum valve for underground storage tanks has a body having an inlet coupled to the UST and an outlet coupled to atmosphere. The valve has a suction zone disposed in the body and fluidly coupled to the inlet. The valve has a pressure zone disposed in the body and fluidly coupled to the outlet, with the suction zone in fluid communication with the pressure zone. The valve has a separator disposed in fluid communication with the outlet and the pressure zone, and a fluid that flows between the suction zone and pressure zone. The flow of fluid is determined by an increased force due to a pressure differential between the suction zone and pressure zone.

Abstract: A roll-over vent valve comprising a housing formed with a fluid inlet and a fluid outlet, a valve seating bounding an outlet aperture of the housing, a float member received within the housing and axially displaceable between a sealed position wherein a sealing member thereof sealingly bears against the valve seating of the outlet aperture to seal the fluid outlet, and an open position wherein the sealing member is disengaged from the valve seating whereby the fluid outlet is in flow communication with the fluid inlet. There is further provided a pressure-retention device extending intermediate the valve seating and the fluid outlet, to thereby shut fluid flow therebetween as long as pressure differential between the fluid inlet and the fluid outlet does not exceed a minimal pressure threshold.

Abstract: Disclosed is a valve having a housing formed with a downstream port and an upstream port, with an axially displaceable plunger biased into sealing engagement of a major flow path extending between the downstream port and the upstream port for admitting flow only in the upstream direction, with the plunger formed having a normally closed minor flow path for admitting flow only in a downstream direction.

Abstract: A flow valve is provided that comprises a valve chamber including first and second valve port openings in communication with first and second inlet/outlets. The valve further includes a shaft rotatably disposed in the valve chamber, and a first valve plate rotatably coupled to the shaft that is disposed in the valve chamber over the first valve port opening. The first valve plate has a first tapered slot positioned therein so as to align with the first valve port opening. The first valve plate is configured to rotate from its closed position covering the first valve port opening to an open position, where rotation of the first valve plate adjustably positions a wider or narrower portion of the first tapered slot over the first valve port opening. The valve further includes a second valve plate that is configured to rotate with the first valve plate, and to cover the second valve port opening.

Abstract: Disclosed is a fuel conveying device including a valve housing in which a pressure release valve and a non-return valve are arranged parallel to one another, the pressure release valve having a first inlet, which downstream of a valve seat opens into a valve chamber in which a valve body is movably arranged and which is in fluid connection with a second inlet for the non-return valve via a first outlet. The device improves the control response of the pressure release valve by providing the first outlet at the periphery of the valve chamber and in the axial direction with respect to a valve axis such that when the pressure release valve is open the flow from the valve chamber into the second inlet is a substantially radial flow.

Abstract: A coupling assembly includes a female unit and a male unit which is removably connected with the female unit. A valve unit is located in the female unit and includes a core with two flexible disks on two ends thereof. A flange extends radially outward from a lower end of the core and is rested on a support frame in the female unit. The core extends through a through hole in a lower end of sleeve in the female unit. A plurality of paths are defined through the lower end of the sleeve so that by shifting the core to let either of two flexible disks to seal the paths in one direction, the direction of fluid flow can be controlled. The movement of the core is made by moving the sleeve.

Abstract: The invention relates to an expansion valve and to a method for controlling an expansion valve, in which the opening and closing movement of the valve-closure member is set as a function of the pressure difference which is present in a feed opening on the high pressure side and in a discharge opening.

Abstract: The present invention has completely broken from the unreasonable construction of conventional type of relief valve which places weight and lifting disc inside of upper body or lower body. In other words, lifting disc and weight are placed outside of upper body. It is brand-new construction that adopts casket-shaped housing forming flow slot which guides releasing gas to move upwards vertically when the above-mentioned lifting disc ascends by the releasing gas from tank. And also the present invention features that drain part is formed to drain all the time sea water or rain gathering inside of casket-shaped housing to outside of casket-shaped housing and brand-new construction of vacuum relief valve is equipped.

Abstract: A combination pressure relief and vacuum relief valve for mounting on a storage tank is disclosed as having two vertical mounting connections of different elevations; a pressure relief valve mounted on one connection; and a vacuum relief valve mounted on the other connection such that said vacuum relief valve is higher in elevation than said pressure relief valve. The valve is sanitary for use in food and pharmaceutical production and storage and has highly polished surfaces to prevent processed material from sticking. The valve also includes special sloping surfaces in the body and connections to prevent processed material from standing in the valves. The pressure valve and vacuum valve may be removed separately or rotated separately for mounting. The combination valve may be attached on storage tanks or other vessels or conduits.