Abstract: An electronically controller external damper reservoir assembly (eRESI) can be connected to a passive damper and/or substituted for an existing external reservoir to provide semi-active damping control. The eRESI includes a reservoir and a variable base valve assembly actuated by an actuator. A controller is in communication with the actuator and a sensor providing input signal indicative of vehicle movement and is programmed to generate a damping control signal to the actuator based on the input signal, to dynamically control the damping force outputted by a passive damper hydraulically connected to the eRESI. A P/T sensor can be installed to a gas chamber of a vehicle damper to generate a P/T signal indicative of the pressure and temperature of the gas. The controller is programmed to determine a damper position of the damper based on the P/T signal.

Abstract: A fuel supply valve for supplying fuel from a fuel tank to a fuel cell stack includes: a plunger having a hollow therein, a core part disposed on the plunger, and a block part disposed within the hollow to maintain airtightness between the core part and the plunger, and a space in which the airtightness of the hollow has been maintained by the plunger, the core part, and the block part is defined as a pressure chamber.

Abstract: A magnetically actuated fluid control valve has an internal flooding chamber, an internal piston chamber and a fluid inlet and outlet. The fluid inlet and outlet are in fluid communication with the flooding chamber. A piston is movable within the piston chamber and the flooding chamber. The piston is movable to a closed position wherein fluid cannot flow through the valve, and an open position wherein fluid can flow through the valve. The valve body and piston are fitted with electromechanical and permanent magnets, respectively. Selective electrical excitation of the electromechanical magnets on the valve body cause them to attract or repel the permanent magnets on the piston, causing the piston to move to either the open or closed position.

Abstract: A valve for use in oil and gas production or similar applications includes a plug or other flow barrier disposed in a cavity of a hollow valve body with a metal-to-metal sealing surface that is not reliant on any rubberized or elastomeric material to effect a seal.

Abstract: A valve for use in oil and gas production or similar applications includes a plug or other flow barrier disposed in a cavity of a hollow valve body with a metal-to-metal sealing surface that is not reliant on any rubberized or elastomeric material to effect a seal.

Abstract: A solenoid valve is provided to control a gas supply pressure such as a hydrogen supply valve of a fuel cell system. In particular, the solenoid valve includes: a valve body including a nozzle and a valve chamber, a nozzle opening/closing sheet, and a gas bypass hole formed on the valve body to communicate with a valve chamber of the valve body when the nozzle is closed and supply gas to a first chamber of the valve chamber through the gas bypass hole. With this arrangement, the solenoid valve may inhibit gas leak that can occur in the nozzle due to a diameter error of the nozzle due to a production deviation and a production deviation of a regulator.

Abstract: A vandal resistant adjustable metered handle assembly for a faucet is disclosed. The handle assembly includes a body having a base adapted for attachment to a sink and a sidewall extending in an upward direction with respect to the base. The base is attached to a push button handle via a stem. A spring is associated with the body and the push button handle for metering an amount of water emitting from the faucet and a sleeve is positioned between the body and the push button handle. The sleeve cooperates with the sidewall of the body to adjust the shut-off time of the metered handle assembly. The sleeve may be color-coded to indicate water temperature. The handle assembly can be made vandal resistant by adhesively securing various components together and providing an unconventional attachment member for securing the handle assembly to a sink.

Abstract: A vehicle brake hydraulic pressure control unit including a base body including a brake fluid flow path and a mounting hole portion having a bottom sealing surface and an inner circumferential sealing surface and an assembled part which is assembled into the mounting hole portion so as to communicate with the flow path. The assembled part includes a lower end sealing portion hermetically contacting with the bottom sealing surface of the mounting hole portion to form a lower side sealing portion and an outer circumferential sealing portion hermetically contacting with the inner circumferential sealing surface of the mounting hole portion to form a circumferential sealing portion. A hermetic accommodation space is defined by the lower side sealing portion and the circumferential sealing portion.

Abstract: A method and apparatus are provided for a cost effective pressure dampening device used in a fluid delivery system for substrate processing. In one embodiment, the pressure dampening device is disposed between a mounting substrate and a control valve within a fluid control assembly in fluid communication with a substrate processing chamber. The pressure dampening device is capable of dampening small pressure perturbations in a process fluid which is used for substrate processing.

Abstract: A pressure regulator is provided. In one embodiment, the pressure regulator includes a housing having a supply port for receiving a pressurized medium within the housing and an outlet port for outputting the pressurized medium to a downstream device. The housing of this embodiment also includes a vent port for venting the pressurized medium from the housing. The pressure regulator of this embodiment further includes two pistons disposed within the housing, wherein one piston controls flow of the pressurized medium through the supply port, and the other piston controls flow of the pressurized medium through the vent port, based on the level of pressure within the housing. Other embodiments of pressure regulator devices and systems are also provided.

Abstract: A selector valve capable of maintaining a closed position for a while even if an operating force to a valve element (80) is eliminated when the selector valve (10) is switched from a closed position (braking state) to an open position. The valve element (80) of the selector valve (10) receives an operating force from the outside and a returning force in the opposite direction of the operating force by a valve spring (90). Accordingly, the valve element (80) opens and closes the valve by making the first end (801) of the valve element (80) seat on/unseat from a valve seat (48) on the housing (20) side according to the presence or absence of the operating force. A first port (31) and a second port (32) on both sides of the valve seat (48) are connected or cut off from each other by the opening and closing. The valve element (80) is formed in a stepped structure, and receives a force based on a difference in pressure receiving area by the stepped structure which results from the pressure of hydraulic fluid.

Abstract: A solenoid operated three port pressure control valve assembly of the exhaust pressure bleed type. The valve for the inlet pressure supply port includes a pressure responsive diaphragm with the supply port obturator attached. A bleed orifice in the diaphragm provides viscous dampening of the movement of the obturator and minimizes inlet valve flutter. The valve assembly is disclosed in both normally open and normally closed configurations.

Abstract: A timing lock device for a faucet includes a valve seat, a top cover, a locking washer, a relief rod, a locking valve shaft, and a compression spring. In use, the relief rod may be used to release the water pressure in the pressure storage chamber of the top cover. Then, the locking washer may be moved upward by the locking valve shaft, so that the water may flow outward. When not in use, the water may flow through the return through hole of the top cover into the pressure storage chamber. Thus, the water flow may be stopped automatically by the restoring force of the compression spring and the water pressure in the pressure storage chamber, thereby saving the manual work, and thereby achieving an excellent leakproof effect.

Abstract: The invention concerns a valve, particularly a solenoid valve, with an inlet connection and an outlet connection, having between them a shut-off device with a valve seat and a closure member. In such a valve, it is endeavoured to obtain a small output with a simple design. For this purpose, the closure member has a closing element and a tappet separate from the closing element, the closing element being held in a guiding arrangement.

Abstract: The invention relates to a solenoid valve with an inlet connection and an outlet connection, having between them a blocking device with a valve seat, a closure member and an armature, which influences a position of the closure member in relation to the valve seat. It is endeavoured to make a valve with a simple embodiment and little wear. For this purpose, it is ensured that the armature is arranged in a housing, dividing it into two chambers, and that the armature has a movement stroke with several sections, one first section being in the form of an idle stroke, during which a connection between the two chambers is open and the position of the closure member in relation to the valve seat does not change, and a second section being in the form of an effective stroke, during which the connection between the two chambers is closed and the armature causes or permits a movement of the closure member.

Abstract: A valve of the present invention has housing and a piston member. The piston member is housed in the housing so that it moves between first and positions. The housing includes a piston chamber for guiding the piston member between first and second positions while keeping a sealing engagement with the piston chamber. First and second chambers are positioned adjacent to opposite ends of the piston member so that volumes of first and second chambers are changed depending upon a movement of the piston member. First and second ports are connected when the piston member takes the first position but disconnected when the piston member takes the second position. Third port is connected with the first and second chambers but disconnected from the first and second ports when the piston member takes the first position but connected with the second port when the piston member takes the second position. A partition is defined between the first and second chambers.

Abstract: A suspension control unit as well as a control valve for such unit are provided which are incorporated in a computerized suspension system which automatically and continuously monitors and control's a vehicle's ride performance. The suspension control unit is composed of an actuator and a fluid control unit. A valve is coupled to the actuator for controlling the fluid pressure within the actuator. The valve has an annular body having a side inlet passage and an outlet opening in communication with the reservoir. A poppet driven by a solenoid is slideably fitted within the body wherein the poppet can slide between a first position blocking flow to the outlet opening and a second position not blocking the flow to the outlet opening. The poppet has a shoulder that is exposed to the inlet. Fluid pressure to the inlet of the valve acts on the differential area of the poppet to produce an poppet retracting force which is opposed by the force of an electrically adjustable solenoid.

Abstract: A valve (20B) is provided is provided for regulating the pressure differential between a high pressure side (16) and a low pressure side (18) of a fluid system component (14). The valve (20B) utilizes a damping washer (60) to restrict the flow of fluid from a valve bore (32) in response to translation of a valve spool (30) in the valve bore (32). The damping washer (60) includes an aperture (78) that is piloted on a valve stem (41) extending from the valve spool (30). The damping washing (60) is biased against an open end (66) of the valve bore (32) by a spring (62) engaged between the damping washer (60) and a spring seat (48) that is engaged with the valve stem (41). A separate spring (46) is provided to bias the valve spool (30) against the high pressure fluid acting on the valve spool (30).

Abstract: A metering valve assembly for use in sanitary applications and method of use is disclosed. The metering valve assembly has a relief valve hydraulically controlling a pilot valve covering a water supply inlet. The relief valve is controllably closed by a damping mechanism substantially independently of typical variations in water supply temperature and pressure.

Abstract: A fuel injector nozzle assembly includes a nozzle body that defines a nozzle outlet. A needle valve member is positioned in the nozzle body and moveable between a first position in which the nozzle outlet is blocked and a second position in which the nozzle outlet is open. At least one of the nozzle body and the needle valve member define a first chamber fluidly connected to a second chamber by at least one dual flow rate orifice. The needle valve member displaces fluid from the first chamber into the second chamber through the at least one dual flow rate orifice when moving from its first position to its second position. The dual flow rate orifice is sized and shaped to produce a flow restriction and to slow the movement of the needle valve member when moving from its closed position to its open position, but permit relatively unrestricted displacement flow in the opposite direction.

Abstract: In a magnetic valve controlled fuel injector for a multi-cylinder internal combustion engine with a nozzle needle movably disposed in the injector housing and spring-biased onto a nozzle needle seat wherein high pressure fuel supplied to the nozzle needle through a fuel admission passage lifts the nozzle needle off its seat for discharging fuel therefrom, a control piston with a valve portion is disposed in the injector housing and controlled by an electromagnetic valve for admitting fuel under pressure to the fuel admission passage and a pressure piston is movably disposed in a pressure space formed at one end of a space receiving the nozzle needle spring which, with one end biases the nozzle needle toward its closed position and is supported at its other end by the pressure piston and a throttled communication passage extends between the fuel admission passage and the pressure space for moving the pressure piston toward the nozzle needle when the pressure in the fuel admission passage remains because of a d

Abstract: An electrically controlled flow regulator valve assembly having a diaphragm operated pressure regulator valve with a solenoid operated valve for by-passing the diaphragm to control flow to the regulator valving chamber. In one embodiment the regulator valving chamber communicates through a small restricting orifice with a closed dampening chamber. In another embodiment a second closed dampening chamber is formed to communicate through a second small restrictive orifice with a chamber on the inlet pressure side of the diaphragm.

Abstract: A safety valve of the type that includes a sleeve (1) with a high pressure port (11) and a low pressure port (12); a valve seat (2) and a poppet (3), both slidably inserted in the sleeve and adapted to be brought together to provide a valve interface that is capable of establishing and blocking a fluid communication between the high pressure port and the low pressure port; and a spring (7) adapted to force the poppet against the valve seat, wherein a difference in force between a fluid pressurized in the high pressure port acting on a pressure receiving surface of the poppet and the spring acting against said pressurized fluid urges the poppet to open the valve interface, thereby relieving the high pressure port by a portion of the pressurized fluid admitted out thereof into the low pressure port.

Abstract: A control valve, preferably for use with a fuel injector, includes a valve body defining a solenoid cavity, an inlet passage, an outlet passage and a metering passage extending between the solenoid cavity and the outlet passage. A solenoid is mounted in the solenoid cavity. A valve member has one end attached to the solenoid and is positioned to reciprocate in the valve body between an open position in which the inlet passage is opened to the outlet passage and a closed position in which the inlet passage is closed to the outlet passage. The inlet passage is in fluid communication with the solenoid cavity via the metering passage when the valve member is in its open position. Appropriate sizing of the metering passage can prevent secondary injections by providing adequate pressure relief to the solenoid cavity while also substantially damping any pressure waves that may travel to the solenoid cavity through the metering passage.

Abstract: A two-way insert valve having an insert assembly which can be installed in a receiving bore hole and having a valve cover for closing the receiving bore hole, the insert assembly consisting of two parts, has a bush with several radial passages and with an axial passage and a ring arranged between the bush and the valve cover and has a valve piston by which a connection between the radial passages and the axial passage can be controlled and which is displaceable in opening direction up to a stop. A closing spring urges the valve piston in closed direction. The valve piston in its closed position is guided by the bush at least approximately up to the first end of the bush facing the ring.

Abstract: An electromagnetically actuatable valve that reduces the locking force of the valve has a seat valve, which can be transferred to a closing position counter to the force of a prestressed restoring spring. A valve seat communicates with an inflow side, and a closing member disposed on a tappet communicates on the outflow side of the valve. A magnet armature cooperates with the tappet in a valve dome which communicates with the outflow side. The magnet armature and the tappet are two separate components which positively support one another. On the inflow side, a longitudinal bore of the tappet originates at the closing member, and a first longitudinally movable pin is receive therein largely in a pressure-tight fashion. The cross section of the first pin is at least approximately equivalent to the sealing cross section of the valve seat. The longitudinal bore of the tappet is continued in the magnet armature. A second pin is received in that longitudinal bore.

Abstract: A regulator for maintaining a constant partial vacuum in a region, such as in a piece of process equipment or a fume hood. The regulator includes a path, through which fluid passes from the region to the vacuum source, and a movably mounted piston. The piston is disposed in the path so that the piston may constrict the path at a constriction point. Fluid in the path upstream of the constriction point exerts a pressure on the frontal face of the piston that tends widen the path at the constriction point. The piston is mounted so that the weight of the piston exerts a force on the piston in a direction that tends to widen the path at the constriction point. A force is exerted on the piston, preferably by a spring under compression, in a direction that tends to narrow the path at the constriction point. A buffering gas, introduced to the area between the piston's skirt and the piston mounting structure, may be used to keep noxious fumes from backing up into the environment and/or to provide an efficient bearing.

Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.

Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.

Abstract: A metering valve includes a valve body with an inlet passage and an outlet passage defined therein, and a movable stem member disposed between the inlet passage and outlet passage. An inner sleeve member is configured within the valve body and has an inner diameter surface defining a chamber, the stem member being movable through the chamber. A piston assembly is disposed within the chamber and is configured with the stem member to move therewith. The piston assembly includes a sealing device which engages with the inner sleeve member inner diameter surface during movement of the piston assembly to the closed mode. A metering passage is defined through the stem member between a location above the sealing device to a location below the sealing device such that the rate of return of the piston assembly from the open mode to the close mode is dependent upon the size of the metering passage.

Abstract: A timed watering system for lawns, gardens, and the like, utilizing a flow actuated timer valve. The system is configured to provide a reliable and cost effective, easily implemented system for automatically dispensing a pre-determined amount of water on the area to be watered, with the valve shutting off the flow automatically once the desired amount of water has flowed through the valve. The present system can also be installed directly into the water system by municipal authorities or the like as a means of controlling the use of water and preventing waste of same. Upon reaching the predetermined maximum amount, flow to outdoor faucets would cease, and could not be re-initiated until the end of the month, when the meter is read and the valve re-set. This design may also be utilized in a reverse flow configuration, wherein the backflow pressure initiates closure of the valve, allowing for automated filling of tanks, or preventing damage to equipment to excessive pressure or lack of adequate flow.

Abstract: A self-shutting egress valve comprises a hollow valve body having an annular valve seat provided in a lower portion thereof, a valve piston movably positioned within the valve body and having an escape valve provided on an upper portion thereof, and a push rod depending from the valve piston. The valve body has an orifice and a set of inlet apertures formed respectively on a top portion and around a lower periphery thereon. The valve piston carries an annular, elastic flow controlling element thereon which engages the walls of an upper chamber in the valve body. A set of apertures formed around an upper portion of the push rod is in communication with the escape valve thereabove. Pushing up on the push rod opens the escape valve and thrusts the valve piston upward into the upper chamber of the valve body causing fluid to flow downwards therethrough and also around the flow controlling element.

Abstract: A premix capable of forming a microporous marking structure is prepared by kneading a pouch containing the premix, then opening the pouch and removing the premix therefrom. The mixed premix is then typically poured in a mold, and an absorbent backing layer is placed on the premix. The premix is then heated to form a microporous structure, and then cooled. The dispensing package used in this method is a thin-walled, flexible pouch which contains the premix. This dispensing pouch can eliminate the need to make up a batch of premix immediately prior to casting, together with the need to measure the amount of premix needed for each casting.

Abstract: A water tap, which comprises a housing having an outer cap mounted on its water supply outlet to secure therein a water intake cap, a control shaft, a control bolt and a ring-shaped element. The control shaft comprises an upper circular groove with a stop cock mounted thereon, and a lower circular groove with a ring-shaped water seal mounted thereon. When the control shaft is pushed upward, water flow is permitted to pass through water inlet holes on the water intake cap for discharging out of the outer cap. When pressure force is released from the control shaft, water flow is accumulated in the inner space of the water intake cap and the inner space of the control shaft permitting water pressure to force the control shaft to move downward so as to block up water supply. The control bolt can be turned to move up and down inside the control shaft so as to control the flow rate through the throughholes around the periphery of the control shaft.

Abstract: A faucet of which the displacement of the valve cock is controlled through pressure equilibrium effect, which includes a draw-off tap assembly comprised of a casing, a valve cotter, a valve cock, a sealing plug, wherein said valve cock is mounted on said valve cotter, and said valve cotter is set in a cavity defined by said casing and said sealing plug with the rear end of said valve cotter been arranged to protrude beyond the water passage of said sealing plug. The draw-off tap assembly is fixed at the water outlet of the faucet to control water supply while a water temperature and flow rate regulating means is set at a front position of the faucet.

Abstract: A self-closing valve assembly for sanitary installations is disclosed. The valve assembly includes upper and lower valve housings which define a metering chamber that is normally filled with a metering fluid. A metering means, shiftably mounted in the lower valve housing, includes a first one-way valve means which displaces a predetermined volume of the metering fluid when said valve assembly is shifted to its opened position. A closure means, which includes a second one-way valve means, is operably coupled to the metering means to automatically shift said metering means from its opened to its normally closed position, by transferring the displaced volume of said metering fluid in the metering chamber through a second one-way valve means after a predetermined period of time has elapsed, to thereby close said valve assembly.

Abstract: A control valve for limiting the flow rate of a fluidized medium to a hydraulic motor during start up of the motor so as not to induce loads which exceed predetermined torque limits of apparatus driven by the motor. The control valve includes a poppet which is spring biased to a seated closed position. Increasing inlet-to-outlet pressure differential unseats the poppet in a downstream direction uncovering bypass ports which allow an initial surge of fluid to the motor to accelerate the motor to a predetermined speed at a rate which does not exceed the torque limits. Further downstream movement of the poppet exposes greater cross-sectional areas of main inlet ports which permit additional modulated fluid flow to accelerate the motor to its operational speed. The rate of movement of the poppet in the downstream direction is limited by flow restrictor orifices which conduct fluid which is displaced from a chamber due to the downstream movement of the poppet.

Abstract: A preferred cleaning system (10) is disclosed which includes a hydraulic timer valve (22) which is in fluid communication with a cleaning chemical dispenser (14) and a water supply (12). The hydraulic timer valve (22) preferably includes a bearing arrangement (44) which is spring biased toward a first end (56) of a timer housing (52). When a water supply valve (20) is opened, water flows into housing (52) to cause the bearing arrangement (44) to move from its first position to a second position. When the bearing arrangement (44) reaches its second position, water flow from the water supply (12) to the chemical dispenser (14) is prevented. The movement of the bearing arrangement (44) from its first position to its second position takes a preselected period of time determined by the flow resistance produced by a control valve (35) which controls the flow of water to one side of the bearing arrangement (44) of valve (22). When the water supply (12) is blocked, the valve (22) automatically resets.

Abstract: A duty-cycle type electromagnetic injector assembly has a valve and cooperating valve seat with the valve being positioned away from or against the valve seat depending upon whether an associated electrical coil is energized; a housing generally contains the valve and valve seat, a locator or guide closely confines the valve permitting the valve to be freely moved toward and away from the valve seat while constraining movement of the valve in other directions; the locator or guide is in turn prevented from movement by a retainer operatively connected to the housing and frictionally engaging the locator or guide.

Abstract: A magnetic valve, in particular a fuel metering valve for fuel injection systems of internal combustion engines, is proposed which serves to measure the injection quantity and control the instant of injection. In a valve housing, the magnetic valve has an electromagnet and a valve closing element actuated thereby, which cooperates with a fixed valve seat. To damp the opening movement of the valve closing element against a fixed stop and to keep the hydraulic forces of adhesion between the valve closing element and the stop low, a damping chamber that is open toward the valve closing element is disposed on the stop. As the valve closing element approaches, fluid is positively displaced out of the damping chamber in the form of a squish flow between the stop face and the head element of the valve closing element, so that recoiling is avoided due to thus-generated damping.

Abstract: An adjustable slow closing valve assembly includes a valve body having a bore to receive a valve cartridge with inlet and outlet ports communicating with the bore, the valve cartridge having a tubular retainer providing means defining a valve seat and means reciprocably mounting a valve stem with the stem carrying an operating handle at one end and a valve member adjacent the other end to cooperate with the seat.

Abstract: A slow-closing valve mechanism for controlling metered flow of water for a predetermined time interval from a main inlet to a main outlet in which a timing chamber is provided with a valve seat at one end and an inwardly adjacent main flow inlet and a bleeder opening at its opposite end. A reciprocable valve stem extends through the valve seat and carries a main valve that is biased towards the seat by a relatively long low rate coiled spring surrounding the stem, and also carries a piston that is movable in a valve opening direction by a manually operable actuator at the outer end of the stem, and in a timed valve closing direction at a rate determined by a fixed hydraulic flow passage of an elongate capillary tube connected with the bleeder opening, this tube being coiled externally of the timing chamber and having its inlet in communication with the main inlet flow passage.

Abstract: A subsurface safety valve having a flapper-like pivoting closure element that is moved to and from the open and closed positions by a reciprocating operator assembly. When moved to the open position, the closure element is pivoted out of the flow path to protect it from possible damage.

Abstract: A counterbalance valve assembly for use in a hydraulic system of the type including a hydraulic cylinder for raising and lowering a load provides gradual and continuous exhaustion of hydraulic fluid from the cylinder to facilitate smooth lowering of the load. The assembly includes a counterbalance valve having an outer barrel and an inner barrel forming an annular channel therebetween through which the exhausted fluid passes. The outer barrel includes an inner valve seat and the inner barrel includes an outer relief valve surface which engages in the annular channel to form a relief valve. The inner barrel is movable in a linear direction within the outer barrel for opening and closing the relief valve as the load is lowered. To avoid abrupt changes in the exhausted cylinder fluid flow rate, and thus to avoid abrupt variations in the load lowering rate, the relief valve surface has a long tapered configuration rendering the exhausted fluid flow rate less sensitive to inner barrel movement.

Abstract: The valve having a casing with an inflow and outflow connection which can be separated from or connected to one another by means of a movable valve member which can be brought to bear against a valve seat, the movable valve member being provided with a damping mechanism which prevents blow-like, rapid actuation at least in the closing direction. The damping or restraining mechanism consists of a displacer which is mechanically connected with the valve member, said displacer, during the movement of the valve member, slowly changing its volume through a narrow passage or leak. A non-return valve allows a more rapid movement in the opposite direction.

Abstract: To suppress spurious oscillations of a membrane-suspended plunger forming a valve body cooperating with the valve seat, the plunger is formed with a blind bore into which a small piston extends, with slight clearance, the bore and piston forming a damping cylinder-piston arrangement which includes additionally a damping fluid so that, upon movement of the plunger as the consequence of energization of a solenoid, the damping cylinder-piston system will suppress such oscillations while still permitting positive movement of the plunger and hence seating the operation of the valve with minimum force due to the membrane suspension thereof.

Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.