Abstract: A method for delivering fuel to a combustor of a gas turbine engine includes: injecting fuel into a conduit of a fuel manifold; directing the fuel through a continuous first portion of the conduit; directing the fluid from the first portion into an inflexion of the conduit being a single exit of the first portion; directing the fuel from the inflexion into a second portion of the conduit in serial flow communication with the first portion; and carrying the fuel in the second portion in a direction different from that of the fuel in the first portion. As the fuel flows through the second portion of the conduit, the fuel exits from the second portion of the conduit into a plurality of fuel injection nozzles in exclusive fluid flow communication with the second portion for ejection into a combustor of the gas turbine engine.

Abstract: The present disclosure relates generally to a method for determining a failure of a flow divider within a fuel system, the method being performed by a controller and comprising the steps of: delivering a fuel command, calculating an expected fill time, wherein the expected fill time is indicative of the time required to fill a known fuel manifold volume, determining whether the actual fill time is greater than or equal to an expected fill time; and determining whether an actual fuel pressure value is less than or equal to an expect fuel pressure value based at least in part on at least one environmental signal.

Abstract: A grease injection valve 10 is provided having a valve body 16 including a flow path 15 the valve body. A foreign matter intrusion prevention valve 18 is provided at the upstream side of a check valve 17 in the flow path 15 of valve body 16. Grooves 47 are positioned around the periphery of a foreign matter intrusion prevention valve body 44 in the flow path 15 to provide communication between the downstream side and the upstream side of the foreign matter intrusion prevention valve body 44. When the check valve 17 has a functional failure, high-pressure grease escapes through the grooves 47 to bypass the foreign matter intrusion prevention valve body 44 and is discharged to an exterior of the grease injection valve 10. This can avoid excessive pressure caused by the grease backflow from being applied to the foreign matter intrusion prevention valve 18.

Abstract: The subject matter of this specification can be embodied in, among other things, a fluid flow trim apparatus includes an outer housing defining a cavity having an interior surface and an end wall having an orifice therethrough, a valve body comprising a first valve portion disposed at least partly within the cavity, the first valve portion and the interior surface defining a first fluid flow path, a second valve portion in contact with the interior surface and defining a second fluid flow path. A third valve portion is disposed at least partly within the cavity between the first and second valve portions. The second fluid flow path fluidically connects the third valve portion to a trim cavity. A filter media extends from the first valve portion to the second valve portion and divides a third fluid flow path fluidically connecting the first and seconds fluid flow paths.

Abstract: The present invention has as an object to render a photochromic coating layer free from air bubbles and obtain a uniform layer without film thickness unevenness in the coating layer. In the prevent invention, entrained air in a coating fluid stored in a vessel of a coating unit comprising the vessel, a check valve for preventing back-flow of the coating fluid connected to the vessel, and optionally an ejection nozzle connected to the check valve; air existing inside of the check valve; and optionally air existing inside of the ejection nozzle are removed by plugging an outlet of the coating fluid existing downstream of the check valve and then rotating the coating unit on an axis of the vessel and orbiting the coating unit on a revolution axis simultaneously.

Abstract: A pressure regulator in a rotationally driven sprinkler nozzle housing assembly includes pressure regulation of the upstream pressure to the sprinkler discharge nozzle and flow throttling. Full shut-off of the sprinkler assembly is provided, if desired. Throttling and pressure regulation are adjustable from the top of the nozzle housing.

Abstract: Plume shield shroud (10) for a plasma gun (30) includes a substantially tubular member (14) comprising an axial length, a plume entry end (11), and a plume exit end (13). The shroud (10) is adapted to be mounted to a plasma gun (30). A method of protecting, confining or shielding of a gas plume of a plasma gun (30) includes mounting (20) a gas plume shroud (10) on the plasma gun (30) such that the shroud (10) is sized and configured to substantially surround at least a portion of the gas plume.

Abstract: A valve (101) that can be used as a pressure limiter, for example in a sanitary supply line. The valve (101) according to the invention includes a valve housing (1), a fluid line piece (2) being provided in the housing interior thereof, the downstream side circumferential edge area thereof forming a valve seat (3) for a valve body (4), wherein the valve body (4) can be displaced between an open position and a closed position, in which closed position the valve body (4) acts on the downstream circumferential edge area of the fluid line piece (2), by the pressure of the fluid flowing in through the fluid line piece (2) on one side, and a downstream side pressure acting on the valve body (4) opposite to the regular flow-through direction on the other side.

Abstract: Drip irrigation apparatus including a main water flow channel having associated therewith along a length thereof a plurality of pressure-controlled drip irrigation emitter units and at least one secondary water flow channel extending generally parallel to the main water flow channel and receiving water from at least one of the plurality of pressure-controlled drip irrigation emitter units, the at least one secondary water flow channel having water outlets disposed along the length of the main water flow channel, intermediate the plurality of pressure-controlled drip irrigation emitter units.

Abstract: A spray head for a fluid distribution system that includes a spray head base defining a fluid inlet passage connected to a spray head body, a pair of deflectors extending outwardly from the base and the body, respectively, defining a fluid outlet passage, a piston disposed in a chamber of the body defining a variable orifice between the inlet and outlet, and a deflector plate positioned on an inner surface of the deflector of the base having a deflector plate surface opposing the variable orifice.

Abstract: A drinking mouth portion pointing upward is provided on a plug body of a container main body having a sealed structure. A down-pointing beverage cylindrical member is built into the container main body and has a front edge side thereof communicated with the drinking mouth portion. Provided inside a fluid passage of the beverage cylindrical member is a valve movable in accordance with a pressure difference therein. The valve is not manually opened and closed, but reacts to a suction force in the fluid passage. An up-pointing cut-out section is provided on a lower edge of the beverage cylindrical member, thus allowing one to drink up a content fluid remaining in an inner bottom section. Therefore, a relatively small number of additional parts are needed to address the spewing of a content fluid and the occurrence of a residual liquid at the time of opening the drinking mouth portion.

Abstract: An irrigation sprinkler is provided having a nozzle and a flow control device for reducing fluid flow through the sprinkler when the nozzle is removed, such as might occur due to vandalism. The flow control device is coupled to the nozzle and is moveable between a first irrigating position and a second signaling position. In the first position, the sprinkler discharges fluid for irrigation. In the second position, the sprinkler discharges a reduced amount of fluid and signals that the nozzle has been removed and should be replaced. The flow control device also allows sufficient fluid flow for flushing debris out of the sprinkler when a flush cap is mounted to the sprinkler, instead of the nozzle.

Abstract: An irrigation sprinkler includes a riser and a nozzle rotatably mounted at an upper end of the riser. A gear train reduction is mounted in the riser and a turbine is coupled to the gear train reduction for rotation by water entering a lower end of the riser. A gear driven coupling mechanism mounted in the riser couples the gear train reduction and the nozzle. A pressure regulator is mounted in the riser and is adjustable from a top-side of the sprinkler.

Abstract: An irrigation emitter is provided for delivering irrigation water from a water supply conduit, such as an irrigation supply tube, pipe, or other water supply apparatus, at a low volume or drip-like flow rate. The emitter operates generally through the use of a relatively long flow channel that causes a pressure reduction between the water supply conduit and an emitter outlet. The emitter includes an inlet component for tapping a portion of the water flow from the water supply conduit and, when the water pressure is above a predetermined minimum level, directing the flow to and through the flow channel for subsequent discharge to a desired location. The emitter also may regulate to accommodate for changes in supply pressure. The emitter also may include automatic flushing to dislodge debris trapped within the emitter.

Abstract: A nozzle for generating microbubbles includes a nozzle main body provided with a water introduction port for introducing pressurized hot water from the bottom center of the nozzle main body into the main body. A core cylinder provided with an opening in a circumferential face is inserted into the nozzle main body to form a throttle part between an edge part of the bottom outer circumference of the core cylinder and an edge part of the bottom inner circumference of the nozzle main body. A gripper is provided for pulling the core cylinder in the direction opposite to the inserting direction. Hot water passed through the throttle part is introduced into the inner part of the core cylinder through the opening of the circumferential face of the core cylinder and hot water in which microbubbles are generated is ejected to the outside.

Abstract: A swirler is provided for a fuel injector of a combustor of a gas turbine engine. The swirler is for directing an airflow into the combustor so as to atomize fuel exiting the fuel injector. The swirler has one or more passages for channelling the airflow. Each of the passages is configured to rotate the airflow channelled by that passage about a swirl axis of the swirler, such that on exiting the passage the airflow has an exit swirl angle and a direction of rotation relative to the swirl axis. The swirler is configured such that the exit swirl angle and/or the direction of rotation may be selectively varied.

Abstract: The present invention relates to a filter case for a shower having a function of adjusting a quantity of outflow of a filling material, the filter case including: a cylindrical body having a predetermined length and one end portion opened, for containing a filling material into the interior thereof; and an outflow quantity-adjusting means having a fixing part having one or more communicating holes adapted to communicate with the interior and exterior of the body, the fixing part being fitted to one end portion opened of the body and a rotating part having a discharge hole formed at the inside thereof in such a manner as to be passed through the upper and lower surfaces thereof, the rotating part being screw-coupled to the inner periphery of the fixing part so as to block the communicating holes of the fixing part.

Abstract: A spout cover for a spout having an outlet end includes a first member, having a deflector, mounted to a second member having a liquid soap reservoir and a dispenser for dispensing liquid soap from the liquid soap reservoir toward the deflector. A receiving area is defined between the first and second members for receiving the spout. The first member is movable relative to the second member between a first position permitting the spout to be received in the receiving area and a second position locating the deflector underneath the outlet end of the spout and preventing withdrawal of the spout from the receiving area.

Abstract: A check valve for a spray nozzle including a tubular valve body, a shut-off member and a valve seat, wherein the shut-off member is mounted for movement at least in a longitudinal direction of the tubular valve body. The shut-off member is connected to the valve body by a corrugated tube disposed parallel to the longitudinal direction, wherein the shut-off member is biased toward the valve seat due to the spring effect of the corrugated tube. The check valve is suitable for use in, for example, descaling nozzles.

Abstract: A locking element for a dispenser for discharging a medium, with an insert body, which has an outlet channel and an exit opening for the medium to be discharged, and a piston element which has a piston head co-operating with a piston seat and at least one elastic resilient leg, characterized in that a sealing element is arranged in the outlet channel, which forms the piston seat, and the piston element with the at least one resilient leg is arranged in an enlarging channel portion of the outlet channel, wherein the piston head is pre-tensioned against the piston seat and is pushed out of the piston seat by the exiting medium.

Abstract: An in-line fluid flow control valve includes a housing defining an inlet chamber and an outlet chamber aligned along a outlet axis. The housing further defines a bore with a flow control device and an adjustment mechanism disposed therein for regulating a fluid flow rate. The flow control device defines a fluid passage interconnecting the inlet chamber and the outlet chamber. The plane and the outlet axis define an acute angle therebetween. The angled position of the bore relative to the outlet axis permits access to and adjustment of the flow control device, as well as replacement of the flow control device, without disconnecting any fittings attached to the inlet and the outlet of the control valve.

Abstract: A spraying device is provided that includes a cartridge containing a first fluid, the cartridge being removably connected to a sprayer body. The cartridge is oriented such that gravity exerts a downward force on the first fluid. The sprayer body includes a conduit for receiving a second fluid. A valve is coupled to the conduit. The valve allows the second fluid to flow through the valve, thus creating a Venturi vacuum that draws the first fluid out of the cartridge and into the valve to enable the first and second fluids to mix and form an outlet stream. An orifice meters a predetermined amount of the first fluid into the valve to achieve a predetermined ratio of the first fluid to the second fluid. The outlet stream is then dispensed from a spray nozzle.

Abstract: A nozzle that produces an outlet velocity air, or other fluid jet, is provided with safety passages which achieve the safety requirement of automatically reducing the local exit pressure “dead end” limit to 30 psig or less when the nozzle outlet is partially or completely obstructed. The safety passages do not reduce the effectiveness of the normal function of the air, or other fluid, jet through the provision of a check valve to block undesirable reverse flow in the safety passage(s) thus avoiding ambient fluid flow to the nozzle exit that degrades the nozzle's normal operating air, or other fluid, jet. This is especially useful for supersonic air gun nozzles which have been adapted to digging in the ground, and other purposes, but it is also useful for sonic and subsonic nozzles that are used for other purposes such as cleaning, and other applications.

Abstract: A method of forming polyurethane foam from a resin component and an isocyanate component includes the use of at least one control valve controlling a flow rate of at least one of the resin component and the isocyanate component. The method includes connecting lines having at least a 1 inch diameter to a housing of the control valve. The method also includes coupling a source of gas pressure to the line. At least one of the resin component and the isocyanate component is pressurized with the source of gas pressure to move the resin and/or isocyanate component through the line and into the flow control device at a flow rate of between 5 and 70 gallons per minute.

Abstract: The current invention relates to a dispenser for liquid products comprising a removable liquid holding reservoir, an essentially rigid chamber for holding liquid under pressure and comprising a spring and a piston to place liquid injected into the chamber under pressure, a pump arrangement for pumping liquid from the liquid holding reservoir into the chamber for holding liquid under pressure, the pump being connected to the chamber through a one-way valve preventing liquid to flow from the chamber back into the pump arrangement, the chamber being connected to a spray nozzle through a valve controllable by the user for spraying the liquid.

Abstract: An elastomer membrane based, regulated drip emitter unit, equipped with a non-drip valve, wherein the drip emitter is characterized by that it includes an opening that is exposable to an approximate atmospheric pressure that prevails on the water outlet from the drip emitter; and an additional elastomer membrane portion that is strained and biased against the water inlet opening of the drip emitter for creating a seal with its one side for a non-drain valve and on its other (second) side it is connected to that atmospheric pressure prevailing opening, and wherein the elastomer membrane portion is movable towards that opening in order to open the water inlet opening for enabling a water flow passage from a water supply conduit to the drip emitter, and this from the specific instant that the force exerted by the water pressure prevailing in the water supply conduit on one side of that elastomer portion, overcomes the strain at which that portion was strained and biased against the water inlet opening, as well a

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 common rail single fluid injection system includes fuel injectors ramp shaped injection curves at both the front and back ends of an injection event. This is accomplished by including a check speed control device fixed in position within the check control chamber of a fuel injector. The check speed control device controls the speed of a check by restricting fuel flowing into and out of the check control chamber.

Abstract: A system for passively cooling an electronic component includes a conduit configured to carry a pressurized cooling fluid. The conduit has a plurality of delivery orifices configured to dispense the pressurized cooling fluid from the conduit to cool the electronic component. Each delivery orifice has a hydrogel mechanism associated therewith, which is configured to individually control each of the plurality of delivery orifices to automatically regulate flow of the cooling fluid in response to a variation in a property of an ambient environment surrounding the hydrogel mechanism. The property of the ambient environment is influenced by an operation of the electronic component.

Abstract: A valve chamber is defined in a valve body of the regulating check valve. A first communicating hole and a second communicating hole communicate the valve chamber with a first flow passage and with a the second flow passage, respectively. A valve element is slidably installed in the valve chamber to seat on or lift away from a valve seat to close or open the first communicating hole. A pressure in the first flow passage urges the valve element away from the valve seat, and a pressure in the second flow passage urges the valve element toward the valve seat. The spring is interposed between the valve element and the valve body to urge the valve element away from the valve seat.

Abstract: An irrigation sprinkler spray nozzle is provided that includes a first deflector surface defining a first configuration to project a fluid spray having a first distribution pattern, and a second deflector surface defining a second configuration to project a second fluid spray having a second, different distribution pattern. To select the fluid spray, the nozzle further includes a selector having a first position to select the first deflector surface and a second position to select the second deflector surface.

Abstract: An air-assisted sprayer comprises a platform, a fluid cup, an air reservoir, a spray cap, a pressure line, a fluid reservoir and a poppet valve. The fluid cup is connected to the platform to hold a volume of fluid. The air reservoir extends through the platform and is configured to receive pressurized air. The spray cap is connected to the platform to receive pressurized air from the air reservoir. The pressure line connects the air reservoir with the fluid cup to pressurize the volume of fluid. The fluid reservoir extends from the fluid cup to the platform to provide pressurized fluid to the spray cap. The poppet valve is in fluid communication with the pressure line between the volume of fluid and the air reservoir to prevent fluid from entering the air reservoir.

Abstract: An apparatus for accessorizing water and beverage bottles, including a water mister, a portable humidifier, a vitamin or nutritional supplement dispenser, and other useful accessories, which are quickly, easily, and removably attached to any commercially available consumer water or beverage bottle or container.

Abstract: A spout cover for a spout having an outlet end includes a first member, having a deflector, mounted to a second member having a liquid soap reservoir and a dispenser for dispensing liquid soap from the liquid soap reservoir toward the deflector. A receiving area is defined between the first and second members for receiving the spout. The first member is movable relative to the second member between a first position permitting the spout to be received in the receiving area and a second position locating the deflector underneath the outlet end of the spout and preventing withdrawal of the spout from the receiving area.

Abstract: An irrigation sprinkler spray nozzle is provided that includes a first deflector surface defining a first configuration to project a fluid spray having a first distribution pattern, and a second deflector surface defining a second configuration to project a second fluid spray having a second, different distribution pattern. To select the fluid spray, the nozzle further includes a selector having a first position to select the first deflector surface and a second position to select the second deflector surface.

Abstract: A pressure regulating valve reduces the increased internal pressure in an aerosol spray can, filled with compressed gas, to a working pressure level for a spray valve (12). A regulating piston (52) is kept in equilibrium by a restoring force, and a sealing point (66, 68) is provided, which is closed at a pressure in the pressure regulation chamber (84) that is above the regulated pressure level. To prevent the precision of regulation from being adulterated by the decreasing internal pressure of the can as its contents are progressively withdrawn, a sealing means (86, 66; 67) is proposed, which seals off one free end of the piston (52, 74) from the internal pressure of the can and the regulated pressure. The variable internal pressure of the can is therefore no longer able to act on any axial face of the piston (52), and despite what may be a smaller piston face area, the precision of regulation is improved.

Abstract: A connecting tube structure comprises a connecting tube, screw nuts, check valves, and a rotary water-sealing device wherein the connecting tube has a stop plate at one end to mount to a grooved seat of the rotary-sealing device and a cavity at the other end for the accommodation of one check valve with a movable plug supported by a spring to shut off water discharge from the faucet and prevent the return of dirty water. The rotary water-sealing device, having watertight O-rings adapted to the upper section and a V-shaped expanding side wall extending at the lower section, is sealed to the bottom and internal surface of the shower head and enclosed by the screw nut secured to the shower head, providing high-and-lower pressure water-sealing benefit as well as rotation in 360 degrees to prevent the connecting tube from getting twisted up and hindering the smooth transport of water supply.

Abstract: A spraying head assembly has a tubular body, a cap, an upper plug, a lower plug and a spring. The cap is attached to the body and has a spraying channel, a conical cavity and a spraying hole. The conical cavity is defined inside the cap and communicates with the spraying channel and the spraying hole. The upper plug is held in the body and comprises a spraying end, a connecting end, a head and shaft. The head has a recess communicating with the spraying channel having a conical bottom. Multiple passages are defined in the head and communicate with the recess. The lower plug is mounted movably in the chamber in the body and is connected to the upper plug using the spring. In this arrangement, a liquid supplied to the connecting end forms vortexes in the body to reduce particles of liquid nebulization and raise ejection speed and therefore distance.

Abstract: A sprinkler that restricts foreign particulate matter from interfering with and/or damaging the operating components of a sprinkler is disclosed. The sprinkler may be a pop-up sprinkler such that the outlet or nozzle is not in a fixed position and is moved from a position above the ground to a position generally below or flush with the ground. To prevent particulate matter from entering, such as through the nozzle or outlet, when the flow of water is shut off, the sprinkler may include a protective member located within the sprinkler head to prevent the particulate matter from have an undesirable effect. The protective member forms a one-way obstruction that permits flow to the nozzle and obstructs flow back into the sprinkler such that particulate matter in the water beyond the protective member is restricted from coming in contact with the internal operating components of the sprinkler. The protective member may be a resiliently deformable flap or a hinged flap.

Abstract: A connecting tube structure comprises a connecting tube, screw nuts, check valves, and a rotary water-sealing device wherein the connecting tube has a stop plate at one end to mount to a grooved seat of the rotary-sealing device and a cavity at the other end for the accommodation of one check valve with a movable plug supported by a spring to shut off water discharge from the faucet and prevent the return of dirty water. The rotary water-sealing device, having watertight O-rings adapted to the upper section and a V-shaped expanding side wall extending at the lower section, is sealed to the bottom and internal surface of the shower head and enclosed by the screw nut secured to the shower head, providing high-and-lower pressure water-sealing benefit as well as rotation in 360 degrees to prevent the connecting tube from getting twisted up and hindering the smooth transport of water supply.

Abstract: A shower head structure includes a front cover disc, a water outlet disc, a joint base, a water stopper body and a water stopper. The shower head body is installed to the joint base, and the water stopper body is connected to the water outlet disc, and the water stopper is installed into the hollow hole of the water stopper body. When water flows into the shower head body, the water pressure pushes the water stopper and the water gasket to block the hollow hole and stop water coming out from outlet disc, but the water will come out from the periphery of the water stopper body instead. If an accessory is installed, the water stopper is pushed to interconnect a passage, so that the water will be supplied to the accessory from the middle of the front cover disc to produce a variety of splashes.

Abstract: A drinking straw for controlling the intake of beverages, comprising an elongated hollow member having at least two open ends, at least one end being a suction end adapted for application of a suction force, and at least one end being a liquid end adapted for immersion in a liquid beverage; at least one compartment associated with each at least one suction end and located between the associated at least one suction end and the at least one liquid end and having openings for communicating the liquid beverage therethrough; and at least one insoluble object within the at least one compartment having an outer circumference smaller than an inner circumference of the at least one compartment; wherein the compartment openings and the object are dimensioned to prevent escape of the object from the compartment; and wherein the at least one object seals at least one compartment opening subsequent to the application of the suction force to prevent the movement of the liquid beverage past the opening.

Abstract: A regulating component to regulate fluid flow through the axial passage communicating between the intake end, and mouth engageable distal end, of a drinking straw. The component has an upper wall separated from a lower wall by an engaged sidewall all defining a restriction chamber. When engaged in the axial passage of a drinking straw, fluid traversing the straw all traverses through apertures in the lower and upper wall and thereby through the restriction chamber. Force of the moving fluid on a ball in the restriction chamber acts to raise the ball to seal the aperture in the upper wall. If the fluid reaches too high a speed or continues long enough at a lower speed to move the ball upward it seals the restriction chamber from the exit end of the straw.

Abstract: A mist nozzle easy to disassemble comprises a combination of a body and a locking cap; a water-stopping unit having a ball stopper and a spring is configured inside the combination of the body; and a rotator is configured between the water-stopping unit and the locking cap, the rotator has a protruding contact strip and a protruding retainer disposed on one end thereof corresponding to the water-stopping unit. When the locking cap is separated from the body, the rotator is exposed, and the moment of taking the rotator out, the protruding retainer picks out the spring and the ball stopper of the water-stopping unit as well, so that the components inside the body have the convenience of departing off that is helpful for cleaning the components.

Abstract: Atomizers for administering liquids to the cornea or conjunctiva of the eye, special eye adapters for atomizers and the use of atomizers for ophthalmological administration. The atomizers are free from propellant gas and have an energy reservoir for supplying the energy needed for the atomization process.

Abstract: In a window and lens glass cleaning system for a window/lens glass of a motor vehicle, a washer nozzle, a heating element and a nonreturn valve are in each case arranged on or in a retaining part. The retaining part is fastened on a wiper arm which can pivot over the window/lens glass. The invention largely prevents washer fluid in the washer nozzle from freezing.

Abstract: A check valve of a cleaning device of a vehicle lamp is provided with a cleaning liquid influx portion, a valve disposing portion, and a cleaning liquid efflux portion which are arranged in series in a sliding direction of the piston. A valve body is disposed in the valve disposing portion. The valve body opens and closes a space between the cleaning liquid influx portion and the cleaning liquid efflux portion, when at least a portion of the valve body moves in a direction substantially perpendicular to a sliding direction of a piston.

Abstract: A mister nozzle apparatus has a check valve incorporated therein to shut off the water passing through the misting nozzle to prevent draining of the water from the misting water supply pipes. The check valve has a resilient membrane valve element which opens and closes responsive to water pressure to block or open the nozzle inlet. The check valve is vented to atmosphere through a vent located in the housing between the resilient membrane and the nozzle misting outlet.

Abstract: A magnetic actuator including a mobile magnetic part, a fixed magnetic part, and a mechanism for triggering displacement of the mobile magnetic part relatively to the fixed magnetic part. At least two amagnetic supports, placed in different planes, delimit a gap between them, the fixed magnetic part being integral with at least one of the supports. The supports each have an abutment area for the mobile magnetic part, the abutment area being distinct from the fixed magnetic part. The mobile magnetic part is in levitation in the gap between both supports by magnetic guiding due to the fixed magnetic part when it does not abut against the abutment area of one of the supports. The mobile magnetic part can assume plural stable magnetic positions; in each of these positions, it abuts against a support.

Abstract: A retracting telescoping automatic fire sprinkler is disclosed. In a dry system, the sprinkler extends to its operating position under system pressure that is applied in response to a preaction signal. When system pressure is removed, as in after a test is completed, the sprinkler automatically retracts to its original position.