Abstract: A vehicle cleaning device includes a cylinder to which a cleaning fluid is supplied; a piston slidably inserted in the cylinder; a spray nozzle unit mounted at a leading end of the piston and configured to spray the cleaning fluid toward an object-to-be-cleaned; and a cap that closes a gap between the cylinder and the piston in an opening of the cylinder through which the piston protrudes. The cap includes a tubular part inside the cylinder, and the tubular part defines an end of movement of the piston. A communication hole is provided between a communication groove provided in an outer peripheral surface of the tubular part and an inner peripheral surface of the cylinder, and the gap between the cylinder and the piston communicates with the outside of the cylinder through the communication hole.

Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.

Abstract: A water stream stop valve for a sprinkler includes a tube body, an annular cover, multiple securing units, and a drainage body having a hole at the center thereof, is arranged above the tube body by multiple support plates. The water stream stop valve is incorporated in a pop-up sprinkler that includes a main body, an expansion pipe with a stop member arranged at top internal diameter thereof, a spray head, and the water stream stop valve arranged inside the expansion pipe and below the spray head. When the spray head falls off expansion pipe, the water stream stop valve will be pushed up to the top of the expansion pipe and stop at the stop member for avoiding the overflow of water while maintaining the spraying at the original area, and delivering a service indication stream.

Abstract: A valve flush apparatus includes a rigid base designed to removably attach to a body of an irrigation valve. A stem extends outwardly from the base and away from the body of the irrigation valve and may be centrally located on the base. The stem and an aperture in the base may define a water passageway through which water may flow through the body of the irrigation valve and through the valve flush apparatus. A hose may also be included which removably attaches to the stem so as to extend the water passageway of the valve flush apparatus. A method includes flushing a clogged irrigation valve through use of the valve flush apparatus.

Abstract: A spray nozzle comprising: a body comprising a duct, a seat arranged at the first end, and including an opening forming an inlet, a guide comprising a tubular jacket and a retaining member, the retaining member retaining the jacket in the duct, a plug mounted to slide axially in the channel of the jacket, the plug being pushed back against the opening by a spring, and in abutment against the bottom of the jacket, the guide comprising a radial vent, which comprises a vent channel isolated from the flow of fluid and connecting the inside of the guide jacket to a bore formed in the body of the spray nozzle.

Abstract: According to one embodiment, a method for generating a dynamic watering plan that reduces water consumption requirements for vegetation is disclosed. An example method includes estimating root depth of vegetation watered by a watering system; determining an allowed water depletion threshold of the vegetation based on the root depth; determining a training watering plan to increase the root depth of the vegetation over time based on the root depth and the allowed water depletion threshold; and transmitting the training watering plan to a flow controller for execution by the watering system.

Abstract: A flow-control faucet aerator is configured to be fitted on a spout of a faucet and includes a housing, an aerating device installed in the housing, and a washer installed above the aerating device. The washer is provided with at least one mouth and an aqueduct circling the mouth. The aqueduct is made of an elastic material and has a neck that has a wall thickness smaller than a wall thickness of the rest of the aqueduct. The neck of the aqueduct deforms at different levels according to different levels of water pressure at the spout of the faucet, so as to change a diameter of the aqueduct and in a flow of the faucet, thereby contributing to flow control and water conservation.

Abstract: A headlight washer assembly includes a bracket secured to a rear surface of a component of a vehicle adjacent an opening therein through which a headlight washer device is configured to extend and retract. The bracket provides a recessed mounting surface for securing the headlight washer device to the component of the vehicle such that, unlike prior art approaches, the fasteners do not protrude from the front surface of the component of the vehicle. A cap concealing the opening in the component is received within the opening flush with the front surface of the component. In one embodiment, the component is a body panel of a vehicle.

Abstract: The invention relates to a device for dispensing a liquid, including a piston that is movable within a chamber and a nozzle connected to the piston such that the movement of the piston causes the movement of the nozzle, wherein one end of the piston engages the chamber so as to form a non-return valve.

Abstract: Exemplary illustrations of a fluid valve, e.g., a return valve for returning residual paint, rinsing agent, and compressed air from a paint line when changing color in a painting system, are disclosed. An exemplary fluid valve may be adjusted between an open position, in which the fluid valve is at least partially open, e.g., for rinsing a paint line with a rinsing agent and for pressurizing the paint line with a new color for the color change, and a closed position, in which the fluid valve is closed, e.g., for applying the new color after the color change. An exemplary fluid valve may switch to the closed position, upon actuation by the medium thereof, e.g., medium flowing through or present in the valve. In another example, a fluid valve may close depending on the fluid present at the input side.

Abstract: A flat type pressure regulated drip emitter with a non-drain valve capabilities that is installable inside a water supply conduit during the conduit manufacturing process and characterized by that the emitter's non-drain valve function is executed independently and separately from its pressure regulation function, through a portion of the emitter's elastomer component that is strained and biased against the emitter's water inlet opening and is moveable towards and away from an additional opening (additional to the emitter's water outlet opening), exposed to the pressure prevailing in the emitter's water exit pool and therefore, at any given time, this portion of the elastomer component is exposed to the maximum differential pressure that prevails in the system—on its one side to the water pressure prevailing in the water supply conduit and on its other (second) side—to the approximate atmospheric pressure.

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: 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: Cooling water is pressurized and supplied via a pipe to an electrified atomization head installed in an atomization cooling area. The jetted particles of the cooling water from the electrified atomization head are electrified and atomized. An electrification voltage is applied from a voltage application unit to the electrified atomization head, and the external electric field generated by applying a voltage between a water-side electrode unit and an induction electrode unit is applied to the cooling water in a jetting process so as to electrify the atomization water and facilitate adsorption to people.

Abstract: A speed limiting mechanisms for turbine-driven fluid distribution apparatus usable with compressible fluid such as compressed air and incompressible fluid such as water. In one form, a flow restrictor is located in the turbine discharge flow path, with the turbine discharge port area selected in relation to the turbine inlet port area according to the desired turbine speed with compressed air. In another form, the incoming fluid flows downstream along the surface of the turbine stator, and is then diverted to enter the rotor chamber in the proper direction. A bleed area on the stator which permits a portion of a compressible fluid which has expanded as it flows along the stator surface to flow to bypass the turbine rotor.

Abstract: Provided is a light cleaning device for washing lights located on an external portion of a vehicle. The device has an elongate housing formed with an inlet port connectable to a source of pressurized liquid and a rinsing head fitted with at least one jet nozzle. The jet nozzle is mounted at a distal end of a telescopically retractable hollow tube of the device, which is normally retracted. There is a liquid flow path from the housing to the rinsing head which can emit a jet spray therefrom when the tube is projected from the housing. The nozzle may have a jet forming member fitted therein to turbulate the jet spray fluid.

Abstract: A check valve which includes a body adapted at one end to receive a liquid source and at the other end to engage with a spray nozzle and having a bore therethrough, an internal annular recess within the body, the upstream end of which body provides a valve seat, a valve assembly located in the recess and having a valve member having a generally curved end directed towards the seat and bias means to normally hold the member against the seat until the pressure at the inlet reaches a pre-determined minimum.

Abstract: A main body of the cleaning apparatus is of a cylindrical structure and internally provided with a compression spring and a movable seal valve which is matched with the inner wall of a casing of the cleaning apparatus. When cleaning solution flows in the cleaning apparatus through a cleaning solution inlet on a base, the pressure of the cleaning solution overcomes the spring force of the compression spring and drives a transmission guide rod, the movable seal valve and a nozzle to move together, and the transmission guide rod stops when moving to a limit position. When cleaning is finished, the pressure of the cleaning solution disappears, the movable seal valve is closed under the function of the compression spring then the transmission guide rod retracts into the casing and closes.

Abstract: A leak stopping sprinkler head includes a hollow body that has an upper portion and a lower portion fluidly connected to a valve body. The upper portion has a spraying nozzle and a first internal diameter. The lower portion has a second, larger internal diameter. The valve body includes a valve seat fluidly connected to the lower portion and a water supply. A hollow spheroid is larger than the first diameter, smaller than the second diameter and has perforations for passage of water. A rigid rod connects the spheroid and a sealing disk for the valve seat. The rod is sized to hold the disk away from the valve seat when the hollow body is intact. Destruction of the hollow body permits the spheroid to move out of the hollow body, pulling the rod and the disk upwardly, causing the disk to seal the valve, stopping the flow of water.

Abstract: A drip irrigation emitter includes a disc shaped body having a pressure reducing labyrinth between a water inlet area and an outlet hole, and a pressure regulating diaphragm changing flow through the outlet hole in response to water pressure fluctuations in the water conduit where the emitter is mounted. The water filtering inlet of the emitter is located entirely at the sides of the disc shaped body.

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: A fluid flow control device, particularly useful for drip-irrigation emitters, for controlling the discharge of a fluid (water) from a discharge port in a fluid conduit (drip irrigation pipe) includes: a housing attachable to the fluid conduit and constructed to define a fluid chamber having an inlet opening communicating with the interior of the fluid conduit, and an outlet opening communicating with the discharge port of the fluid conduit; and a flow control member freely movable within the fluid chamber and having a surface contacting an inner surface of the housing to control the flow of fluid from said fluid chamber out of the fluid conduit via said outlet opening in the housing. One of the contacting surfaces of the flow control member or housing is formed with a protruding pattern such that the two contacting surfaces define small passageways for the flow of fluid from the fluid chamber out of the fluid conduit via the outlet opening.

Abstract: A system and method are provided for selectively containing and dispensing a predetermined liquid material in and from a source container in failsafe manner, wherein a housing is disposed to receive a pressurized fluid stream, and a selectively operable valve assembly is disposed in a flow path defined in the housing. The housing includes an inlet, an outlet, and an intermediate portion extending therebetween, which is formed with an admission port for admitting the predetermined liquid material. The valve assembly is disposed between the housing's inlet and outlet, and may be selectively operated to alternatively open and close access of the predetermined liquid material into the housing. The valve assembly is operably actuated responsive at least in part to the pressurized fluid stream in the flow path, whereby admission of the predetermined liquid material into said housing is keyed by introduction of the pressurized fluid stream into the flow path.

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 reduced size orifice and a relatively long tortuous flow channel that cause a pressure reduction between the water supply conduit and an emitter outlet. The emitter includes an inlet 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 multiple emitter outlets.

Abstract: The invention relates to a spraying tool, in particular as part of a mold-spraying device for spraying at least one section of a wall of a mold with working medium. In at least one embodiment, the spraying tool comprises a plurality of spraying elements for dispensing working medium, and at least one working-medium supply line which supplies working medium to the plurality of spraying elements. In accordance with at least one embodiment, at least some of the spraying elements, the spraying nozzles of which point downwards during operation, are equipped with a separate valve unit which is adjacent to the spraying nozzle and the valve element of which is prestressed elastically into a closed position in which it prevents the dispensing of working medium, but can be transferred under the action of a hydraulic and/or pneumatic pressure into an open position in which it permits the dispensing of working medium.

Abstract: A shower having a shower area changed with variation of water pressure includes: a holding unit, in which a water channel is designed and a feed-water valve is added on the top of the water channel; a spraying water unit, which is sealed with the holding unit, comprising at least two spraying water groups that are a main spraying water group and at least one branch spraying water group; and at least one movable unit, whose number is equal with the number of branch spraying water groups, assembled with the branch spraying water groups in one to one correspondence. In order to change the shower area, we could regulate the opening and closing of the feed-water valve to control water pressure.

Abstract: A flow control device is comprised of a body/connector, a simplified sliding cord, a sealing device, and a stopper. The body/connector connects an overhead sprinkler to a supply line by means of male threaded ends. The body/connector is comprised of a wrench connector, which is located between the two male threaded ends, a guiding tube that sits on the top side of the body/connector with the assistance of the supporting ribs. The guiding tube guides the sliding cord up and down inside the flow control device and sprinkler. The sliding cord is made from a material that is flexible enough to bend inside the supply line and strong enough to return to its original straight shape. The stopper and the sealing device are connected to each other with the sliding cord. The sealing device sits against the sealing surface of the body/connector if the sprinkler head is missing. The stopper prevents the sealing device from making contact with the body/connector during normal operational conditions.

Abstract: A sprinkler pressure regulator module has a compact arrangement with a shiftable member having an upper cavity for receiving water flow debris, and a portion of a bypass valve may reciprocate therein. The module includes a stator plate directing water into a drive mechanism, such as a turbine drive mechanism. The shiftable member receives fluid flow from a radially outboard direction and is sealed with a cup portion receiving the shiftable member to define a cup cavity. A module exterior surface is separated from a sprinkler housing to define a vent cavity. A pressure release vent communicates with the cup cavity, a vent channel between the cup portion and the exterior surface, the vent cavity, and the exterior environment. The vent cavity and cup portion provide receptacles for debris deposit. Ribs around an opening of the vent channel with the vent cavity generally prevent debris from entering the vent channel.

Abstract: A dental water jet apparatus for adjusting a pressurized water stream from a pump to a tip moves pressurized water from a reservoir to a tip in fluid communication with the pump. A flow control knob may be turned to selectively adjust the water pressure supplied by the tip between a minimum and a maximum value. When the flow control knob is turned in a first direction, the volume of fluid directed towards the tip decreases and the volume of fluid returned to an inlet of the pump increases. Fluid may flow from the reservoir and ultimately into the tip to provide oral irrigation and/or cleaning of the teeth, gums, and tongue.

Abstract: An atomizing nozzle structure includes a body, a cover, a rotor and a leak-stop assembly. The body has one axial end being an inlet, the other axial end being an outlet, and a channel connecting the inlet to the outlet. The cover is disposed on the outlet of the body. The rotor is movably accommodated within the channel of the body. The leak-stop assembly is composed of a spring and a plug and disposed in the channel. One surface of the rotor has a locking structure for prohibiting the spring from parting from the rotor in a state where the leak-stop assembly is combined with the rotor. When the elements are separated from one another, the rotor and the leak-stop assembly may be taken out of the channel of the body.

Abstract: A fluid dispenser nozzle comprising: a rigid support; a fluid passageway; and an annular sealing element that is made of elastomer, that surrounds the rigid support, and that is provided with a lip adapted to close off the passageway so long as the fluid is not arriving under pressure from said passageway. The fluid dispenser nozzle being wherein the rigid support comprises a side wall which internally defines the passageway, the side wall extending along a central axis, and wherein the rigid support further comprises an end wall which closes off the fluid passageway at the second end of the side wall, said end wall being provided with at least one hole that is covered by the lip of the sealing element.

Abstract: A nozzle is provided and includes a circuit by which fuel is delivered to a nozzle part and a valve, interposed between the circuit and the nozzle part and upon which the fuel impinges, an opening and closing of the valve being passively responsive to a fuel pressure in the circuit such that the valve thereby modulates a size of an area through which a corresponding quantity of the fuel flows from the circuit to the nozzle part.

Abstract: A light cleaning device for washing lights located on an external portion of a vehicle. The device has an elongate housing formed with an inlet port connectable to a source of pressurized liquid and a rinsing head fitted with at least one jet nozzle. The jet nozzle is mounted at a distal end of a telescopically retractable hollow tube of the device, which is normally retracted. There is a liquid flow path from the housing to the rinsing head which can emit a jet spray therefrom when the tube is projected from the housing. The nozzle may have a jet forming member fitted therein to turbulate the jet spray fluid.

Abstract: A sprinkler comprising a housing fitted with an inlet port connectable to a water supply line and extending into an inlet chamber, a hollow stem member with an inlet end thereof being in flow communication with said inlet chamber and an outlet end thereof being in flow communication with an irrigation head, a diaphragm seal sealingly fixed at peripheral boundaries thereof to the housing and sealingly articulated to the stem member and supporting it at an essentially upright position. The diaphragm is deformable between a first position in which the irrigation head is retracted within the housing and a second position in which the irrigation head projects from the housing. The sprinkler comprising at least one guard portion adapted to prevent insects and undesirable material from entering the sprinkler housing during said second position.

Abstract: A sprinkler comprising a housing fitted with an inlet port connectable to a water supply line and extending into an inlet chamber, a hollow stem member with an inlet end thereof being in flow communication with said inlet chamber and an outlet end thereof being in flow communication with an irrigation head, a diaphragm seal sealingly fixed at peripheral boundaries thereof to the housing and sealingly articulated to the stem member and supporting it at an essentially upright position. The diaphragm is deformable between a first position in which the irrigation head is retracted within the housing and a second position in which the irrigation head projects from the housing.

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: The invention relates to a pressure control valve, particularly for a high-pressure accumulator body of a fuel injection system. The pressure control valve includes a housing and an armature assembly having an armature plate and an armature pin. The armature plate and an end surface of the housing delimit a volume that can be filled with medium taken from the high-pressure accumulator. The volume is reduced by a fill volume.

Abstract: A non-clogging non-pressure compensated drip emitter that utilizes one or more filters or one or more inwardly offset filters that have an inlet that projects inwardly toward a centerline of the hollow cylindrical emitter body and a labyrinth having only turbulent transfer zones after water enters the labyrinth, wherein the labyrinth couples the filter(s) or inwardly offset filter(s) to the pool. Prevents clogging by eliminating dead transfer zones where sediment can accumulate where no turbulence exists. Also prevents clogging when the filter is positioned downward as the inwardly offset filter rises above any sediment when the emitter is positioned in the field in this downward orientation. Also prevents clogging flat filter configurations that have filters offset radially, i.e., redundant filters per emitter.

Abstract: Embodiments of the invention provide a nozzle body including a main body, a turret, a valve assembly, and a feed spigot. The feed spigot can be in fluid communication with a valve chamber via a first feed point and a second feed point. The use of multiple feed points between the feed spigot and the valve chamber can result in increased flow capacity.

Abstract: A channeled shaft check valve assembly includes a conduit with an internal valve seat with a central opening. An actuating member is contained inside the conduit between an outlet fixture and the valve seat. A valve member mounted within the sleeve includes a disc on the opposite side of the valve seat from the outlet end of the conduit and a channeled shaft extending outward from the center of the disc and through the central opening in the internal valve seat. The opposite end of the channeled shaft may also have a disc mounted thereto, allowing for a three position valve. The valve is urged closed under pressure unless an outlet fixture urges the valve open allowing fluid flow along the channeled shaft and through the central opening in the valve seat. In a two disc valve member, the valve may have two closed positions and one open position.

Abstract: An in-line system of mini sprinklers comprising a tubular conduit having inner and outer surface areas, and fitted for the flow of pressurized liquids. This tubular conduit has one or more openings along its length, and at least one mini sprinkler unit embedded within the tubular conduit at each opening. Each mini sprinkler unit comprises a liquid distributing assembly and biasing means. As pressure within the tubular conduit increases, inward force exerted by the biasing means is overcome, and the liquid distributing assembly moves outward. As the liquid distributing assembly protrudes beyond the outer surface of the tubular conduit, liquid escapes and sprinkles onto the ground. As pressure is decreased within the tubular conduit, the biasing means force the liquid distributing assembly back to its original position.

Abstract: A dome pump spray assembly employing a known structure of a liquid dome pump in association with a uniquely configured spray spout to achieve atomization of liquids such as soaps, sanitizers, disinfectants and the like. The spray spout includes a deflector which is in juxtaposition to a spout spray tip having angled partial depth passages therein that extend to a central tapered outlet orifice, the passages and orifices generating a vortex of cyclonic action that serves to achieve atomization of the liquid as it passes therethrough.

Abstract: An apparatus for failsafe control of liquid material passage through a line is provided. The apparatus includes a dispensing control unit for coupling to the line, which includes a housing having an inlet, an outlet, and a conduction port extending therebetween for selectively passing the liquid material received from the line therethrough. A control port is disposed in the housing to direct a flow path of at least a portion of a pressurized fluid stream received thereby. A response valve portion also disposed in the housing is reconfigurable between first and second states responsive to the pressurized fluid stream directed thereto, such that in the first state it seals the conduction port against passage of the liquid material, and in the second state opens the conduction port for passage of the liquid material. The response valve portion is resiliently biased to the first state.

Abstract: A flow control device can be implemented to include an riser, a control valve, a simplified retaining rod, and a ball. The riser can include multiple threaded segments, one or more predetermined breakaway points, and a predetermined length and diameter. The control valve can include a first threaded valve end for detachably connecting to the riser, a second threaded valve end for detachably connecting to a supply line, and a ball housing integrally connected to the first and second valve ends. The ball housing has a predetermined internal housing diameter. The ball is enveloped inside the ball housing, and the ball diameter is smaller than the internal housing diameter and larger than a first opening between the first valve end and the ball housing and a second opening between the second valve end and the ball housing. The retaining rod physically prevents the ball from obstructing the first opening.

Abstract: A system and method are provided for failsafe storage and dispensing of a liquid material from a container having a storage compartment. A dispensing control unit coupled to the container includes a control valve portion operable to selectively direct a flow path of at least a portion of a pressurized fluid stream received thereby, and a response valve portion coupled to the neck portion. The response valve portion is reconfigurable between first and second states responsive to the pressurized fluid stream as directed thereto. The response valve portion in the first state seals an access opening of the container from the storage compartment, while in the second state maintains the access opening in communication with the storage compartment. The response valve portion is resiliently biased to its first state, whereby release of the liquid material therethrough is prevented in the absence of suitable fluid pressure actuation therefor.

Abstract: An apparatus for mixing a catalyst with a resin and then spraying the mixture onto a surface. The catalyst is mixed with air before the catalyst/air mixture is introduced to the resin in the mixing tube. The sprayer is provided with a specially designed check valve to prevent resin and catalyst from back flowing into the air/catalyst supply line. The construction of the check valve prevents it from clogging or becoming stuck shut during operation.

Abstract: The present invention relates to fuel injection in internal combustion engines and to fuel rate shaping. Especially, the invention relates to combustion engines utilizing heavy fuel oil as a fuel. In the body of the device there is arranged a chamber, in which a movable piston is arranged dividing the chamber into a first main volume and a second main volume, the volumes of which depend upon the position of the piston. Moreover, the device comprises at least one auxiliary volume, which can be united with the main volumes. The auxiliary volume can be filled with the fuel entering the device through the first main volume by utilizing the piston motion. By establishing a connection from the auxiliary volume to the second main volume a fuel flow to the second main volume is allowed.

Abstract: A check valve assembly has a valve seat for positioning in a passageway between a water supply and an outlet device such as a sprinkler head or a pipe section. A disc valve is located on the water supply side of the valve seat, and a separate actuator is movably mounted on the opposite side of the seat for movement between an operative position extending through the valve seat to hold the valve in the open position, and an inoperative, retracted position. The disc valve is moved by the actuator into the open position when the sprinkler head is located at the outlet. Release or removal of the actuator as a result of removal of the sprinkler head or other outlet device will allow fluid pressure at the fluid supply end of the passageway to urge the valve into the closed position.

Abstract: An emitter comprising: a plurality of inlet apertures through which liquid enters the emitter; a manifold flow channel into which liquid that passes through the apertures flow; an elastic diaphragm that seats on the manifold flow channel; an outlet aperture through which liquid that enters the emitter exits the emitter; wherein liquid that enters the inlet apertures displaces only a portion of the diaphragm from the manifold channel so that the liquid can leave the manifold channel and flow through the emitter to reach the outlet aperture.

Abstract: This invention is a variable orifice for controlling the mass flow rate of nitrous oxide used as an engine oxidizer, this orifice having an effective size, or area, which changes with changes in the nitrous oxide pressure applied to it. Several design parameters can be changed to provide the desired effective orifice area as a function of pressure. This variable orifice can be designed to maintain an essentially constant nitrous oxide delivery rate over a wide range of nitrous oxide pressures.