Abstract: A high-pressure fuel injection system includes a nozzle housing and a nozzle needle that is axially displaceable in the nozzle housing and with which an outflow opening in a valve seat of the fuel injection nozzle can be closed and opened. At least one pulsation reducer is arranged between the nozzle needle and an inside of the nozzle housing. The pulsation reducer includes a plurality of breakwater elements that dampen pressure pulsations in the fuel flowing through the injection nozzle to the outflow opening.

Abstract: A throttle portion is defined between an upper end of a sac chamber and a conical portion of a needle to have a throttle opening area S1. Half of an area surrounded by the throttle portion, the needle, an inner wall of the sac chamber, and a lower end extended line in a cross section of the sac chamber taken along a sac center line is an injection hole upstream area S2. A lift amount, when the throttle opening area S1 is equal to an area which is calculated by multiplying an injection hole area S3 by the number of the injection holes, is a predetermined lift amount L. A viscosity coefficient of fuel is ?. An index value Sa, which is calculated in accordance with an equation as below, is set to 0.5 or greater.

Abstract: A fuel supply nozzle for injecting fuel into a combustor in a shape of a pipe having an outer peripheral wall and an inner peripheral wall extended from a route to a tip. The fuel supply nozzle includes a first fuel discharge passage formed at the inside of the inner peripheral wall extending from the route to the tip, at least one or more vanes disposed on the outer peripheral wall spaced apart from the tip by a given distance and having vane fuel outlets communicating with the first fuel discharge passage, and a burning section formed on a given area adjacent to the tip to allow a thickness between the outer peripheral wall and the inner peripheral wall to be lower than the other section thereof.

Abstract: A pressure control valve for a fuel injection system, in particular a common-rail injection system, for controlling pressure in a high-pressure fuel reservoir, includes a magnetic actuator configured to actuate a spherical valve closing element. The magnetic actuator interacts with a reciprocatingly displaceable armature that is connected to an armature pin in order to transmit a force of the magnetic actuator to the spherical valve closing element. At least one of the spherical valve closing element and the armature pin is axially displaceably guided in a valve piece which forms a valve seat configured to interact with the spherical valve closing element.

Abstract: To provide a technique to suppress an excessive rise of pressure between two pressure reducing valves if the amount of fuel gas consumed by a fuel cell stack decreases. A fuel gas supply apparatus comprises: a gas passage in which fuel gas to be supplied to a fuel cell stack flows; a first pressure reducing valve provided to the gas passage; a second pressure reducing valve provided to the gas passage and disposed at a downstream side of the first pressure reducing valve; a setting module that sets a value of target pressure at a downstream side of the second pressure reducing valve, to a value depending on a consumed amount of fuel gas consumed by the fuel cell stack; and a modifying module that, if the consumed amount decreases by a prescribed amount or more, modifies the value of target pressure of the second pressure reducing valve to a value greater than a corresponding value that corresponds to the consumed amount subsequent to the decrease.

Abstract: A retention system for a fan in a gas turbine engine includes a shaft that is rotatable relative to a bearing support structure about an axis. The retention system includes fore and aft bearings that rotatably support the shaft, with the fore and aft bearings being spaced apart from each other in a direction along the axis. A machined spring reacts between the bearing support structure and the fore bearing to provide a desired axial preload.

Abstract: The present invention provides a shower apparatus that allows the user to have a shower stream with a voluminous feel, even when a small volume of water is discharged, and also with a stimulus sensation arising from water being discharged in a pulsating manner. A shower apparatus F1 periodically changes the volume of air taken into an aeration unit 43 by oscillating a main water stream ejected toward the aeration unit 43 from a throttle unit 42 in a direction crossing the direction of the ejection, so that the bubbly water discharged from a water discharge unit 44 creates a pulsating shower stream.

Abstract: Method for performing a thermal spray process. Method includes heating and/or accelerating a gas to form an effluent gas stream, feeding a particulate-bearing carrier stream through an axial injection port into the effluent gas stream to form a mixed stream, in which the axial injection port includes a plurality of chevrons located at a distal end of said axial injection port, and impacting the mixed stream on a substrate to form a coating.

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: A processing apparatus for fluid with a simple structure, high productivity, ability of precise dispersion, emulsification and grinding, is provided. The apparatus of the present invention comprises at least two processing faces of a first face and a second face, both of which are arranged in a tight-closed passage and positioned opposite to each other to constitute part of said passage, and a contact pressure applying mechanism for putting both faces 1, 2 into closed contact with each other, wherein the rotation of the second processing face 2 in respect of the first processing face 1 may cause dispersion or emulsification of the fluid to be processed between both processing faces 1, 2.

Abstract: A method and apparatus for laterally deflecting and/or separating a flow of particles using a static array of optical tweezers. In an array of optical tweezers with a lattice constant larger than the size of a particle of interest, particles driven past the array by an external force experience an additional interaction with the array of traps. By altering the angle of the array of traps relative to the external force, the particles' movement from trap to trap inside the array can be biased away from the direction of the external force, thereby enabling selective deflection and/or separation of particles.

Abstract: A turbine assembly for a rotary sprinkler head includes a flow control valve, a turbine housing having a fluid inlet and fluid outlet ports, and a rotor mounted in the housing. The flow control valve is moveable between a closed position and a maximum open position, and is spring biased towards the closed position in which all of the fluid flowing into the sprinkler head initially flows into the turbine assembly. When the flow rate through the sprinkler head is sufficient to open the valve, a portion of the fluid flow passes through the valve to bypass the turbine assembly. As the flow rate continues to increase, the valve opens further until it reaches the maximum open position. Once the valve is opened to a predetermined point, as it opens further, up to the maximum position, the valve also increasingly throttles the fluid outlet ports up to a point short of complete blockage of the outlet ports.

Abstract: A processing apparatus for fluid with a simple structure, high productivity, ability of precise dispersion, emulsification and grinding, is provided. The apparatus of the present invention comprises at least two processing faces of a first face and a second face, both of which are arranged in a tight-closed passage, and positioned opposite to each other to constitute part of said passage, and a contact pressure applying mechanism for putting both faces 1, 2 into closed contact with each other, wherein the rotation of the second processing face 2 in respect of the first processing face 1 may cause dispersion or emulsification of the fluid to be processed between both processing faces 1, 2.

Abstract: A swirl pressure nozzle with a nozzle body is proposed, in which an inner area is provided, which has a tapered section with a largest diameter and a smallest diameter. The nozzle has an inlet which leads into the section in an essentially tangential manner, which has a diameter, such that a fluid medium can be guided under pressure through this inlet in an essentially tangential manner into the tapered section of the inner area. The section has an axial length and at its end with the smallest diameter leads into an outlet of the nozzle, which has the same diameter as well as a length. The different parameters are in a ratio to each other, that lies in the following ranges: Dp/Do in the range from 0.42 to 1.56; Ds/Do in the range from 3 to 8; the angle of opening (alpha) of the tapered section greater than 60°; Lo/Do in the range from 0.2 to 1.5.

Abstract: A fuel injector having an arrangement to stabilize the temperature of its components within an engine cylinder in a direct injection application. The fuel injector includes a body, an armature, a needle, a swirl generator, and a seat. The body has an inlet portion, an outlet portion, a body passage, extending from the inlet portion to the outlet portion along a longitudinal axis of the fuel injector. The armature is located proximate the inlet portion of the body, and is operatively connected to the needle. The needle is provided with a substantially uniform cross-sectional area, and the body is selected to surround the needle and form a body passage that has an average cross-sectional area less than two times the substantially uniform cross-sectional area of the needle.

Abstract: A swirl nozzle assembly connected to a water supplying pipe. A main body has one end coupled to the water supplying pipe and the other end internally threaded to form a coupling part. A filter is positioned in an accommodating space which is defined inward of the coupling part of the main body, to filter foreign substances contained in the fire extinguishing water. A nozzle receiving element has one end coupled to the coupling part of the main body with the filter fixedly maintained inward of the coupling part, and the other end internally threaded to form a nozzle coupling part. The nozzle receiving element is defined with a water collecting chamber. A swirl nozzle is coupled to the nozzle coupling part of the nozzle receiving element and is structured to allow water droplets of a predetermined size to be sprayed at a predetermined scattering angle.

Abstract: A technique is provided for controlling fluid flow characteristics in a nozzle assembly. An outwardly opening poppet is movably disposed in an axial conduit to control fluid flow through a forward portion of the axial conduit. A fluid conduit is coupled to the forward portion at an angle configured to provide a desired degree of fluid swirl through the forward portion. The outwardly opening nozzle assembly produces a spray having geometrical characteristics correlated to the desired degree of fluid swirl.

Abstract: The angle of fuel spray at the time of pre-injection is set to a wider angle of spray and the angle of fuel spray at the time of main injection is set to a narrower angle of spray. The pre-injection timing is set so that when fuel spray after the pre-injection is diffused in a cylinder and stratified, the stratified fuel spray is ignited by a rise in the pressure in the cylinder in association with movement of a piston from the bottom dead center to the top dead center. The main injection timing is set so that when the spray stratified by the pre-injection is burned, the fuel spray injected by the main injection passes through the combustion zone while being ignited in the combustion zone, reaches a combustion chamber of the piston, and is burned in the combustion chamber.

Abstract: A unitary over-molded non-clogging system having mechanical breakup capability, a positive shutoff flared wall skirt, having two different overmolded materials forming a laminate combination. The soft flexible face inner portion with a flexible positive shutoff in combination, with mating sealing surface points at two distinct positions, on a conventional actuator body post, forms half of the unitary fitment. A hard portion contour forms the outer half, maintaining registration and retention of the entire overmold fitment within the actuator. This overmold combination fit provides these features without increasing the total amount of parts normally used in conventional spray actuators on pumps and aerosol systems. The actuator can employ a post with or without a mechanical breakup face while the mating surface of the inner soft interfacing portion would compliment it. This type of actuator also can be used as an outlet valve means for pumps, reducing overall cost.

Abstract: A non-clog actuator assembly having a flexible face member that flexes away from first and second positive shutoff mating surfaces when product under pressure flows into contact with the flexible face member. The flexible face member then resiliently springs back into abutting, sealing contact with these shutoff mating surfaces. Preferably, the device flexes away from the two shutoff mating surfaces at a predetermined minimum pressure, such as 55 psig, and then flexes back into sealing contact when the product pressure drops below this minimum pressure, thereby controlling the dispensing of the product with a positive shut off (i.e., the product is dispensed in a fairly constant pattern and then shut off rather than being very strong at the beginning of the spraying process and then dribbling out at the end or under low pressure operations).

Abstract: A method for modifying the swirl motion of a liquid in the swirl chamber of a nozzle, and a swirl generator for nozzles. Such nozzles are used in industrial burners, oil burners and installations for cleaning flue gas and spray-drying food. The invention provides a method and nozzle for adjusting the man droplet diameter at a constant volume flow rate on maintaining the droplet spectrum constant in case of adjustment of the volume flow rate. Partial flows are distributed across supply channels which differ in terms of their cross sections at their point of connection with the swirl chamber. When the partial flows are constituted by the sum of cross-sections of the channels branching off the corresponding flow. Thus, the sums of the cross-sections at the connection point with the swirl chamber are different.

Abstract: The invention relates to a spray head (100) for a fluid dispenser for dispensing a fluid, the spray head being provided with an expulsion channel (1) opening out in a spray orifice (9), and with a moving closure member (10) mounted to move between a closed position, in which it closes said orifice (9), and a spray position, said closure member (10) being urged resiliently towards its closed position, and being displaced towards its spray position by the pressure of the fluid, the spray head being provided with a swirl chamber (20) of variable volume, the volume of said swirl chamber (20) being at its maximum when the closure member (10) is in the spray position, and being substantially zero when said closure member is in the closed position, said spray head being characterized in that said closure member (10) is provided with the spray orifice (9) and with swirl channels (30) which, when the closure member is in the spray position, connect said expulsion channel (1) to said swirl chamber (20), the volume and

Abstract: The angle of fuel spray at the time of pre-injection is set to a wider angle of spray and the angle of fuel spray at the time of main injection is set to a narrower angle of spray. The pre-injection timing is set so that when fuel spray after the pre-injection is diffused in a cylinder and stratified, the stratified fuel spray is ignited by a rise in the pressure in the cylinder in association with movement of a piston from the bottom dead center to the top dead center. The main injection timing is set so that when the spray stratified by the pre-injection is burned, the fuel spray injected by the main injection passes through the combustion zone while being ignited in the combustion zone, reaches a combustion chamber of the piston, and is burned in the combustion chamber.

Abstract: The angle of fuel spray at the time of pre-injection is set to a wider angle of spray and the angle of fuel spray at the time of main injection is set to a narrower angle of spray. The pre-injection timing is set so that when fuel spray after the pre-injection is diffused in a cylinder and stratified, the stratified fuel spray is ignited by a rise in the pressure in the cylinder in association with movement of a piston from the bottom dead center to the top dead center. The main injection timing is set so that when the spray stratified by the pre-injection is burned, the fuel spray injected by the main injection passes through the combustion zone while being ignited in the combustion zone, reaches a combustion chamber of the piston, and is burned in the combustion chamber.

Abstract: A misting head system (24) configured to render a fluid (32) into a mist (36) is provided. The system (24) includes a misting head body (26) and a poppet (20). The misting head body (26) has a cylindrical chamber (28), an inlet (30) configured to pass the fluid (32) into the chamber (28), and an orifice (34) configured to pass the fluid (32) out of the chamber (28) and to render the fluid (32) into the mist (36). The poppet (20) has a cylindrical core (38) configured to force the fluid (32) to pass through a space (44) between the core (38) and an inner wall (46) of the chamber (28), a fracture band (54) coupled to the core (38), configured to center the core (38) within the chamber (28), and having a plurality of flutes (60) configured to fracture the fluid (32) as the fluid (32) passes through the space (44), and an orifice end (40) of the core possessing a plurality of symmetrically spaced slits (48) configured to further fracture the fluid (32).

Abstract: An apparatus for subdividing a viscous liquid conveyed by a gas flow into a plurality of component flows has first and second connecting elements aligned within a tubular casing. The first connecting element has an inflow bore which branches into a number of discharge bores. The inflow bore discharges into a distributing chamber which widens along the direction of flow. The distributing chamber terminates in a rebound face which is aligned concentrically with the inflow bore. The rebound face has inlet openings along a periphery thereof which lead into the discharge bores, which carry the component flows. The first and second connecting elements and tubular casing may be mounted on a body.

Abstract: A nozzle having an undulating surface for enhancing the mixing of a primary flow with a secondary flow or ambient air, without requiring an ejector. The nozzle includes a nozzle structure and design for introducing counter-rotating vorticity into the primary flow either through (i) internal surface corrugations where an axisymmetric line through each corrugation is coincident with an axisymmetric line through the center of the flow passageway or (ii) through one or more sets of alternating convexities and cavities in the internal surface of the nozzle where an axisymmetric line through each convexity and cavity is coincident with an axisymmetric line through the center of the flow passageway, and where the convexities contract from the entrance end towards the exit end. Exit area mixing is also enhanced by one or more chevrons attached to the exit edge of the nozzle. The nozzle is ideally suited for application as a jet engine nozzle.

Abstract: A nozzle mechanism for generating an aerosol-type liquid discharge is provided, which nozzle mechanism ensures one-way movement of liquid during discharge and also has a substantially zero "dead volume" at the tip of the nozzle. The nozzle mechanism includes a flexible nozzle portion with an outlet and a fluid channel, a rigid shaft received within the flexible nozzle portion, and a rigid housing surrounding the flexible nozzle portion and exposing the outlet. The rigid shaft interfaces the outlet to form a first normally-closed, one-way valve, as well as to define a swirling chamber for collecting the liquid which has been channeled from the liquid reservoir, prior to being discharged via the outlet. The outlet has a tubular wall with thickness that decreases along the elongated axis of symmetry for the outlet toward the tip of the outlet. The fluid channel is circumferentially positioned within the flexible nozzle portion to create swirling action of the liquid delivered to said swirling chamber.

Abstract: A nozzle device has a hollow main body, a rotor, and a hollow nozzle cover. The hollow main body has an opening, a hollow chamber communicating with the opening, and a through hole communicating with the hollow chamber. The rotor has a taper first end and a plurality of guide recesses formed on a second end of the rotor. The hollow nozzle cover has a center aperture, a guide groove communicating with the center aperture, and an enlarged groove communicating with the guide groove. The rotor is inserted in the hollow chamber. The hollow nozzle cover is inserted in the opening.

Abstract: Shower apparatus including a valve having an aperture, a first packing preform mounted on the valve, located downstream of the valve, and a stemmed element selectably movable with respect to the valve aperture and operative to selectably press the first packing preform against the valve, thereby substantially sealing the valve aperture.

Abstract: A trigger sprayer apparatus is provided with a separate fluid spinner and fluid flow control valve in a fluid channel of the sprayer housing. The control valve controls the flow of liquid through the fluid channel and the fluid spinner imparts a spin to the flow of liquid prior to its discharge from the fluid channel to create a spray pattern in the liquid. The control valve and fluid spinner are formed as separate component parts of the trigger sprayer to facilitate the assembly of the control valve and spinner into the fluid channel of the sprayer housing.

Abstract: A self-unblocking spray nozzle 10,11 in which an easily removable insert 12 is automatically moved by fluid pressure to form a spray orifice 26, and expands resiliently when the fluid pressure is interrupted. The insert 12 may include swirl vanes 33 to rotate the fluid, and may operate with a static member 14 to form an automatic anti-drip valve.

Abstract: A nozzle for spraying liquids includes a body pierced with a bore, preferably a cylindrical or cylindro-conical bore, and carrying an endpiece pierced with an orifice which may be frustoconical flowing out towards the outside or dihedral opening out towards the outside, this orifice being coaxial with a preferably hemispherical swirl chamber and opening out into the latter via a narrow passage. The endpiece is made from an elastically deformable material, and a restraining component, carried by the body and able to move with respect to the endpiece, acts on the endpiece in order to adjust the cross-section and/or the shape of the the orifice without substantially deforming the swirl chamber.

Abstract: A burner nozzle for petroleum products. The burner nozzle comprises a housing portion with a nozzle assembly disposed therein. In the nozzle assembly are an outer disc and an inner disc disposed in the outer disc. Helical ramps on the outer and inner discs define gaps or fluid flow orifices therebetween. A spring biases the ramp on the inner disc toward the ramp on the outer disc. Fluid pressure in the tube portion forces the ramps apart to increase the orifice size to maintain a relatively high fluid flow velocity through a wide flow rate range. Fluid is discharged from the orifices in a spiraling pattern and impinges a conical inner surface of a swirl chamber from which the fluid is discharged from the burner nozzle.

Abstract: A hole type fuel injector with a nozzle body and needle valve having cooperating inner and outer metering rings providing a metering passage (a) to provide an initial reduced rate of fuel injection during an initial increment of valve lift, (b) to maintain fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment of valve closure and (c) to prevent secondary fuel injection.

Abstract: One spring and two spring embodiments of a fuel injector having a nozzle body and needle valve with cooperating inner and outer metering rings providing a metering passage which (a) meters fuel at a reduced rate during an initial increment of valve lift, (b) assists in maintaining fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment of valve closure and (c) dampens secondary pressure waves to prevent secondary fuel injection.

Abstract: A fuel injection valve includes a fuel swirl generation device, a main fuel injection hole having a comparatively large diameter, and a subsidiary fuel injection hole having a comparatively small diameter. The inclination of the main fuel injection hole with respect to an axis of the fuel injection valve is small so that a fuel swirl remains in the fuel injected therethrough. The inclination of the subsidiary fuel injection hole is great so that the swirl operates so as to push out the fuel through the subsidiary fuel injection hole. The fuel injected through the main fuel injection hole spreads due to the centrifugal force acting on the swirling fuel without depending on an intake gas swirl. The fuel injected through the subsidiary fuel injection hole has a strong penetrating force and can reach the vicinity of a spark plug. This improves ignition without depending on an intake gas swirl. Thus, good combustion is obtained over an entire operation range of a direct fuel injection type engine.

Abstract: An atomizing nozzle is disclosed, which is of simple, inexpensive construction while being capable of highly efficient atomization of liquids. A nozzle case is formed with a cylindrical recess for closely receiving a disc-shaped whirl body and separate nozzle element. The outer wall of the whirl body is formed with a plurality of inclined whirl passages which impart turbulence and whirl to the liquid. The nozzle element has a central, axial discharge passage which communicates with the whirl passages via a peripheral ring duct and a plurality of radial ducts formed on the upstream face of the nozzle member. An acceleration disc is fitted in the recess, on the upstream side of the whirl body. It is formed with a convergent central passage, a peripheral ring duct, and connecting radial ducts, providing for an accelerated flow of fluid to the several whirl ducts. A pressure-deformable regulation bell is placed against the upstream face of the acceleration disc.

Abstract: A spray head for a fluid dispenser comprises a connecting duct for sealingly receiving a delivery tube stub of an aerosol valve; a spray orifice; a chamber connecting the connecting duct and the orifice; a piston member disposed in the chamber and presenting a needle member cooperating with the orifice; and a spring urging the piston member to the orifice. The orifice is sealed by the end of the needle member in an inoperative position, and the piston member is arranged to move against the force exerted by the spring under the influence of an elevated pressure prevailing in the chamber, whereby the orifice is cleared by the needle member. To provide for improved atomization, according to the invention, the rear face of the piston member, which faces away from the needle member, defines a closed space which through a channel is in communication with a point located near the spray orifice for the injection of air from the closed space into the product stream to be sprayed through the spray orifice.

Abstract: The fuel injection valve according to the invention enables an improvement in the fuel preparation and hence a more uniform fuel-air mixture while simultaneously supplying different inlet valves of an engine from one fuel injection valve. Downstream of the valve seat face of the fuel injection valve, the fuel enters a central opening from which tangential conduits lead to at least two swirl chambers disposedly spaced apart from one another and which discharge into these chambers at a tangent. From the center of each swirl chamber, which may be embodied in an attachment, a respective metering opening leads to the outside, by way of which fuel can be injected, well prepared, in the form of cone-shaped fuel streams. The fuel injection valve is suitable either for supplying individual inlet valves with a plurality of fuel streams, or for supplying different inlet valves of the engine with fuel at the same time.

Abstract: A regulator is housed in the expulsion channel of an aerosol container inside which there is a product that is to be dispensed, this product being subject to an expulsion pressure originating from a compressed gas, the said regulator comprising a flexible disk (6) and a rigid disk (7), the latter presenting a protrusion (8) with grooves (9), and further comprising a sealing disk (12) with a central bore (13), and further comprising a nozzle (16). With the flexible disk (6), the grooves (9) in the rigid disk (7) form ducts for the expulsion of the product, and are oriented so as to form tangents to the circumference of the axial duct (10) of the rigid disk (7). This arrangement of the component parts creates turbulence effects in the flow of expelled product, and these effects are utilized to regulate the flow rate at which the product is expelled.

Abstract: An injection nozzle for injecting fuel into the combustion chamber of an air-compressing internal combustion engine is provided, having a valve closing member which lifts inwards from its valve seat as a function of the fuel pressure. The valve closing member is formed by a diaphragm which is firmly clamped in the nozzle body and lifts to a greater extent during the opening pressure of the injected fuel in the direction of the spray openings. A dilatant liquid or a non-dilatant liquid with a certain portion of gas is used as a closing spring for the diaphragm.

Abstract: An intermittent type swirl injection nozzle providing substantially improved spray characteristics while being easy to manufacture and install. The nozzle includes a nozzle body and a needle valve slidably disposed in a guide hole of the nozzle body with a spray hole communicating a body seat formed inside the nozzle body and the forward end of the needle valve. A swirl passage is provided around the needle valve for giving a swirl flow influence around the axis of the needle valve to fuel when the needle valve is lifted from the body seat. A straight passage is provided in a portion where the inner wall of the guide hole and the needle valve make sliding contact for giving the fuel a straight flow influence in the axial direction of the needle valve. The two flows are joined prior to passing through the spray hole.

Abstract: A variable stator for use in a sprinkler head has a two piece stator housing which includes flexible inner sidewalls overlying spaced apertures in an outer sidewall. The stator housing includes a plurality of drive ports which pass a controlled portion of the fluid flow against an impeller that is part of the drive mechanism for rotating the nozzle of the sprinkler head. The inner sidewalls flex inwardly as a function of fluid flow around the stator relative to the controlled fluid flow to the impeller to selectively open the apertures to keep the rate of rotation of the sprinkler nozzle relatively constant. By locating the impeller within the stator, upstream of the remaining fluid flow around the stator and through the spaced apertures, wear on the impeller is minimized. In addition, turbulence through and around the stator is minimized to further reduce wear and for increased fluid flow control.

Abstract: A spray nozzle for manually operated liquid atomizer comprises a valve pin forming a normally closed check valve and biased by a resetting spring so that a head portion thereof is biased toward a co-operating valve seat and an annular stop flange thereof having a larger diameter than this head portion is biased toward a radially projecting holding lip which is formed at the valve-side end of the cavity of a cup-shaped nozzle member having a bottom which supports the resetting spring.

Abstract: A liquid sprinkler comprises a nozzle, a bridge including an outer section overlying the nozzle, and a rotor in alignment with the nozzle bore so as to be impinged by the water jet issuing therefrom. The outer bridge section includes a deflector surface aligned with the nozzle bore and having an enlarged area such that when the deflector surface is impinged by the axial jet from the nozzle bore, it produces an annular spray laterally of the sprinkler, whereby the sprinkler may be converted from a rotary sprinkler producing a rotating jet, to a static sprinkler producing an annular spray by merely removing the rotor from the nozzle and permitting the jet to impinge on the deflector surface area of the outer bridge section.

Abstract: In an intermittent type swirl injection nozzle including a nozzle body having a through hole and a spray hole, a needle valve inserted into the through hole, and a partition member of a cylindrical shape fittedly and fixedly inserted into the through hole, a gap area between the needle valve and the partition member is increased in accordance with the lift of the needle valve. For this purpose, a tapered portion and a top end face are provided on the partition member in a manner that they contact with a tapered portion and a step portion provided on the needle valve when the needle valve is in a position to close the spray hole. The resultant injection nozzle has a variable injection rate and spray angle.

Abstract: An injection nozzle has an insert with helical swirl channels functioning as a single-jet nozzle for air-compression fuel-injection internal combustion engines, with a nozzle needle opening inwards. To achieve fuel atomization constant in terms of engine speed and load in all the operating ranges of the internal combustion engine and having a relatively invariable mushroom-like atomization form on the nozzle outlet side, the nozzle needle can be moved free of stops in the opening direction over the entire operating range, counter to the force of a spring, as a function of the fuel pressure prevailing in the pressure space, in such a way that when there is an equilibrium between the spring force and the force exerted on the needle in the pressure space, an almost always equal pressure ratio independent of the engine speed and arising in the valve-seat region is established, together with a constant outflow speed free to the combustion space.

Abstract: A hole type fuel injector with a nozzle body and needle valve having cooperating inner and outer metering rings providing a metering passage (a) to provide an initial reduced rate of fuel injection during an initial increment of valve lift, (b) to maintain fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment of valve closure and (c) to prevent secondary fuel injection.

Abstract: One spring and two spring embodimenls of a fuel injection having a nozzle body and needle valve with cooperating inner and outer metering rings providing a metering passage which (a) meters fuel at a reduced rate during an initial increment of valve lift, (b) assists in maintaining fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment or valve closure and (c) dampens secondary pressure waves to prevent secondary fuel injection.