Abstract: A method includes: filling a chamber having a recirculating valve, a piston, a cap valve, an injector valve and an injection orifice with a liquid by closing the injector valve and circulating the liquid from a source through the recirculating valve and the cap valve; then isolating the chamber from the source by closing the recirculating valve and the cap valve then allowing pressure within the chamber to follow a cylinder pressure by mechanically coupling the cylinder pressure into the chamber; and energizing an injector coil with electric current that pulls a solenoid assembly in an upward direction opening the injector valve, further motion of the solenoid assembly drawing the piston upward, wherein liquid in the chamber is compressed by the piston to a higher pressure than the cylinder pressure, which has the effect of injecting an electronically controlled stream of liquid out of the chamber through the injection orifice.

Abstract: A device for the injection of CMP slurry used in chemical mechanical polishing includes a main body and an outputting member. The main body has an applying end and is configured to be driven to swing over a to-be-polished surface. The outputting member has a channel a plurality of spraying holes communicated with the channel. The channel extends along a central axis. The spraying holes are arranged on the outputting member along a route, and each of the spraying holes faces the to-be-polished surface. The outputting member is pivotally connected to the applying end, so that slurry flows in the channel and is delivered to the to-be-polished surface through the spraying holes. The device for the injection of CMP slurry can evenly distribute the slurry and properly control the slurry in terms of using amount, direction and coverage, and is easy to clean and maintain.

Abstract: An apparatus that dispenses a fluid onto a substrate includes a nozzle located in a position relative to the substrate to dispense the fluid onto the substrate and a blocking plate selectively disposed between the substrate and the nozzle.

Abstract: A washing device for dispensing water in the sanitary field, in particular in a shower or a sink, including an outlet for spraying fluids with a lower throughput rate, as well as a delivery device for increasing the fluid pressure before the spraying. The washing device includes a heating device for heating the water. Atomization is accomplished by way of a fluid jet hitting an obstacle with a high relative speed. Thereby, the obstacle may be a moved or stationary solid body or at least one further fluid jet. Spraying is accomplished by way of the outlet including at least one nozzle set with at least two nozzles, for producing impacting fluid jets and for atomizing the fluid.

Abstract: A system includes a gasification fuel injector. The gasification fuel injector includes a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture. The mixing device is disposed upstream of a tip portion of the gasification fuel injector, and the mixture is discharged from the tip portion.

Abstract: An adjusting assembly adjustably coupling (1) a hand grip to a barrel of a water jetting gun or (2) a shoulder stock to a supply tube of a water jetting gun. The adjusting assembly includes a cam pin. The cam pin (1) couples to said grip and is proximate the barrel or (2) couples to the shoulder stock and is proximate the supply tube. A knob is rotatably coupled to the cam pin. A water jetting gun has a body with an access port leading into a valve cartridge chamber. An adaptor extends through said access port. In the operable state, the adaptor is removable from the body by a person gripping a head of the adaptor with its hand and unscrewing the adaptor by hand without the aid of a hand tool.

Abstract: An apparatus for spraying an oil, such as an MSDS exempt vegetable oil, onto a material handling surface to impede material from adhering to the surface. The apparatus comprises a platform comprising an elevated section configured to support a human operator, and spray equipment comprising a container for containing the oil, a hydraulic pump fluidly coupled to the container, and a spray wand and hose fluidly coupled to the pump. The spray equipment is mounted on the platform and configured to enable an operator to operate the spray wand from the elevated section of the platform.

Abstract: The present disclosure is directed to the introduction of an additive to a contaminated gas stream. An additive introduction system uses a compressor and carbon dioxide separator to provide a treated carrier gas for introduction of an alkaline additive to a contaminated gas stream.

Abstract: An injector for injecting a reagent includes an axially translatable valve member positioned within a housing. An electromagnet is positioned within the housing and includes a coil of wire positioned proximate the valve member such that the valve member moves between a seated position and an unseated position relative to an orifice in response to energizing the electromagnet. A connector coupled to the housing includes an inlet tube concentrically aligned with and surrounding a return tube. The inlet tube is adapted to receive pressurized reagent from a source of reagent. The return tube is adapted to return reagent to the source.

Abstract: A swivel fitting used to connect to various components in a fluid handling system is provided. The swivel fitting incorporates an annular chamfer surface to reduce the affect that the fitting has on the flow properties of the fluid when the fluid is caused to flow through the fitting. The use of the swivel fitting in a paint supply line is also described.

Abstract: An injector for injecting a reagent into an exhaust stream includes an outer tube extending through an electromagnet and surrounding an inner tube. A first end of the inner tube is sealingly fixed to an inner surface of the outer tube. A guide member and an orifice plate are each sealingly fixed to the inner surface of the outer tube. A second end of the inner tube is aligned by the guide member. A moveable valve member includes a pintle head guided by the inner surface of the outer tube to align the valve member with an orifice extending through the orifice plate.

Abstract: In the ultrasonic atomization method, a liquid is ultrasonically oscillated in an atomization chamber 4 and a liquid column P is projected in carrier gas to thus atomize the liquid into mists, the carrier gas carrying the atomized mists outwardly of the atomization chamber 4; the carrier gas is forcibly sucked from a lateral point being away at a distance (d1) of 5 cm or less from a center axis m of the liquid column P and thereby a gas flow is blown across the liquid column P; the mists are separated away from the liquid column P by means of the blown gas flow; and such separated mists are transferred outwardly of the atomization chamber 4 by means of the carrier gas.

Abstract: An atomizer for atomizing liquids including a liquid storage receptacle pertaining to an atomizing device having an atomizing chamber that communicates with the ambient atmosphere through a plurality of outlet orifices. A vibrator is also provided, which liquid present in the atomizing chamber is caused to vibrate for the purpose of atomization, and an intake channel is provided, via which the liquid storage receptacle is connected to the atomizing device and a pumping device is also provided in the intake channel for the purpose of conveying the liquid from the liquid storage receptacle to the atomizing chamber, An electronic control device controls the pumping device and the vibrator.

Abstract: A building sprinkler system includes a pump having an input for receiving water and an output that is connected to selectively feed a plurality of sprinkler heads. A driver is operatively connected to the pump for driving the pump. A cooling arrangement is provided for cooling the pump during pump testing operations. The cooling arrangement includes: a heat exchanger with a primary loop formed by a flow path for delivering water from the output of the pump through the heat exchanger and back to the input of the pump, and a secondary loop formed by a flow path for delivering coolant from the heat exchanger through a radiator and back to the heat exchanger so that heat is transferred from the water to the coolant via the heat exchanger and from the coolant to air via the radiator.

Abstract: A device for generating a scented mist of an atomized liquid fragrance oil includes an atomizer complex, a reservoir assembly, a drainage tube, and a vacuum tube. The atomizer complex can atomize the liquid fragrance oil into a scented mist and deliver the scented mist to air outside of the atomizer complex, where the liquid fragrance oil the fragrance oil that is not atomized into the scented mist delivered to the air outside of the atomizer complex includes collected oil that is collected and drained to a reservoir assembly. A drainage tube extends from a bottom area of the atomizer complex into the liquid fragrance oil. The device can filter the liquid fragrance oil in the reservoir assembly and the collected oil from the atomizer complex that drained down the drainage tube. The vacuum tube can suction the filtered liquid fragrance oil and the collected oil into the atomizer complex for atomization.

Abstract: An air impingement nozzle that includes a fluid supply line with a fluid inlet and a fluid return line with a fluid outlet. A first wall in spaced walls extend between and are in communication with the fluid inlet and the fluid outlet to form a fluid channel. The first wall and second wall are curved such that an outer surface of the first and second wall form an air nozzle.

Abstract: The present invention relates to a circuit for dispensing windshield washer fluid for a motor vehicle. According to the invention, the dispensing circuit is characterized in that it includes a float (11) housed inside a chamber (12) of a stationary body (13) so as to occupy a top position enabling the flow of the windshield washer fluid toward the nozzles, and a bottom position in which the chamber (12) is inoperative, an in which the float blocks the flow of the windshield washer fluid to the tank (2). The invention can be used in the automotive field.

Abstract: The present disclosure generally relates to fluid spraying devices and systems and more specifically, but not by limitation, to a fluid intake assembly configured to be used with a remote fluid source to supply fluid material from the remote fluid source to a fluid sprayer. In one example, a fluid intake assembly for a fluid sprayer is provided. The assembly includes an inlet tube providing at least a portion of a fluid path between a remote fluid source and the fluid sprayer. The assembly also includes a fluid flow control mechanism configured to allow a flow of fluid material in the fluid path in a first direction and restrict a flow of fluid material in the fluid path in a second, opposite direction. In one example, the fluid flow control mechanism comprises a valve mechanism.

Abstract: A fuel injector for an engine is disclosed. The fuel injector may have a fuel nozzle with at least one injection orifice, and a needle element movable within the fuel nozzle between a first position at which the needle element inhibits fuel flow and a second position at which fuel flow is substantially uninhibited. The fuel injector may also have a control chamber located at a base end of the needle element, a body, and a control valve disposed within the body and movable to selectively drain the control chamber, thereby causing the needle element to move between the first and second positions. The fuel injector may further have an armature disposed within an armature cavity of the body and selectively energized to move the control valve, and a pressure reducer disposed within the body and configured to reduce a pressure of the armature cavity.

Abstract: An injector for injecting a reagent includes an axially translatable valve member positioned within a housing. An electromagnet is positioned within the housing and includes a coil of wire positioned proximate the valve member such that the valve member moves between a seated position and an unseated position relative to an orifice in response to energizing the electromagnet. A connector coupled to the housing includes an inlet tube concentrically aligned with and surrounding a return tube. The inlet tube is adapted to receive pressurized reagent from a source of reagent. The return tube is adapted to return reagent to the source.

Abstract: A pressure washer device is provided that employs an unloader bypass valve that directs a selective amount of fluid via a small diameter bypass line back to a water storage tank. The small amount of fluid allows for the pump to remain working and introduces cooler water into a bypass circuit, thereby allowing the thermal relief valve to be omitted. The diameter of the bypass line is of such a diameter to prevent siphonage of the detergent associated with the pressure washer system into the water storage tank as well.

Abstract: A method of operating a pressure compensated fuel injector includes: filling a fuel chamber with a charge of fuel by closing an injector valve and circulating a fuel from a fuel source through a plurality of recirculating valves and a cap valve; then isolating the fuel chamber and the charge of fuel from the fuel source; then equalizing a pressure within the fuel chamber to a rising pressure outside the fuel chamber by reducing a volume of the isolated fuel chamber; and then activating a solenoid that is coupled to the injector valve, opening the injector valve; and then further reducing the volume of the isolated fuel chamber to apply an over pressure within the chamber, pumping fuel from the fuel chamber through the injection orifice.

Abstract: A closed nebulizing system for removing bubbles includes a first pump, a nebulizing module and a second pump. The first pump is for providing a fluid. The nebulizing module includes an outlet channel, an inlet channel connected with the first pump, and a plurality of nozzles for nebulizing and ejecting part of the fluid. The second pump is connected with the outlet channel for outputting non-nebulized fluid. The first pump, the nebulizing module and the second pump form a closed fluid loop, so that the fluid continuously contacts with the plurality of nozzles and bubbles generated during nebulization process are evacuated from the nebulizing module.

Abstract: The present invention provides a low environmental burden type coating method using carbon dioxide and a coating device therefor that carry out carbon dioxide coating in which carbon dioxide is substituted for all or a portion of a diluent solvent (thinner) used in organic solvent-based spray coating, the coating method being configured to prevent deposition of a polymer of a paint component that has entered as a result of backflow by preliminarily adding, to carbon dioxide, a true solvent component of the paint in at least an amount required for saturated solubility (20% to 50% per weight of carbon dioxide) to lower the dissolving power of carbon dioxide with respect to the true solvent component. According to the present invention, it is possible to provide a coating method and a device therefor capable of considerably reducing VOC generation, and a coating method and a device therefor capable of performing stable carbon dioxide coating of a one-liquid curing type or two-liquid curing type paint.

Abstract: A device for generating a scented mist of an atomized liquid fragrance oil includes an atomizer complex, a reservoir assembly, a drainage tube, and a vacuum tube. The atomizer complex can atomize the liquid fragrance oil into a scented mist and deliver the scented mist to air outside of the atomizer complex, where the liquid fragrance oil the fragrance oil that is not atomized into the scented mist delivered to the air outside of the atomizer complex includes collected oil that is collected and drained to a reservoir assembly. A drainage tube extends from a bottom area of the atomizer complex into the liquid fragrance oil. The device can filter the liquid fragrance oil in the reservoir assembly and the collected oil from the atomizer complex that drained down the drainage tube. The vacuum tube can suction the filtered liquid fragrance oil and the collected oil into the atomizer complex for atomization.

Abstract: A vehicle and process for removing materials, such as paint, rubber, markings, or cure compounds, from a surface such as a road or airport runway. The vehicle comprises a fresh water tank, a water pressure pump, a blast head, a vacuum tank, a gray water tank, and a filter body.

Abstract: Droplet deposition apparatus including at least one droplet ejection unit having a plurality of fluid channels disposed side by side in a row, an actuator, and a plurality of nozzles, said actuator being actuable to eject a droplet of fluid from a fluid channel through a respective nozzle, a support member for said at least one droplet ejection unit, a first conduit extending along said row and to one side of both said support member and said at least one droplet ejection unit for conveying droplet fluid to each of the fluid channels of said at least one droplet ejection unit; and a second conduit extending along said row and to the other side of both said support member and said at least one droplet ejection unit for receiving droplet fluid from each of the fluid channels of said at least one droplet ejection unit.

Abstract: A method and apparatus is provided for starting and stopping a high pressure spray washer having a combustion engine driving a pump to provide high pressure fluid to a spray gun activated by a trigger. Pulling the trigger causes water to flow through the nozzle and pump and a sensor by the pump sends a flow start signal to a control module that activates an electric starter when an engine switch is turned on, thus starting the engine when it wasn't running. When the trigger is released flow to the pump stops and the sensor sends a flow stop signal to the control module. If a predetermined time passes before the sensor detects fluid flow to the pump as occurs when the trigger is pulled, then the engine is shut off. The time can be varied to adjust the time between releasing the trigger and shutting off the engine.

Abstract: In a method for injecting fuel into the combustion chamber of an internal combustion engine, the fuel is fed by at least one prefeed pump from a tank to at least one high-pressure pump and the high-pressure fuel fed by the high-pressure pump is supplied to the injector, wherein the injector has an injection nozzle with an axially movable nozzle needle protruding into a control chamber which can be fed with fuel under pressure and whose pressure is controlled by a control valve which opens or closes at least one inflow or outflow duct for fuel. Between the prefeed pump and the high-pressure pump, a partial volume of the fuel is branched off as a flushing volume and supplied to a flushing channel of the injector, wherein the flushing volume is directly supplied to the control valve such that the flushing volume flows at least partially through the control valve and preferably mixes with the fuel from the inflow or outflow duct, respectively.

Abstract: A fuel injector for a compression ignition internal combustion engine which comprises a fuel injection valve having an injection valve member which is moveable in use, under the influence of fuel pressure within an injection valve member control chamber acting upon it, between a closed position and an open position. The fuel injector further comprises a high pressure fuel supply passage to the injection valve member control chamber, and an actuator operable to open and close a discharge valve connected between the injection valve member control chamber and a fuel outlet passage to a low pressure reservoir or drain. A shut-off valve is provided in the high pressure fuel supply passage and the shut-off valve has a shut-off valve member which is moveable in use, under the influence of fuel pressure within a shut-off valve member control chamber acting upon it, between a closed position and an open position.

Abstract: A fuel injection device includes a cylinder that defines a pressure chamber at an end portion of a nozzle needle. A floating plate as a control member is placed in the cylinder. A cutout portion and multiple grooves are formed in the floating plate. The cutout portion and the grooves causes a gap between a large-diameter inner circumferential surface and an outer circumferential surface to communicate with the pressure chamber. The cutout portion and the grooves reduce a contact surface portion between the cylinder and the floating plate and divide the contact surface portion into multiple island portions. As a result, it is possible to reduce the contact surface portion.

Abstract: In a fuel injection device, a control body has a pressure control chamber, an inflow port and an outflow port. The inflow port and the outflow port are opened at an abutting surface exposed to the pressure control chamber. In the pressure control chamber is arranged a floating plate for pressing the abutting surface by a pressing surface with the pressure of the fuel to interrupt communication between the inflow port and the pressure control chamber. The abutting surface of the control body is provided with an outer opposite surface portion opposite to an outer edge of the pressing surface in a displacement axis direction of the floating plate, and the outer opposite surface portion has a special depressed portion that is depressed in the displacement axis direction and that extends along the shape of the outer edge of the pressing surface.

Abstract: A surface cleaning apparatus has a supply tank for holding a supply of cleaning solution, a spray tip in fluid communication with the supply tank for distributing the cleaning solution to the surface to be cleaned, and a spray tip receiver. A removable connection between the spray tip and spray tip receiver removably mounts the spray tip to the spray tip receiver.

Abstract: A painting system for painting a plurality of colours comprises a plurality of paint supply networks and a plurality of paint return networks, each network for a corresponding paint colour. A number of paint delivery stations are also provided, each including a plurality of drop lines. Each drop line is in communication with a corresponding paint supply network. Each drop line includes a downstream end coupling. Each paint delivery station includes a plurality of paint return nodes, each in communication with a corresponding paint return network. A paint gun unit is provided with a paint gun supply coupling. The paint gun supply coupling is complementary with each of the downstream end couplings of a corresponding drop line. The downstream end coupling of each drop line is uniquely shaped to engage only with the correct paint return node.

Abstract: In a second tank unit, a controller controls the on/off switching of a water supply solenoid valve so that water is stored in a sub tank within the level of Lu to Ll. At the same time, the controller controls the on/off switching of a pressurizing solenoid valve and a decompressing solenoid valve so that the air pressure in the upper space in the sub tank is maintained at a target value. As a result, regardless of the water level in the sub tank, the back pressure in the tank is maintained at the target value higher than atmospheric pressure. In this state, when a central controller turns on a water spouting solenoid valve, pressured water rapidly spouts from a nozzle. Moreover, a change in the target values of the back pressure promptly changes the height of the spouting water. Accordingly, water spouting can be promptly started/stopped, and the height or size of the spouting water can be readily and smoothly changed.

Abstract: Providing a fuel injection valve of the accumulator injection system, whereby the surge pressure caused by the change of the fuel injection rate when the nozzle needle begin to be seated on is reduced or lessened; the deterioration as to the fuel injection performance and the strength of the injection valve components the deterioration which is caused by the surge pressures is prevented. A fuel injection valve of the accumulator injection system, the fuel injection valve including: a nozzle 1, a nozzle needle 2, and a control rod 23; wherein, the control rod is provided with a groove whereby the groove communicates the high pressure fuel passage prior to a fuel injection shot; the groove is disconnected to the high pressure fuel passage and the fuel is injected into an engine combustion chamber during the fuel injection shot; the groove communicates with the high pressure fuel passage at the end of the injection shot.

Abstract: The invention relates to a ball valve for adjusting a flow of a fluid medium. The ball valve includes a valve seat and a rounded closing element, in particular a valve ball. Furthermore, the ball valve has an inlet with a choke valve and one diffuser arranged between the choke valve and the valve seat. The diffuser includes a constriction on the side facing the valve seat.

Abstract: In a fuel injection device, a pressure control valve is configured to make communication between an outflow port and a return channel and to interrupt the communication so as to control pressure of a fuel in a pressure control chamber, a valve member is configured to open and close a valve portion in response to the pressure of the fuel in the pressure control chamber, and a pressing member is arranged to be reciprocated and displaced in the pressure control chamber. The pressing member has an outer wall surface portion that is opposite to an inner wall surface portion of the control body to be capable of contacting the inner wall surface portion of the control body, and at least one of the outer wall surface portion of the pressing member and the inner wall surface portion of the control body is provided with a recess portion that is recessed to a side separated from the other one of the outer wall surface portion of the pressing member and the inner wall surface portion of the control body.

Abstract: A plural component mixing system includes an automatic balance feature to balance the pressure of two or more components as they are mixed. The pressures or flow rates of the two components are monitored. If there is a difference in pressure or flow rate greater than a specified amount, a bleed valve is opened for a short period of time to balance the flows. A computer with a touch screen is used to set the pressure and flow rate differences that trigger the bleed, and to set the time period for the bleed.

Abstract: A cooling system and method that significantly improves spray evaporative cooling by using arrays of slot or plane sprays to create coverage of the entire heated surface to be cooled without allowing interaction between plumes that are spraying from the nozzles. The sprays are directed at an angle to the surface to take advantage of the high droplet momentum possessed by the spray to direct a flow of coolant fluid across the surface toward desired draining points, thereby enabling drainage regardless of the orientation of the unit.

Abstract: A solid stream nozzle providing an extend throw-distance achieved by reducing boundary layer effects within the nozzle bore and/or by accelerating peripheral regions of the ejected stream in order to help maintain cohesion of a free liquid stream without appreciable dispersion. The method includes generating a high-pressure fluid source, supplying the nozzle with high pressure; reducing boundary layer effect within the nozzle bore, and optionally, accelerating and/or inwardly re-directing the peripheral boundary of the ejected stream with a secondary higher pressure, higher speed fluid source. The apparatus includes a high pressure fluid source, a nozzle bore, a bleed ring within the nozzle bore to strip off a boundary layer, and optionally, a secondary higher pressure fluid source at the nozzle tip to accelerate and/or inwardly re-direct the ejected fluid stream.

Abstract: A fuel injection device has therein a recovery channel provided in a first valve body, and a fuel channel provided in the first valve body and a second valve body. The fuel channel is opened by openings at a first end surface of the first valve body and a second end surface of the second valve body. One of the first end surface and the second end surface is provided with an end surface groove connected to the recovery channel. In the fuel injection device, the end surface groove is provided to enclose at least a part of the opening and is separated from the opening by a clearance, and one of the first valve body and the second valve body has a side surface groove extending in a circumferential direction at an outer periphery of the one of the first valve body and the second valve body.

Abstract: A pressure swirl atomizer includes a nozzle having an exit orifice and a plurality of tangential swirl channels and a pintle that is movable within a pintle bearing between a closed position that closes the exit orifice and an open position that opens the exit orifice. The atomizer also has a pole piece having a channel, and the pole piece and the pintle are separated by an air gap when the pintle is in the closed position. A space between the pintle and the pintle bearing, the air gap, and the channel together form at least a part of a return path. Fluid from the tangential swirl channels drains through the return path when the pintle is in the closed position. To open the atomizer, a solenoid generates a magnetic force when energized, attracting the pintle toward the pole piece into the open position. A check valve disposed in the return path generates a fluid back pressure when the solenoid is de-energized to push the pintle toward the closed position.

Abstract: An inflow opening of an inflow path opens to a space in a tank. An outflow opening of an outflow path opens to the space in the tank. The inflow opening and the outflow opening are vertically above a maximum level of the moisturizing liquid allowed to be stored in the tank.

Abstract: A component includes a transmission arrangement for transmitting a force between an actuator and a control valve. The transmission arrangement includes a post that is associated with the actuator. The control valve is displaceable to an open position from a closed position when an opening force is applied to the control valve that is greater than a closing force provided to the control valve. The transmission arrangement is disposed in the component between the post and the control valve actuator and arranged to mechanically transmit by physical contact an actuator force from the post to the control valve when the post begins to travel towards the extended stroke position, and hydraulically amplify the actuator stroke between the post and the control valve when the post travels from the retracted stroke position to the extended stroke position.

Abstract: An electrical module for use within a fuel injector for delivering fuel to an internal combustion engine is described. The electrical module has a variable length. The electrical module comprises electrical contacts for operatively connecting the electrical module to a power plug of a fuel injector. The electrical module also comprises an actuator for operatively controlling a control valve disposed within the fuel injector. The electrical module also comprises electrical conductors arranged within a protective housing. These electrical conductors provide an electrical connection between the electrical contacts and the actuator in order to provide electrical power to the actuator when the electrical contacts are operatively connected to the power plug of the fuel injector. The body of the electrical module is comprised of a compressible elastic element, such that the length of the module is variable by compressing the elastic element. Injectors including such electrical modules are also described.

Abstract: A pressure washer device is provided that employs an unloader bypass valve that directs a selective amount of fluid via a small diameter bypass line back to a water storage tank. The small amount of fluid allows for the pump to remain working and introduces cooler water into a bypass circuit, thereby allowing the thermal relief valve to be omitted. The diameter of the bypass line is of such a diameter to prevent siphonage of the detergent associated with the pressure washer system into the water storage tank as well.

Abstract: A spraying apparatus that is particularly suited to spraying of suspensions, for example liquid suspended fertilizers. The apparatus includes a tank with an inlet configured to create fluid circulation within the tank, thereby reducing settling of solids out of suspension. A mixing unit improves the mixing of particulates with fluids as they are added to the tank. Spray outlets are arranged in a flow loop and only a proportion of fluid passing through the flow loop is sprayed with the remaining fluid returning to the tank for recirculation. Pressure-actuated closures may be used to prevent spraying until pressure has built up sufficiently.

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 ultrasonic waterjet apparatus (10) has a mobile generator module (20) and a high-pressure water hose (40) for delivering high-pressure water from the mobile generator module (20) to a hand-held gun (50) with a trigger and an ultrasonic nozzle (60). An ultrasonic generator in the mobile generator module (20) transmits high-frequency electrical pulses to a piezoelectric or magnetostrictive transducer (62) which vibrates to modulate a high-pressure waterjet flowing through the nozzle (60). The waterjet exiting the ultrasonic nozzle (60) is pulsed into mini slugs of water, each of which imparts a waterhammer pressure on a target surface. The ultrasonic waterjet apparatus (10) may be used to cut and de-burr materials, to clean and de-coat surfaces, and to break rocks.