Showing papers on "Nozzle published in 1988"

Modeling Engine Spray/Wall Impingement

Abstract: A computer model was used to study the impingement of sprays on walls. The spray model accounts for the effects of drop breakup, drop collision and coalescence, and the effect of drops on the gas turbulence. A new submodel was developed to describe the spray/wall interaction process. Predictions of the effect of engine swirl, ambient gas pressure (density), wall inclination angle and the distance from the nozzle to the wall, were in good qualitative agreement with the experiments

Support for slice-shaped articles and device for etching silicon wafers with such a support

Abstract: A device is disclosed for etching silicon wafers, with a support (1) for the silicon wafers, an annular nozzle (8) being provided in the surface (9, 10) of this support that faces the silicon wafer (11), the nozzle being chargeable with compressed gas for the formation of a gas cushion between the support (1) and the silicon wafer (11), the gas exiting between the wafer (11) and the support (1) preventing passage of treatment fluid onto the underside of the wafer (11). The support (1) is located within the interior (21) of an annular tank (20) wherein at least two annular ducts (25, 26, 27) are provided which are open toward the interior (21) of this tank. Furthermore, means are included for lifting and for lowering the support (1) with respect to the tank (20) and for setting the support (1) into rotation about its axis (14) which latter is congruent with the central axis of the tank (20).

Multi-chamber ink jet recording head for color use

Abstract: A multichamber ink jet pen has a printhead comprising a plurality of nozzle groups corresponding in number to the number of chambers. The nozzle groups are respectively in communication with the individual chambers for receiving ink. The multi-color ink jet pen is retrofittable in a single color printer to provide multicolor printing capability. The nozzles in the nozzle groups are formatted to correspond to the nozzle format in the printhead of the single color ink jet pen, including the same nozzle spacing, to take advantage of the single color printer control for that nozzle format. The nozzle groups each duplicate a different longitudinal segment of the single color nozzle column pattern. The nozzle groups are staggered in the scan direction and the end nozzles in the respective groups have the same longitudinal spacing therebetween as the nozzles in the nozzle columns to duplicate the nozzle spacing of the single color nozzle column pattern within and between the nozzle groups of the multi-color recording head.

Oral hygiene device

Abstract: The oral hygiene device comprises a nozzle-holder connectable to a liquid source and a nozzle (1) removably attached to the nozzle-holder, the nozzle being intended for spraying either a multi-jet of liquid via a first duct or a single jet of liquid via a second duct. A two-way valve (5) makes it possible to direct the liquid towards one duct or the other and therefore the branching of the two liquid ducts are located in the nozzle itself. There is a restoring spring (27) which is such that the stable position of the device is for multi-jet spraying, while under the action of an external force exerted on the control member (6) of the valve the device assumes the single-jet position.

Gas blast switch

Abstract: The gas-blast circuit-breaker has a moving (1) and a fixed switchpiece (2), each having at least one erosion contact (6, 7), and, mounted on the moving switchpiece (1), a pressure chamber (10) which stores extinguishing gas which is compressed by the arc during the switching-off process, and whose volume is independent of the switch movement, and an insulating nozzle (8) which is arranged coaxially with respect to the two switchpieces (1, 2) In this circuit breaker, it is intended significantly to increase the separating speed of the erosion contacts (6, 7) with respect to the drive speed without noticeably increasing its drive energy and without modifying its extinguishing geometry This is achieved by the erosion contact (7) of the fixed switchpiece (2) being guided in the axial direction in a moving manner in a sliding contact (14) and being part of a converter element arranged downstream of the nozzle constriction (9) of the insulating nozzle (8) and operated by the moving switchpiece (7) During the switching-off process, this converter element transmits the movement of the moving switchpiece (1) in the opposite sense onto the erosion contact (7) of the fixed switchpiece (2)

Floor nozzle for vacuum cleaner

Abstract: The present invention relates to a floor nozzle for use with a vacuum cleaner. The nozzle of the present invention has a sub agitator provided outside an end wall of a main body of the nozzle. The sub agitator is covered with a protecting cover, thereby assuring user safety. A stirring member, a dust outlet and confirmation holes of the sub agitator make it easier and smoother to discharge the dust to the outside, while preventing a burning or a breaking of the agitator.

Manufacture of nozzles for ink jet printers

Abstract: A method of manufacturing one or more nozzles for an ink jet printhead initially comprises bonding a nozzle plate to the ink ejection end of the printhead. A mask is then secured in contact with the nozzle plate, the mask having a plurality of apertures each defining a respective nozzle exit. Laser radiation applied to the mask exposes the areas defined by the apertures to ablate the plate material between the nozzle exits on the external surface of the plate and corresponding nozzle inlets on the opposite surface of the plate. The assembly comprising the printhead, plate and mask is rocked during the exposure step to increase the area of the nozzle inlet relative to its outlet. Also, prior to the nozzle formation step, one or more ink troughs may be provided for supplying an external source of ink for each nozzle. The ink troughs, which may be formed using laser ablation techniques similar to those used in the formation of the nozzles, facilitate a continuous, positive flow of ink through the nozzles.

Fleet data monitoring system

Abstract: A fuel management system for use in the operation of a fleet of commercial vehicles, comprising a fuel supply means comprising a fuel pump connected to a fuel dispensing nozzle by way of a flexible fuel delivery hose. A fuel management system is coupled to the fuel pump for controlling the amount of fuel dispensed via the nozzle. One end of a fibre optic is carried by the pump nozzle for receiving information from a radiation transmitter on any of said commercial vehicles when the pump nozzle is inserted into the fuel entry port of that vehicle, the other end of the fibre optic being positioned to supply the information to the fuel management system. The fibre optic is run from the top of the nozzle, through a special fitting into the interior of the hose, the fibre optic then running the length of the delivery hose, surrounded by the fuel product, until it reaches the region of the fuel pump, where it emerges from the hose via a gland and runs on to the fuel management system.

Foil-wound transformer

Abstract: PURPOSE: To obtain a highly reliable foil-wound transformer without insulation problem by arranging a magnetic shield comprising copper or aluminum and a cooling panel at the outermost part of a winding. CONSTITUTION: Metal sheets 2 and an insulating sheet 3 are overlapped around an insulating tube 16, and winding 5 is formed. An electric-field relaxing shield 15 comprising nonmagnetic steel, a magnetic shield 18 comprising copper or aluminum and a cooling panel 6 are attached to the outside part of the winding 5. Therefore, leaking magnetic flux is repelled with the magnetic shield 18, and the loss at the end part of the winding is decreased. Therefore, the cooling panel 6 for the winding 5 can be arranged at a position separated from the outside of the winding 5. An insulating distance D between a liquid guiding nozzle 17 directed to the cooling panel 6 and the electric field relaxing shield 15 can be sufficiently secured. In this constitution, the loss at the winding is decreased, the cooling panel can be arranged at the position separated from the outer diameter of the winding and the highly reliable foil-wound transformer from the standpoint of insulation can be obtained. COPYRIGHT: (C)1990,JPO&Japio

Apparatus and process for producing high density thermal spray coatings

Abstract: An attachment for supersonic thermal spray equipment by which inert shield gas is directed radially outwardly about the central core of a supersonic, particle-carrying flame to isolate the same from ambient atmosphere. The shield gas is injected tangentially against the inner surface of a constraining tube attached to and extending from the discharge end of the thermal spray gun nozzle, causing the shield gas to assume a helical flow path which persists until after it exits the tube and impacts the work piece. A process using the shielding apparatus with a high-velocity, thermal spray gun and employing oxygen and hydrogen as gases of combustion and inert gas to introduce metal powder, having a narrow particle size distribution and low oxygen content, into the high-velocity combustion gases, produces significantly improved, high-density, low-oxide metal coatings on a substrate.

Influence of Various Parameters on the Response Factors of the Evaporative Light Scattering Detector for a Number of Non-Volatile Compounds

Abstract: We have investigated the influence of the most important operation parameters of the evaporative light scattering detector (ELSD) on its response factors. When the detector is operated under proper experimental conditions, the repeatability of the response factor is around 1%. The response factors and the signal to noise ratio are maximum for a certain flow rate of scavenger gas, which depends much on the exact dimensions of the nebulizer. The temperature of the drift tube has no effect, as long as the vapor pressure of the solvent is larger than ca 200 torrs. The nature of the mobile phase has some effect, related to the surface tension and viscosity of the solvent used. The most important factor, however, is the nebulizer itself. Replacing the nebulizer by another one, made with the same tubes, or changing slightly the position of the liquid nozzle in the gas nozzle may change markedly the response as well as its relationship with sample size. The peak area increases exponentially with increasi...

Apparatus for semiconductor vapor growth

Abstract: PURPOSE: To enhance gas substitution efficiency by installing the following: a discharge port, of a gas for reaction use, to be installed in the center of a reaction chamber; a discharge port of a gas for purge use at the upper part of the reaction chamber. CONSTITUTION: A bell jar 1 is opened; a wafer 4 is placed on a diskshaped susceptor 3; the bell jar 1 is closed; N 2 gas is supplied from a nozzle 5 and a hole 8 of an inner bell jar 7. Then, H 2 gas is supplied to the inside of a reaction chamber from the nozzle 5 and the hole 8 of the inner bell jar 7; the N2 gas is evacuated. A flow rate of the H 2 gas supplied from the hole 8 of the inner bell jar 7 is reduced; this gas is balanced with an atmosphere inside the reaction chamber; it is prevented that a reaction gas does not enter a part between the inner bell jar 7 and the bell jar 1; the H 2 gas is supplied only from the nozzle 5; a high-frequency induction heating operation is started; a temperature of the disk-shaped susceptor 3 is raised to a prescribed temperature. Then, the reaction gas is mixed with the H 2 gas; this mixed gas is supplied to the inside of the reaction chamber from the nozzle 5 in order to cause a vapor reaction. Then, the reaction gas is stopped; only the H 2 gas is supplied to the inside of the reaction chamber from the nozzle 5; the high-frequency induction heating operation is stopped; a cooling operation is executed. The N 2 gas is supplied to the inside of the reaction chamber from the nozzle 5 and the hole 8 of the inner bell jar 7; the H 2 gas is evacuated; after that, the bell jar 1 is opened; the wafer 4 is taken out. Thereby, it is possible to shorten the gas substitution time. COPYRIGHT: (C)1990,JPO&Japio

Device for scaling at the gum pocket

Abstract: A device for scaling sordes and tartars on the surface of teeth at the gum pocket having improved construction, in which there are provided a hand-piece for an ejection nozzle; a compressor for feeding pressurized air to the ejection nozzle at one end of the hand-piece; a conduit pipe for transporting the compressed air; a water sump; and a conduit for leading water from the water sump to the ejection nozzle, the compressed air being ejected from the ejecting nozzle of the hand-piece under a pressure of from 1 to 2 kg/cm 2 and in an ejecting quantity of from 6 to 9 l /min., and water being ejected together with the pressurized jet air in an ejecting quantity of from 10 to 30 cc/min. in the form of a spray jet.

Electromagnetic fuel injection valve

Abstract: An electromagnetically operable fuel injection valve for use with an internal combustion engine. The injection valve includes a non-magnetic housing having a fuel passage therethrough and a fixed magnetic core therein. A magnetic movable armature is floatably movable within a sleeve member within the housing. The movable armature has a nozzle portion of reduced diameter which carries at the exit end thereof a ball valve. A nozzle seat having a fuel discharge orifice is adapted for reception of the ball valve and means are provided for guiding said ball valve into sealing engagement with the discharge orifice.

Computerized beer dispensing system

Abstract: A computerized beverage dispensing system in a first embodiment includes a fitting connected to a tap having a thermoelectric heat pump cooled nozzle and an electrically controlled valve, hereinafter valve. A computerized controller is connected to the fitting and tap. The fitting has a constricted passage through which the beverage flows under pressure and pressure and temperature transducers for measuring the pressure difference across the constricted passage and the temperature thereof. The computerized controller includes a pressure to time look up table used for timing valve operation. If abnormal pressure or temperature occurs the valve is cut off unless an override circuit is activated. A front/back display shows messages programmed into the computerized controller. A modified fitting has a Pitot tube measuring the velocity flow for the pressure transducer for use with a velocity/time look up table for timing valve on time. In a second embodiment a counter initially counts the time to dispense a volume of the beverage; adjustment for volume changes is made thereafter by incrementing the time up or down as necessary to dispense the initial volume of the beverage. A third embodiment uses the count and adjust technique for beverage dispensing volume control, together with system entry being controlled by a code entry matching a stored code. After entry a normal/program (purge) key switch at normal controls the normal system operation and at program/purge secures the system from all but the key carrier for programming and/or purging.

Fuel injection pump for internal combustion engines

Abstract: A fuel injection pump for internal combustion engines has at least one pump working area (2) delimited by a pump plunger (1) and a work cylinder (3) and at least one high-pressure line (4) leading from the pump working area (2) to a fuel injection nozzle (5). In a discharge line (6) branching out from the high-pressure area (2, 4) is arranged a pressure-keeping value (7) the keeping pressure of which is tuned with the opening pressure of the injector nozzle (5). Thus, thanks to a reduction of the duration of the injection, one obtains a silent operation with low speed and low charge without undesirably affecting the injection start, as well as a soft opening of the nozzle (5). Other driving elements (9, 11, 12, 15) may be arranged in the discharge channel to influence the outflow volume and the opening features of the injection valve (5).

Apparatus for dispensing fluid materials

Abstract: Apparatus and method for dispensing fluid material whereby the fluid is discharged from a nozzle onto a workpiece. Delivery of fluid to the nozzle is controlled by a metering valve located in close proximity to the nozzle. The flow of dispensed fluid is sensed by a pressure transducer disposed to sense the pressure drop across the nozzle. The pressure transducer generates a feedback signal which can be applied by way of a closed loop control system to an electropneumatic servovalve which operates a double-acting air cylinder the pressure drop across the nozzle thereby controlling the flow of dispensed fluid in accordance with a driving signal. Where the dispenser is carried by a robot, the driving signal can be correlated to the relative speed between the workpiece and the nozzle to accurately control the amount of fluid per unit length contained in a bead deposited on the surface of the workpiece. Due to the rapid response of the system such precise control is possible even during relatively rapid changes in the relative speed between the nozzle and the workpiece. Also disclosed are means for insuring that the volume of fluid dispensed over a predetermined interval corresponds to a desired setpoint thereby correcting for changes in the intrinsic viscosity of the dispensed fluid as may be caused by changes in its temperature.

Ultrasonic atomizer and storage bottle and nozzle therefor

Abstract: This ultrasonic atomizer includes an oscillating member, a means for vibrating the oscillating member at a supersonic frequency, a bottle for liquid storage, with an opening, fitted generally above the oscillating member with regard to the preferred orientation of the atomizer during use, and a nozzle fitted into the opening of the bottle, this nozzle having a tip portion protruding outside the bottle in the generally downwards direction and approached closely to the oscillating member. The nozzle is formed with a fine groove for leading liquid in the bottle downwards to the tip portion of the nozzle by capillary action and by gravitational action, and with an aperture for introducing air from the outside into the bottle. Thereby liquid in the bottle may be properly supplied to the oscillating member to be atomized in a controlled fashion, and interruption of liquid supply and also dribbling of liquid are positively prevented. Constructions for the nozzle and for the bottle are also disclosed.

Hand-held pneumatic power assisted syringe

Abstract: A hand-held manually operable-pneumatic power assisted syringe serves for injection of fluids. The syringe includes a barrel-shaped housing having a piston slidably mounted therein between the distal and proximal ends of the housing and dividing the housing into a fluid chamber at the distal end and a gas chamber at the proximal end. A nozzle is mounted on the distal end of the housing and is provided with a discharge passageway for discharging fluid from the fluid chamber as the piston is displaced toward the distal end. A piston push rod extends from the piston and is slidable through an end cap mounted on the proximal end of the housing with the push rod serving to displace the piston in the distal direction. The push rod is hollow and has a first passageway at a location adjacent the piston for communication with the gas chamber and a second passageway at a location exterior of the housing for communication with a source of pressurized gas to thereby fill the gas chamber with pressurized gas. A valve assembly is carried by the push rod and includes a bobbin slidably mounted within the push rod between a normal valve closed position for blocking the second passageway to a valve open position for permitting gas to flow through the second passageway into the push rod and then to the gas chamber.

Nozzle for plasma torch and method for introducing powder into the plasma plume of a plasma torch

Abstract: Apparatus and method are disclosed for introducing powder into a stream of plasma generated in a plasma torch such as a plasma transferred arc torch The nozzle of the torch has a central base through which the stream of plasma flows, the bore being conically flared immediately adjacent the exit end of the nozzle Powder is fed through feed bores in the nozzle to the conically flared portion of the central bore and is directed in the form of streams of powder toward the plasma streams at angles to the longitudinal axis of the central bore of between about 45° and about 50°, preferably 50°, with a velocity component in the direction of travel of the plasma stream The streams of powder are fed sufficiently close to the plasma stream as to avoid spreading of the streams of powder before they reach the plasma stream, but not so close to the plasma stream as would cause plugging of the feed bores in the nozzle

Tri-injection of hollow articles

Abstract: Method for tri-injecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic materials having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source at least to the injection nozzle. At least two of the nozzle channels are insulated to prevent heat transfer and to maintain the temperature of the thermoplastic materials.

Numerical study of gas-particle flow in a solid rocket nozzle

Abstract: The numerical solution procedure has been developed to analyze gas-particle flow in a solid rocket nozzle. The time-dependent) explicit MacCormack scheme is adopted to solve the governing equations derived from the trajectory model. The velocity, trajectory, and temperature of the solid particles are treated with the Lagrangian approach. To study the particle diffusive velocity, which is included to account for the turbulent effect, the equation of particle number density is solved by the hybrid scheme. The results of this study indicate the level of gas-particle coupling and the differences that can be expected for the different sizes and mass fractions of particles.

Experimental Study of Cross-Flow Turbine

Abstract: The performance of the cross‐flow turbine, CFT, also known as the Banki turbine, was studied experimentally by varying the number of blades, the runner diameter, and the nozzle entry arc under flow/head variations. The results, as presented in this paper, show that the maximum efficiency of the CFT at any flow/head combination increases as the nozzle entry arc increases or the aspect ratio of the runner decreases. Equations have been suggested to obtain the optimum number of blades for maximum efficiency of the turbine and to find the specific speed of the CFT as a function of unit discharge and nozzle entry arc.

Nozzle method and apparatus

Abstract: A nozzle apparatus and method for electrically charging and dispensing fluids and other flowable materials, comprising a fluid reservoir and a housing. The housing includes walls which define a chamber having an elongated slot at the tip thereof. The slot is resiliently compressible. The reservoir communicates with the chamber such that the fluid is introduced into the chamber at a controlled rate and a low hydrostatic pressure. A shim is placed within the chamber slot partially occluding fluid flow through the slot. The shim and the amount of compression of the slot defines with precision the size and shape of the slot. The shim and fluid are electrically connected to a high voltage source through the housing. The fluid forms a meniscus about the housing slot whereby upon actuation of the high voltage source, the fluid is dispensed as one or more charged fluid paths or a plurality of charged droplets.

Whirl nozzle for atomizing a liquid

Abstract: A whirl nozzle for atomizing a liquid has a whirl chamber rising above a whirl chamber bottom and tapering toward a nozzle outlet orifice opposite the bottom, at least one whirl channel laterally offset to a central axis of the whirl chamber and opening into the latter, and a whirl parameter of greater than 1, so as to permit an increase in the whirl input pulse at constant or reduced whirl losses. A displacement element rises above the whirl chamber bottom to prevent the formation of an air core in the region of the floor. The element is arranged concentrically about the central axis and the external diameter of the section nearer the floor is equal to at least one diameter of the nozzle outlet orifice. In one embodiment, the conical seating surface has a smaller apex angle than a section of the whirl chamber wall adjoining the nozzle outlet orifice. In another embodiment, the displacement element is provided with at least one eccentrically arranged reflux bore.

Pulsating hot and cold shower head

Abstract: The shower head dispensing device simultaneously dispenses a plurality of separate liquids in pulsating simultaneous streams. The liquid streams are maintained separate within the device by the use of separate distribution chambers, channels and nozzle sections. A free-turning, tiered rotor is provided within the device. The rotor turns on frictionless bearings provided by hydraulic balancing of the liquid pressures around the rotor. The liquid flow is maintained separate within the device and rotor and provides pulsating liquid flow through the tiers of the rotor and out through outlet openings provided in the device. Angularly adjustable nozzles are proivided within the nozzle sections and adjacent to each tier of the rotor so that the pressurized liquids flowing through the nozzles will impinge upon the outer perimeter of the rotor causing the rotor to rotate as the desired speeds. The speed of the rotor determines the time differential between the pulses present in each of the simultaneously dispensed liquids.

Method of applying a coating of viscous materials

Abstract: In the coating method of a viscous material according to the present invention, a nozzle body having outlets corresponding to many coating rows is employed. The nozzle body is moved, while the gap between the nozzle body and the surface to be coated is maintained constant, so that the viscous material composed of different kinds of materials is discharged out of each outlet, thereby to effect simultaneous coating of the viscous material composed of different kinds of materials in many rows. Therefore, the present invention has such advantages that the surface to be coated is less stained, and at the same time, the surface to be coated becomes more smooth.

Combustor for gas turbine

Abstract: A gas turbine combustor (10) for a gas turbine plant comprises an outer casing (20) and a combustor liner (14) disposed in the outer casing, the interior of the combustor liner constituting a combustor chamber divided into a first stage (A) of combustion area and a second stage (B) of combustion area, disposed downstream the first stage combustion area The gas turbine combustor further comprises a nozzle member (23) for supplying a first stage fuel into the first stage combustion area (A), a header (25) for supplying a second stage fuel into the second stage combustion area (B), and a header (24) for further supplying water or water vapour into the first stage combustion area (A) The nozzle member and both the headers are disposed to an end plate (20a) closing one end of the outer casing in a concentrical fashion The flow rates of the first and second stage fuels and the water vapour are controlled by a control unit equipped with the gas turbine combustor

Nozzle for inflatable objects

Abstract: A nozzle for inflatable objects being made of a plastic material, including a nozzle seat which is subject to engage with the inflatable object in such a manner that it is normally retracted in the inflatable object but also being extendable from the surface of the inflatable object when being pulled out; and annular wall extended from the nozzle seat which defines an air inlet; a plug for insertion into the air inlet; a plug arm extended from the annular wall and connecting the plug with the nozzle seat; a plug extension extended from the plug at a position remote from the plug arm and having two holes; a tie at a side of the air inlet opposite the plug arm being passable through the two holes on the plug extension; and a piece of one-way membrane extended from a lower face of the nozzle seat which during inflation allows air to blow in through the air inlet but which blocks air from flowing out of the air inlet when the nozzle seat is protruded from the surface of the inflatable object.