US20070075161A1 - Droplet Ejector With Oscillating Tapered Aperture - Google Patents
Droplet Ejector With Oscillating Tapered Aperture Download PDFInfo
- Publication number
- US20070075161A1 US20070075161A1 US11/532,602 US53260206A US2007075161A1 US 20070075161 A1 US20070075161 A1 US 20070075161A1 US 53260206 A US53260206 A US 53260206A US 2007075161 A1 US2007075161 A1 US 2007075161A1
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- Prior art keywords
- fluid
- aperture
- opening
- apertures
- liquid
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/005—Sprayers or atomisers specially adapted for therapeutic purposes using ultrasonics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/006—Sprayers or atomisers specially adapted for therapeutic purposes operated by applying mechanical pressure to the liquid to be sprayed or atomised
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M15/00—Inhalators
- A61M15/02—Inhalators with activated or ionised fluids, e.g. electrohydrodynamic [EHD] or electrostatic devices; Ozone-inhalators with radioactive tagged particles
- A61M15/025—Bubble jet droplet ejection devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
- B05B17/0646—Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0653—Details
- B05B17/0669—Excitation frequencies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0653—Details
- B05B17/0676—Feeding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0653—Details
- B05B17/0676—Feeding means
- B05B17/0684—Wicks or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
- B41J2/025—Ink jet characterised by the jet generation process generating a continuous ink jet by vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3306—Optical measuring means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/15—Moving nozzle or nozzle plate
Definitions
- the present invention relates to the fields of liquid spray and atomization of liquids of all kinds and, more specifically, finds utility in humidification and misting, industrial cleaning, surface coating and treatment, particle coating and encapsulating, fuel atomization, and medical spray applications.
- the first type atomizes liquid that forms a thin layer on an ultrasonically-excited plate.
- the first type is not capable of ejecting atomized fluid droplets.
- U.S. Pat. No. 3,738,574 describes an atomizer of this type.
- the second type utilizes a housing defining an enclosed chamber.
- the housing includes a perforated membrane or a pinhole membrane as the front wall of the chamber.
- the apparatus further includes a means to vibrate the membrane or a side wall of the chamber, typically by a piezoelectric element affixed to the front face of the chamber.
- the piezoelectric element oscillates the fluid in the chamber.
- pressure waves are generated in the chamber, forcing fluid through the open pinholes.
- All the devices of the second type require fluid to be kept inside the chamber next to the discharge opening.
- volatile fluids When volatile fluids are used, problems arise. The volatile fluids escape through the discharge opening. The discharge opening will clog, restricting or stopping further discharge. These problems are prevalent with volatile fluids such as fuel, paint, or other coating materials.
- U.S. Pat. No. 4,632,311 utilizes a chamber with a suction pump in communication with the chamber.
- the pump is energized after operation to drain the liquid from the chamber, leaving it dry during nonworking periods. This is supposed to prevent otherwise solid substances from clogging the nozzle opening.
- U.S. Pat. No. 4,533,082 uses a vacuum pump to ensure that the liquid in the chamber is kept under negative pressure during nonuse. In these devices it is particularly difficult to feed fluid into the chamber without causing the fluid to uncontrollably flow out of the discharge opening.
- the present invention provides an ejection device that includes a free oscillating surface having microscopic tapered apertures of a selected conical cross-sectional shape.
- the apertures draw fluid into their large openings and eject the fluid from their small openings to a great distance.
- the ejection action is developed by the aperture, regardless of the amount of fluid in contact with the oscillating surface, and without any fluid pressure. Both sides of the oscillating surface are operating under the same ambient pressure. Therefore, the ejection device can operate equally well in vacuum or high-pressure environments.
- When only a thin film of fluid is allowed to adhere, in surface tension contact, to the large opening of an aperture, the supplied liquid continuously adheres to the large opening by surface tension.
- the film of fluid oscillates with the surface while it is being drawn into the large opening of the aperture and ejected forwardly. This continues until all the fluid is drawn from the surface, leaving the surface dry and free of liquid during the Lime that the device is not in use.
- the cross-section of the aperture is chosen with respect to the fluid to be ejected, the oscillation required to produce ejection is kept small, and the film of fluid on the oscillating surface appears to be dynamically at rest during ejection.
- the device can operate under any pressure conditions.
- FIG. 1 is a schematic illustration of a preferred embodiment of a device according to the present invention.
- FIG. 2 is the schematic illustration of the present invention of FIG. 1 shown in its oscillating configuration
- FIG. 3 is a top view of a vibrating surface according to the present invention.
- FIG. 4 is a bottom view of a vibrating surface according to the present invention.
- FIG. 5 is an enlarged cross-sectional view of the center area of the membrane shown in FIG. 2 and labelled “ 5 ”;
- FIG. 6 is an enlarged elevational view of the center area of the vibrating surface of the present invention showing a preferred aperture shape
- FIG. 7 is a schematic illustration of the fluid characteristic within a tapered aperture during half of an oscillation cycle
- FIG. 8 is a schematic illustration of the fluid characteristic with a tapered aperture during half of an oscillation cycle
- FIG. 9 is a side view of an alternate preferred embodiment of the fluid ejection device according to the present invention.
- FIG. 10 is a front view of the fluid ejection device of FIG. 9 ;
- FIG. 11 is an enlarged cross-sectional side view of the free end of the fluid ejection device of FIG. 9 ;
- FIG. 12 illustrates the ejector of FIG. 9 provided with a fluid supply system
- FIG. 13 illustrates an alternative apparatus for preventing accidental overflow in the fluid supply system of FIG. 12 ;
- FIG. 14 illustrates the ejector of FIG. 9 provided with an alternative fluid supply system
- FIG. 15 is an enlarged cross-sectional side view of the fluid supply tube of FIG. 14 including a discharge nozzle attached at a side wall of the supply tube;
- FIG. 16 is an enlarged cross-sectional side view of the discharge nozzle of FIG. 14 ;
- FIG. 17 is a side view of another alternative preferred embodiment of the fluid ejection device according to the present invention.
- FIG. 18 is a front view of the fluid ejection device of FIG. 17 .
- the present invention provides a new fluid ejection device that is especially advantageous in applications that require ejection of fluid droplets without fluid pressure and without a propellant and in ambient pressure environments.
- the ejector is capable of ejecting viscose liquid such as paint and coating materials without the use of compressed air.
- the use of air as a propellant in paint spray application causes overspray, in that part of the paint droplets escape to the atmosphere and cause air pollution.
- the transfer efficiency that is, the percentage amount of coating material, such as paint, that reaches the target, is significantly increased when ejection is without air.
- VOCs volatile organic chemicals
- the present invention provides a device that ejects fluid from microscopic tapered apertures.
- the fluid is transported to the ejecting surface at the large opening of the tapered aperture.
- a cohesive attraction force surface tension exclusively causes the liquid to adhere to the tapered aperture.
- the solid/fluid interaction of the fluid with the tapered aperture wall causes fluid to be drawn into the large opening of the aperture and ejected from its small opening. This ejection action is attributed to the geometry of the aperture, as well as the fluid characteristics such as viscosity, density, and elasticity.
- the fluid supply to the surface is tightly controlled to prevent overflow of liquid from the supply side of the oscillating surface.
- a flow control valve or a two-way valve is provided to control the amount of fluid that is transported to the surface.
- the valve may have a built-in electrical contact that activates oscillation simultaneously with the flow of fluid.
- fluid is supplied to the oscillating surface from a discharge nozzle that is in close proximity to the oscillating surface.
- the fluid is held by surface tension forces in the small gap between the front face of the fluid supply nozzle and the oscillating surface.
- the surface with the tapered apertures is allowed to oscillate for a period of time sufficient for the apertures to draw all the fluid from the oscillating surface and the gap.
- the gap, as well as the oscillating surface and the aperture remain free of fluid.
- the discharge nozzle is preferably made of elastomer material having a cut through its thickness.
- the cut is normally closed due to the elasticity of the elastomer.
- the cut opens under slight pressure when fluid is transported from the supply container. This arrangement keeps the fluid in the container hermetically sealed during periods of nonuse.
- An electronic wave generator with a circuit that can turn the oscillating action on and off sequentially at a very high speed is preferred.
- the ratio of the “on” period versus the “off” period controls the duty cycle of ejection and, therefore, the ejection mean flow rate. Maximum flow is achieved when the oscillator is continuously “on.”
- Fluid is preferably supplied to the oscillating surface at a rate that is lower than the maximum ejection rate of the aperture. If the fluid supply exceeds the maximum ejection rate of the apertures, excessive fluid may overflow from the supply side of the oscillating surface. When the fluid used is paint or ink, overflow is undesirable.
- a system to collect liquid overflow may be used. This system includes a ring provided with a slot at its circumference which is connected to a pump. If fluid accidentally escapes from the oscillating surface and reaches the slot, it is drawn and returned to the supply container.
- Another method of preventing accidental overflow is provided by an electronic flow control valve. It has been found that as the amount of liquid over the surface increases, the current draw by the piezoelectric element decreases. If the current draw reaches a predetermined level which indicates that an overflow is about to occur, the electronic circuit transmits a signal to the flow control valve to reduce the flow of liquid to the surface. Thereby, overflow is avoided.
- the fluid ejection device 10 of the present invention comprises a vibrating surface 12 having a perimeter area 14 and a center area 16 .
- the perimeter 14 of vibrating surface 12 is affixed to an oscillator 18 which may, for example, be piezoceramic.
- the center area 16 of vibrating surface 12 is provided with a planar surface 15 through which there are apertures 22 .
- the portion of center 15 having the apertures is in surface tension contact with a fluid film 19 at the back side of planar surface 15 to produce an ejection of fluid droplets 20 .
- FIG. 2 The oscillatory motion of the vibrating surface 12 is shown in FIG. 2 .
- the perimeter 14 of the vibrating surface 12 by virtue of its contact with the oscillator 18 , oscillates in a vertical direction, as viewed in FIG. 2 , with an oscillating characteristic shown in the graph at the rightmost portion of FIG. 2 .
- the center 16 of vibrating surface 12 oscillates at the same frequency as the perimeter 14 , but with a much larger amplitude, as seen in the graph on the leftmost portion of FIG. 2 .
- the graphs of FIG. 2 are for purposes of illustration and are not necessarily drawn to scale.
- the significantly larger oscillation amplitude of the center of the vibrating surface in FIG. 2 is due primarily to two factors.
- One is the shape of the vibrating surface 12 and the other is the frequency of oscillation that is selected for activation of the oscillator 18 .
- vibrating surface 12 is configured so that its cross-section is reduced toward the center.
- the vibrating surface configuration may be understood best by referring to FIGS. 2, 3 , and 4 , which illustrate a preferred embodiment thereof.
- the apertures 22 in vibrating surface 12 may be understood best by referring to FIGS. 5 and 6 .
- the center portion 15 FIG.
- apertures 22 each characterized by a tapered wall 24 , forming a large opening 26 on one side of the center portion 15 and a small opening 28 on the opposite side thereof.
- the thickness of the center portion 15 of the vibrating surface 12 is preferably 0.003-inch.
- Each aperture 22 is positioned at or near the center of the vibrating surface and is circular in shape with large opening 26 having a radius of 0.006-inch and the small opening 28 thereof having a radius of 0.0025-inch.
- the shape of vibrating surface 12 and, in particular, the reduction in cross-section of the vibrating surface between its perimeter 14 ( FIG. 3 ) and its center 16 is selected to provide a significant increase in amplitude of oscillation between the perimeter and the center of vibrating surface 12 .
- This increase in oscillation amplitude has been found to occur at particular frequencies of oscillation of the vibrating surface 12 such as at the second harmonic of the natural oscillating frequency of the vibrating surface.
- the oscillation amplitude is 0.0001-inch at the perimeter.
- the frequency of oscillation is approximately 60,000 Hz, which corresponds to the second modal frequency of the vibrating surface 12 .
- the fluid droplet ejection level that is, the level above which the amplitude of oscillation of the center 15 of the vibrating surface 12 causes fluid droplets to be ejected therefrom, is approximately 0.0016-inch.
- the perimeter oscillation is adjusted so that the center oscillation varies in amplitude from cycle to cycle, so that it is just above the ejection level and below the ejection level upon alternate cycles.
- the actual ejection level threshold that is, the actual oscillation amplitude of the center of the vibrating surface which causes the ejection of fluid droplets, depends upon the characteristics of the fluid selected, as well as the shape and dimensions of the aperture 22 . In the particular preferred embodiment shown herein, the ejection level is achieved using gasoline.
- fluid 19 continuously adheres through solid/fluid surface tension to the large opening 26 of aperture 22 .
- the fluid is compressed in the first half of the oscillation ( FIG. 7 ) when the vibrating surface strokes toward the fluid and decompresses in the second half of the oscillation cycle ( FIG. 8 ) when the vibrating surface strokes away from the fluid.
- Droplets are ejected each time the amplitude of oscillation of the aperture element 15 ( FIG. 5 ) exceeds the ejection level threshold.
- the number of droplets and spacing therebetween are a function of the frequency of oscillation.
- FIG. 9 illustrates an alternate preferred embodiment of the fluid ejection device 30 of the present invention which comprises a cantilever beam 32 including a base portion 34 and a free end 36 .
- the base portion 34 is affixed to a piezoelectric oscillator 38 .
- the free end 36 of the beam 32 is provided with a planar surface through which there are nine microscopic tapered apertures. Fluid 42 is in contact with the free end 36 through which droplets 44 are ejected.
- FIG. 10 provides a front view of the fluid ejection device 30 and best illustrates the apertures 40 .
- FIG. 11 is an enlarged cross-sectional side view of the fluid ejection device 30 showing the free end 36 in contact with the fluid 42 .
- the large opening 46 of each aperture 40 is in surface tension contact with the fluid 42 .
- the piezoelectric element 38 ( FIG. 9 ) produces high-frequency oscillations at the base end 34 of the beam 32 .
- the planar surface 37 at the free end 36 oscillates at the same frequency as the base 34 , but with much greater amplitude.
- Such oscillation of the free end 36 is due primarily to two factors: the beam 32 is shaped such that its moment of inertia is reduced toward the free end 36 ; and the induced frequency is substantially the natural frequency of the beam 32 .
- the oscillation of the planar surface 37 produces cycles of pressure fluctuation at the interface between the fluid 42 and the surface 37 and inside the apertures 40 .
- the pressure fluctuation inside the apertures 40 and, particularly, near the inside wall 48 of each aperture is significantly more intense as compared to the pressure fluctuation near the planar surface 37 .
- This characteristic is exclusively attributed to the conical cross-sectional geometry of the apertures 40 .
- fluid cavitation is developed inside each aperture 40 at an oscillation amplitude that is too small to dynamically disturb the fluid 42 near the planar surface 37 .
- the cavitation inside the aperture 40 produces a negative pressure that draws fluid from the planar surface 37 into the large opening 46 of the aperture 40 and ejects a stream of droplets 44 from its small opening 47 to a great distance.
- the ultrasonic oscillations do not break up or nebulize the fluid 42 at the surface 37 , such fluid remaining dynamically at rest during the ejection of fluid 42 within the aperture 40 . Ejection continues until all the fluid 42 is drawn from the surface 37 and ejected forwardly as droplets 44 .
- the diameter of the large opening 46 of the aperture 40 is 0.006′′ and the diameter of the small opening 47 is 0.0025′′.
- the thickness of the planar surface 37 is 0.003′′ and the oscillation frequency is 50 kHz, which is the third natural frequency of the beam 32 .
- the ejector 30 described in the specification with respect to FIGS. 9, 10 , and 11 is now provided with a fluid supply system 50 that continuously transports fluid 51 to wet the oscillating surface 37 via a supply tube 53 ending at a supply nozzle 54 .
- the fluid 51 is transported to the surface 37 at a rate which is lower than the maximum ejection rate of the apertures 40 to prevent overflow of fluid 42 from the supply side of the oscillating surface 37 .
- a pinch valve 56 controls delivery of the fluid 51 to the oscillating surface 37 .
- the fluid supply system 50 is connected to an electronic flow control valve 52 which, in the preferred embodiment, is made by ICS sensors.
- the valve 52 is connected to an electronic circuit that detects the amount of liquid 42 on the oscillating surface 37 . In the event of excessive delivery of fluid, the oscillation amplitude decreases and the current draw by the piezoelectric element 38 decreases.
- a current sensor circuit 39 senses the current draw and transmits an overflow signal 41 to the flow control valve 52 to reduce the delivery rate of liquid 51 to the surface 37 until the amount of fluid returns to a normal level.
- FIG. 13 illustrates an alternative apparatus for preventing fluid overflow with the fluid supply system 50 .
- An additional ring element 58 including a slot 60 is installed near the oscillating surface 37 such that the slot 60 is positioned a predetermined distance from the boundary 62 of the fluid 42 .
- the preferred ring element 58 is manufactured by Clippard Instruments Laboratory, Inc. of Cincinnati, Ohio and is designated as Model No. 1022.
- the slot 60 is connected to a suction venturi pump (not shown) through an inlet 64 .
- a suction venturi pump, designated as Part No. 16480, is commercially available from Spraying Systems Co. of Wheaton, Ill.
- the boundary 62 of the fluid 42 expands toward the ring 58 and returns to the supply line 53 .
- FIG. 14 shows the ejection device 30 of FIG. 9 , further including an alternative fluid supply system 70 and an electrical wave generator 71 including a battery or external power inlet (not shown) to activate the piezoceramic element.
- the ejector device 30 is preferably attached to a platform 72 of the supply system 70 at the piezoelectric oscillator 38 .
- the supply system 70 includes a fluid supply container 74 which is preferably made from a flexible, disposable nylon material.
- a discharge nozzle 76 is affixed at a side wall of the supply container 74 providing fluid communication between fluid in the tube and the ejection device 30 . When force is applied to the side of the supply container 74 , the fluid inside the supply container 74 is pressurized and forced through the discharge nozzle 76 .
- the supply system 70 further includes a discharge valve apparatus 80 which is preferably attached to the platform 72 .
- the preferred discharge apparatus 80 includes a spring-loaded plunger 82 acting on the external side wall of the supply container 74 against a rear opening of the discharge nozzle 76 to prevent unwanted discharge of fluid from the supply container 74 .
- the plunger 82 When the plunger 82 is released, fluid is discharged toward the oscillating surface 37 . Fluid enters into a gap 84 between the nozzle 76 and the surface 37 and is held by surface tension contact. In the preferred embodiment this gap is 0.025′′.
- the alternative fluid supply system 70 additionally provides a means for applying mechanical pressure 90 on the nylon container 74 to force the fluid through the nozzle 76 .
- the pressure-applying means 90 includes a pressure plate 92 pivotally attached to a torsion spring 94 for applying a compressive force on a side wall 75 of the container 74 .
- the pressure plate 58 can be rotated clockwise to a released position, facilitating the unloading and loading of fluid supply containers 74 .
- the pressure plate 92 applies a continuous pressure of approximately 10 psi to the fluid inside the nylon container 74 .
- FIG. 15 provides an enlarged cross-sectional side view of the supply container 74 including an integrally-formed discharge nozzle 76 attached at a side wall of the container 74 .
- the nozzle includes a rear surface 77 in fluid communication with fluid inside the supply container 74 and a front surface 79 positioned in close proximity to the vibrating free surface 37 .
- FIG. 16 provides an enlarged cross-sectional side view of the discharge nozzle 76 .
- a circumferential ridge 78 formed around the discharge nozzle 76 ensures that the gap 84 is maintained at its preferred distance.
- the nozzle 76 is preferably made of an elastomer material and includes a cut 96 through part of its thickness. The cut 96 is normally closed because of the natural elasticity of the elastomer material. Fluid pressure applied to the rear side of the nozzle opening 98 forces the cut 96 to open and allow passage of liquid to the oscillating surface 37 .
- the discharge nozzle 76 is designed to keep the fluid in the supply tube 76 hermetically sealed when the fluid ejection device 30 is not in use.
- FIG. 17 illustrates another alternative preferred embodiment of the fluid ejection device wherein the oscillating surface comprises a curved member 100 with two piezoelectric elements 102 a , 102 b respectively affixed to front surfaces 104 a , 104 b .
- the piezoelectric elements 102 a , 102 b impart oscillations to a thin angled surface 106 located centrally on the curved member 100 , causing fluid 108 to be ejected forwardly as a divergent stream of droplets 110 .
- a predetermined curvature characteristic of the angled surface 106 results in a wider distribution of the droplets 110 within an ejection angle 112 .
- FIG. 18 provides a front view of the curved member 100 and further illustrates that the angled surface 106 is bound on its perimeter by a window opening 114 .
- the angled surface 106 includes 45 apertures 116 in a 5 ⁇ 9 matrix.
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Abstract
A fluid injection device for ejecting fluid droplets in response to electrical signals comprises an oscillating surface that has one or more tapered apertures, each aperture having a first and second opening. The first opening of each aperture is larger than the second opening. The first opening is in surface tension contact with the fluid to be ejected. The fluid interaction with the tapered aperture wall creates cycles of fluid compression and decompression inside the aperture, causing fluid to be drawn from the large opening and ejected out the small opening of the aperture. The device includes a fluid supply nozzle that transports fluid to the oscillating surface at the large opening of the apertures. A discharge valve controls the fluid supply. An electronic wave generator induces oscillation in the tapered aperture containing surface. The device is used to great advantage for fluid atomization and fluid spray.
Description
- This application is a continuation-in-part of patent application Ser. No. 07/726,777 filed on Jul. 8, 1991, which is a continuation-in-part of patent application Ser. No. 07/691,584 filed on Apr. 24, 1991, now U.S. Pat. No. 5,164,740.
- 1. Field of the Invention
- The present invention relates to the fields of liquid spray and atomization of liquids of all kinds and, more specifically, finds utility in humidification and misting, industrial cleaning, surface coating and treatment, particle coating and encapsulating, fuel atomization, and medical spray applications.
- 2. Description of Related Art
- Many types of ultrasonic fluid ejection devices have been developed for atomizing of water or liquid fuel. These atomizers can be classified into two groups. The first type atomizes liquid that forms a thin layer on an ultrasonically-excited plate. The first type is not capable of ejecting atomized fluid droplets. U.S. Pat. No. 3,738,574 describes an atomizer of this type.
- The second type utilizes a housing defining an enclosed chamber. The housing includes a perforated membrane or a pinhole membrane as the front wall of the chamber. The apparatus further includes a means to vibrate the membrane or a side wall of the chamber, typically by a piezoelectric element affixed to the front face of the chamber. The piezoelectric element oscillates the fluid in the chamber. As a result, pressure waves are generated in the chamber, forcing fluid through the open pinholes. All the devices of the second type require fluid to be kept inside the chamber next to the discharge opening. When volatile fluids are used, problems arise. The volatile fluids escape through the discharge opening. The discharge opening will clog, restricting or stopping further discharge. These problems are prevalent with volatile fluids such as fuel, paint, or other coating materials. To overcome these problems, U.S. Pat. No. 4,632,311 utilizes a chamber with a suction pump in communication with the chamber. The pump is energized after operation to drain the liquid from the chamber, leaving it dry during nonworking periods. This is supposed to prevent otherwise solid substances from clogging the nozzle opening. U.S. Pat. No. 4,533,082 uses a vacuum pump to ensure that the liquid in the chamber is kept under negative pressure during nonuse. In these devices it is particularly difficult to feed fluid into the chamber without causing the fluid to uncontrollably flow out of the discharge opening.
- Other variations of apparatus for ejecting atomized liquid, utilizing one of the above two types, are disclosed in U.S. Pat. Nos. 3,812,854, 4,159,803, 4,300,546, 4,334,531, 4,465,234, 4,632,311, 4,338,576, and 4,850,534.
- The present invention provides an ejection device that includes a free oscillating surface having microscopic tapered apertures of a selected conical cross-sectional shape. The apertures draw fluid into their large openings and eject the fluid from their small openings to a great distance. The ejection action is developed by the aperture, regardless of the amount of fluid in contact with the oscillating surface, and without any fluid pressure. Both sides of the oscillating surface are operating under the same ambient pressure. Therefore, the ejection device can operate equally well in vacuum or high-pressure environments. When only a thin film of fluid is allowed to adhere, in surface tension contact, to the large opening of an aperture, the supplied liquid continuously adheres to the large opening by surface tension. The film of fluid oscillates with the surface while it is being drawn into the large opening of the aperture and ejected forwardly. This continues until all the fluid is drawn from the surface, leaving the surface dry and free of liquid during the Lime that the device is not in use.
- If the cross-section of the aperture is chosen with respect to the fluid to be ejected, the oscillation required to produce ejection is kept small, and the film of fluid on the oscillating surface appears to be dynamically at rest during ejection. By supplying only enough fluid to continuously form a thin film, in surface tension contact with the oscillating surface, to the side containing the large openings of the tapered apertures, neither clogging nor uncontrolled emission or leakage through the apertures occurs. The device can operate under any pressure conditions.
- The general purpose and advances of the present invention will be more fully understood hereinafter as a result of the detailed description of the preferred embodiments when taken in conjunction with the following drawings, in which:
-
FIG. 1 is a schematic illustration of a preferred embodiment of a device according to the present invention; -
FIG. 2 is the schematic illustration of the present invention ofFIG. 1 shown in its oscillating configuration; -
FIG. 3 is a top view of a vibrating surface according to the present invention; -
FIG. 4 is a bottom view of a vibrating surface according to the present invention; -
FIG. 5 is an enlarged cross-sectional view of the center area of the membrane shown inFIG. 2 and labelled “5”; -
FIG. 6 is an enlarged elevational view of the center area of the vibrating surface of the present invention showing a preferred aperture shape; -
FIG. 7 is a schematic illustration of the fluid characteristic within a tapered aperture during half of an oscillation cycle; -
FIG. 8 is a schematic illustration of the fluid characteristic with a tapered aperture during half of an oscillation cycle; -
FIG. 9 is a side view of an alternate preferred embodiment of the fluid ejection device according to the present invention; -
FIG. 10 is a front view of the fluid ejection device ofFIG. 9 ; -
FIG. 11 is an enlarged cross-sectional side view of the free end of the fluid ejection device ofFIG. 9 ; -
FIG. 12 illustrates the ejector ofFIG. 9 provided with a fluid supply system; -
FIG. 13 illustrates an alternative apparatus for preventing accidental overflow in the fluid supply system ofFIG. 12 ; -
FIG. 14 illustrates the ejector ofFIG. 9 provided with an alternative fluid supply system; -
FIG. 15 is an enlarged cross-sectional side view of the fluid supply tube ofFIG. 14 including a discharge nozzle attached at a side wall of the supply tube; -
FIG. 16 is an enlarged cross-sectional side view of the discharge nozzle ofFIG. 14 ; -
FIG. 17 is a side view of another alternative preferred embodiment of the fluid ejection device according to the present invention; and -
FIG. 18 is a front view of the fluid ejection device ofFIG. 17 . - The present invention provides a new fluid ejection device that is especially advantageous in applications that require ejection of fluid droplets without fluid pressure and without a propellant and in ambient pressure environments.
- A particularly important application for the present invention is industrial spray systems. The ejector is capable of ejecting viscose liquid such as paint and coating materials without the use of compressed air.
- The use of air as a propellant in paint spray application causes overspray, in that part of the paint droplets escape to the atmosphere and cause air pollution. The transfer efficiency, that is, the percentage amount of coating material, such as paint, that reaches the target, is significantly increased when ejection is without air.
- Another important application of the present invention is for consumer products such as deodorant and hair spray. The use of propellants in conventional aerosols, commonly known as volatile organic chemicals (VOCs), has a negative effect on the environment and on human health There is an ongoing trend to find ways to atomize fluid without using such propellant gases.
- The present invention provides a device that ejects fluid from microscopic tapered apertures. The fluid is transported to the ejecting surface at the large opening of the tapered aperture. A cohesive attraction force (surface tension) exclusively causes the liquid to adhere to the tapered aperture. The solid/fluid interaction of the fluid with the tapered aperture wall causes fluid to be drawn into the large opening of the aperture and ejected from its small opening. This ejection action is attributed to the geometry of the aperture, as well as the fluid characteristics such as viscosity, density, and elasticity. The fluid supply to the surface is tightly controlled to prevent overflow of liquid from the supply side of the oscillating surface. A flow control valve or a two-way valve is provided to control the amount of fluid that is transported to the surface. The valve may have a built-in electrical contact that activates oscillation simultaneously with the flow of fluid.
- During ejection, fluid is supplied to the oscillating surface from a discharge nozzle that is in close proximity to the oscillating surface. The fluid is held by surface tension forces in the small gap between the front face of the fluid supply nozzle and the oscillating surface. When the fluid supply is stopped, the surface with the tapered apertures is allowed to oscillate for a period of time sufficient for the apertures to draw all the fluid from the oscillating surface and the gap. When not in use, the gap, as well as the oscillating surface and the aperture, remain free of fluid.
- The discharge nozzle is preferably made of elastomer material having a cut through its thickness. The cut is normally closed due to the elasticity of the elastomer. The cut opens under slight pressure when fluid is transported from the supply container. This arrangement keeps the fluid in the container hermetically sealed during periods of nonuse.
- An electronic wave generator with a circuit that can turn the oscillating action on and off sequentially at a very high speed is preferred. The ratio of the “on” period versus the “off” period controls the duty cycle of ejection and, therefore, the ejection mean flow rate. Maximum flow is achieved when the oscillator is continuously “on.”
- Fluid is preferably supplied to the oscillating surface at a rate that is lower than the maximum ejection rate of the aperture. If the fluid supply exceeds the maximum ejection rate of the apertures, excessive fluid may overflow from the supply side of the oscillating surface. When the fluid used is paint or ink, overflow is undesirable. To prevent overflow, a system to collect liquid overflow may be used. This system includes a ring provided with a slot at its circumference which is connected to a pump. If fluid accidentally escapes from the oscillating surface and reaches the slot, it is drawn and returned to the supply container.
- Another method of preventing accidental overflow is provided by an electronic flow control valve. It has been found that as the amount of liquid over the surface increases, the current draw by the piezoelectric element decreases. If the current draw reaches a predetermined level which indicates that an overflow is about to occur, the electronic circuit transmits a signal to the flow control valve to reduce the flow of liquid to the surface. Thereby, overflow is avoided.
- Referring now to
FIG. 1 , it will be seen that thefluid ejection device 10 of the present invention comprises a vibratingsurface 12 having aperimeter area 14 and acenter area 16. Theperimeter 14 of vibratingsurface 12 is affixed to anoscillator 18 which may, for example, be piezoceramic. Thecenter area 16 of vibratingsurface 12 is provided with aplanar surface 15 through which there areapertures 22. The portion ofcenter 15 having the apertures is in surface tension contact with afluid film 19 at the back side ofplanar surface 15 to produce an ejection offluid droplets 20. - The oscillatory motion of the vibrating
surface 12 is shown inFIG. 2 . It will be seen therein that theperimeter 14 of the vibratingsurface 12, by virtue of its contact with theoscillator 18, oscillates in a vertical direction, as viewed inFIG. 2 , with an oscillating characteristic shown in the graph at the rightmost portion ofFIG. 2 . As also seen inFIG. 2 , thecenter 16 of vibratingsurface 12 oscillates at the same frequency as theperimeter 14, but with a much larger amplitude, as seen in the graph on the leftmost portion ofFIG. 2 . The graphs ofFIG. 2 are for purposes of illustration and are not necessarily drawn to scale. - The significantly larger oscillation amplitude of the center of the vibrating surface in
FIG. 2 , as compared to the perimeter, is due primarily to two factors. One is the shape of the vibratingsurface 12 and the other is the frequency of oscillation that is selected for activation of theoscillator 18. More specifically, vibratingsurface 12 is configured so that its cross-section is reduced toward the center. The vibrating surface configuration may be understood best by referring toFIGS. 2, 3 , and 4, which illustrate a preferred embodiment thereof. Theapertures 22 in vibratingsurface 12 may be understood best by referring toFIGS. 5 and 6 . As seen therein, the center portion 15 (FIG. 5 ) of the vibratingsurface 12 is provided withapertures 22, each characterized by a taperedwall 24, forming alarge opening 26 on one side of thecenter portion 15 and asmall opening 28 on the opposite side thereof. The thickness of thecenter portion 15 of the vibratingsurface 12 is preferably 0.003-inch. Eachaperture 22 is positioned at or near the center of the vibrating surface and is circular in shape withlarge opening 26 having a radius of 0.006-inch and thesmall opening 28 thereof having a radius of 0.0025-inch. - The shape of vibrating
surface 12 and, in particular, the reduction in cross-section of the vibrating surface between its perimeter 14 (FIG. 3 ) and itscenter 16, is selected to provide a significant increase in amplitude of oscillation between the perimeter and the center of vibratingsurface 12. This increase in oscillation amplitude has been found to occur at particular frequencies of oscillation of the vibratingsurface 12 such as at the second harmonic of the natural oscillating frequency of the vibrating surface. In the preferred embodiment of the present invention, it is desirable to have a damping ratio of at least 10 percent and to provide an amplitude ratio between the center area and the perimeter of the vibrating surface of at least 10, depending upon the voltage applied to theoscillator 18 and its mechanical responsiveness thereto. - When the center of the vibrating surface oscillates with an amplitude which exceeds a preselected threshold, fluid droplets are ejected from aperture 22 (
FIG. 1 ) at the frequency of oscillation ofoscillator 18. Thus, by controlling the amplitude of the perimeter oscillation and, thus, the amplitude of the center oscillation so that it is either above or below this threshold ejection level, the ejection of fluid droplets may be readily controlled. - In one embodiment that has been reduced to practice, the oscillation amplitude is 0.0001-inch at the perimeter. The frequency of oscillation is approximately 60,000 Hz, which corresponds to the second modal frequency of the vibrating
surface 12. The fluid droplet ejection level, that is, the level above which the amplitude of oscillation of thecenter 15 of the vibratingsurface 12 causes fluid droplets to be ejected therefrom, is approximately 0.0016-inch. The perimeter oscillation is adjusted so that the center oscillation varies in amplitude from cycle to cycle, so that it is just above the ejection level and below the ejection level upon alternate cycles. The actual ejection level threshold, that is, the actual oscillation amplitude of the center of the vibrating surface which causes the ejection of fluid droplets, depends upon the characteristics of the fluid selected, as well as the shape and dimensions of theaperture 22. In the particular preferred embodiment shown herein, the ejection level is achieved using gasoline. - As shown in
FIGS. 7 and 8 ,fluid 19 continuously adheres through solid/fluid surface tension to thelarge opening 26 ofaperture 22. The fluid is compressed in the first half of the oscillation (FIG. 7 ) when the vibrating surface strokes toward the fluid and decompresses in the second half of the oscillation cycle (FIG. 8 ) when the vibrating surface strokes away from the fluid. Droplets are ejected each time the amplitude of oscillation of the aperture element 15 (FIG. 5 ) exceeds the ejection level threshold. The number of droplets and spacing therebetween are a function of the frequency of oscillation. In the preferred embodiment hereof, at a 60,000-Hz oscillation frequency, it has been found that when the ejection amplitude is continually above the threshold level, droplets are attached to each other and form a continuous stream. By altering the oscillation amplitude, such as by reducing it below the threshold level every second cycle, the droplets can be separated. This feature is particularly advantageous in fuel injection systems. It will be understood, however, that with selected changes in the shape of the vibratingsurface 12, the characteristic of the fluid, and in the shape and dimensions ofaperture 22, the selected frequency of operation may vary from that recited herein. Nevertheless, based upon the preferred embodiment disclosed herein, it will now be understood that ejection may be achieved by the present invention and that, in fact, fluid-droplet ejection at frequencies exceeding 60,000 Hz is readily achieved. -
FIG. 9 illustrates an alternate preferred embodiment of thefluid ejection device 30 of the present invention which comprises acantilever beam 32 including abase portion 34 and afree end 36. Thebase portion 34 is affixed to apiezoelectric oscillator 38. Thefree end 36 of thebeam 32 is provided with a planar surface through which there are nine microscopic tapered apertures.Fluid 42 is in contact with thefree end 36 through whichdroplets 44 are ejected. -
FIG. 10 provides a front view of thefluid ejection device 30 and best illustrates theapertures 40.FIG. 11 is an enlarged cross-sectional side view of thefluid ejection device 30 showing thefree end 36 in contact with the fluid 42. Thelarge opening 46 of eachaperture 40 is in surface tension contact with the fluid 42. The piezoelectric element 38 (FIG. 9 ) produces high-frequency oscillations at thebase end 34 of thebeam 32. Theplanar surface 37 at thefree end 36 oscillates at the same frequency as thebase 34, but with much greater amplitude. Such oscillation of thefree end 36 is due primarily to two factors: thebeam 32 is shaped such that its moment of inertia is reduced toward thefree end 36; and the induced frequency is substantially the natural frequency of thebeam 32. - The oscillation of the
planar surface 37 produces cycles of pressure fluctuation at the interface between the fluid 42 and thesurface 37 and inside theapertures 40. The pressure fluctuation inside theapertures 40 and, particularly, near theinside wall 48 of each aperture, is significantly more intense as compared to the pressure fluctuation near theplanar surface 37. This characteristic is exclusively attributed to the conical cross-sectional geometry of theapertures 40. As a result, fluid cavitation is developed inside eachaperture 40 at an oscillation amplitude that is too small to dynamically disturb the fluid 42 near theplanar surface 37. The cavitation inside theaperture 40 produces a negative pressure that draws fluid from theplanar surface 37 into thelarge opening 46 of theaperture 40 and ejects a stream ofdroplets 44 from itssmall opening 47 to a great distance. The ultrasonic oscillations do not break up or nebulize the fluid 42 at thesurface 37, such fluid remaining dynamically at rest during the ejection offluid 42 within theaperture 40. Ejection continues until all the fluid 42 is drawn from thesurface 37 and ejected forwardly asdroplets 44. In this preferred embodiment, the diameter of thelarge opening 46 of theaperture 40 is 0.006″ and the diameter of thesmall opening 47 is 0.0025″. The thickness of theplanar surface 37 is 0.003″ and the oscillation frequency is 50 kHz, which is the third natural frequency of thebeam 32. - Referring now to
FIG. 12 , theejector 30 described in the specification with respect toFIGS. 9, 10 , and 11 is now provided with afluid supply system 50 that continuously transportsfluid 51 to wet theoscillating surface 37 via asupply tube 53 ending at asupply nozzle 54. The fluid 51 is transported to thesurface 37 at a rate which is lower than the maximum ejection rate of theapertures 40 to prevent overflow offluid 42 from the supply side of theoscillating surface 37. Apinch valve 56 controls delivery of the fluid 51 to theoscillating surface 37. Thefluid supply system 50 is connected to an electronicflow control valve 52 which, in the preferred embodiment, is made by ICS sensors. Thevalve 52 is connected to an electronic circuit that detects the amount ofliquid 42 on theoscillating surface 37. In the event of excessive delivery of fluid, the oscillation amplitude decreases and the current draw by thepiezoelectric element 38 decreases. Acurrent sensor circuit 39 senses the current draw and transmits anoverflow signal 41 to theflow control valve 52 to reduce the delivery rate of liquid 51 to thesurface 37 until the amount of fluid returns to a normal level. -
FIG. 13 illustrates an alternative apparatus for preventing fluid overflow with thefluid supply system 50. Anadditional ring element 58 including aslot 60 is installed near theoscillating surface 37 such that theslot 60 is positioned a predetermined distance from theboundary 62 of the fluid 42. Thepreferred ring element 58 is manufactured by Clippard Instruments Laboratory, Inc. of Cincinnati, Ohio and is designated as Model No. 1022. Theslot 60 is connected to a suction venturi pump (not shown) through aninlet 64. A suction venturi pump, designated as Part No. 16480, is commercially available from Spraying Systems Co. of Wheaton, Ill. In the event of overflow, theboundary 62 of the fluid 42 expands toward thering 58 and returns to thesupply line 53. -
FIG. 14 shows theejection device 30 ofFIG. 9 , further including an alternativefluid supply system 70 and an electrical wave generator 71 including a battery or external power inlet (not shown) to activate the piezoceramic element. Theejector device 30 is preferably attached to aplatform 72 of thesupply system 70 at thepiezoelectric oscillator 38. Thesupply system 70 includes afluid supply container 74 which is preferably made from a flexible, disposable nylon material. Adischarge nozzle 76 is affixed at a side wall of thesupply container 74 providing fluid communication between fluid in the tube and theejection device 30. When force is applied to the side of thesupply container 74, the fluid inside thesupply container 74 is pressurized and forced through thedischarge nozzle 76. - The
supply system 70 further includes adischarge valve apparatus 80 which is preferably attached to theplatform 72. Thepreferred discharge apparatus 80 includes a spring-loadedplunger 82 acting on the external side wall of thesupply container 74 against a rear opening of thedischarge nozzle 76 to prevent unwanted discharge of fluid from thesupply container 74. When theplunger 82 is released, fluid is discharged toward theoscillating surface 37. Fluid enters into agap 84 between thenozzle 76 and thesurface 37 and is held by surface tension contact. In the preferred embodiment this gap is 0.025″. - The alternative
fluid supply system 70 additionally provides a means for applyingmechanical pressure 90 on thenylon container 74 to force the fluid through thenozzle 76. The pressure-applyingmeans 90 includes apressure plate 92 pivotally attached to atorsion spring 94 for applying a compressive force on a side wall 75 of thecontainer 74. As shown inFIG. 14 , thepressure plate 58 can be rotated clockwise to a released position, facilitating the unloading and loading offluid supply containers 74. In operation, thepressure plate 92 applies a continuous pressure of approximately 10 psi to the fluid inside thenylon container 74. -
FIG. 15 provides an enlarged cross-sectional side view of thesupply container 74 including an integrally-formeddischarge nozzle 76 attached at a side wall of thecontainer 74. The nozzle includes arear surface 77 in fluid communication with fluid inside thesupply container 74 and afront surface 79 positioned in close proximity to the vibratingfree surface 37. -
FIG. 16 provides an enlarged cross-sectional side view of thedischarge nozzle 76. As can be readily appreciated, acircumferential ridge 78 formed around thedischarge nozzle 76 ensures that thegap 84 is maintained at its preferred distance. Thenozzle 76 is preferably made of an elastomer material and includes acut 96 through part of its thickness. Thecut 96 is normally closed because of the natural elasticity of the elastomer material. Fluid pressure applied to the rear side of thenozzle opening 98 forces thecut 96 to open and allow passage of liquid to theoscillating surface 37. Thedischarge nozzle 76 is designed to keep the fluid in thesupply tube 76 hermetically sealed when thefluid ejection device 30 is not in use. -
FIG. 17 illustrates another alternative preferred embodiment of the fluid ejection device wherein the oscillating surface comprises acurved member 100 with twopiezoelectric elements 102 a, 102 b respectively affixed tofront surfaces 104 a, 104 b. Thepiezoelectric elements 102 a, 102 b impart oscillations to a thinangled surface 106 located centrally on thecurved member 100, causingfluid 108 to be ejected forwardly as a divergent stream ofdroplets 110. A predetermined curvature characteristic of theangled surface 106 results in a wider distribution of thedroplets 110 within anejection angle 112.FIG. 18 provides a front view of thecurved member 100 and further illustrates that theangled surface 106 is bound on its perimeter by awindow opening 114. Preferably, theangled surface 106 includes 45apertures 116 in a 5×9 matrix. - It will now be understood that what has been disclosed herein comprises a novel and highly innovative fluid ejection device readily adapted for use in a variety of applications requiring the ejection of small droplets of fluid in a precisely controlled manner.
- Those having skill in the art to which the present invention pertains will now, as a result of the Applicant's teaching herein, perceive various modifications and additions which may be made to the invention. By way of example, the shapes, dimensions, and materials disclosed herein are merely illustrative of a preferred embodiment which has been reduced to practice. However, it will be understood that such shapes, dimensions, and materials are not to be considered limiting of the invention which may be readily provided in other shapes, dimensions, and materials.
Claims (10)
1-26. (canceled)
27. A droplet ejection device comprising:
a curved member having a plurality of tapered apertures extending therethrough;
a support structure that is configured to support the curved member in a manner that permits the curved member to vibrate;
a piezoelectric member that is configured to vibrate the curved member; and
a source of liquid;
wherein upon supplying a liquid to the curved member and vibrating the curved member with the piezoelectric member, liquid droplets are ejected through the tapered apertures.
28. A device as in claim 27 , wherein the source of liquid is unpressurized when supplied to the curved member.
29. A device as in claim 27 , wherein the tapered apertures are circular in geometry.
30. A device as in claim 27 , wherein the curved member has a front surface and a rear surface, and wherein the apertures taper from the rear surface to the front surface.
31. A device as in claim 30 , wherein the source of liquid is in communication with the rear surface.
32. A droplet ejection device, comprising:
a curved member having a plurality of tapered apertures extending therethrough;
a support structure that is configured to support the curved member in a manner that permits the curved member to vibrate;
a piezoelectric member that is configured to vibrate the curved member;
a region adapted to hold a volume of liquid, with the liquid being in contact with the curved member;
wherein upon vibrating the curved member with the piezoelectric member, liquid droplets are ejected through the tapered apertures.
33. A device as in claim 32 , wherein the tapered apertures are circular in geometry.
34. A device as in claim 32 , wherein the curved member has a front surface and a rear surface, and wherein the apertures taper from the rear surface to the front surface.
34. A device as in claim 32 , wherein the volume of liquid is unpressurized.
Priority Applications (1)
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US11/532,602 US20070075161A1 (en) | 1991-04-24 | 2006-09-18 | Droplet Ejector With Oscillating Tapered Aperture |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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US07/691,584 US5164740A (en) | 1991-04-24 | 1991-04-24 | High frequency printing mechanism |
US72677791A | 1991-07-08 | 1991-07-08 | |
US08/163,850 US6629646B1 (en) | 1991-04-24 | 1993-12-07 | Droplet ejector with oscillating tapered aperture |
US10/428,256 US6926208B2 (en) | 1991-04-24 | 2003-05-02 | Droplet ejector with oscillating tapered aperture |
US11/125,812 US7108197B2 (en) | 1991-04-24 | 2005-05-09 | Droplet ejector with oscillating tapered aperture |
US11/532,602 US20070075161A1 (en) | 1991-04-24 | 2006-09-18 | Droplet Ejector With Oscillating Tapered Aperture |
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US11/125,812 Continuation US7108197B2 (en) | 1991-04-24 | 2005-05-09 | Droplet ejector with oscillating tapered aperture |
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US10/428,256 Expired - Fee Related US6926208B2 (en) | 1991-04-24 | 2003-05-02 | Droplet ejector with oscillating tapered aperture |
US11/125,812 Expired - Fee Related US7108197B2 (en) | 1991-04-24 | 2005-05-09 | Droplet ejector with oscillating tapered aperture |
US11/532,602 Abandoned US20070075161A1 (en) | 1991-04-24 | 2006-09-18 | Droplet Ejector With Oscillating Tapered Aperture |
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US08/163,850 Expired - Lifetime US6629646B1 (en) | 1991-04-24 | 1993-12-07 | Droplet ejector with oscillating tapered aperture |
US10/428,256 Expired - Fee Related US6926208B2 (en) | 1991-04-24 | 2003-05-02 | Droplet ejector with oscillating tapered aperture |
US11/125,812 Expired - Fee Related US7108197B2 (en) | 1991-04-24 | 2005-05-09 | Droplet ejector with oscillating tapered aperture |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US8967493B2 (en) | 2010-06-15 | 2015-03-03 | Aptar Radolfzell Gmbh | Atomizing device |
US9068566B2 (en) | 2011-01-21 | 2015-06-30 | Biodot, Inc. | Piezoelectric dispenser with a longitudinal transducer and replaceable capillary tube |
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Families Citing this family (124)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7628339B2 (en) * | 1991-04-24 | 2009-12-08 | Novartis Pharma Ag | Systems and methods for controlling fluid feed to an aerosol generator |
US5938117A (en) * | 1991-04-24 | 1999-08-17 | Aerogen, Inc. | Methods and apparatus for dispensing liquids as an atomized spray |
US6629646B1 (en) * | 1991-04-24 | 2003-10-07 | Aerogen, Inc. | Droplet ejector with oscillating tapered aperture |
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US6085740A (en) * | 1996-02-21 | 2000-07-11 | Aerogen, Inc. | Liquid dispensing apparatus and methods |
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NL1026752C2 (en) * | 2004-07-30 | 2006-02-02 | Stork Veco Bv | Atomizing plate for atomizing a fluid, method for manufacturing an atomizing plate and application of an atomizing plate. |
DE102005005540B4 (en) * | 2005-02-07 | 2007-10-04 | Pari GmbH Spezialisten für effektive Inhalation | In various modes controllable inhalation therapy device |
WO2007094758A2 (en) * | 2005-02-09 | 2007-08-23 | S3I, Llc | Method and system for detecting, classifying and identifying particles |
DE102005006375B4 (en) * | 2005-02-11 | 2007-10-11 | Pari GmbH Spezialisten für effektive Inhalation | Aerosol generating device for inhalation therapy devices |
US20060198940A1 (en) * | 2005-03-04 | 2006-09-07 | Mcmorrow David | Method of producing particles utilizing a vibrating mesh nebulizer for coating a medical appliance, a system for producing particles, and a medical appliance |
US20060198942A1 (en) * | 2005-03-04 | 2006-09-07 | O'connor Timothy | System and method for coating a medical appliance utilizing a vibrating mesh nebulizer |
US20060198941A1 (en) * | 2005-03-04 | 2006-09-07 | Niall Behan | Method of coating a medical appliance utilizing a vibrating mesh nebulizer, a system for coating a medical appliance, and a medical appliance produced by the method |
EP1924310B1 (en) * | 2005-08-23 | 2016-04-20 | Nektar Therapeutics | Self-sealing T-piece and valved T-piece |
US7458662B2 (en) * | 2005-10-18 | 2008-12-02 | Brother Kogyo Kabushiki Kaisha | Liquid droplet-jetting head, liquid droplet-jetting apparatus, and liquid droplet-jetting method |
TWI294789B (en) * | 2005-11-29 | 2008-03-21 | Ind Tech Res Inst | Droplet ejecting head |
EP1792662A1 (en) | 2005-11-30 | 2007-06-06 | Microflow Engineering SA | Volatile liquid droplet dispenser device |
PT1962805T (en) | 2005-12-08 | 2016-10-05 | Insmed Inc | Lipid-based compositions of antiinfectives for treating pulmonary infections |
TWI279256B (en) * | 2005-12-13 | 2007-04-21 | Ind Tech Res Inst | A compact spray cooling module |
US20070197486A1 (en) * | 2005-12-20 | 2007-08-23 | Verus Pharmaceuticals, Inc. | Methods and systems for the delivery of corticosteroids |
US20070160542A1 (en) * | 2005-12-20 | 2007-07-12 | Verus Pharmaceuticals, Inc. | Methods and systems for the delivery of corticosteroids having an enhanced pharmacokinetic profile |
US20070185066A1 (en) * | 2005-12-20 | 2007-08-09 | Verus Pharmaceuticals, Inc. | Systems and methods for the delivery of corticosteroids |
US20070249572A1 (en) * | 2005-12-20 | 2007-10-25 | Verus Pharmaceuticals, Inc. | Systems and methods for the delivery of corticosteroids |
TWI290485B (en) * | 2005-12-30 | 2007-12-01 | Ind Tech Res Inst | Spraying device |
WO2007095341A2 (en) * | 2006-02-15 | 2007-08-23 | Tika Läkemedel Ab | Sterilization of corticosteroids with reduced mass loss |
US7958887B2 (en) | 2006-03-10 | 2011-06-14 | Aradigm Corporation | Nozzle pore configuration for intrapulmonary delivery of aerosolized formulations |
TWI279518B (en) * | 2006-06-12 | 2007-04-21 | Ind Tech Res Inst | Loop type heat dissipating apparatus with spray cooling device |
WO2008029216A1 (en) * | 2006-08-30 | 2008-03-13 | Novo Nordisk A/S | Apparatus and method for aerosol generation using piezo actuators which are controlled independently of each other |
TWI304466B (en) * | 2006-10-24 | 2008-12-21 | Ind Tech Res Inst | Micro spray cooling system |
US20080135643A1 (en) * | 2006-12-08 | 2008-06-12 | Kimberly-Clark Worldwide, Inc. | Pulsating spray dispensers |
EP1952896B1 (en) * | 2007-02-01 | 2012-11-07 | EP Systems SA | Droplet dispenser |
US8021649B2 (en) | 2007-02-22 | 2011-09-20 | Cronk Peter J | Continuous spray scalp therapy and dispensing systems for same |
US20080206156A1 (en) * | 2007-02-22 | 2008-08-28 | Cronk Peter J | Continuous spray scalp therapy and dispensing systems for same |
FR2912935B1 (en) * | 2007-02-23 | 2009-05-15 | Oreal | DEVICE FOR SPRAYING A FIXATION COMPOSITION |
US9119783B2 (en) | 2007-05-07 | 2015-09-01 | Insmed Incorporated | Method of treating pulmonary disorders with liposomal amikacin formulations |
US9119777B2 (en) | 2008-05-30 | 2015-09-01 | Microdose Therapeutx, Inc. | Methods and compositions for administration of oxybutynin |
US8415390B2 (en) | 2008-05-30 | 2013-04-09 | Microdose Therapeutx, Inc. | Methods and compositions for administration of oxybutynin |
US8439033B2 (en) | 2007-10-09 | 2013-05-14 | Microdose Therapeutx, Inc. | Inhalation device |
FR2927237B1 (en) * | 2008-02-13 | 2011-12-23 | Oreal | DEVICE FOR SPRAYING A COSMETIC PRODUCT WITH HOT OR COLD AIR BLOWING |
FR2927240B1 (en) * | 2008-02-13 | 2011-11-11 | Oreal | SPRAY HEAD COMPRISING A SINGOTRODE, RUNWAYED BY A CANAL OF THE PRODUCT |
FR2927238B1 (en) * | 2008-02-13 | 2012-08-31 | Oreal | SPRAY DEVICE COMPRISING A SOUNDRODE |
FR2927976A1 (en) * | 2008-02-27 | 2009-08-28 | Fluid Automation Syst | ELECTRICALLY ACTUATED VALVE HAVING BALL SEALING ELEMENT. |
US8371294B2 (en) * | 2008-02-29 | 2013-02-12 | Microdose Therapeutx, Inc. | Method and apparatus for driving a transducer of an inhalation device |
US20090242660A1 (en) * | 2008-03-25 | 2009-10-01 | Quatek Co., Ltd. | Medical liquid droplet apparatus |
TWI338592B (en) * | 2008-03-25 | 2011-03-11 | Ind Tech Res Inst | Nozzle plate of a spray apparatus and fabrication method thereof |
US8555874B2 (en) | 2008-04-04 | 2013-10-15 | Nektar Therapeutics | Aerosolization device |
US7891580B2 (en) * | 2008-04-30 | 2011-02-22 | S.C. Johnson & Son, Inc. | High volume atomizer for common consumer spray products |
EP2130611B1 (en) | 2008-06-03 | 2010-11-03 | Microflow Engineering SA | Volatile liquid droplet dispenser device |
EP2337600B1 (en) | 2008-09-26 | 2019-09-18 | Stamford Devices Limited | Supplemental oxygen delivery system |
US8006918B2 (en) * | 2008-10-03 | 2011-08-30 | The Proctor & Gamble Company | Alternating current powered delivery system |
US8267081B2 (en) | 2009-02-20 | 2012-09-18 | Baxter International Inc. | Inhaled anesthetic agent therapy and delivery system |
US8985101B2 (en) | 2009-05-21 | 2015-03-24 | Microdose Therapeutx, Inc. | Method and device for clamping a blister within a dry powder inhaler |
CA2762819C (en) * | 2009-05-21 | 2016-12-20 | Microdose Therapeutx, Inc. | Rotary cassette system for dry powder inhaler |
US20110000481A1 (en) * | 2009-07-01 | 2011-01-06 | Anand Gumaste | Nebulizer for infants and respiratory compromised patients |
EP2521584B1 (en) | 2010-01-05 | 2018-10-17 | MicroDose Therapeutx, Inc. | Inhalation device |
US10842951B2 (en) | 2010-01-12 | 2020-11-24 | Aerami Therapeutics, Inc. | Liquid insulin formulations and methods relating thereto |
US8950394B2 (en) * | 2010-01-12 | 2015-02-10 | Dance Biopharm Inc. | Preservative-free single dose inhaler systems |
US9545488B2 (en) | 2010-01-12 | 2017-01-17 | Dance Biopharm Inc. | Preservative-free single dose inhaler systems |
US20130269684A1 (en) | 2012-04-16 | 2013-10-17 | Dance Pharmaceuticals, Inc. | Methods and systems for supplying aerosolization devices with liquid medicaments |
CN103118642B (en) | 2010-07-15 | 2015-09-09 | 艾诺维亚股份有限公司 | Drop formation device |
US10154923B2 (en) | 2010-07-15 | 2018-12-18 | Eyenovia, Inc. | Drop generating device |
AU2011278924B2 (en) | 2010-07-15 | 2015-06-18 | Eyenovia, Inc. | Ophthalmic drug delivery |
EP2593055A1 (en) | 2010-07-15 | 2013-05-22 | Corinthian Ophthalmic, Inc. | Method and system for performing remote treatment and monitoring |
TWI398361B (en) * | 2010-09-20 | 2013-06-11 | Microjet Technology Co Ltd | Method for manufacturing cantilever-type piezoelectric ink jet head |
FR2968582B1 (en) * | 2010-12-08 | 2018-05-25 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | METHOD AND DEVICE FOR GENERATING DROPS OF LOW GENERATING SPEED AND MODULAR GRANULOMETRIC SPECTRUM |
CN103415398B (en) | 2010-12-28 | 2016-08-10 | 斯坦福设备有限公司 | Light limit orifice plate with and preparation method thereof |
US9393336B2 (en) | 2011-07-08 | 2016-07-19 | S. C. Johnson & Son, Inc. | Insert for dispensing a compressed gas product, system with such an insert, and method of dispensing a compressed gas product |
JP6105621B2 (en) | 2011-12-12 | 2017-03-29 | アイノビア,インコーポレイティド | Highly elastic polymer ejector mechanism, ejector apparatus and method of using them |
JP2013230429A (en) * | 2012-04-27 | 2013-11-14 | Sumitomo Chemical Co Ltd | Ultrasonic atomization device |
SI2852391T1 (en) | 2012-05-21 | 2022-04-29 | Insmed Incorporated | Systems for treating pulmonary infections |
CN104350182B (en) | 2012-06-11 | 2020-04-21 | 斯坦福设备有限公司 | Method for producing an orifice plate for a nebulizer |
JP6529438B2 (en) | 2012-11-29 | 2019-06-12 | インスメッド インコーポレイテッド | Stabilized vancomycin formulation |
US9038625B2 (en) | 2013-02-05 | 2015-05-26 | Sheng-Pin Hu | Liquid spray device |
WO2014140765A1 (en) | 2013-03-15 | 2014-09-18 | Trudell Medical International | Ventilator circuit, adapter for use in ventilator circuit and methods for the use thereof |
KR102293018B1 (en) | 2013-04-16 | 2021-08-24 | 댄스 바이오팜 아이엔씨. | Liquid dispensing and methods for dispensing liquids |
US9303330B2 (en) | 2013-06-07 | 2016-04-05 | General Electric Company | Method for manufacturing fluid handling discs with porous mesh plates for use in ultrasonic mesh nebulizers |
GB201312263D0 (en) * | 2013-07-09 | 2013-08-21 | The Technology Partnership Plc | Separable membrane improvements |
US20150136874A1 (en) * | 2013-11-18 | 2015-05-21 | Electronics And Telecommunications Research Institute | Vibrator including mesh structure and manufacturing method thereof |
BR112016013877B1 (en) * | 2013-12-19 | 2021-04-27 | Koninklijke Philips N.V. | SET FOR USE ON A LIQUID DROP APPLIANCE |
EP3466432B1 (en) | 2014-05-15 | 2020-07-08 | Insmed Incorporated | Methods for treating pulmonary non-tuberculous mycobacterial infections |
US10279357B2 (en) | 2014-05-23 | 2019-05-07 | Stamford Devices Limited | Method for producing an aperture plate |
US10307550B2 (en) | 2014-06-09 | 2019-06-04 | Dance Biopharm Inc. | Liquid drug cartridges and associated dispenser |
US10471222B2 (en) | 2014-07-01 | 2019-11-12 | Dance Biopharm Inc. | Aerosolization system with flow restrictor and feedback device |
US10857313B2 (en) | 2014-07-01 | 2020-12-08 | Aerami Therapeutics, Inc. | Liquid nebulization systems and methods |
US11273271B2 (en) | 2014-07-01 | 2022-03-15 | Aerami Therapeutics, Inc. | Aerosolization system with flow restrictor and feedback device |
EP3042772B1 (en) * | 2014-12-22 | 2019-02-06 | Ricoh Company, Ltd. | Liquid droplet forming apparatus |
EP3244851B1 (en) | 2015-01-12 | 2024-10-16 | Bausch + Lomb Ireland Limited | Micro-droplet delivery device |
CN107530372A (en) | 2015-02-25 | 2018-01-02 | 当斯生物制药有限公司 | Liquid insulin formulations and relative method |
JP6866296B2 (en) | 2015-02-27 | 2021-04-28 | ボード オブ リージェンツ, ザ ユニバーシティ オブ テキサス システムBoard Of Regents, The University Of Texas System | Polypeptide treatment and its use |
CN107530701A (en) * | 2015-03-11 | 2018-01-02 | 新加坡科技研究局 | For liquid assigned unit and method |
CN111603643B (en) | 2015-04-02 | 2023-05-23 | 希尔-罗姆服务私人有限公司 | Pressure control of breathing apparatus |
KR20170135862A (en) * | 2015-04-10 | 2017-12-08 | 켄달리온 테라퓨틱스 인코포레이티드 | Piezoelectric dispenser with replaceable ampoules |
GB201518337D0 (en) * | 2015-10-16 | 2015-12-02 | The Technology Partnership Plc | Linear device |
US12042809B2 (en) * | 2015-11-02 | 2024-07-23 | Altria Client Services Llc | Aerosol-generating system comprising a vibratable element |
WO2018071434A1 (en) | 2016-10-11 | 2018-04-19 | Microdose Therapeutx, Inc. | Inhaler and methods of use thereof |
EP3570986A4 (en) | 2017-01-20 | 2020-11-18 | Kedalion Therapeutics, Inc. | Piezoelectric fluid dispenser |
AU2018279940B2 (en) | 2017-06-10 | 2023-12-14 | Eyenovia, Inc. | Methods and devices for handling a fluid and delivering the fluid to the eye |
EP3720397A4 (en) | 2017-12-08 | 2021-08-11 | Kedalion Therapeutics, Inc. | Fluid delivery alignment system |
WO2019191627A1 (en) | 2018-03-30 | 2019-10-03 | Insmed Incorporated | Methods for continuous manufacture of liposomal drug products |
KR20210084453A (en) | 2018-09-10 | 2021-07-07 | 렁 세라퓨틱스, 인크. | Modified peptide fragments of CAV-1 protein and use thereof in the treatment of fibrosis |
US12097145B2 (en) | 2019-03-06 | 2024-09-24 | Bausch + Lomb Ireland Limited | Vented multi-dose ocular fluid delivery system |
US11679028B2 (en) | 2019-03-06 | 2023-06-20 | Novartis Ag | Multi-dose ocular fluid delivery system |
CN115768384A (en) | 2020-04-17 | 2023-03-07 | 科达隆治疗公司 | Fluid power actuated preservative-free dispensing system |
US12090087B2 (en) | 2020-04-17 | 2024-09-17 | Bausch + Lomb Ireland Limited | Hydrodynamically actuated preservative free dispensing system having a collapsible liquid reservoir |
US11938057B2 (en) | 2020-04-17 | 2024-03-26 | Bausch + Lomb Ireland Limited | Hydrodynamically actuated preservative free dispensing system |
CN113019789B (en) * | 2021-03-19 | 2022-02-15 | 大连理工大学 | Wall-separating type feedback jet oscillator |
CN114738648A (en) * | 2022-03-02 | 2022-07-12 | 上海工程技术大学 | Trace lubricating system |
Citations (81)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2101304A (en) * | 1936-06-05 | 1937-12-07 | Sheaffer W A Pen Co | Fountain pen |
US2158615A (en) * | 1937-07-26 | 1939-05-16 | Sheaffer W A Pen Co | Fountain pen |
US2187528A (en) * | 1937-06-07 | 1940-01-16 | Russell T Wing | Fountain pen |
US2223541A (en) * | 1939-01-06 | 1940-12-03 | Parker Pen Co | Fountain pen |
US2283333A (en) * | 1941-05-22 | 1942-05-19 | Sheaffer W A Pen Co | Fountain pen |
US2292381A (en) * | 1940-12-24 | 1942-08-11 | Esterbrook Steel Pen Mfg Co | Fountain pen feed |
US2360297A (en) * | 1944-04-10 | 1944-10-10 | Russell T Wing | Fountain pen |
US2375770A (en) * | 1943-11-19 | 1945-05-15 | Arthur O Dahiberg | Fountain pen |
US2404063A (en) * | 1944-04-27 | 1946-07-16 | Parker Pen Co | Fountain pen |
US2430023A (en) * | 1944-01-27 | 1947-11-04 | Esterbrook Pen Co | Writing implement |
US2474996A (en) * | 1945-10-12 | 1949-07-05 | Sheaffer W A Pen Co | Fountain pen |
US2512004A (en) * | 1945-03-05 | 1950-06-20 | Russell T Wing | Fountain pen |
US2521657A (en) * | 1944-07-07 | 1950-09-05 | Scripto Inc | Fountain pen |
US2681041A (en) * | 1946-06-08 | 1954-06-15 | Parker Pen Co | Fountain pen |
US2779623A (en) * | 1954-09-10 | 1957-01-29 | Bernard J Eisenkraft | Electromechanical atomizer |
US2935970A (en) * | 1955-03-23 | 1960-05-10 | Sapphire Products Inc | Fountain pen ink reservoir |
US3411854A (en) * | 1965-04-30 | 1968-11-19 | Montblanc Simplo Gmbh | Ink conductor for fountain pens |
US3558052A (en) * | 1968-10-31 | 1971-01-26 | F I N D Inc | Method and apparatus for spraying electrostatic dry powder |
US3738574A (en) * | 1971-06-15 | 1973-06-12 | Siemens Ag | Apparatus for atomizing fluids with a piezoelectrically stimulated oscillator system |
US3790079A (en) * | 1972-06-05 | 1974-02-05 | Rnb Ass Inc | Method and apparatus for generating monodisperse aerosol |
US3804329A (en) * | 1973-07-27 | 1974-04-16 | J Martner | Ultrasonic generator and atomizer apparatus and method |
US3812854A (en) * | 1972-10-20 | 1974-05-28 | A Michaels | Ultrasonic nebulizer |
US3950760A (en) * | 1973-12-12 | 1976-04-13 | U.S. Philips Corporation | Device for writing with liquid ink |
US3958249A (en) * | 1974-12-18 | 1976-05-18 | International Business Machines Corporation | Ink jet drop generator |
US3983740A (en) * | 1971-12-07 | 1976-10-05 | Societe Grenobloise D'etudes Et D'applications Hydrauliques (Sogreah) | Method and apparatus for forming a stream of identical drops at very high speed |
US4005435A (en) * | 1975-05-15 | 1977-01-25 | Burroughs Corporation | Liquid jet droplet generator |
US4159803A (en) * | 1977-03-31 | 1979-07-03 | MistO2 Gen Equipment Company | Chamber for ultrasonic aerosol generation |
US4240081A (en) * | 1978-10-13 | 1980-12-16 | Dennison Manufacturing Company | Ink jet printing |
US4261512A (en) * | 1979-02-24 | 1981-04-14 | Boehringer Ingelheim Gmbh | Inhalation aerosol spray device |
US4294407A (en) * | 1978-12-19 | 1981-10-13 | Bosch-Siemens Hausgerate Gmbh | Atomizer for fluids, preferably an inhalation device |
US4300546A (en) * | 1978-11-15 | 1981-11-17 | Carl Heyer Gmbh Inhalationstechnik | Hand-held atomizer especially for dispensing inhalation-administered medicaments |
US4334531A (en) * | 1979-06-19 | 1982-06-15 | Bosch-Siemens Hausgerate Gmbh | Inhalator |
US4336544A (en) * | 1980-08-18 | 1982-06-22 | Hewlett-Packard Company | Method and apparatus for drop-on-demand ink jet printing |
US4338576A (en) * | 1978-07-26 | 1982-07-06 | Tdk Electronics Co., Ltd. | Ultrasonic atomizer unit utilizing shielded and grounded elements |
US4368476A (en) * | 1979-12-19 | 1983-01-11 | Canon Kabushiki Kaisha | Ink jet recording head |
US4389071A (en) * | 1980-12-12 | 1983-06-21 | Hydronautics, Inc. | Enhancing liquid jet erosion |
US4408719A (en) * | 1981-06-17 | 1983-10-11 | Last Anthony J | Sonic liquid atomizer |
US4431136A (en) * | 1980-03-17 | 1984-02-14 | Kraftwerk Union Aktiengesellschaft | Slit nozzle and fast-acting shutoff valve |
US4465234A (en) * | 1980-10-06 | 1984-08-14 | Matsushita Electric Industrial Co., Ltd. | Liquid atomizer including vibrator |
US4474326A (en) * | 1981-11-24 | 1984-10-02 | Tdk Electronics Co., Ltd. | Ultrasonic atomizing device |
US4474251A (en) * | 1980-12-12 | 1984-10-02 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4475113A (en) * | 1981-06-18 | 1984-10-02 | International Business Machines | Drop-on-demand method and apparatus using converging nozzles and high viscosity fluids |
US4479609A (en) * | 1981-10-09 | 1984-10-30 | Matsushita Electric Works, Ltd. | Liquid sprayer |
US4530464A (en) * | 1982-07-14 | 1985-07-23 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic liquid ejecting unit and method for making same |
US4533082A (en) * | 1981-10-15 | 1985-08-06 | Matsushita Electric Industrial Company, Limited | Piezoelectric oscillated nozzle |
US4539575A (en) * | 1983-06-06 | 1985-09-03 | Siemens Aktiengesellschaft | Recorder operating with liquid drops and comprising elongates piezoelectric transducers rigidly connected at both ends with a jet orifice plate |
US4544933A (en) * | 1983-09-20 | 1985-10-01 | Siemens Aktiengesellschaft | Apparatus and method for ink droplet ejection for a printer |
US4546361A (en) * | 1982-10-26 | 1985-10-08 | Ing. C. Olivetti & C., S.P.A. | Ink jet printing method and device |
US4550325A (en) * | 1984-12-26 | 1985-10-29 | Polaroid Corporation | Drop dispensing device |
US4591883A (en) * | 1982-03-31 | 1986-05-27 | Ricoh Company, Ltd. | Ink-jet printer head |
US4593291A (en) * | 1984-04-16 | 1986-06-03 | Exxon Research And Engineering Co. | Method for operating an ink jet device to obtain high resolution printing |
US4605167A (en) * | 1982-01-18 | 1986-08-12 | Matsushita Electric Industrial Company, Limited | Ultrasonic liquid ejecting apparatus |
US4620201A (en) * | 1985-01-14 | 1986-10-28 | Siemens Aktiengesellschaft | Magnetic driver ink jet |
US4628890A (en) * | 1984-08-31 | 1986-12-16 | Freeman Winifer W | Fuel atomizer |
US4632311A (en) * | 1982-12-20 | 1986-12-30 | Matsushita Electric Industrial Co., Ltd. | Atomizing apparatus employing a capacitive piezoelectric transducer |
US4659014A (en) * | 1985-09-05 | 1987-04-21 | Delavan Corporation | Ultrasonic spray nozzle and method |
US4702418A (en) * | 1985-09-09 | 1987-10-27 | Piezo Electric Products, Inc. | Aerosol dispenser |
US4753579A (en) * | 1986-01-22 | 1988-06-28 | Piezo Electric Products, Inc. | Ultrasonic resonant device |
US4790479A (en) * | 1984-09-07 | 1988-12-13 | Omron Tateisi Electronics Co. | Oscillating construction for an ultrasonic atomizer inhaler |
US4793339A (en) * | 1984-08-29 | 1988-12-27 | Omron Tateisi Electronics Co. | Ultrasonic atomizer and storage bottle and nozzle therefor |
US4796807A (en) * | 1987-03-17 | 1989-01-10 | Lechler Gmbh & C. Kg | Ultrasonic atomizer for liquids |
US4799622A (en) * | 1986-08-05 | 1989-01-24 | Tao Nenryo Kogyo Kabushiki Kaisha | Ultrasonic atomizing apparatus |
US4828886A (en) * | 1986-11-05 | 1989-05-09 | U.S. Philips Corporation | Method of applying small drop-shaped quantities of melted solder from a nozzle to surfaces to be wetted and device for carrying out the method |
US4850534A (en) * | 1987-05-30 | 1989-07-25 | Tdk Corporation | Ultrasonic wave nebulizer |
US4865006A (en) * | 1987-03-20 | 1989-09-12 | Hitachi, Ltd. | Liquid atomizer |
US4888516A (en) * | 1987-07-22 | 1989-12-19 | Siemens Aktiengesellschaft | Piezoelectrically excitable resonance system |
US5021701A (en) * | 1988-10-20 | 1991-06-04 | Tdk Corporation | Piezoelectric vibrator mounting system for a nebulizer |
US5063396A (en) * | 1989-03-14 | 1991-11-05 | Seiko Epson Corporation | Droplets jetting device |
US5129579A (en) * | 1990-10-25 | 1992-07-14 | Sun Microsystems, Inc. | Vacuum attachment for electronic flux nozzle |
US5152456A (en) * | 1989-12-12 | 1992-10-06 | Bespak, Plc | Dispensing apparatus having a perforate outlet member and a vibrating device |
US5164740A (en) * | 1991-04-24 | 1992-11-17 | Yehuda Ivri | High frequency printing mechanism |
US5198157A (en) * | 1990-08-20 | 1993-03-30 | Dynamad S. A. R. L. | Ultrasonic device for the continuous production of particles |
US5297734A (en) * | 1990-10-11 | 1994-03-29 | Toda Koji | Ultrasonic vibrating device |
US5299739A (en) * | 1991-05-27 | 1994-04-05 | Tdk Corporation | Ultrasonic wave nebulizer |
US5518179A (en) * | 1991-12-04 | 1996-05-21 | The Technology Partnership Limited | Fluid droplets production apparatus and method |
US5586550A (en) * | 1995-08-31 | 1996-12-24 | Fluid Propulsion Technologies, Inc. | Apparatus and methods for the delivery of therapeutic liquids to the respiratory system |
US5758637A (en) * | 1995-08-31 | 1998-06-02 | Aerogen, Inc. | Liquid dispensing apparatus and methods |
US5938117A (en) * | 1991-04-24 | 1999-08-17 | Aerogen, Inc. | Methods and apparatus for dispensing liquids as an atomized spray |
US6085740A (en) * | 1996-02-21 | 2000-07-11 | Aerogen, Inc. | Liquid dispensing apparatus and methods |
US6629646B1 (en) * | 1991-04-24 | 2003-10-07 | Aerogen, Inc. | Droplet ejector with oscillating tapered aperture |
US6732944B2 (en) * | 2001-05-02 | 2004-05-11 | Aerogen, Inc. | Base isolated nebulizing device and methods |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB973458A (en) | 1962-10-16 | 1964-10-28 | Exxon Research Engineering Co | Improvements in or relating to methods and apparatus for atomising liquids |
AT323114B (en) | 1973-05-07 | 1975-06-25 | Voest Ag | PROCEDURE FOR PRILLING |
US4402458A (en) | 1980-04-12 | 1983-09-06 | Battelle-Institut E.V. | Apparatus for atomizing liquids |
JPS5723852A (en) | 1980-07-18 | 1982-02-08 | Shimadzu Corp | Electrophoretic measuring device |
FR2490014A1 (en) * | 1980-09-11 | 1982-03-12 | Scavennec Andre | EMITTER-BASE HETEROJUNCTION PHOTOTRANSISTOR WITH TRANSMITTER LAYER LOCALLY OF REVERSE TYPE |
JPS57105608A (en) | 1980-12-22 | 1982-07-01 | Matsushita Electric Ind Co Ltd | Atomizer |
DE3229921A1 (en) | 1982-08-11 | 1984-02-16 | Linde Ag, 6200 Wiesbaden | METHOD FOR THE SIMULTANEOUS FILLING OF SEVERAL ACETYLENE-FILLED BOTTLES OF SOLVENTS |
JPS604174A (en) | 1983-06-22 | 1985-01-10 | Toyo Soda Mfg Co Ltd | Separation of nucleotide from nucleic acid base and nucleoside |
JPS604714A (en) | 1983-06-23 | 1985-01-11 | Matsushita Electric Ind Co Ltd | Atomization device |
EP0134847B1 (en) | 1983-08-02 | 1987-05-27 | Trutek Research Inc. | Inhalation valve |
JPS6041074A (en) | 1983-08-16 | 1985-03-04 | Fuji Xerox Co Ltd | Cleaning device of magnetic image forming device |
JPS618357A (en) | 1984-06-22 | 1986-01-16 | Toshiba Corp | Dot printer |
JPS6183057A (en) | 1985-01-30 | 1986-04-26 | Mitsubishi Electric Corp | Apparatus for preparing thermal head |
JPS61215059A (en) | 1985-03-22 | 1986-09-24 | Toshiba Corp | Ink jet recording apparatus |
DE3524701A1 (en) | 1985-07-11 | 1987-01-15 | Bosch Gmbh Robert | ULTRASONIC SPRAYER NOZZLE |
US4871489A (en) * | 1986-10-07 | 1989-10-03 | Corning Incorporated | Spherical particles having narrow size distribution made by ultrasonic vibration |
JP2685847B2 (en) | 1988-11-15 | 1997-12-03 | 松下電工株式会社 | Ultrasonic atomizer |
JP2888437B2 (en) | 1989-01-14 | 1999-05-10 | 松下電工株式会社 | Ultrasonic atomizer |
EP0563120B1 (en) | 1990-12-17 | 1997-10-01 | Minnesota Mining And Manufacturing Company | Inhaler |
WO1993001404A1 (en) | 1991-07-08 | 1993-01-21 | Yehuda Ivri | Ultrasonic fluid ejector |
JPH067721A (en) | 1992-06-26 | 1994-01-18 | Koji Toda | Ultrasonic spraying apparatus |
-
1993
- 1993-12-07 US US08/163,850 patent/US6629646B1/en not_active Expired - Lifetime
-
2003
- 2003-05-02 US US10/428,256 patent/US6926208B2/en not_active Expired - Fee Related
-
2005
- 2005-05-09 US US11/125,812 patent/US7108197B2/en not_active Expired - Fee Related
-
2006
- 2006-09-18 US US11/532,602 patent/US20070075161A1/en not_active Abandoned
Patent Citations (86)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2101304A (en) * | 1936-06-05 | 1937-12-07 | Sheaffer W A Pen Co | Fountain pen |
US2187528A (en) * | 1937-06-07 | 1940-01-16 | Russell T Wing | Fountain pen |
US2158615A (en) * | 1937-07-26 | 1939-05-16 | Sheaffer W A Pen Co | Fountain pen |
US2223541A (en) * | 1939-01-06 | 1940-12-03 | Parker Pen Co | Fountain pen |
US2292381A (en) * | 1940-12-24 | 1942-08-11 | Esterbrook Steel Pen Mfg Co | Fountain pen feed |
US2283333A (en) * | 1941-05-22 | 1942-05-19 | Sheaffer W A Pen Co | Fountain pen |
US2375770A (en) * | 1943-11-19 | 1945-05-15 | Arthur O Dahiberg | Fountain pen |
US2430023A (en) * | 1944-01-27 | 1947-11-04 | Esterbrook Pen Co | Writing implement |
US2360297A (en) * | 1944-04-10 | 1944-10-10 | Russell T Wing | Fountain pen |
US2404063A (en) * | 1944-04-27 | 1946-07-16 | Parker Pen Co | Fountain pen |
US2521657A (en) * | 1944-07-07 | 1950-09-05 | Scripto Inc | Fountain pen |
US2512004A (en) * | 1945-03-05 | 1950-06-20 | Russell T Wing | Fountain pen |
US2474996A (en) * | 1945-10-12 | 1949-07-05 | Sheaffer W A Pen Co | Fountain pen |
US2681041A (en) * | 1946-06-08 | 1954-06-15 | Parker Pen Co | Fountain pen |
US2779623A (en) * | 1954-09-10 | 1957-01-29 | Bernard J Eisenkraft | Electromechanical atomizer |
US2935970A (en) * | 1955-03-23 | 1960-05-10 | Sapphire Products Inc | Fountain pen ink reservoir |
US3411854A (en) * | 1965-04-30 | 1968-11-19 | Montblanc Simplo Gmbh | Ink conductor for fountain pens |
US3558052A (en) * | 1968-10-31 | 1971-01-26 | F I N D Inc | Method and apparatus for spraying electrostatic dry powder |
US3738574A (en) * | 1971-06-15 | 1973-06-12 | Siemens Ag | Apparatus for atomizing fluids with a piezoelectrically stimulated oscillator system |
US3983740A (en) * | 1971-12-07 | 1976-10-05 | Societe Grenobloise D'etudes Et D'applications Hydrauliques (Sogreah) | Method and apparatus for forming a stream of identical drops at very high speed |
US3790079A (en) * | 1972-06-05 | 1974-02-05 | Rnb Ass Inc | Method and apparatus for generating monodisperse aerosol |
US3812854A (en) * | 1972-10-20 | 1974-05-28 | A Michaels | Ultrasonic nebulizer |
US3804329A (en) * | 1973-07-27 | 1974-04-16 | J Martner | Ultrasonic generator and atomizer apparatus and method |
US3950760A (en) * | 1973-12-12 | 1976-04-13 | U.S. Philips Corporation | Device for writing with liquid ink |
US3958249A (en) * | 1974-12-18 | 1976-05-18 | International Business Machines Corporation | Ink jet drop generator |
US4005435A (en) * | 1975-05-15 | 1977-01-25 | Burroughs Corporation | Liquid jet droplet generator |
US4159803A (en) * | 1977-03-31 | 1979-07-03 | MistO2 Gen Equipment Company | Chamber for ultrasonic aerosol generation |
US4338576A (en) * | 1978-07-26 | 1982-07-06 | Tdk Electronics Co., Ltd. | Ultrasonic atomizer unit utilizing shielded and grounded elements |
US4240081A (en) * | 1978-10-13 | 1980-12-16 | Dennison Manufacturing Company | Ink jet printing |
US4300546A (en) * | 1978-11-15 | 1981-11-17 | Carl Heyer Gmbh Inhalationstechnik | Hand-held atomizer especially for dispensing inhalation-administered medicaments |
US4294407A (en) * | 1978-12-19 | 1981-10-13 | Bosch-Siemens Hausgerate Gmbh | Atomizer for fluids, preferably an inhalation device |
US4261512A (en) * | 1979-02-24 | 1981-04-14 | Boehringer Ingelheim Gmbh | Inhalation aerosol spray device |
US4334531A (en) * | 1979-06-19 | 1982-06-15 | Bosch-Siemens Hausgerate Gmbh | Inhalator |
US4368476A (en) * | 1979-12-19 | 1983-01-11 | Canon Kabushiki Kaisha | Ink jet recording head |
US4431136A (en) * | 1980-03-17 | 1984-02-14 | Kraftwerk Union Aktiengesellschaft | Slit nozzle and fast-acting shutoff valve |
US4336544A (en) * | 1980-08-18 | 1982-06-22 | Hewlett-Packard Company | Method and apparatus for drop-on-demand ink jet printing |
US4465234A (en) * | 1980-10-06 | 1984-08-14 | Matsushita Electric Industrial Co., Ltd. | Liquid atomizer including vibrator |
US4389071A (en) * | 1980-12-12 | 1983-06-21 | Hydronautics, Inc. | Enhancing liquid jet erosion |
US4681264A (en) * | 1980-12-12 | 1987-07-21 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4474251A (en) * | 1980-12-12 | 1984-10-02 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4408719A (en) * | 1981-06-17 | 1983-10-11 | Last Anthony J | Sonic liquid atomizer |
US4475113A (en) * | 1981-06-18 | 1984-10-02 | International Business Machines | Drop-on-demand method and apparatus using converging nozzles and high viscosity fluids |
US4479609A (en) * | 1981-10-09 | 1984-10-30 | Matsushita Electric Works, Ltd. | Liquid sprayer |
US4533082A (en) * | 1981-10-15 | 1985-08-06 | Matsushita Electric Industrial Company, Limited | Piezoelectric oscillated nozzle |
US4474326A (en) * | 1981-11-24 | 1984-10-02 | Tdk Electronics Co., Ltd. | Ultrasonic atomizing device |
US4605167A (en) * | 1982-01-18 | 1986-08-12 | Matsushita Electric Industrial Company, Limited | Ultrasonic liquid ejecting apparatus |
US4591883A (en) * | 1982-03-31 | 1986-05-27 | Ricoh Company, Ltd. | Ink-jet printer head |
US4530464A (en) * | 1982-07-14 | 1985-07-23 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic liquid ejecting unit and method for making same |
US4546361A (en) * | 1982-10-26 | 1985-10-08 | Ing. C. Olivetti & C., S.P.A. | Ink jet printing method and device |
US4632311A (en) * | 1982-12-20 | 1986-12-30 | Matsushita Electric Industrial Co., Ltd. | Atomizing apparatus employing a capacitive piezoelectric transducer |
US4539575A (en) * | 1983-06-06 | 1985-09-03 | Siemens Aktiengesellschaft | Recorder operating with liquid drops and comprising elongates piezoelectric transducers rigidly connected at both ends with a jet orifice plate |
US4544933A (en) * | 1983-09-20 | 1985-10-01 | Siemens Aktiengesellschaft | Apparatus and method for ink droplet ejection for a printer |
US4593291A (en) * | 1984-04-16 | 1986-06-03 | Exxon Research And Engineering Co. | Method for operating an ink jet device to obtain high resolution printing |
US4793339A (en) * | 1984-08-29 | 1988-12-27 | Omron Tateisi Electronics Co. | Ultrasonic atomizer and storage bottle and nozzle therefor |
US4628890A (en) * | 1984-08-31 | 1986-12-16 | Freeman Winifer W | Fuel atomizer |
US4790479A (en) * | 1984-09-07 | 1988-12-13 | Omron Tateisi Electronics Co. | Oscillating construction for an ultrasonic atomizer inhaler |
US4550325A (en) * | 1984-12-26 | 1985-10-29 | Polaroid Corporation | Drop dispensing device |
US4620201A (en) * | 1985-01-14 | 1986-10-28 | Siemens Aktiengesellschaft | Magnetic driver ink jet |
US4659014A (en) * | 1985-09-05 | 1987-04-21 | Delavan Corporation | Ultrasonic spray nozzle and method |
US4702418A (en) * | 1985-09-09 | 1987-10-27 | Piezo Electric Products, Inc. | Aerosol dispenser |
US4753579A (en) * | 1986-01-22 | 1988-06-28 | Piezo Electric Products, Inc. | Ultrasonic resonant device |
US4799622A (en) * | 1986-08-05 | 1989-01-24 | Tao Nenryo Kogyo Kabushiki Kaisha | Ultrasonic atomizing apparatus |
US4828886A (en) * | 1986-11-05 | 1989-05-09 | U.S. Philips Corporation | Method of applying small drop-shaped quantities of melted solder from a nozzle to surfaces to be wetted and device for carrying out the method |
US4796807A (en) * | 1987-03-17 | 1989-01-10 | Lechler Gmbh & C. Kg | Ultrasonic atomizer for liquids |
US4865006A (en) * | 1987-03-20 | 1989-09-12 | Hitachi, Ltd. | Liquid atomizer |
US4850534A (en) * | 1987-05-30 | 1989-07-25 | Tdk Corporation | Ultrasonic wave nebulizer |
US4888516A (en) * | 1987-07-22 | 1989-12-19 | Siemens Aktiengesellschaft | Piezoelectrically excitable resonance system |
US5021701A (en) * | 1988-10-20 | 1991-06-04 | Tdk Corporation | Piezoelectric vibrator mounting system for a nebulizer |
US5063396A (en) * | 1989-03-14 | 1991-11-05 | Seiko Epson Corporation | Droplets jetting device |
US5261601A (en) * | 1989-12-12 | 1993-11-16 | Bespak Plc | Liquid dispensing apparatus having a vibrating perforate membrane |
US5152456A (en) * | 1989-12-12 | 1992-10-06 | Bespak, Plc | Dispensing apparatus having a perforate outlet member and a vibrating device |
US5198157A (en) * | 1990-08-20 | 1993-03-30 | Dynamad S. A. R. L. | Ultrasonic device for the continuous production of particles |
US5297734A (en) * | 1990-10-11 | 1994-03-29 | Toda Koji | Ultrasonic vibrating device |
US5129579A (en) * | 1990-10-25 | 1992-07-14 | Sun Microsystems, Inc. | Vacuum attachment for electronic flux nozzle |
US6629646B1 (en) * | 1991-04-24 | 2003-10-07 | Aerogen, Inc. | Droplet ejector with oscillating tapered aperture |
US5938117A (en) * | 1991-04-24 | 1999-08-17 | Aerogen, Inc. | Methods and apparatus for dispensing liquids as an atomized spray |
US6540153B1 (en) * | 1991-04-24 | 2003-04-01 | Aerogen, Inc. | Methods and apparatus for dispensing liquids as an atomized spray |
US5164740A (en) * | 1991-04-24 | 1992-11-17 | Yehuda Ivri | High frequency printing mechanism |
US6921020B2 (en) * | 1991-04-24 | 2005-07-26 | Aerogen, Inc. | Method and apparatus for dispensing liquids as an atomized spray |
US6926208B2 (en) * | 1991-04-24 | 2005-08-09 | Aerogen, Inc. | Droplet ejector with oscillating tapered aperture |
US5299739A (en) * | 1991-05-27 | 1994-04-05 | Tdk Corporation | Ultrasonic wave nebulizer |
US5518179A (en) * | 1991-12-04 | 1996-05-21 | The Technology Partnership Limited | Fluid droplets production apparatus and method |
US5586550A (en) * | 1995-08-31 | 1996-12-24 | Fluid Propulsion Technologies, Inc. | Apparatus and methods for the delivery of therapeutic liquids to the respiratory system |
US5758637A (en) * | 1995-08-31 | 1998-06-02 | Aerogen, Inc. | Liquid dispensing apparatus and methods |
US6085740A (en) * | 1996-02-21 | 2000-07-11 | Aerogen, Inc. | Liquid dispensing apparatus and methods |
US6732944B2 (en) * | 2001-05-02 | 2004-05-11 | Aerogen, Inc. | Base isolated nebulizing device and methods |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9108211B2 (en) | 2005-05-25 | 2015-08-18 | Nektar Therapeutics | Vibration systems and methods |
US20080286679A1 (en) * | 2007-05-16 | 2008-11-20 | Ricoh Company, Ltd. | Toner preparation method and apparatus, and toner prepared thereby |
EP1992994A3 (en) * | 2007-05-16 | 2009-07-22 | Ricoh Company, Ltd. | Toner preparation method and apparatus, and toner prepared thereby |
US8568628B2 (en) | 2007-05-16 | 2013-10-29 | Ricoh Company, Ltd. | Toner preparation method and apparatus, and toner prepared thereby |
US8967493B2 (en) | 2010-06-15 | 2015-03-03 | Aptar Radolfzell Gmbh | Atomizing device |
US9068566B2 (en) | 2011-01-21 | 2015-06-30 | Biodot, Inc. | Piezoelectric dispenser with a longitudinal transducer and replaceable capillary tube |
CN103619598A (en) * | 2011-04-19 | 2014-03-05 | 伊斯曼柯达公司 | Continuous ejection system including compliant membrane transducer |
US11679194B2 (en) | 2021-04-27 | 2023-06-20 | Contego Medical, Inc. | Thrombus aspiration system and methods for controlling blood loss |
US11679195B2 (en) | 2021-04-27 | 2023-06-20 | Contego Medical, Inc. | Thrombus aspiration system and methods for controlling blood loss |
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Also Published As
Publication number | Publication date |
---|---|
US20030226906A1 (en) | 2003-12-11 |
US20050263608A1 (en) | 2005-12-01 |
US6629646B1 (en) | 2003-10-07 |
US7108197B2 (en) | 2006-09-19 |
US6926208B2 (en) | 2005-08-09 |
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Legal Events
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Owner name: NOVARTIS PHARMA AG, SWITZERLAND Free format text: ASSIGNMENT OF PATENT RIGHTS;ASSIGNOR:AEROGEN, INC.;REEL/FRAME:022062/0905 Effective date: 20081231 Owner name: NOVARTIS PHARMA AG,SWITZERLAND Free format text: ASSIGNMENT OF PATENT RIGHTS;ASSIGNOR:AEROGEN, INC.;REEL/FRAME:022062/0905 Effective date: 20081231 |
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