Ultrasonic mist inhaler

Abstract

The invention relates to an ultrasonic mist inhaler, comprising a liquid reservoir structure comprising a liquid chamber adapted to receive liquid to be atomized, a sonication chamber in fluid communication with the liquid chamber; wherein the liquid reservoir structure comprises the sonication chamber as depicted in Figure 3.

Description

(19) *EP004755215A2* (11) EP 4 755 215 A2 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: 10.06.2026 Bulletin 2026 / 24 (21) Application number: 26173479.2 (22) Date of filing: 15.12.2019 (51) International Patent Classification (IPC): A24F 40 / 42 (2020.01) (52) Cooperative Patent Classification (CPC): A24F 40 / 05; A61M 11 / 005; A61M 15 / 0085; A61M 15 / 06; B05B 17 / 0684; A24F 40 / 10; A61M 15 / 0021; A61M 2016 / 0018; A61M 2205 / 3331; A61M 2205 / 8206 (84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (62) Document number(s) of the earlier application(s) in accordance with Art. 76 EPC: 19956956.7 / 4 031 218 (71) Applicant: Shaheen Innovations Holding Limited Al Maryah Island Abu Dhabi (AE) (72) Inventors: • ALSHAIBA SALEH GHANNAM ALMAZROUEI, Mohammed Abu Dhabi (AE) • The other inventor has waived his right to be thus mentioned. (74) Representative: Forresters IP LLP Skygarden Erika-Mann-Straße 11 80636 München (DE) Remarks: This application was filed on 20.04.2026 as a divisional application to the application mentioned under INID code 62. (54) ULTRASONIC MIST INHALER (57) The invention relates to an ultrasonic mist in- haler, comprisinga liquid reservoir structure comprisinga liquid chamber adapted to receive liquid tobeatomized, a sonication chamber in fluid communicationwith the liquid chamber; wherein the liquid reservoir structure com- prises the sonication chamber as depicted in Figure 3. EP 4 75 5 21 5 A 2 Processed by Luminess, 75001 PARIS (FR) 2 1 EP 4 755 215 A2 2 Description FIELD OF THE DISCLOSED TECHNOLOGY

[0001] The invention relates to an ultrasonic mist in- haler for atomizing a liquid by ultrasonic vibrations. BACKGROUND

[0002] Electronic vaporizing inhalers are becoming popular among smokers who also want to avoid the tar and other harsh chemicals associated with traditional cigarettes andwhowish to satisfy the craving for nicotine. Electronic vaporizing inhalers may contain liquid nico- tine, which is typically a mixture of nicotine oil, a solvent, water, and often flavoring. When the user draws, or inhales, on the electronic vaporizing inhaler, the liquid nicotine is drawn into a vaporizer where it is heated into a vapor. As the user draws on the electronic vaporizing inhaler, the vapor containing the nicotine is inhaled. Such electronic vaporizing inhalers may have medical pur- pose.

[0003] Electronic vaporizing inhalers and other vapor inhalers typically have similar designs. Most electronic vaporizing inhalers feature a liquid nicotine reservoir with an interior membrane, such as a capillary element, typi- cally cotton, that holds the liquid nicotine so as to prevent leaking from the reservoir. Nevertheless, these cigar- ettes are still prone to leaking because there is no ob- stacle to prevent the liquid from flowing out of the mem- brane and into the mouthpiece. A leaking electronic vaporizing inhaler is problematic for several reasons. As a first disadvantage, the liquid can leak into the electronic components, which can cause serious da- mage to the device. As a second disadvantage, the liquid can leak into the electronic vaporizing inhaler mouth- piece, and the user may inhale the unvaporized liquid.

[0004] Electronic vaporizing inhalers are also known for providing inconsistent doses between draws. The aforementioned leaking is one cause of inconsistent doses because the membrane may be oversaturated or undersaturated near the vaporizer. If the membrane is oversaturated, then the user may experience a stron- ger than desired dose of vapor, and if the membrane is undersaturated, then the user may experience a weaker thandesireddoseof vapor.Additionally, small changes in the strength of the user’s draw may provide stronger or weaker doses. Inconsistent dosing, along with leaking, can lead to faster consumption of the vaping liquid.

[0005] Additionally, conventional electronic vaporizing inhalers tend to rely on inducing high temperatures of a metal heating component configured to heat a liquid in the e-cigarette, thus vaporizing the liquid that can be breathed in. Problems with conventional electronic va- porizing inhalers may include the possibility of burning metal andsubsequent breathing inof themetal alongwith theburnt liquid. Inaddition, somemaynot prefer theburnt smell caused by the heated liquid.

[0006] Electronic vaporizing inhalers are generally de- signed so that the liquid nicotine reservoir is arranged away from themetal heating component to prevent heat- ing the unused liquid in the reservoir. This arrangement makes the inhaler device cumbersome and more com- plex to produce.

[0007] Thus, a need exists in the art for an electronic vaporizing inhaler that is better able to withstand these disadvantages. BRIEF SUMMARY

[0008] The invention is defined by claim 1 of the ap- pended claims. Preferred embodiments are defined in the dependent claims.

[0009] According to someexamples, anultrasonicmist inhaler, comprises: - a liquid reservoir structure comprising a liquid cham- ber adapted to receive liquid to be atomized, - asonication chamber in fluid communicationwith the liquid chamber, wherein the liquid reservoir structure comprises the so- nication chamber.

[0010] Usinga sonication chamber for ultrasonic vibra- tions in an ultrasonic mist inhaler allows the combination of the liquid chamber and the sonication chamber into the liquid reservoir structure.

[0011] It is noted that the expression "mist" used in the invention means the liquid is not heated as usually in traditional inhalers known from the prior art. In fact, traditional inhalers use heating elements to heat the liquid above its boiling temperature to produce a vapor, which is different from a mist.

[0012] In fact, when sonicating liquids at high intensi- ties, the soundwaves that propagate into the liquidmedia result in alternating high-pressure (compression) and low-pressure (rarefaction) cycles, at different rates de- pending on the frequency.During the low-pressure cycle, high-intensity ultrasonic waves create small vacuum bubbles or voids in the liquid. When the bubbles attain a volumeatwhich they canno longer absorb energy, they collapse violently during a high-pressure cycle. This phenomenon is termed cavitation. During the implosion very high pressures are reached locally. At cavitation, broken capillary waves are generated, and tiny droplets break the surface tension of the liquid and are quickly released into the air, taking mist form.

[0013] In the ultrasonicmist inhaler, the liquid reservoir structure may comprise an internal bore providing an air passage from the sonication chamber toward the sur- roundings.

[0014] In the ultrasonicmist inhaler, the liquid reservoir structure may comprise a peripheral inner chamber ar- rangedbetween the liquid chamber and the internal bore, the peripheral inner chamber providing the fluid commu- 5 10 15 20 25 30 35 40 45 50 55 3 3 EP 4 755 215 A2 4 nication between the liquid chamber and the sonication chamber.

[0015] In the ultrasonicmist inhaler, the liquid reservoir structure may be made in one piece.

[0016] In the ultrasonic mist inhaler, the peripheral inner chamber may comprise an inner wall delimiting the peripheral inner chamber and the liquid chamber.

[0017] In the ultrasonic mist inhaler, the peripheral inner chamber may comprise an outer wall delimiting the peripheral inner chamber and the liquid chamber.

[0018] In the ultrasonic mist inhaler, the outer wall may comprise at least an aperture providing fluid communica- tion between the liquid chamber and the peripheral inner chamber.

[0019] In the ultrasonic mist inhaler, the peripheral inner chamber may comprise a circular opening provid- ing fluid communication between the peripheral inner chamber and the sonication chamber.

[0020] In the ultrasonic mist inhaler, the inner wall may extend in the sonication chamber.

[0021] In theultrasonicmist inhaler, a capillary element may be arranged between the liquid chamber and the sonication chamber.

[0022] In the ultrasonic mist inhaler, the peripheral inner chamber may comprise the capillary element.

[0023] Such arrangement of the capillary element forms a wick and prevents uncontrolled leaking of liquid out of the liquid chamber.

[0024] Preferably, thecapillaryelement iswrapped into the peripheral inner chamber around the internal bore.

[0025] The capillary element may be a gauze. The capillary element may be formed of bamboo fibers, pre- ferably in 100% bamboo fibers, or cotton, silica, tobacco cotton, or any combination of such material.

[0026] In the ultrasonic mist inhaler, the capillary ele- ment may have a U-shape cross section.

[0027] In the ultrasonic mist inhaler, the capillary ele- ment may insert into the peripheral inner chamber from the circular opening.

[0028] In the ultrasonic mist inhaler, the sonication chamber comprises means of ultrasonic vibrations.

[0029] Theexpression "meansof ultrasonic vibrations" is similar to the expression "ultrasonic oscillation compo- nent" used in thepatentapplicationPCT / IB2019 / 055192.

[0030] Preferably, the two lateral portion of the U- shape cross section are inserted into peripheral inner chamber and the central portion is in surface contact with the means of ultrasonic vibrations.

[0031] In the ultrasonic mist inhaler, the circular open- ing of the peripheral inner chamber may face the means of ultrasonic vibrations.

[0032] In the ultrasonic mist inhaler, the means of ultrasonic vibrationsaresupportedbyanelasticmember.

[0033] The elastic member is formed from an annular plate-shaped rubber.

[0034] Theelasticmember hasan inner holewherein a groove is designed for maintaining the means of ultra- sonic vibrations.

[0035] In this case, since the elastic member is in line contact with the means of ultrasonic vibrations, suppres- sion of vibrations of the liquid reservoir structure can more effectively be prevented. Thus, fine particles of the liquid atomized by the atomizing member can be sprayed farther.

[0036] In the ultrasonic mist inhaler, a high-frequency voltage may be applied to the means of ultrasonic vibra- tions to ultrasonically vibrate the means of ultrasonic vibrations, whereby a liquid supplied to a portion of the means of ultrasonic vibrations can be atomized and sprayed.

[0037] According to the ultrasonic mist inhaler, fine particles of the liquid atomized by themeans of ultrasonic vibrations having a relatively small size can be sprayed farther.

[0038] Such means of ultrasonic vibrations may be a transducer preferably designed in a circular plate-shape. The material of the piezoelectric transducer is preferably in ceramic.

[0039] In the ultrasonic mist inhaler, the internal bore may have a mechanical spring.

[0040] Preferably, the mechanical spring pushes the central portion of the capillary element onto themeans of ultrasonic vibrations to ensure the surface contact.

[0041] In the ultrasonic mist inhaler, the sonication chamber may have a bottom plate closing the sonication chamber.

[0042] In the ultrasonic mist inhaler, the bottom plate may be configured to support the elastic member.

[0043] In the ultrasonic mist inhaler, the bottom plate may be arranged to receive connectors for powering the means of ultrasonic vibrations.

[0044] In the ultrasonic mist inhaler, a first connector and a second connector, the first connector is a spring- loaded contact probe and the second connector is a side pin crossing the elasticmember. A spring-loaded contact probe provides a permanent contact with the means of ultrasonic vibrations.

[0045] Preferably, ametal plate ensures electrical con- tact between the second connector and the means of ultrasonic vibrations.

[0046] In the ultrasonicmist inhaler, the liquid reservoir structure may have a top end comprising an airway fluidically coupled to the internal bore and configured to allow liquid mist to flow out of the airway.

[0047] In the ultrasonicmist inhaler, the liquid reservoir structure may be arranged between a mouthpiece and a casing housing electrical components for powering and operating the inhaler.

[0048] The bottom plate is sealed, thus preventing leakage of liquid from the sonication chamber to the casing.

[0049] In the ultrasonic mist inhaler, the top end of the liquid reservoir structuremay be coupled with themouth- piece, the mouthpiece being configured to allow suction of liquidmist flowingout of theairway to thesurroundings.

[0050] Advantageously, the liquid reservoir structure is 5 10 15 20 25 30 35 40 45 50 55 4 5 EP 4 755 215 A2 6 detachable from the mouthpiece and the casing.

[0051] The liquid reservoir structure and the mouth- piece or the casing may include complimentary arrange- ments for engaging with one another; further such com- plimentary arrangements may include; a bayonet type arrangement; a threaded engaged type arrangement; a magnetic arrangement; and, a friction fit arrangement; wherein the liquid reservoir structure includes aportion of the arrangement and the mouthpiece or the casing in- cludes the complimentary portion of the arrangement.

[0052] Such design permits the liquid reservoir struc- ture to be disposable. The liquid reservoir structure may be removed and reinstalled when required; a feature that gives the user the freedom to interchange flavors without the limitation of either completely using or having to discard unused liquid.

[0053] Further, such design eliminates the risk of fati- gueof themeansof ultrasonic vibrations in the sonication chamber and has a disposable means of ultrasonic vi- brations which prevents the risk of fatigue and a dispo- sable capillary element which prevents the risk of mixing flavor.

[0054] In the ultrasonic mist inhaler, an integrated cir- cuit may be coupled to the bottom end of the liquid reservoir structure and communicatively coupled to the means of ultrasonic vibrations, the integrated circuit con- figured to cause the means of ultrasonic vibrations to vibrate.

[0055] Preferably, themeans of ultrasonic vibrations is in electrical communication with an integrated circuit, preferably via the connectors.

[0056] Advantageously, the integrated circuit is de- signed to convert a direct current into an alternate current at high frequency.

[0057] The means of ultrasonic vibrations may be powered from electrical components of the casing through the connectors.

[0058] Preferably, the casing is configured to contain an electrical storage device and may encase at least a portion of the integrated circuit.

[0059] The casing may have all features described in the patent application PCT / IB2019 / 055192.

[0060] The ultrasonic mist inhaler according to the invention, wherein said liquid to be received in the liquid chamber comprises 57‑70 % (w / w) vegetable glycerin and 30‑43% (w / w) propylene glycol, said propylene gly- col including nicotine and flavorings.

[0061] An ultrasonic mist inhaler or a personal ultra- sonic atomizer device, comprising: - a liquid reservoir structure comprising a liquid cham- ber or cartridge adapted to receive liquid to be ato- mized, - asonication chamber in fluid communicationwith the liquid chamber or cartridge, wherein said liquid to be received in the liquid chamber comprises 57‑70% (w / w) vegetable glycerin and30‑43% (w / w) propylene glycol, said propylene glycol including nicotine and flavorings. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Some embodiments are illustrated by way of example and not limitation in the figures of the accom- panying drawings. FIG. 1 is an exploded view of components of the ultrasonic mist inhaler according to an embodiment of the invention. FIG. 2 is an exploded view of components of the inhaler liquid reservoir structure according to an embodiment of the invention. FIG. 3 is a cross-section view of components of the inhaler liquid reservoir structure according to figure 1. DETAILED DESCRIPTION

[0063] The foregoing summary, aswell as the following detailed description of certain embodiments of the pre- sent invention, will be better understood when read in conjunction with the appended drawings.

[0064] As used herein, an element recited in the sin- gular and preceded with the word "a" or "an" should be understood as not excluding plural of said elements, unless such exclusion is explicitly stated. Furthermore, the references to "one embodiment" of the present in- vention are not intended to be interpreted as excluding the existence of additional embodiments that also incor- porate the recited features. Moreover, unless explicitly stated to the contrary, embodiments "comprising" or "having" an element or a plurality of elements having a particular propertymay include additional such elements not having that property.

[0065] The present invention is directed to an ultraso- nic mist inhaler. The description of the invention and accompanying figures will be directed to the electronic vaporizing inhaler embodiment; however, other embodi- ments are envisioned, such as an inhaler for hookah, flavored liquids, medicine, and herbal supplements. Ad- ditionally, the device can be packaged to look like an object other than a cigarette. For instance, the device could resemble another smoking instrument, such as a pipe, water pipe, or slide, or the device could resemble another non-smoking related object.

[0066] Ultrasonicmist inhalers are either disposable or reusable. The term "reusable" as usedherein implies that the energy storagedevice is rechargeable or replaceable or that the liquid is able to be replenished either through refilling or through replacement of the liquid reservoir structure. Alternatively, in some embodiments reusable electronic device is both rechargeable and the liquid can 5 10 15 20 25 30 35 40 45 50 55 5 7 EP 4 755 215 A2 8 be replenished. A disposable embodiment will be de- scribed first, followed by a description of a reusable embodiment.

[0067] Conventional electronic vaporizing inhaler tend to rely on inducing high temperatures of a metal compo- nent configured to heat a liquid in the inhaler, thus vapor- izing the liquid that can bebreathed in. The liquid typically contains nicotineand flavoringsblended into a solution of propylene glycol (PG) and vegetable glycerin (VG), which is vaporized vi a heating component at high tem- peratures. Problems with conventional inhaler may in- clude the possibility of burning metal and subsequent breathing in of the metal along with the burnt liquid. In addition, some may not prefer the burnt smell or taste caused by the heated liquid.

[0068] In contrast, aspects of the present disclosure include an ultrasonic mist inhaler that atomizes the liquid through ultrasonic vibrations, which produces micro water bubbles in the liquid. When the bubbles come into contact with ambient air molecules, water droplets of about 0.25 to 0.5 microns spray into the air, thereby generating micro-droplets that can be absorbed through breathing, similar to breathing in a mist.

[0069] Noheatingelementsare involved, thereby lead- ing to no burnt elements and reducing second-hand smoke effects.

[0070] FIG. 1 depicts a disposable ultrasonic mist in- haler embodiment 100 of the invention. As can be seen in FIG. 1, the ultrasonic mist inhaler 100 has a cylindrical body with a relatively long length "L" as compared to the diameter "D." In terms of shape and appearance, the ultrasonic mist inhaler 100 is designed to mimic the look of a typical cigarette. For instance, the inhaler can feature a first portion 101 that primarily simulates the tobacco rod portion of a cigarette and a second portion 102 that primarily simulates a filter. In the disposable embodiment of the invented device, the first portion and second por- tion are regions of a single, but-separable device. The designation of a first portion and a second portion is used to conveniently differentiate the components that are primarily contained in each portion.

[0071] As can be seen in FIG. 1, the ultrasonic mist inhaler comprises a mouthpiece 1, a liquid reservoir structure 2 and a casing 3. The first portion 101 com- prises thecasing3and the secondportion102comprises the mouthpiece 1 and the reservoir structure 2.

[0072] The first portion 101 contains the power supply energy.

[0073] An electrical storage device 30 powers the ul- trasonic mist inhaler 100. The electrical storage device 30 can be a battery, including but not limited to a lithium- ion, alkaline, zinc-carbon, nickel-metal hydride, or nickel- cadmium battery; a super capacitor; or a combination thereof. In the disposable embodiment, the electrical storage device 30 is not rechargeable, but, in the reusa- ble embodiment, the electrical storage device 30 would be selected for its ability to recharge. In the disposable embodiment, the electrical storage device 30 is primarily selected to deliver a constant voltage over the life of the inhaler 100. Otherwise, the performance of the inhaler would degrade over time. Preferred electrical storage devices that are able to provide a consistent voltage output over the life of the device include lithium-ion and lithium polymer batteries.

[0074] The electrical storage device 30 has a first end 30a that generally corresponds to a positive terminal and a second end 30b that generally corresponds to a nega- tive terminal. The negative terminal is extending to the first end 30a.

[0075] Because the electrical storage device 30 is located in the first portion 101 and the liquid reservoir structure 2 is located in the second portion 102, the joint needs to provide electrical communication between those components. In the present invention, electrical communication is established using at least an electrode or probe that is compressed together when the first portion 101 is tightened into the second portion 102.

[0076] In order for this embodiment to be reusable, the electrical storage device 30 is rechargeable. The casing 3 contains a charging port 32.

[0077] The integrated circuit 4 has a proximal end 4a and a distal end 4b. The positive terminal at the first end 30a of the electrical storage device 30 is in electrical communication with a positive lead of the flexible inte- grated circuit 4. The negative terminal at the second end 30b of the electrical storage device 30 is in electrical communication with a negative lead of the integrated circuit 4. The distal end 4b of the integrated circuit 4 comprise a microprocessor. The microprocessor is con- figured to process data froma sensor, to control a light, to direct current flow to means of ultrasonic vibrations 5 in the second portion 102, and to terminate current flow after a preprogrammed amount of time.

[0078] The sensor detects when the ultrasonic mist inhaler 100 is in use (when the user draws on the inhaler) and activates the microprocessor. The sensor can be selected to detect changes in pressure, air flow, or vibra- tion. In a preferred embodiment, the sensor is a pressure sensor. In the digital embodiment, the sensor takes con- tinuous readings which in turn requires the digital sensor to continuously draw current, but the amount is small and overall battery life would be negligibly affected.

[0079] Additionally, the integrated circuit 4 may com- prise a H bridge, preferably formed by 4 MOSFETs to convert a direct current into an alternate current at high frequency.

[0080] Referring to FIG. 2 and FIG. 3, illustrations of a liquid reservoir structure 2 according to an embodiment are shown. The liquid reservoir structure 2 comprises a liquid chamber 21 adapted to receive liquid to be ato- mized and a sonication chamber 22 in fluid communica- tion with the liquid chamber 21.

[0081] In the embodiment shown, the liquid chamber 21 and sonication chamber 22 are part of a single as- sembly wherein a liquid is incorporated in the liquid chamber 21 from an inlet opening 21a. 5 10 15 20 25 30 35 40 45 50 55 6 9 EP 4 755 215 A2 10

[0082] As an example of sensor position, the sensor may be located in the sonication chamber.

[0083] The liquid reservoir structure 2 is arranged be- tween the mouthpiece 1 and the casing 3 and is detach- able from the mouthpiece 1 and the casing 3.

[0084] The liquid reservoir structure 2 and the mouth- piece 1 or the casing 3 may include complimentary ar- rangements for engaging with one another; further such complimentary arrangements may include one of the following: a bayonet type arrangement; a threaded en- gaged type arrangement; a magnetic arrangement; and, a friction fit arrangement; wherein the liquid reservoir structure 2 includes a portion of the arrangement and the mouthpiece 1 or the casing 3 includes the compli- mentary portion of the arrangement.

[0085] In the reusable embodiment, the components are substantially the same. The differences in the reu- sable embodiment vis-a-vis the disposable embodiment are the accommodations made to replace the liquid reservoir structure 2.

[0086] Asshown inFIG. 3, the liquid reservoir structure 2 has a top wall 23, amiddle wall 24 and a bottomwall 25 extending from a perimeter wall 26.

[0087] The top wall 23 and the middle wall 24 with the perimeter side 26 defines the outer of the liquid chamber 21. Themiddle wall 24 and the bottomwall 25 define with the perimeter wall 26 the outer of the sonication chamber 22. It means themiddle wall 24 is a commonwall with the liquid chamber 21 and the sonication chamber 22.

[0088] The liquid reservoir structure 2 has an internal bore 28 providing an air passage from the sonication chamber 21 toward the surroundings.

[0089] Further, the liquid reservoir structure 2 com- prises of a peripheral inner chamber 27 arranged be- tween the liquid chamber 21and the internal bore28. The peripheral inner chamber 27 provides the fluid commu- nication between the liquid chamber 21 and the sonica- tion chamber 22.

[0090] The peripheral inner chamber 27 has an outer wall 27c delimiting the peripheral inner chamber 27 and the liquid chamber 21. The peripheral inner chamber 27 further has an inner wall 27b delimiting the peripheral inner chamber 27 and the internal bore 28. More parti- cularly, the internal bore 28 is formed by the inner wall 27b.

[0091] The outer wall 27c defines a plurality of trans- verselyextendingapertures27’. Theapertures27’ create capillaries from the liquid chamber 21 through the thick- ness of the peripheral inner chamber 27 to the sonication chamber 22. The apertures 27’ can vary in diameter (the diameter of the capillary aperture will be dictated to a large extent by the viscosity of the fluid; a more viscous fluid can have a larger diameter capillary without leaking, while a less viscous fluid requires a smaller diameter capillary). Generally speaking, the diameters of the aper- tures 27’ are sufficient to facilitate passage of the not yet mist fluid. Theapertures27’ canbecircular oranyother of a variety of geometric shapes.

[0092] A circular opening 27a of the peripheral inner chamber 27 provides fluid communication between the peripheral inner chamber 27 and the sonication chamber 22.

[0093] The inner wall 27c of the peripheral inner cham- ber 27 extends beyond in the sonication chamber 22.

[0094] The topwall 23 of the liquid reservoir structure 2 comprises an airway fluidically coupled to the internal bore 28 and configured to allow liquid mist to flow out of the airway.

[0095] The topwall 23 of the liquid reservoir structure 2 may be coupled with the mouthpiece 1 and the mouth- piece 1 is configured to allow suction ofmist liquid flowing out of the airway to the surroundings.

[0096] The bottom wall 25 of the liquid reservoir struc- ture 2 is abottomplate 25 closing the sonication chamber 22 so that the liquid reservoir structure 2 comprises the sonication chamber 22. The bottom plate 25 is sealed, thus preventing leakage of liquid from the sonication chamber 22 to the casing 3.

[0097] The peripheral inner chamber 27 defines a cav- ity. As depicted in FIG. 3, inserted into the cavity and in contact with the apertures 27’ is a capillary element 7. The capillary element 7 absorbs liquid from the liquid chamber 21 through the apertures 27’. The capillary element 7 is a wick. The capillary element 7 transports liquid to the sonication chamber 22 via capillary action. Preferably the capillary element 7 is made of bamboo fibers; however, cotton, paper, or other fiber strands could be used for a wick material.

[0098] In oneembodiment of theultrasonicmist inhaler 100, the capillary element 7 has a U-shape cross section with two lateral portion 7a inserted into peripheral inner chamber 27 and a central portion 7b in surface contact with the means of ultrasonic vibrations 5.

[0099] As can be seen in FIG. 3, the means of ultra- sonic vibrations 5 are disposed directly below the capil- lary element 7.

[0100] The circular opening 27a of the peripheral inner chamber 27 faces the means of ultrasonic vibrations 5.

[0101] The means of ultrasonic vibrations 5 may be a transducer. For example, the means of ultrasonic vibra- tions 5 may be a piezoelectric transducer, preferably designed in a circular plate-shape. The material of the piezoelectric transducer is preferably in ceramic.

[0102] A variety of transducer materials can also be used for the means of ultrasonic vibrations 5.

[0103] The means of ultrasonic vibrations 5 are sup- ported by an elastic member 8. The elastic member 8 is formed from an annular plate-shaped rubber having an inner hole8’whereinagroove isdesigned formaintaining the means of ultrasonic vibrations 5.

[0104] The bottom plate 25 has a protruding portion 25aonwhich theelasticmember 8 is disposed so that the protruding 25a is inserted at least partially into the elastic member annular plate.

[0105] The bottom plate 25 is fixed to the liquid reser- voir structure 2 bymeans of fixation such as screws, glue 5 10 15 20 25 30 35 40 45 50 55 7 11 EP 4 755 215 A2 12 or friction.

[0106] As depicted in FIG. 3, the elastic member is in line contact with the means of ultrasonic vibrations 5 and prevents contact between the means of ultrasonic vibra- tions 5 and the inhaler walls, suppression of vibrations of the liquid reservoir structure are more effectively pre- vented. Thus, fine particles of the liquid atomized by the atomizing member can be sprayed farther.

[0107] The internal bore comprises a mechanical spring 9.

[0108] By pushing the capillary element 7b onto the means of ultrasonic vibrations 5, themechanical spring 9 ensures a contact surface between them.

[0109] The means of ultrasonic vibrations 5 are in electrical communication with electrical contactors 101a, 101b. It is noted that, the distal end 4b of the integrated circuit 4 has an inner electrode and an outer electrode. The inner electrode contacts the first electrical contact 101a which is a spring contact probe, and the outer electrode contacts the second electrical contact 101b which is a side pin. Via the integrated circuit 4, the first electrical contact 101a is in electrical communication with the positive terminal of the electrical storage device 30 by way of the microprocessor, while the second elec- trical contact 101b is in electrical communication with the negative terminal of the electrical storage device 30.

[0110] The electrical contacts 101a, 101b crossed the bottom plate 25. The bottom plate 25 is designed to be received inside the perimeter wall 26 of the liquid reser- voir structure 2. The bottom plate 25 rests on comple- mentary ridges, thereby creating the sonication chamber 21.

[0111] The liquid reservoir structure 2 and the bottom plate 25 can be made using a variety of thermoplastic materials.

[0112] When the user draws on the ultrasonic mist inhaler 100, the liquid is drawn from the reservoir cham- ber 21 by capillarity, through the plurality of apertures 27’, and into the capillary element 7. The capillary element 7 brings the liquid into contact with the means of ultrasonic vibrations 5 of the inhaler 100. The user’s draw also causes the pressure sensor to activate the integrated circuit 4, which directs current to the means of ultrasonic vibrations 5. Thus, when the user draws on the mouth- piece1of the inhaler100, twoactionshappenat thesame time. Firstly, the sensor activates the integrated circuit 4, which triggers the means of ultrasonic vibrations 5 to begin vibrating. Secondly, the draw reduces the pressure outside the reservoir chamber 21 such that flow of the liquid through the apertures 27’ begins, which saturates the capillary element 7. The capillary element 7 trans- ports the liquid to the means of ultrasonic vibrations 5, which causes bubbles to form in a capillary channel by the means of ultrasonic vibrations 5 and mist the liquid. Then, the mist liquid is drawn by the user.

[0113] The ultrasonic mist inhaler 100 of the present disclosures is amorepowerful version of current portable medical nebulizers, in the shape and size of current e- cigarettes and with a particular structure for effective vaporization. It is a healthier alternative to cigarettes and current e-cigarettes products.

[0114] The ultrasonic mist inhaler 100 of the present disclosures has particular applicability for those who use electronic inhalers as a means to quit smoking and re- duce their nicotine dependency. The ultrasonic mist in- haler 100 provides a way to gradually taper the dose of nicotine.

[0115] Other embodiments of the invented ultrasonic mist inhaler 100 are easily envisioned, including medic- inal delivery devices.

[0116] It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments may be used in combination with each other. In addition, many modificationsmay bemade to adapt a particular situation or material to the teachings of the invention without departing from its scope.

[0117] This divisional application is divided from 19956956.7 filed on 15 December 2019 the European Patent Office (the ’parent application’) and the divisional specification as filed comprises the content of the parent application, including, but not limited to, the description, any drawings, any sequence listing(s) and the original claims recited as ’representative features’. The scope of this disclosure therefore includes the full content of the parent application. In any case, protectionmaybe sought for any features disclosed in the parent application as filed. REPRESENTATIVE FEATURES

[0118] Representative features are set out in the fol- lowing clauses, which stand alone or may be combined, in any combination, with one or more features disclosed in the text and / or drawings of the specification. 1. An ultrasonic mist inhaler, comprising: a liquid reservoir structure comprising a liquid chamber adapted to receive liquid tobeatomized, asonication chamber influidcommunicationwith the liquid cham- ber, wherein the liquid reservoir structure comprises the sonication chamber. 2. The ultrasonic mist inhaler according to the pre- ceding clauses,wherein the liquid reservoir structure comprises an internal bore providing an air passage from the sonication chamber toward the surround- ings. 3. The ultrasonic mist inhaler according to the pre- ceding clauses,wherein the liquid reservoir structure comprises a peripheral inner chamber arranged be- tween the liquid chamber and the internal bore, the peripheral inner chamber providing the fluid commu- nication between the liquid chamber and the sonica- tion chamber. 5 10 15 20 25 30 35 40 45 50 55 8 13 EP 4 755 215 A2 14 4. The ultrasonic mist inhaler according to the pre- ceding clauses, wherein the peripheral inner cham- ber comprises an outer wall delimiting the peripheral inner chamber and the liquid chamber. 5. The ultrasonic mist inhaler according to the pre- ceding clauses, wherein the outer wall comprises at least an aperture providing fluid communication be- tween the liquid chamber and the peripheral inner chamber. 6. The ultrasonic mist inhaler according to any of the clauses 3 to 5, wherein the peripheral inner chamber comprises a circular opening providing fluid commu- nication between the peripheral inner chamber and the sonication chamber. 7. The ultrasonic mist inhaler according to any of the clauses 3 to 6, wherein the peripheral inner chamber comprises an inner wall delimiting the peripheral inner chamber and the liquid chamber. 8. The ultrasonic mist inhaler according to the pre- ceding clause, wherein the inner wall extends in the sonication chamber. 9. The ultrasonic mist inhaler according to any of the preceding clauses, wherein a capillary element is arranged between the liquid chamber and the soni- cation chamber. 10.Theultrasonicmist inhaler according toanyof the precedingclauses,wherein the liquid reservoir struc- ture is made in one piece. 11.Theultrasonicmist inhaler according toanyof the preceding clauses, wherein the sonication chamber comprises means of ultrasonic vibrations. 12.Theultrasonicmist inhaler according toanyof the preceding clauses, wherein the means of ultrasonic vibrations are supported by an elastic member. 13.Theultrasonicmist inhaler according toanyof the precedingclauseswith clause2,wherein the internal bore has a mechanical spring. 14.Theultrasonicmist inhaler according toanyof the preceding clauses with clause 2, wherein the liquid reservoir structure comprises a top end comprising an airway fluidically coupled to the internal bore and configured to allow liquid mist to flow out of the air- way. 15.Theultrasonicmist inhaler according toanyof the preceding clauses, the liquid reservoir structure is arranged between amouthpiece and a casing hous- ing electrical components for powering and operat- ing the inhaler. 16.Theultrasonicmist inhaler according to theanyof the preceding clauses, wherein said liquid to be received in the liquid chamber comprises 57‑70 % (w / w) vegetable glycerin and 30‑43% (w / w) propy- lene glycol, said propylene glycol including nicotine and flavorings. Claims 1. An ultrasonic mist inhaler, comprising: a liquid reservoir structure comprising: a top wall, a bottom wall, and a perimeter wall extending between the top wall and the bottom wall; a liquid chamber defined by at least the top wall and the perimeter wall, the liquid cham- ber being adapted to receive liquid to be atomized; a sonication chamber positioned adjacent to and in fluid communication with the liquid cham- ber; an internal borepassing through the topwall and in communication with the sonication chamber, the internal bore providing an air passage from the sonication chamber toward the surround- ings; a peripheral inner chamber arranged between the liquid chamber and the internal bore, the peripheral inner chamber having an outer wall delimiting the peripheral inner chamber and the liquid chamber, and an inner wall delimiting the peripheral inner chamber and the internal bore, the internal bore being formed by the inner wall of the peripheral inner chamber; and a capillary element positioned at least in part within the peripheral inner chamber, the capil- lary element configured to conduct liquid from the liquid chamber to the sonication chamber to provide the fluid communication between the liquid chamber and the sonication chamber. 2. The ultrasonic mist inhaler according to claim 1, wherein the liquid reservoir comprises a middle wall between the top wall and the bottom wall, wherein the top wall and the middle wall, with the permieter wall, define the outer wall of the liquid chamber. 3. The ultrasonic mist inhaler according to claim 2, wherein the middle wall and bottom wall define, with the perimeter wall, the outer of the sonication cham- ber. 5 10 15 20 25 30 35 40 45 50 55 9 15 EP 4 755 215 A2 16 4. The ultrasonic mist inhaler according to claim 2 or 3, wherein the middle wall is a common wall with the liquid chamber and the sonication chamber. 5. The ultrasonic mist inhaler according to claim 4, wherein the outerwall comprises at least an aperture providing fluid communication between the liquid chamber and the peripheral inner chamber. 6. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the peripheral inner chambercomprisesacircularopeningprovidingfluid communication between the peripheral inner cham- ber and the sonication chamber. 7. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the inner wall extends in the sonication chamber. 8. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure is made in one piece. 9. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the sonication cham- ber comprises means of ultrasonic vibrations. 10. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the means of ultra- sonic vibrations are supported byanelasticmember. 11. The ultrasonic mist inhaler according to any one of the preceding claims,wherein the internal bore has a mechanical spring. 12. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure comprises a top end comprising an airway fluidically coupled to the internal bore and configured to allow liquid mist to flow out of the airway. 13. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure is arranged between a mouthpiece and a casing housing electrical components for powering and operating the inhaler. 14. The ultrasonic mist inhaler according to the any one of the preceding claims, wherein the liquid to be received in the liquid chamber comprises 57‑70 % (w / w) vegetable glycerin and 30‑43% (w / w) propy- lene glycol, the propylene glycol including nicotine and flavorings. 5 10 15 20 25 30 35 40 45 50 55 10 EP 4 755 215 A2 11 EP 4 755 215 A2 12 EP 4 755 215 A2 13 EP 4 755 215 A2 REFERENCES CITED IN THE DESCRIPTION This list of references cited by the applicant is for the reader’s convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard. Patent documents cited in the description • WO IB2019055192 A

[0029] • WO IB2019055192 W

[0059] • WO 19956956 A

[0117] H80001647 超音波霧氣吸入器 本發明涉及一種超音波霧氣吸入器，其包括一液體儲罐結構，所述液體儲罐結構 包括用於接收待霧化液體的液體腔室，以及與所述液體腔室流體連通的超音波腔 室；其中，所述液體儲罐結構包括如圖 3 所示的所述超音波腔室。 摘要

Claims

1. An ultrasonic mist inhaler, comprising: a liquid reservoir structure comprising: a top wall, a bottom wall, and a perimeter wall extending between the top wall and the bottom wall; a liquid chamber defined by at least the top wall and the perimeter wall, the liquid chamber being adapted to receive liquid to be atomized; a sonication chamber positioned adjacent to and in fluid communication with the liquid chamber; an internal bore passing through the top wall and in communication with the sonication chamber, the internal bore providing an air passage from the sonication chamber toward the surroundings; a peripheral inner chamber arranged between the liquid chamber and the internal bore, the peripheral inner chamber having an outer wall delimiting the peripheral inner chamber and the liquid chamber, and an inner wall delimiting the peripheral inner chamber and the internal bore, the internal bore being formed by the inner wall of the peripheral inner chamber; and a capillary element positioned at least in part within the peripheral inner chamber, the capillary element configured to conduct liquid from the liquid chamber to the sonication chamber to provide the fluid communication between the liquid chamber and the sonication chamber.

2. The ultrasonic mist inhaler according to claim 1, wherein the liquid reservoir comprises a middle wall between the top wall and the bottom wall, wherein the top wall and the middle wall, with the permieter wall, define the outer wall of the liquid chamber.

3. The ultrasonic mist inhaler according to claim 2, wherein the middle wall and bottom wall define, with the perimeter wall, the outer of the sonication chamber.

4. The ultrasonic mist inhaler according to claim 2 or 3, wherein the middle wall is a common wall with the liquid chamber and the sonication chamber.

5. The ultrasonic mist inhaler according to claim 4, wherein the outer wall comprises at least an aperture providing fluid communication between the liquid chamber and the peripheral inner chamber.

6. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the peripheral inner chamber comprises a circular opening providing fluid communication between the peripheral inner chamber and the sonication chamber.

7. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the inner wall extends in the sonication chamber.

8. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure is made in one piece.

9. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the sonication chamber comprises means of ultrasonic vibrations.

10. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the means of ultrasonic vibrations are supported by an elastic member.

11. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the internal bore has a mechanical spring.

12. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure comprises a top end comprising an airway fluidically coupled to the internal bore and configured to allow liquid mist to flow out of the airway.

13. The ultrasonic mist inhaler according to any one of the preceding claims, wherein the liquid reservoir structure is arranged between a mouthpiece and a casing housing electrical components for powering and operating the inhaler.

14. The ultrasonic mist inhaler according to the any one of the preceding claims, wherein the liquid to be received in the liquid chamber comprises 57-70 % (w / w) vegetable glycerin and 30-43% (w / w) propylene glycol, the propylene glycol including nicotine and flavorings.

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