Patent Description:
A smoking-substitute device is an electronic device that permits the user to simulate the act of smoking by producing an aerosol mist or vapour that is drawn into the lungs through the mouth and then exhaled. The inhaled aerosol mist or vapour typically bears nicotine and/or other flavourings without the odour and health risks associated with traditional smoking and tobacco products. In use, the user experiences a similar satisfaction and physical sensation to those experienced from a traditional smoking or tobacco product, and exhales an aerosol mist or vapour of similar appearance to the smoke exhaled when using such traditional smoking or tobacco products.

One approach for a smoking substitute device is the so-called "vaping" approach, in which a vaporisable liquid, typically referred to (and referred to herein) as "e-liquid", is heated by a heating device to produce an aerosol vapour which is inhaled by a user. The e-liquid typically includes a base liquid as well as nicotine and/or flavourings. The resulting vapour therefore also typically contains nicotine and/or flavourings. The base liquid may include propylene glycol and/or vegetable glycerine.

Vaping smoking substitute devices can be configured in a variety of ways. For example, there are "closed system" vaping smoking substitute devices, which typically have a sealed tank and heating element. The tank is pre-filled with e liquid and is not intended to be refilled by an end user. One subset of closed system vaping smoking substitute devices include a main body which includes the power source, wherein the main body is configured to be physically and electrically coupled to a consumable including the tank and the heating element. The consumable may also be referred to as a cartomizer. In this way, when the tank of a consumable has been emptied, that consumable is disposed of. The main body can be reused by connecting it to a new, replacement, consumable. Another subset of closed system vaping smoking substitute devices are completely disposable, and intended for one-use only.

There are also "open system" vaping smoking substitute devices which typically have a tank that is configured to be refilled by a user. In this way the device can be used multiple times.

An example vaping smoking substitute device is the myblu(RTM) e-cigarette. The myblu(RTM) e cigarette is a closed system device which includes a main body and a consumable. The main body and consumable are physically and electrically coupled together by pushing the consumable into the main body. The main body includes a rechargeable battery. The consumable includes a mouthpiece, a sealed tank which contains e-liquid, as well as a heating device, which for this device is a heating filament coiled around a portion of a wick. The wick is partially immersed in the e-liquid, and conveys e-liquid from the tank to the heating filament. The device is activated when a microprocessor on board the main body detects a user inhaling through the mouthpiece. When the device is activated, electrical energy is supplied from the power source to the heating device, which heats e-liquid from the tank to produce a vapour which is inhaled by a user through the mouthpiece.

For a smoking substitute device it is desirable to deliver nicotine into the user's lungs, where it can be absorbed into the bloodstream. As explained above, in the so-called "vaping" approach, "e-liquid" is heated by a heating device to produce an aerosol vapour which is inhaled by a user. Many e-cigarettes also deliver flavour to the user, to enhance the experience. Flavour compounds are contained in the e-liquid that is heated. Heating of the flavour compounds may be undesirable as the flavour compounds are inhaled into the user's lungs. Toxicology restrictions are placed on the amount of flavour that can be contained in the e-liquid. This can result in some e-liquid flavours delivering a weak and underwhelming taste sensation to consumers in the pursuit of safety.

Patent document <CIT> proposes a reservoir for aerosol delivery devices. Patent document <CIT> proposes an element for an aerosol-generating system comprising a disabling mechanism. <CIT> proposes an aerosol generating system comprising a capsule and a vaporizing unit releasably connectable to the capsule. The capsule comprises a reservoir for containing a liquid aerosol generating substrate, an opening in fluid communication with the reservoir, and a valve configured to control flow of the liquid aerosol-generating substrate from the reservoir through the opening. The valve comprises one or more resilient closing members biased towards a closed position.

<CIT> proposes an aerosol delivery device comprising a passive aerosol generator In aerosol delivery devices with passive aerosol generation, it is desirable to prevent evaporation of aerosol precursor when the device is not being used.

In aerosol delivery devices, it is desirable to prolong the storage time of such devices without impacting on the quantity or quality of the product.

The present disclosure has been devised in light of the above considerations.

Subject-matter referred as embodiments, aspects and/or disclosures which do not fall under the scope of the claims are not part of the invention.

Generally this application relates to an aerosol delivery device in which a barrier arrangement inhibits evaporation of aerosol precursor when the barrier arrangement in closed, and the barrier arrangement is openable to permit generation of aerosol.

In a first aspect, there is provided aerosol delivery device according to claim <NUM>.

Such an aerosol delivery device is less prone to leakage during transit. Further, evaporation of the aerosol precursor can be prevented when the device is not in use.

Optionally, the barrier arrangement may be configured to open in response to a user inhaling on the aerosol delivery device.

Advantageously, the barrier arrangement may be selectively openable by a user.

Conveniently, the barrier arrangement may further comprise a mouthpiece and a body, wherein the barrier arrangement is configured to open in response to sliding of the mouthpiece relative to the body.

The barrier arrangement comprises a barrier element between the aerosol generator portion and a mouthpiece aperture of the aerosol delivery device to inhibit evaporation of aerosol precursor.

Advantageously, the barrier element may comprise a non-return valve.

Conveniently, the barrier element may comprise a movable shield.

Optionally, the barrier arrangement may be configured to inhibit flow of aerosol precursor between the storage and the aerosol generator portion to inhibit evaporation of aerosol precursor.

Advantageously, the aerosol delivery device may further comprise a transfer element, wherein the transfer element is movable with respect to the barrier arrangement to open the barrier arrangement so that the transfer element can transfer aerosol precursor from the storage to the aerosol generator portion.

Conveniently, the aerosol delivery device may further comprise a member, the member comprising the transfer element and the aerosol generator portion, wherein the member is movable from a first position to a second position to open the barrier arrangement.

Optionally, the aerosol delivery device may further comprise a supporting portion for maintaining a position of the member with respect to the mouthpiece during sliding of the mouthpiece.

Advantageously, the aerosol delivery device may further comprise: a pressure relief opening in the storage; and a blocking arrangement for inhibiting flow through the pressure relief opening, wherein the blocking arrangement is openable to permit air to flow through the pressure relief opening and into the storage as the storage empties of aerosol precursor.

In a second aspect, there is provided an aerosol delivery device comprising: a storage for storing an aerosol precursor; a transfer element; and a barrier arrangement for inhibiting flow of aerosol precursor from the storage to the transfer element when the barrier arrangement is in a closed position, wherein the barrier arrangement is selectively actuatable between the closed position and an open position, and when the barrier arrangement is in the open position the transfer element can transfer aerosol precursor from the storage.

Such an aerosol delivery device can be used to selectively provide aerosol to the user.

The barrier arrangement may be referred to as a charging or filling mechanism, operable to charge, recharge, fill, or refill the transfer element with aerosol precursor. The transfer element may be for transferring aerosol precursor to an aerosol generator of the aerosol delivery device.

Optionally, the transfer element may be selectively exposable to the storage to selectively open and close the barrier arrangement.

Advantageously, the transfer element may be movable with respect to the barrier arrangement to selectively expose the transfer element to the storage.

Conveniently, the barrier arrangement may comprise a barrier element configured to move with the transfer element, the barrier element configured to inhibit flow of aerosol precursor from the storage to the transfer element when the barrier arrangement is in the closed position.

Optionally, the barrier arrangement may further comprise a tube, the transfer element received in the tube and the barrier element configured to block the tube when the barrier arrangement is in the closed position.

Advantageously, the barrier element may be fixed to an end portion of the transfer element, and the barrier element may be configured to be out of the tube such that a side portion of the transfer element is exposed to the storage when the barrier arrangement is in the open position.

Conveniently, the aerosol delivery device may further comprise an aerosol generator configured to receive aerosol precursor from the storage and form an aerosol from the aerosol precursor.

Optionally, the aerosol generator may comprise an aerosol generator portion configured to receive the aerosol precursor from the storage, and the aerosol delivery device comprises an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Advantageously, the aerosol delivery device may further comprise a member, the member comprising the transfer element and the aerosol generator portion.

Conveniently, the member may be movable with respect to the barrier arrangement to selectively expose the transfer element to the storage.

Optionally, the aerosol delivery device may further comprise a mouthpiece and a body, wherein the barrier arrangement is configured to open in response to sliding of the mouthpiece relative to the body.

Advantageously, the transfer element may be porous.

In a third aspect, there is provided an aerosol delivery device comprising: a storage for storing an aerosol precursor; an additional storage; and a barrier arrangement for inhibiting flow of aerosol precursor from the storage to the additional storage, the barrier arrangement openable to permit flow of aerosol precursor from the storage to the additional storage.

Such an aerosol delivery device is less prone to leakage during transit.

Optionally, the aerosol delivery device may comprise an aerosol generator configured to receive aerosol precursor from the additional storage and form an aerosol from the aerosol precursor.

Advantageously, the aerosol generator may comprise an aerosol generator portion configured to receive the aerosol precursor from the additional storage, and the aerosol delivery device may comprise an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Conveniently, the aerosol delivery device may comprise a transfer element for transferring aerosol precursor from the additional storage to the aerosol generator portion. The transfer element may be at least partially contained within the additional storage. The additional storage is, in some examples, a container into which aerosol precursor can freely flow once the barrier mechanism is opened.

Optionally, the aerosol delivery device may comprise a member, the member comprising the transfer element and the aerosol generator portion.

Conveniently, the barrier arrangement may comprise a barrier component between the storage and the additional storage, and the transfer element is movable to pierce the barrier component to open the barrier arrangement.

Optionally, the barrier component may be a foil membrane.

Advantageously, the aerosol delivery device may comprise a mouthpiece and a body, wherein the barrier arrangement is configured to open in response to sliding of the mouthpiece relative to the body.

Conveniently, the aerosol delivery device may comprise a supporting portion for maintaining a position of the transfer element with respect to the mouthpiece during sliding of the mouthpiece.

Optionally, the storage may comprise a free liquid tank and the additional storage comprises a porous reservoir.

Advantageously, the additional storage may be located closer to a mouthpiece opening than the storage.

In a fourth aspect, there is provided aerosol delivery device comprising: a storage for storing an aerosol precursor; a transfer element; and a barrier arrangement comprising a plug, the plug configured to inhibit flow of aerosol precursor from the storage to the transfer element when the plug is in a closed position, wherein the plug is displaceable to open the barrier arrangement so that the transfer element can transfer aerosol precursor from the storage.

Such an aerosol delivery device is less prone to leakage during transit. The transfer element may be for transferring aerosol precursor from the storage to an aerosol generator of the aerosol delivery device.

Optionally, the transfer element may be movable to displace the plug to open the transfer element.

Advantageously, the aerosol delivery device may comprise a tube, wherein the transfer element and the plug are received in the tube, and the plug is displaceable from the tube to open the barrier arrangement.

Conveniently, the aerosol delivery device may comprise an aerosol generator comprising an aerosol generator portion configured to receive the aerosol precursor from the transfer element; and an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Optionally, the aerosol delivery device may comprise a member, the member comprising the transfer element and the aerosol generator portion, wherein the member is movable from a first position to a second position to open the barrier arrangement.

Advantageously, the aerosol delivery device may comprise a guide for inhibiting return of the plug to the closed position after displacement of the plug.

Conveniently, the guide may comprise a recess for receiving the plug.

Optionally, the plug may be formed of silicone.

Conveniently, the aerosol delivery device may comprise a supporting portion for maintaining a position of the member with respect to the mouthpiece during sliding of the mouthpiece.

Optionally, the aerosol delivery device may comprise a pressure relief opening in the storage; and a blocking arrangement for inhibiting flow through the pressure relief opening, wherein the blocking arrangement is openable to permit air to flow through the pressure relief opening and into the storage as the storage empties of aerosol precursor.

In a fifth aspect, there is provided an aerosol delivery device comprising: a storage for storing an aerosol precursor; a transfer element; and a barrier arrangement for inhibiting flow of aerosol precursor from the storage to the transfer element, wherein the storage is movable with respect to the barrier arrangement to open the barrier arrangement so that the transfer element can transfer aerosol precursor from the storage.

Such an aerosol delivery device is less prone to leakage during transit. The transfer element may be for transferring aerosol precursor from the storage to an aerosol generator of the aerosol delivery device. The storage maybe movable relative to a mouthpiece of the aerosol delivery device, and this movement may cause the barrier arrangement to be opened. The barrier arrangement may be fixed relative to the mouthpiece until the barrier arrangement is opened.

Optionally, the storage may be movable relative to the transfer element to open the barrier arrangement.

Advantageously, the barrier arrangement may comprise a plug received in a tube, the plug configured to inhibit flow of aerosol precursor from the storage to the transfer element, wherein the tube is configured to move with the storage, and the plug is displaceable from the tube on movement of the storage so that the transfer element can transfer aerosol precursor from the storage.

Conveniently, movement of the storage may cause the transfer element to contact the plug to displace the plug from the tube. For example, the plug may be freely placed in the tube (or held only by a relatively light interference fit). Thus, when the tube is moved relative to the transfer element, the plug will no longer be retained within the tube.

Optionally, the barrier arrangement may comprise a deformable barrier component, the barrier component configured to deform to open the barrier arrangement on movement of the storage.

Advantageously, movement of the storage may cause the transfer element to pierce the barrier component to open the barrier arrangement.

Conveniently, the aerosol delivery device may comprise a slidable switch for moving the storage.

Advantageously, the moving the switch may cause the blocking arrangement to open.

Conveniently, the connector may provide the blocking arrangement, and the aerosol delivery device further comprises a stop, the stop configured to inhibit movement of the storage after the barrier arrangement is open, such that further movement of the switch causes the connector to disconnect from the storage to open the blocking arrangement.

Optionally, the aerosol delivery device may further comprise an aerosol generator comprising an aerosol generator portion configured to receive the aerosol precursor from the transfer element; and an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Advantageously, the aerosol delivery device may further comprise a member, the member comprising the transfer element and the aerosol generator portion, wherein the member is movable from a first position to a second position to open the barrier arrangement.

Conveniently, the aerosol delivery device may further comprise a mouthpiece and a supporting portion for maintaining a position of the member with respect to the mouthpiece during movement of the storage.

In a sixth aspect, there is provided aerosol delivery device comprising: a storage for storing an aerosol precursor; a pressure relief opening in the storage; and a blocking arrangement for inhibiting flow through the pressure relief opening, wherein the blocking arrangement is openable to permit air to flow through the pressure relief opening and into the storage as the storage empties of aerosol precursor.

Optionally, the aerosol delivery device may comprise a mouthpiece and a body, the mouthpiece movable relative to the body to open the blocking arrangement.

Advantageously, twisting of the mouthpiece relative to the body may cause opening of the blocking arrangement.

Conveniently, sliding of the mouthpiece relative to body may cause opening of the blocking arrangement.

Optionally, the blocking arrangement may comprise a blocking component for inhibiting flow through the pressure relief opening, the blocking component defining an aperture, the aperture alignable with the pressure relief opening to open the blocking arrangement.

Advantageously, the blocking arrangement may comprise a blocking component for inhibiting flow through the pressure relief opening and a piercing component movable relative to the blocking component, wherein the blocking component is pierceable by the piercing component to open the blocking arrangement.

Conveniently, the aerosol delivery device may comprise a transfer element; and a barrier arrangement for inhibiting flow of aerosol precursor from the storage to the transfer element, the barrier arrangement openable to permit flow of aerosol precursor from the storage to the transfer element.

Optionally, the aerosol delivery device may comprise an aerosol generator comprising an aerosol generator portion configured to receive the aerosol precursor from the transfer element; and an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Advantageously, the aerosol delivery device may comprise a member, the member comprising the transfer element and the aerosol generator portion, wherein the member is movable from a first position to a second position to open the barrier arrangement.

Optionally, opening of the barrier arrangement may cause open of the blocking arrangement.

Advantageously, the member may be slidable from the first position to the second position to open the barrier arrangement.

In a seventh aspect, there is provided aerosol delivery device comprising: a storage for storing an aerosol precursor; a transfer element; and a barrier arrangement for inhibiting flow of aerosol precursor from the storage to the transfer element, wherein the transfer element is movable with respect to the barrier arrangement to open the barrier arrangement so that the transfer element can transfer aerosol precursor from the storage.

Optionally, the aerosol delivery device may further comprise an aerosol generator comprising an aerosol generator portion configured to receive the aerosol precursor from the transfer element; and an air flow passage configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol. The transfer element may be configured to transfer aerosol precursor from the storage to the aerosol generator once the barrier arrangement is open.

Advantageously, the aerosol generator portion may further comprise a member, the member comprising the transfer element and the aerosol generator portion, wherein the member is movable from a first position to a second position to open the barrier arrangement.

Conveniently, the member may be slidable from the first position to the second position to open the barrier arrangement.

Advantageously, the aerosol delivery device may further comprise a supporting portion for maintaining a position of the member with respect to the mouthpiece during sliding of the mouthpiece.

Conveniently, the barrier arrangement may be configured to remain permanently open after opening.

Optionally, the barrier arrangement may comprise a plug received in a tube, the plug configured to inhibit flow of aerosol precursor from the storage to the transfer element, wherein the plug is displaceable from the tube on movement of the transfer element so that the transfer element can transfer aerosol precursor from the storage.

Advantageously, the aerosol delivery device may further comprise a guide for inhibiting return of the plug to the tube after the plug is displaced from the tube.

Conveniently, the barrier arrangement may comprise a deformable barrier component, and the transfer element is configured to deform the barrier component to open the barrier arrangement.

Optionally, the aerosol delivery device may further comprise a pressure relief opening in the storage; and a blocking arrangement for inhibiting flow through the pressure relief opening, wherein the blocking arrangement is openable to permit air to flow through the pressure relief opening and into the storage as the storage empties of aerosol precursor.

The present disclosure also relates to an aerosol delivery device comprising a frangible seal between a reservoir and an aerosol generator.

In an eighth aspect, there is provided aerosol delivery device comprising:.

Such an aerosol delivery device may be stored for a longer period of time without degradation of the aerosol precursor. Further, such an aerosol delivery device is less prone to leakage during transportation.

Optionally, the device may further comprise an aerosol generator portion configured to receive the aerosol precursor, when the frangible seal is broken, and an airflow passage, configured to direct air past the aerosol generator portion to pick up the aerosol precursor from the aerosol generator portion to form an aerosol.

Advantageously, the aerosol generator portion may include a Venturi aperture and a porous member located within the Venturi aperture and fluidly connectable to the reservoir.

Conveniently, the device may further comprise a housing of the reservoir which is configured to deform and break the frangible seal. Optionally, the device may further comprise an outer housing, adjacent to the housing of the reservoir and configured to deform upon application of a force and impact the housing of the reservoir.

Advantageously, the frangible seal may be a cylindrical glass seal encapsulating a region of the aerosol generator. Conveniently, the aerosol generator may comprise a nib and a shaft, and the shaft may be disposed within the cylindrical glass seal.

Conveniently, the frangible seal may be configured to break when a force of greater than <NUM> kgf is applied.

Optionally, the device may further comprise a button which, when pressed, breaks the frangible seal.

Advantageously, the device may further comprise a vapour generator, for vaporising a vapour precursor, and the aerosol generator by the aerosol generator may be mixed with the vapour downstream of the vapour generator.

Conveniently, the aerosol precursor may be a flavour aerosol precursor and may be substantially nicotine free.

Optionally, the aerosol generator may be made of a material having a different colour to the aerosol precursor.

Advantageously, the aerosol delivery device may have a longitudinal axis, and the frangible seal may be configured to break upon application of a force transversal to the longitudinal axis.

Conveniently, the aerosol delivery device is a consumable for a smoking substitute device.

Optionally, the device further comprises an additional aerosol generator, the additional aerosol generator being configured to heat an additional aerosol precursor to produce an additional aerosol.

In a ninth aspect, there is provided a smoking substitute device including the aerosol delivery device according to the eighth aspect.

In a tenth aspect, there is provided a method of activating the aerosol delivery device of the eighth aspect, comprising the step of applying a force to the frangible seal to break it.

The method may further comprise a step, performed before or after the step of applying the force, of moving the aerosol generator relative to the reservoir. The step of moving the aerosol generator relative to the reservoir may cause a piercing member to open a pressure relief opening in the reservoir.

In any of the aspects described above, the aerosol delivery device may be a consumable for a vaping device.

In any of the aspects described above, the aerosol delivery device may further comprise an additional aerosol generator, the additional aerosol generator configured to produce an additional aerosol from an additional aerosol precursor.

In any of the aspects described above, the additional aerosol generator may be configured to heat the additional aerosol precursor to form the additional aerosol.

The disclosure includes the combination of the aspects and preferred features described except where such a combination is clearly impermissible or expressly avoided.

So that the discsloure may be understood, and so that further aspects and features thereof may be appreciated, embodiments illustrating the principles will now be discussed in further detail with reference to the accompanying figures, in which:.

Aspects and embodiments will now be discussed with reference to the accompanying figures.

Referring to <FIG>, there is shown a smoking substitute device <NUM>. In this example, the smoking substitute device comprises a cartomiser <NUM> and a flavour pod <NUM> connected to a base unit <NUM>. In this example, the base unit <NUM> includes elements of the smoking substitute device such as a battery, an electronic controller, and a pressure transducer. The cartomiser <NUM> may engage with the base unit <NUM> via a push-fit engagement, a screw-thread engagement, or a bayonet fit, for example. A cartomiser may also be referred to as a "pod". The smoking substitute device can include an aerosol delivery device according to the present disclosure.

The flavour pod <NUM> is configured to engage with the cartomiser <NUM> and thus with the base unit <NUM>. The flavour pod <NUM> may engage with the cartomiser <NUM> via a push-fit engagement, a screw-thread engagement, or a bayonet fit, for example. <FIG> illustrates the cartomiser <NUM> engaged with the base unit <NUM>, and the flavour pod <NUM> engaged with the cartomiser <NUM>. As will be appreciated, in this example, the cartomiser <NUM> and the flavour pod <NUM> are distinct elements. Each of the cartomiser <NUM> and the flavour pod may be an aerosol delivery device according to the present disclosure.

As will be appreciated from the following description, the cartomiser <NUM> and the flavour pod <NUM> may alternatively be combined into a single component that implements the functionality of the cartomiser <NUM><NUM> and flavour pod <NUM>. Such a single component may also be an aerosol delivery device according to the present disclosure. In other examples, the cartomiser may be absent, with only a flavour pod <NUM> present.

A "consumable" component may mean that the component is intended to be used once until exhausted, and then disposed of as waste or returned to a manufacturer for reprocessing.

Referring to <FIG>, there is shown a smoking substitute device comprising a base unit <NUM> and a consumable <NUM>. The consumable <NUM> combines the functionality of the cartomiser <NUM> and the flavour pod <NUM>. In <FIG>, the consumable <NUM> and the base unit <NUM> are shown separated from one another. In <FIG>, the consumable <NUM> and the base unit <NUM> are engaged with each other to form the smoking substitute device <NUM>.

Referring to <FIG>, there is shown a consumable <NUM> engagable with a base unit via a push-fit engagement in a deactivated state. The consumable <NUM> may be considered to have two portions - a cartomiser portion <NUM> and a flavour pod portion <NUM>, both of which are located within a single component (as in <FIG>).

The consumable <NUM> includes an upstream airflow inlet <NUM> and a downstream airflow outlet <NUM>. In other examples a plurality of inlets and/or outlets are included. Between and fluidly connecting the inlet <NUM> and the outlet <NUM> there is an airflow passage <NUM>. The outlet <NUM> is located at the mouthpiece <NUM> of the consumable <NUM>, and is formed by a mouthpiece aperture.

As above, the consumable <NUM> includes a flavour pod portion <NUM>. The flavour pod portion <NUM> is configured to generate a first (flavour) aerosol for output from the outlet <NUM> of the mouthpiece <NUM> of the consumable <NUM>. The flavour pod portion <NUM> of the consumable <NUM> includes a liquid transfer element <NUM>, in the form of a member <NUM>. The member <NUM> acts as a passive aerosol generator (e.g. an aerosol generator which does not use heat to form the aerosol, also referred to as a "first aerosol generator" in this example), and is formed of a porous material. The member <NUM> comprises a supporting portion <NUM>, which is located inside a housing, and an aerosol generator portion <NUM>, which is located in the airflow passage <NUM>. In this example, the aerosol generator portion <NUM> is a porous nib.

When activated, as discussed in more detail below, a first storage <NUM> (in this example a tank) for storing a first aerosol precursor (i.e. a flavour liquid) is fluidly connected to the member <NUM>. The porous nature of the member <NUM> means that flavour liquid from the first storage <NUM> is drawn into the member <NUM>. As the first aerosol precursor in the member <NUM> is depleted in use, further flavour liquid is drawn from the first storage <NUM> into the member <NUM> via a wicking action.

Before activation, the barrier arrangement <NUM> is closed and inhibits evaporation of aerosol precursor. In this example, this is achieved by the barrier arrangement inhibiting flow of aerosol precursor from the first storage <NUM> to the member <NUM>. In order to inhibit flow of aerosol precursor, the barrier arrangement <NUM> substantially isolates the first storage <NUM> from the member <NUM>. In this example, the barrier arrangement comprises a plug <NUM> (preferably formed from silicon) located at one end of a tube <NUM> containing the member <NUM> close to the first storage <NUM>. The tube <NUM> may be an example of the frangible seal discussed above in relation to the eighth aspect. To activate the consumable <NUM>, a user may squeeze the flavour pod portion <NUM> thereby braking the frangible seal.

In other examples, the plug may be replaced by a deformable and/or breakable barrier component, e.g. any one of: a duck bill valve; a split valve or diaphragm; or a sheet of foil, which may be pierced by the member <NUM> when opening the barrier arrangement.

The first storage <NUM> further includes a pressure relief opening <NUM>, which in the deactivated state is sealed by blocking arrangement. In this example, the blocking arrangement comprises a pierceable cover (preferably made from foil). Piercing member <NUM>, which is formed as a part of the mouthpiece <NUM> and may take the form of a blade, pierces the pierceable cover and opens the pressure relief opening <NUM> when the consumable is moved to the activated state (as is discussed in more detail below). This means that opening of the barrier arrangement also effects opening of the blocking arrangement.

As described above, the aerosol generator portion <NUM> is located within the airflow passage <NUM> through the consumable <NUM>. The aerosol generator portion <NUM> therefore constricts or narrows the airflow passage <NUM>. The aerosol generator portion <NUM> occupies some of the area of the airflow passage, resulting in constriction of the airflow passage <NUM>. The airflow passage <NUM> is narrowest adjacent to the aerosol generator portion <NUM>. Since the constriction results in increased air velocity and corresponding reduction in air pressure at the aerosol generator portion <NUM>, the constriction is a Venturi aperture <NUM>. The constriction is generally toroidal in shape, and may include one or more intersections where supports contact the aerosol generator portion <NUM>.

The cartomiser portion <NUM> of the consumable <NUM> includes a second storage <NUM> (in this example a tank) for storing a second aerosol precursor (i.e. e-liquid, which may contain nicotine). Extending into the second storage <NUM> is a wick <NUM>. The wick <NUM> is formed from a porous wicking material (e.g. a polymer) that draws second aerosol precursor from the second storage <NUM> into a central region of the wick <NUM> that is located outside the e-liquid storage tank <NUM>.

A heater <NUM> is a configured to heat the central region of the wick <NUM>. The heater <NUM> includes a resistive heating filament that is coiled around the central region of the wick <NUM>. The wick <NUM>, the heater <NUM> and the e-liquid storage tank <NUM> together act as an active aerosol generator (i.e. an aerosol generator which uses heat to form the aerosol, referred to as a "second aerosol generator" in this example).

As described above, the first and second aerosol generators are both at least partially located within the airflow passage <NUM>, with the first aerosol generator downstream (with respect to air flow in use) of the second aerosol generator.

So that the consumable <NUM> may be supplied with electrical power for activation of the heater <NUM>, the consumable <NUM> includes a pair of consumable electrical contacts <NUM>. The consumable electrical contacts <NUM> are configured for electrical connection to a corresponding pair of electrical supply contacts in the base unit <NUM>. The consumable electrical contacts <NUM> are electrically connected to the electrical supply contacts <NUM> when the consumable <NUM> is engaged with the base unit <NUM>. The base unit <NUM> includes an electrical power source (not shown), for example a battery.

<FIG> shows the consumable <NUM> of <FIG> in an activated state, like features are indicated by like reference numerals. To transition from the deactivated state to the activated state, mouthpiece <NUM> is moved along a central axis <NUM> towards cartomizer portion <NUM> (e.g. one along which the consumable extends, and along which member <NUM> extends). Moving the mouthpiece <NUM> in this way effects relative movement between the liquid transfer element (i.e. the member <NUM>) and the barrier arrangement. This causes the barrier arrangement to open. In other examples, a switch is provided for opening the barrier arrangement.

The mouthpiece <NUM>, via supporting portion <NUM>, is fixed to the member <NUM> and therefore member <NUM> moves with the mouthpiece <NUM>. The mouthpiece <NUM>, and member <NUM>, is moved relative to the tank <NUM>. This causes displacement of the plug <NUM> and opening of the barrier arrangement <NUM>.

At the same time, movement of the mouthpiece <NUM> causes the piercing member <NUM> to contact and pierce pressure relief opening <NUM>, thereby fluidly connecting the airflow passage <NUM> to an interior of the first storage <NUM>. This permits air to flow into the first storage <NUM> as the first storage empties of aerosol precursor in use.

In the present example, once the barrier arrangement is open, the plug <NUM> is unconstrained within the first storage. However, in other cases, the plug <NUM> may be received by a guide for inhibiting return of the plug to the closed position after displacement of the plug. The guide may comprise a recess for receiving the plug <NUM>.

In the present example, the barrier arrangement remains permanently open after opening, as the plug <NUM> does not return to the tube <NUM>. However, in other examples, the barrier arrangement is selectively openable and closable by the user. This may be achieved by the plug (or another type of barrier arrangement) being fixed to an end portion of the member <NUM>, such that the member <NUM> is selectively exposable to the first storage <NUM>.

Once activated, and in use, a user draws (or "sucks", "pulls", or "puffs") on the mouthpiece <NUM> of the consumable <NUM>, which causes a drop in air pressure at the outlet <NUM>, thereby generating air flow through the inlet <NUM>, along the airflow passage <NUM>, out of the outlet <NUM> and into the user's mouth.

When the heater <NUM> is activated (by passing an electric current through the heating filament in response to the user drawing on the mouthpiece <NUM>, the drawing of air may be detected by a pressure transducer) the e-liquid located in the wick <NUM> adjacent to the heating filament is heated and vaporised to form a vapour. The vapour condenses to form the second aerosol within the airflow passage <NUM>. Accordingly, the second aerosol is entrained in an airflow along the airflow flow passage <NUM> to the outlet <NUM> and ultimately out from the mouthpiece <NUM> for inhalation by the user when the user <NUM> draws on the mouthpiece <NUM>.

The base unit <NUM> supplies electrical current to the consumable electrical contacts <NUM>. This causes an electric current flow through the heating filament of the heater <NUM> and the heating filament heats up. As described, the heating of the heating filament causes vaporisation of the e-liquid in the wick <NUM> to form the second aerosol.

As the air flows up through the airflow passage <NUM>, it encounters the aerosol generator portion <NUM>. The constriction of the airflow passage <NUM> caused by the aerosol generator portion <NUM> results in an increase in air velocity and corresponding decrease in air pressure in the airflow in the vicinity of the porous surface <NUM> of the aerosol generator portion <NUM>. The corresponding low pressure and high air velocity region causes the generation of the first (flavour) aerosol from the porous surface <NUM> of the aerosol generator portion <NUM>. The first (flavour) aerosol is entrained into the airflow and ultimately is output from the outlet <NUM> of the consumable <NUM> and thus from the mouthpiece <NUM> into the user's mouth.

The first aerosol is sized to inhibit pulmonary penetration. The first aerosol is formed of particles with a mass median aerodynamic diameter that is greater than or equal to <NUM> microns, in particular, greater than <NUM> microns, more particularly greater than <NUM> microns, yet more particularly greater than <NUM> microns, and even more particularly greater than <NUM> microns.

The first aerosol is sized for transmission within at least one of a mammalian oral cavity and a mammalian nasal cavity. The first aerosol is formed by particles having a maximum mass median aerodynamic diameter that is less than <NUM> microns, in particular less than <NUM> microns, yet more particularly less than <NUM> microns. Such a range of mass median aerodynamic diameter will produce aerosols which are sufficiently small to be entrained in an airflow caused by a user drawing air through the flavour element and to enter and extend through the oral and or nasal cavity to activate the taste and/or olfactory receptors.

The second aerosol generated is sized for pulmonary penetration (i.e. to deliver an active ingredient such as nicotine to the user's lungs). The second aerosol is formed of particles having a mass median aerodynamic diameter of less than or equal to <NUM> microns, preferably less than <NUM> microns, more preferably less than <NUM> microns, yet more preferably less than <NUM> micron. Such sized aerosols tend to penetrate into a human user's pulmonary system, with smaller aerosols generally penetrating the lungs more easily. The second aerosol may also be referred to as a vapour.

The size of aerosol formed without heating is typically smaller than that formed by condensation of a vapour.

As a brief aside, it will be appreciated that the mass median aerodynamic diameter is a statistical measurement of the size of the particles/droplets in an aerosol. That is, the mass median aerodynamic diameter quantifies the size of the droplets that together form the aerosol. The mass median aerodynamic diameter may be defined as the diameter at which <NUM>% of the particles/droplets by mass in the aerosol are larger than the mass median aerodynamic diameter and <NUM>% of the particles/droplets by mass in the aerosol are smaller than the mass median aerodynamic diameter. The "size of the aerosol", as may be used herein, refers to the size of the particles/droplets that are comprised in the particular aerosol.

Referring to <FIG>, there is shown a flavour pod portion <NUM> of a consumable in an activated state, the consumable providing an aerosol delivery device. The consumable further comprises a cartomiser portion (not shown in <FIG>) having all of the features of the cartomiser portion <NUM> described above with respect to <FIG> and <FIG>. However, in other examples, the consumable does not comprise the cartomiser portion, and provides only flavour to the user.

The flavour pod portion <NUM> comprises an upstream (i.e. upstream with respect to flow of air in use) inlet <NUM> and a downstream (i.e. downstream with respect to flow of air in use) outlet <NUM>. Between and fluidly connecting the inlet <NUM> and the outlet <NUM> the flavour pod portion <NUM> comprises an airflow passage <NUM>. The airflow passage <NUM> comprises a first airflow branch <NUM> and a second airflow branch <NUM>, each of the first airflow branch <NUM> and the second airflow branch <NUM> fluidly connecting the inlet <NUM> and the outlet <NUM>. In other examples the airflow passage <NUM> may have an annular shape. The outlet <NUM> is located at the mouthpiece <NUM> of the consumable <NUM>, and is also referred to as a mouthpiece aperture <NUM>.

The flavour pod portion <NUM> comprises a storage, which stores a first aerosol precursor. The storage comprises a reservoir <NUM> located within a chamber <NUM>. The reservoir <NUM> is formed of a first porous material.

The flavour pod portion <NUM> comprises a member <NUM>, which comprises an aerosol generator portion <NUM> and a supporting portion <NUM>. The aerosol generator portion <NUM> is located at a downstream end (an upper end in <FIG>) of the member <NUM>, while the supporting portion <NUM> makes up the rest of the member <NUM>. The supporting portion <NUM> is elongate and substantially cylindrical. The aerosol generator portion <NUM> is bulb-shaped, and comprises a portion which is wider than the supporting portion <NUM>. The aerosol generator portion <NUM> tapers to a tip at a downstream end of the aerosol generator portion <NUM>.

The member <NUM> extends into and through the reservoir <NUM>. The member <NUM> is in contact with the reservoir <NUM>. More specifically, the supporting portion <NUM> extends into and <NUM> is in contact with the reservoir <NUM>. The member <NUM> is located in a substantially central position within the reservoir <NUM> and is substantially parallel to a central axis of the consumable. The member <NUM> is formed of a second porous material.

The first and second airflow branches <NUM>, <NUM> are located on opposite sides of the member <NUM>. Additionally, the first and second airflow branches <NUM>, <NUM> are located on opposite sides of the reservoir <NUM>. The first and second airflow branches <NUM>, <NUM> branch in a radial outward direction (with respect to the central axis of the consumable <NUM>) downstream of the inlet <NUM> to reach the opposite sides of the reservoir <NUM>.

The aerosol generator portion <NUM> is located in the airflow passage <NUM> downstream of the first and second airflow branches <NUM>, <NUM>. The first and second airflow branches <NUM>, <NUM> turn in a radially inward direction to merge at the member <NUM>, at a point upstream of the aerosol generator portion <NUM>.

The aerosol generator portion <NUM> is located in a narrowing section <NUM> of the airflow passage <NUM>. The narrowing section <NUM> is downstream of the point at which the first and second airflow branches <NUM><NUM> merge, but upstream of the mouthpiece aperture <NUM>. The mouthpiece aperture <NUM> flares outwardly in the downstream direction, such that a width of the mouthpiece aperture <NUM> increases in the downstream direction.

In use, when a user draws on the mouthpiece <NUM>, air flow is generated through the air flow passage <NUM>. Air (comprising the second aerosol from the cartomiser portion as explained above with respect to <FIG>) flows through the inlet <NUM> before the air flow splits to flow through the first and second airflow branches <NUM>, <NUM>. Further downstream, the first and second airflow branches <NUM>, <NUM> provide inward airflow towards the member <NUM> and the aerosol generator portion <NUM>.

As air flows past the aerosol generator portion in the narrowing section <NUM>, the velocity of the air increases, resulting in a drop in air pressure. This means that the air picks up the first aerosol precursor from the aerosol generator portion <NUM> to form the first aerosol. The first aerosol has the particle size and other properties described above with respect to <FIG>.

As the first aerosol precursor is picked up by the air, the member <NUM> transfers further first aerosol precursor from the reservoir <NUM> to the aerosol generator portion <NUM>. More specifically, the member <NUM> wicks the first aerosol precursor from the reservoir <NUM> to the aerosol generator portion <NUM>.

In other examples, the storage comprises a tank containing the first aerosol precursor as free liquid, rather than the reservoir <NUM> and the chamber <NUM>. In such examples, the member <NUM> still extends into the tank to transfer first aerosol precursor from the tank to the aerosol generator portion <NUM>.

<FIG> show further views of the flavour pod portion <NUM> which highlight features of the mouthpiece <NUM>. Many of the reference numerals of <FIG> are omitted from <FIG> for clarity.

The mouthpiece aperture <NUM> comprises an inner surface <NUM>, which is uneven. In the present example, the inner surface <NUM> has the form of a substantially frustoconical surface, but includes grooves or channels <NUM> to make the inner surface <NUM> somewhat uneven. In other examples, the inner surface <NUM> may have another form (for example, the form a substantially cylindrical surface), and may include any type of protrusion or groove to make the inner surface uneven.

The inner surface <NUM> is angled with respect to an axial direction (i.e. relative to a central axis extending from a base of the consumable to the mouthpiece) such that the width of the mouthpiece aperture <NUM> increases in the downstream direction. The inner surface <NUM> is immediately downstream of the narrowing section <NUM> of the airflow passage <NUM>.

The grooves <NUM> are generally v-shaped in cross-sectional profile, and extend in the axial direction for the full length of the inner surface <NUM>. Each groove <NUM> is formed from a pair of surfaces angled at between <NUM> and <NUM> degrees relative to each other. More specifically, each groove <NUM> is formed from a pair of surfaces angled at <NUM> degrees relative to each other.

The grooves <NUM> have a depth (measured normal to the inner surface <NUM>) of at least <NUM>. More specifically, the grooves <NUM> have a depth of at least <NUM>. More specifically, the grooves <NUM> have a depth of at least <NUM>.

The grooves <NUM> have a depth of less than <NUM>. More specifically, the grooves have a depth of less than <NUM>. More specifically, the grooves have a depth of less than <NUM>.

More specifically, the grooves have a depth of substantially <NUM>.

The grooves <NUM> are substantially equi-spaced in a circumferential manner around the inner surface <NUM>. The inner surface <NUM> comprises at least <NUM> grooves. More specifically, the inner surface comprises at least <NUM> grooves. More specifically, the inner surface <NUM> comprises at least <NUM> grooves.

The inner surface <NUM> comprises at most <NUM> grooves <NUM>. More specifically, the inner surface <NUM> comprises at most <NUM> grooves <NUM>. More specifically, the inner surface <NUM> comprises at most <NUM> grooves <NUM>.

More specifically, the inner surface <NUM> comprises <NUM> grooves <NUM>.

The grooves <NUM> are spaced apart from each other by substantially <NUM> at the downstream end of the inner surface <NUM>. In other examples, the spacing at the downstream end of grooves or protrusions may be selected such that it is equal to or less than the mass median diameter (as described above) of particles in the first aerosol.

The inner surface <NUM> comprises a smooth polished surface between the grooves <NUM>. Polishing the surface in this way provides improved aerodynamic properties. However, in other examples, the inner surface <NUM> may be textured. In such examples, the texture of the surface may provide the uneven surface, and no grooves are required,.

In use, the uneven nature of the inner surface <NUM> makes it easier for droplets to form on the inner surface <NUM>, preventing large droplets from entering the user's mouth. The grooves <NUM> help to channel the large droplets back into the consumable.

Referring to <FIG> there is shown a sectional drawing of a second flavour pod portion <NUM>. The second flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many of the reference numerals relating to features which are common between the second flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The second flavour pod portion <NUM> comprises a second barrier arrangement <NUM> for inhibiting evaporation of aerosol precursor when the second barrier arrangement <NUM> is closed. The second barrier arrangement <NUM> does not inhibit flow between the first storage and the member <NUM>, which means that the member <NUM> contains aerosol precursor even when the second barrier arrangement <NUM> is closed. The second barrier arrangement <NUM> comprises a valve <NUM> which is located in the outlet <NUM> of the second flavour pod portion <NUM>. The valve <NUM> is a diaphragm valve. The valve <NUM> substantially seals the outlet <NUM>.

In use, the user inhales on the mouthpiece, which causes the second barrier arrangement <NUM>/valve <NUM> to open, permitting aerosol to flow out of the outlet <NUM>. The second barrier arrangement <NUM> closes when the user stops inhaling.

Referring to <FIG> there is shown a sectional drawing of a third flavour pod portion <NUM>. The third flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many of the reference numerals relating to features which are common between the second flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The third flavour pod portion <NUM> comprises a third barrier arrangement <NUM> for inhibiting evaporation of aerosol precursor when the third barrier arrangement <NUM> is closed. As with the second barrier arrangement <NUM>, the third barrier arrangement <NUM> does not inhibit flow between the first storage and the member <NUM>, which means that the member <NUM> contains aerosol precursor even when the third barrier arrangement <NUM> is closed. The third barrier arrangement <NUM> is a shield <NUM>. The shield <NUM> is formed of a plastic material. The shield <NUM> encloses the member <NUM> when the shield <NUM> is closed.

The shield <NUM> comprises four curved plates <NUM>. When the shield <NUM> opens, the curved plates <NUM> separate and slide to expose the member <NUM> to permit generation of aerosol.

Referring to <FIG> there are shown cross sectional drawings of a fourth flavour pod portion <NUM> in deactivated and activated states respectively. The fourth flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many features and reference numerals relating to features which are common between the fourth flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The fourth flavour pod portion <NUM> comprises a fourth barrier arrangement <NUM> and a second storage <NUM>. The fourth barrier arrangement <NUM> is configured to inhibit the flow of aerosol precursor from the storage <NUM> to the transfer element <NUM> (i.e. the member <NUM>) when the barrier arrangement is in a closed position, as shown in <FIG>. The fourth barrier arrangement <NUM> comprises a barrier element <NUM>. The barrier element <NUM> is fixed to an end portion of the member <NUM>. The barrier element <NUM> encloses the end portion of the member <NUM>.

The member <NUM> and the barrier element <NUM> are located in a tube <NUM>. The barrier element <NUM> blocks the tube <NUM> to prevent flow of aerosol precursor to the tube <NUM> when the fourth barrier arrangement <NUM> is in the closed position. The barrier element <NUM> comprises an o-ring <NUM>, which extends around the member <NUM> to seal the tube <NUM>.

In order to open the fourth barrier arrangement <NUM>, the user slides the mouthpiece (not shown) to effect sliding of the member <NUM> and the barrier element <NUM>. This causes the barrier element <NUM> and a side portion <NUM> of the member <NUM> to leave the tube <NUM>, thereby exposing the side portion <NUM> to the aerosol precursor in the storage <NUM>. Aerosol precursor then moves from the storage <NUM> and into the member for aerosolisation. <FIG> shows the fourth barrier arrangement <NUM> in the open position.

The fourth barrier arrangement <NUM> can then be closed by the user by sliding the mouthpiece (or in other examples a switch) in the opposite direction. This returns the member <NUM> and the barrier element <NUM> to the tube <NUM> such that the barrier element <NUM> seals the tube <NUM> again. In this way, the fourth barrier arrangement <NUM> is selectively openable and closable by the user. If the fourth barrier arrangement <NUM> is closed again, aerosol will be produced for a small number of "puffs" before the aerosol precursor in the member <NUM> is depleted. The user can then choose to open the fourth barrier arrangement <NUM> if required.

Referring to <FIG> there are shown cross sectional drawings of a further consumable <NUM> comprising a fifth flavour pod portion <NUM> in activated and deactivated states respectively. The fifth flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many of the reference numerals relating to features which are common between the fifth flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The fifth flavour pod portion <NUM> comprises a storage <NUM> and an additional storage <NUM>. The storage <NUM> is a free liquid tank and the additional storage <NUM> is a porous reservoir. Aerosol precursor is initially stored in the storage <NUM> with the additional storage <NUM> empty.

The fifth flavour pod portion <NUM> comprises a fifth barrier arrangement <NUM> for inhibiting evaporation of aerosol precursor when the fifth barrier arrangement <NUM> is closed. The fifth barrier arrangement <NUM> inhibits evaporation of aerosol precursor by preventing flow of aerosol precursor between the storage <NUM> and the additional storage <NUM>. As can be seen in <FIG>, when the fifth barrier arrangement is closed, the member <NUM> is located within and in contact with the empty additional storage <NUM>. The member <NUM> is distinct from the storage <NUM>.

When the fifth barrier arrangement is closed, the member <NUM> is not in contact with the storage <NUM>. The fifth barrier arrangement <NUM> comprises a pierceable substrate (in this example a foil substrate) located between the storage <NUM> and the additional storage <NUM>.

As before, to open the fifth barrier arrangement <NUM>, the mouthpiece <NUM> is moved relative to a body of the further consumable <NUM>, which effects relative movement between the liquid transfer element (i.e. the member <NUM>) and the fifth barrier arrangement <NUM>. The movement of the member <NUM> causes the member to pierce the substrate of the fifth barrier arrangement <NUM>, thereby opening the fifth barrier arrangement <NUM>. This allows aerosol precursor to flow from the storage <NUM> to the additional storage <NUM> and into the member <NUM> for aerosolisation.

The user may need to turn the further consumable <NUM> upside down in order to move aerosol precursor to the additional storage <NUM>. Aerosol precursor is then held in the porous reservoir of the additional storage <NUM>. The fifth barrier arrangement <NUM> remains permanently open after opening.

Referring to <FIG> there is shown a sectional drawing of a sixth flavour pod portion <NUM> in a deactivated and activated state respectively. The sixth flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many of the reference numerals relating to features which are common between the sixth flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The sixth flavour pod portion <NUM> comprises a sixth barrier arrangement <NUM> and a storage <NUM>. As with the first barrier arrangement, the sixth barrier arrangement <NUM> comprises a plug <NUM> located at one of the tube <NUM> when the sixth barrier arrangement <NUM> is in the closed position as shown in <FIG>. However, unlike the first barrier arrangement, the sixth barrier arrangement <NUM> is openable by moving the storage <NUM> with respect to the sixth barrier arrangement <NUM>. More specifically, the sixth barrier arrangement <NUM> is openable by sliding the storage <NUM> with respect to the sixth barrier arrangement <NUM>.

Since the tube <NUM> is integrally formed with the storage <NUM>, moving the storage <NUM> in this way causes relative movement between the storage <NUM> and the member <NUM>, causing the member <NUM> to displace the plug <NUM> from the tube <NUM> to open the sixth barrier arrangement <NUM>. The member <NUM> is held in position relative to the mouthpiece by the second supporting portion <NUM>.

The sixth flavour pod portion <NUM> comprises a switch <NUM>. The switch <NUM> is located on a front face of the sixth flavour pod portion <NUM>. As shown in <FIG>, the switch <NUM> is slidable. Sliding of the switch <NUM> effects sliding of the storage <NUM> to open the sixth barrier arrangement <NUM>.

The sixth flavour pod portion <NUM> comprises a blocking arrangement <NUM>. The blocking arrangement <NUM> inhibits flow through the pressure relief opening <NUM> when the blocking arrangement <NUM> is in the closed position as in <FIG>.

When the sixth barrier arrangement <NUM> is in the closed position as in <FIG>, the blocking arrangement <NUM> is connected to the switch <NUM> and the storage <NUM>. This means that sliding of the switch <NUM> causes sliding of the blocking arrangement <NUM>, which in turn causes sliding of the storage <NUM>.

The sixth flavour pod portion <NUM> comprises a stop (not shown). The stop prevents the storage moving beyond a point. Beyond this point, further moving of the switch <NUM> causes the blocking arrangement <NUM> to disconnect from the storage <NUM>. This causes the blocking arrangement <NUM> to move away from the pressure relief opening <NUM> to open the blocking arrangement <NUM>.

Referring to <FIG> there is shown a sectional drawing of a seventh flavour pod portion <NUM>. The seventh flavour pod portion <NUM> comprises all of the features of the flavour pod portion <NUM> aside from the differences described here. Many of the reference numerals relating to features which are common between the seventh flavour pod portion <NUM> and the flavour pod portion <NUM> are omitted from <FIG> for clarity. However, like reference numerals are used in <FIG> where features referred to previously are referred to again.

The seventh flavour pod portion <NUM> does not comprise a barrier arrangement as described previously, including only a second blocking arrangement <NUM>. The second blocking arrangement also inhibits evaporation from the aerosol generator portion (by preventing air flow into the storage), in some cases to a sufficient extent.

The second blocking arrangement <NUM> comprises first and second blocking plates <NUM>, <NUM>. The first and second blocking plates <NUM>, <NUM> are rotatable relative to each other to selectively line up apertures in the first and second blocking plates <NUM>, <NUM>. When the apertures in the first and second blocking plates <NUM>, <NUM> are lined up, a pressure relief valve (i.e. permitting air flow into the storage) is opened. The first blocking plate <NUM> is fixed to the mouthpiece. In this way, rotation of the mouthpiece relative to the body of the device permits selective opening of the second blocking arrangement <NUM>.

<FIG> shows a cross-sectional view of a flavour pod portion <NUM> of a consumable. As before, member <NUM> functions as a passive aerosol generator and is formed of a porous material. The member includes an aerosol generator portion <NUM>, located within airflow passage <NUM>, and is supported via supporting portion <NUM>. The member <NUM> is partially located within the first storage <NUM> which stores a first aerosol precursor. In the state shown in <FIG>, the member is fluidly isolated from the first aerosol precursor by frangible seal <NUM>. In this example, the frangible seal <NUM> is a cylindrical glass tube which seals member <NUM> from the contents of the first storage <NUM>.

In use, the user applies a force to the first storage <NUM> (for example, by squeezing the casing of the flavour pod <NUM>) which in turn applies a force to the frangible seal <NUM>. Advantageously, the first storage <NUM> containing first aerosol precursor is, before activation, substantially full of first aerosol precursor such that the squeezing force is efficiently transferred to the frangible seal <NUM> (the first aerosol precursor being, in this example, an essentially incompressible liquid).

Moreover, there is, in this example, a void <NUM> containing air or another gas and notably not containing any portion of the member <NUM>. Advantageously, this can help ensure that the frangible seal breaks with less application than if the member <NUM> extended all of the way to a base of the first storage <NUM> i.e. the user does not need to apply a force sufficient to compress the member <NUM>, but rather just compress the gas within void <NUM>. However in other examples (not shown) the member <NUM> extends to the base of the first storage <NUM> such that there is no void <NUM> present. The features disclosed in the foregoing description, or in the following claims, or in the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for obtaining the disclosed results, as appropriate, may, separately, or in any combination of such features, be utilised for realising the disclosure in diverse forms thereof.

While the invention has been described in conjunction with the exemplary embodiments described above, many equivalent modifications and variations will be apparent to those skilled in the art when given this disclosure. Accordingly, the exemplary embodiments of the invention set forth above are considered to be illustrative and not limiting. Various changes to the described embodiments may be made without departing from the scope of the invention as defined in the appended claims.

Claim 1:
An aerosol delivery device comprising:
a storage (<NUM>) for storing an aerosol precursor;
an aerosol generator (<NUM>) comprising an aerosol generator portion (<NUM>) configured to receive the aerosol precursor from the storage, the aerosol generator being a passive aerosol generator such that the air directed past the aerosol generator portion picks up the aerosol precursor from the aerosol generator portion to form an aerosol;
an air flow passage (<NUM>) configured to direct air past the aerosol generator portion;
characterized in that:
the device further comprises a barrier arrangement (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) for inhibiting evaporation of aerosol precursor when the barrier arrangement is closed, the barrier arrangement being openable to permit generation of aerosol, wherein the barrier arrangement (<NUM>) comprises a barrier element between the aerosol generator portion and a mouthpiece aperture of the aerosol delivery device to inhibit evaporation of aerosol precursor.