TECHNICAL FIELD

[0001] The present invention relates to personal vaporizers, and in particular, although not exclusively, electronic cigarettes.

BACKGROUND ART

[0002] Electronic cigarettes generally comprise battery powered vaporizers, also called atomizers, which attempt to mimic traditional cigarettes by providing a vapour instead of smoke. The vapour may resemble tobacco smoke in flavour, or be of another flavour altogether.

Furthermore, the vapour may include nicotine, for example at similar levels as tobacco smoke, or be free of nicotine.

[0003] One advantage of electronic cigarettes over traditional cigarettes is that the vapour typically does not contain by-products from combustion that are generally present in cigarette smoke. Typically, an electronic cigarette contains a liquid (liquid or "juice") which is vaporised by a heated coil. The liquid generally comprises Vegetable Glycerine (VG), Propylene Glycol (PG), flavour and optionally nicotine.

[0004] The vaporisation of electronic cigarettes (as opposed to burning of a traditional cigarette) enables a wide range of flavours to be used, including fruity flavours, sweet flavours, and flavours that imitate different types of tobacco. Furthermore, rates of nicotine can be easily adjusted, as can the composition of the liquid (e.g. VG/PG ratio) to provide different user experiences. As such, vapers (i.e. smokers of electronic cigarettes) are faced with a plethora of choices when it comes to selection of liquid for an electronic cigarette.

[0005] However, a problem with electronic cigarettes of the prior art is that it is impractical to change the liquid in the electronic cigarette to change the user's experience as desired. As a result, vapers generally only change types of liquid when refilling an electronic cigarette (or changing a disposable cartridge), or alternatively by having a secondary electronic cigarette device or cartridge for the second flavour.

[0006] As such, vapers are generally unable to control the experience provided by electronic cigarettes as desired. Accordingly, there is a need for an improved electronic smoking device. [0007] It will be clearly understood that, if a prior art publication is referred to herein, this reference does not constitute an admission that the publication forms part of the common general knowledge in the art in Australia or in any other country.

SUMMARY OF INVENTION

[0008] The present invention in one preferred aspect of the present disclosure sets forth a cartridge for an electronic cigarette, vaporiser, or vaping device. The cartridge has one or more reservoirs for holding liquid to be vaporized. The cartridge has first and second heating elements configured to vaporize liquid. The cartridge has an electrical circuit for selectively activating the first and second heating elements in different modes. The electrical circuit includes two or more electrical contacts. The electrical circuit is configured so that the manner in which electrical energy is applied across or between the two or more electrical contacts determines which of the first and second heating elements are activated in the different modes.

[0009] The electrical circuit may be configured for selectively activating the first and second heating elements by polarity switching of the electrical energy applied across or between two of the two or more electrical contacts. Polarity switching includes the change or reversal in the direction of the current in the electrical circuit. The manner in which electrical energy is applied across the two electrical contacts may be the polarity of the electrical energy applied across or between the two electrical contacts, so that at least one of the first and second heating elements is activated only when the electricity or current passing through the electrical circuit is in a particular direction. The electrical circuit may include at least one diode configured to prevent the flow of the electricity or current in one direction through at least part of the electrical circuit.

[0010] The electrical circuit may include three or more electrical contacts. The electrical circuit may be configured so that the first and second heating elements are selectively activated in the different modes based on the combination of electrical contacts across or between which the electrical energy is applied. The manner in which the electrical energy is applied across or between the three or more electrical contacts may be the combination of the electrical contacts across or between which the electrical energy is applied.

[0011] The electrical circuit may be configured so that in a first mode only the first heating element is activated, and in a second mode both the first and second heating elements are activated. The electrical circuit may be configured so that in a first mode only the first heating element is activated, and in a second mode only the second heating element is activated.

[0012] The cartridge may include first and second wick elements which may extend from the one or more reservoirs to the first and second heating elements to allow flow of the liquid to be vaporised from the one or more reservoirs to the first and second heating elements, respectively.

[0013] In another preferred aspect, the present disclosure sets forth a cartridge for an electronic cigarette or vaping device. The cartridge has a reservoir for holding liquid to be vaporized. The cartridge has first and second heating elements configured to vaporize liquid. The cartridge has first and second wick elements extending from the reservoir to the first and second heating elements to allow flow of the liquid to be vaporised from the reservoir to the first and second heating elements, respectively. The cartridge has an electrical circuit configured to activate the first heating element independently of the second heating element.

[0014] The cartridge may have two or more reservoirs. The cartridge may have a channel along which air can be drawn for inhalation, the first and second heating elements being positioned one after the other along the channel. The two or more reservoirs may be of different size and/or capacity.

[0015] In another preferred aspect, the present disclosure sets forth a cartridge for an electronic cigarette or vaping device. The cartridge has a reservoir for holding liquid to be vaporized. The cartridge has first and second heating elements configured to vaporize liquid. The cartridge has first and second wick elements extending from the reservoir to the first and second heating elements to allow flow of the liquid to be vaporised from the reservoir to the first and second heating elements, respectively. The cartridge has an electrical circuit configured to activate the first heating element independently of the second heating element.

[0016] The first and second wick elements may extend from the one or more reservoirs to the first and second heating elements to allow flow of the liquid to be vaporised from the one or more reservoirs to the first and second heating elements, respectively. The cartridge may have a single reservoir or different reservoirs from which the first and second wick elements extend. The first and second wick elements may extend across the channel. The channel may extend through the one or more reservoirs. [0017] In another preferred aspect, the present disclosure sets forth an electronic cigarette or vaping device including a cartridge as defined and described hereinabove and a control module coupled to the electrical circuit of the cartridge to control activation of the first and second heating elements.

[0018] The control module of the electronic cigarette or vaping device may include a user interface for providing input from a user. The cartridge and the control module may be integrated.

[0019] In another preferred aspect, the present disclosure sets forth a control module for an electronic cigarette or vaping device.. The control module is configured to supply electrical power to an electrical circuit of a cartridge in a manner to activate first and second heating elements of the cartridge independently from each other based on the manner in which the electrical power is supplied to the electrical circuit by the control module.

[0020] The control module may be operable to supply the electrical power in a manner which includes switching the polarity of electrical energy supplied by the control module to the electrical circuit. The control module may include a user interface for providing input from a user to change the polarity of the electrical energy supplied by said control module.

[0021] The control module may include three or more electrical contacts to contact three or more corresponding electrical contacts of the electrical circuit. The control module may be operable in a manner which includes selecting across or between which electrical contacts of said control module electrical energy is supplied to power the cartridge. The control module may include a user interface for providing input from a user to change the combination of the electrical contacts across or between which electrical energy is supplied to power the cartridge.

[0022] In another aspect, the present invention resides broadly in a cartridge for an electronic cigarette or vaping device, the cartridge including:

first and second vaporisers, for generating vapour for inhalation by a user; wherein at least one of the first and second vaporisers is adjustable to provide more than one vapour generation configuration.

[0023] The cartridge enables the user to easily switch between different vaping experiences without the need for maintenance of several cartridges or electronic cigarettes. [0024] The cartridge may include a configuration where the first and second vaporisers operate differently to each other.

[0025] The second vaporiser may be switchable between first and second modes, to provide first and second vapour generation configurations. The second vaporiser may be switchable independently of the first vaporiser.

[0026] The first and second vaporisers may be switchable between first and second modes, to provide the first and second vapour generation configurations. The first mode of the first vaporiser may be different to the first mode of the second vaporiser. Operation of the first and second vaporisers may be mutually exclusive.

[0027] The cartridge may include a reservoir, for storing a first liquid for vaporisation by the first vaporiser. The cartridge may include the first liquid.

[0028] The cartridge may include a second reservoir, for storing a second liquid for vaporisation by the second vaporiser. Alternatively, the first liquid may be for vaporisation by the first vaporiser and the second vaporiser.

[0029] The reservoir may contain a first type (e.g. nicotine or nicotine free) or flavour of vaporisation liquid and the second reservoir may contain a second type or flavour of vaporisation liquid.

[0030] The first and second vapour generation configurations may provide variable vapour intensity to the user. The first vapour generation configuration may comprise a low vapour generation configuration and the second vapour generation configuration may comprise a high vapour generation configuration. The vapour of the low and high vapour generation

configurations may both be generated from the first liquid.

[0031] The variable vapour intensity can be useful in several scenarios. For example, a user wishing to increase the quantity of vapour generated may switch between vapour of high and low quantity when needed.

[0032] The first and second vapour generation configurations may provide switching of vapour type or vapour flavour. The first vapour generation configuration may comprise a first flavour or type generation configuration and the second vapour generation configuration may comprise a second flavour or type generation configuration. The vapour from first flavour or type generation configuration may be from the first liquid and the vapour of the second vapour generation configuration may be from the second liquid.

[0033] The switching of vapour type or vapour flavour can be useful in several scenarios. For example, a user wishing to cut back on nicotine intake may switch between vapour of high and low (or zero) nicotine levels when needed. Also, different flavours can be selected to dynamically change the vaping experience.

[0034] The first and second vapour generation configurations may provide enhancement of one vapour type or flavour with another vapour type or flavour. The vapour of the first flavour generation configuration may be from the first liquid and the vapour of the second vapour generation configuration may be from the first liquid and the second liquid.

[0035] The switching of vapour type or vapour flavour can be useful in several scenarios. For example, a user may choose to selectively have a flavour hit of a secondary flavour, such as menthol, over their primary flavour. Alternatively, the user may choose to selectively provide an additional hit of nicotine. As another example, the user may selectively provide a boost of the quantity of vapour generated.

[0036] The first and second vaporisers may comprise heating elements, for heating the first and/or second liquid. The heating elements may comprise coils.

[0037] The cartridge may include a first wick, configured to enable the first liquid to flow from the reservoir to the first vaporiser. The cartridge may include a second wick. The second wick may be configured to enable the first liquid to flow from the reservoir to the second vaporiser. Alternatively, the second wick may be configured to enable the second liquid to flow from the second reservoir to the second vaporiser.

[0038] The cartridge may include connectors for coupling the vaporisers to a power source.

[0039] At least one of the first and second vaporisers may be adjustable (e.g. selectable) by switching the polarity of the electrical energy across or between the connectors.

[0040] The cartridge may include a circuit coupling the connectors to the second vaporiser, the circuit including at least one diode configured to prevent the flow of current in one direction to the second vaporiser.

[0041] The cartridge may be disposable. Alternatively, the cartridge may be refillable.

[0042] According to a another aspect, the present invention resides broadly in a control module for an electronic cigarette or vaping device including a cartridge as described

hereinabove, the control module including:

a user interface, for providing input from a user; and

control circuitry coupled to the user interface configured to control selection of the at least first and second vapour generation configurations.

[0043] The user interface may comprise a button. The user interface may comprise a binary switch configured to provide selection between the first and second vapour generation configurations. The user interface may comprise a smart switch having two or more

configurations.

[0044] The control module may include a power source, for providing power to the cartridge. The power source may comprise a battery.

[0045] The control circuitry may be configured to control adjustment of the at least one of the first and second vaporisers by changing a polarity of power to the cartridge.

[0046] The control module may include one or more lights, configured to provide feedback to the user regarding selection of the at least first and second vapour generation configurations.

[0047] According to another aspect, the present invention resides broadly in an electronic cigarette including a cartridge of the first aspect and a control module of the second aspect.

[0048] According to a last aspect, the present invention resides broadly in a personal vaporizer including:

first and second vaporisers, for generating vapour for inhalation by a user; wherein at least one of the first and second vaporisers is adjustable to provide at least first and second vapour generation configurations.

[0049] Any of the features described herein can be combined in any combination with any one or more of the other features described herein within the scope of the invention. [0050] The reference to any prior art in this specification is not, and should not be taken as an acknowledgement or any form of suggestion that the prior art forms part of the common general knowledge.

[0051] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. In the present specification and claims, the word "comprising" and its derivatives including "comprises" and "comprise" include each of the stated integers, but does not exclude the inclusion of one or more further integers.

[0052] The claims as filed and attached with this specification are hereby incorporated by reference into the text of the present description.

[0053] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the invention and together with the description, serve to explain the principles of the invention.

BRIEF DESCRIPTION OF DRAWINGS

[0054] Various embodiments of the invention will be described with reference to the following drawings, in which:

[0055] FIG. 1 illustrates a cartridge of an electronic cigarette or vaping device, according to an embodiment of the present invention;

[0056] FIG. 2 illustrates a control module of an electronic cigarette or vaping device, according to an embodiment of the present invention;

[0057] FIG. 3 illustrates a cartridge of an electronic cigarette or vaping device, according to an alternative embodiment of the present invention;

[0058] FIG. 4 illustrates a cartridge of an electronic cigarette or vaping device, according to yet another alternative embodiment of the present invention;

[0059] FIG. 5 illustrates a cartridge of an electronic cigarette or vaping device, according to an embodiment of the present invention; [0060] FIG. 6 illustrates a control module, according to an embodiment of the present invention;

[0061] FIG. 7 illustrates a cartridge of an electronic cigarette or vaping device, according to an embodiment of the present invention; and

[0062] FIG. 8 illustrates a control module, according to an embodiment of the present invention.

[0063] Preferred features, embodiments and variations of the invention may be discerned from the following Detailed Description which provides sufficient information for those skilled in the art to perform the invention. The Detailed Description is not to be regarded as limiting the scope of the preceding Summary of the Invention in any way.

DESCRIPTION OF EMBODIMENTS

[0064] FIG. 1 illustrates a cartridge 100 of an electronic cigarette, according to an embodiment of the present invention. The cartridge 100 enables configurable vapour intensity. For example, the cartridge, together with a suitable control module, enables a user to control the user experience provided by the electronic cigarette.

[0065] The cartridge 100 includes a reservoir 105, for storing liquid (commonly referred to as "juice). The liquid generally comprises Vegetable Glycerine (VG), Propylene Glycol (PG), flavour and optionally nicotine.

[0066] A first wick 110a extends from the reservoir 105 and enables the flow of liquid from the reservoir 105 to a first coil 115a by capillary action. The first coil 115a heats the liquid which causes the liquid to vaporize, which vaporized liquid is inhaled by the user.

[0067] Similarly, a second wick 110b extends from the reservoir 105 and enables the flow of liquid from the reservoir 105 to a second coil 115b. The second coil 115b can also heat the liquid which causes the liquid to vaporize.

[0068] In a low vapour configuration, only the first coil 115a is activated, and in a high vapour configuration the first and second coils 115a, 115b are activated. As discussed in further detail below, the user may be able to dynamically select between the low vapour configuration and the high vapour configuration based upon user preference. Alternatively, a controller may automatically switch between vapour configurations provided by the user.

[0069] The first coil 115a is electrically coupled to a first electrical contact 120a and a second electrical contact 120b by a bidirectional circuit 125a. As such, the first coil 115a is activated regardless of the polarity of electricity supplied, and hence the direction of electricity flow or current in circuit 125a, by a power source in relation to the first and second electrical contacts 120a, 120b.

[0070] In contrast, the second coil 115b is electrically coupled to the first electrical contact 120a and the second electrical contact 120b by a unidirectional circuit 125b. As such, the second coil 115b is activated only when the power source is coupled to the first and second electrical contacts 120a, 120b to supply electrical energy at a first polarity, thereby making the electricity or current in circuit 125b flow in a first direction. The unidirectional circuit 125b is formed by a diode 130 which is coupled in series with the second coil 115b.

[0071] The bidirectional circuit 125 a and the unidirectional circuit 125b together form an electrical circuit 126 of the cartridge 100. The electrical circuit 126 has the first and second electrical contacts 120a, 120b.

[0072] As such, the second coil 115b, and thus the high vapour configuration can be activated by switching a polarity of an electrical supply coupled to the first and second electrical contacts 120a, 120b. Switching or reversing the polarity of the electricity supply includes switching the polarity of the voltage applied across or between the first and second electrical contacts 120a, 120b. The manner in which power is supplied to the first and second electrical contacts 120a, 120b includes the polarity of the supplied electricity, such that the manner of electrical energy supply changes by switching the polarity of the electrical energy applied across or between first and second electrical contacts 120a, 120b. As discussed, such polarity switching may be controlled manually by the user, automatically by a controller, or a combination thereof.

[0073] The cartridge 100 further includes a first end 135 comprising a mouthpiece and a second end 140 comprising a connector for connecting to a control module, as discussed below. The cartridge further includes apertures 145, for enabling air to enter the cartridge, flow along a central channel 150 past the first and second coils 115a, 115b, and out through the mouthpiece for inhalation by the user. The first and second coils 115a, 115b are positioned one after the other along the central channel 150. It is not necessary for the central channel 150 to be straight as shown in the drawings, it may follow a curved, serpentine or irregular path.

[0074] The first and second wicks 110a, 110b extend across the central channel 150.

[0075] The connector comprises a threaded coupling 155, for releasably connecting the cartridge 100 to the control module. When connected to a control module, the first and second electrical contacts 120a, 120b are electrically coupled to corresponding contacts of the control module. According to an alternative embodiment, the connecter may include a mechanical connector such as, but not limited to, a snap-fit coupling or a latch. Alternatively, the connector may be formed as a magnetic coupling if desired.

[0076] Finally, the connector comprises a pressure coupling portion 160, coupling the channel 150 to the control portion. As such, an internal pressure of the cartridge 100 can be transferred to the control portion, to enable pressure based control of the vaporisers 115a, 115b.

[0077] As will be readily understood by the skilled addressee, the reservoir 105 may include filler (also referred to as stuffing, batting, fiber or wool), which is soaked with the liquid. The filler may prevent the liquid from spilling from the cartridge.

[0078] FIG. 2 illustrates a control module 200 of an electronic cigarette, according to an embodiment of the present invention. The control module 200 can be coupled to the cartridge 100, 300, 400, 500 to form an electronic cigarette or vaping device.

[0079] The control module 200 includes a battery 205, electrically coupled a first electrical contact 210a and a second electrical contact 210b. The first and second contacts 210a, 210b are configured to electrically couple to the first and second electrical contacts 120a, 120b of the cartridge 100. As such, the battery 205 is able to power the coils 115a, 115b.

[0080] The control module 200 includes a pressure switch 215, which is activated with a user draws back on the electronic cigarette. As discussed above, the pressure of the cartridge 100 is transferred to the control module 200, and thus the pressure switch 215, by the pressure coupling portion 160 of the cartridge 100. When the pressure switch 215 is activated, power is supplied to the coil(s) 115a, 115b of the cartridge 100, and consequently vapour is generated.

[0081] The pressure switch 215 enables vapour to be generated only when a user draws on the electronic cigarette, mimicking behaviour of a traditional cigarette. [0082] The control module 200 further includes a manual switch 220, which enables the user to control the manner in which electrical energy is fed to the vaporising cartridge 100, which in turn enables the user to switch between different vapour modes.

[0083] According to certain embodiments, the switch 220 is a smart switch, which enables the user to switch between more than two different vapour modes. For example, each time the user pushes the switch 220, the control module 200 may toggle between a plurality of modes. Similarly, by holding the switch 220 down, or pushing the switch several times in fast succession, different modes may be selected.

[0084] Finally, LED indicator lights 225 are provided at a tip of the control module (which forms a tip of the electronic cigarette when assembled). The LED indicator lights 225 are coupled to the circuit powering the cartridge 100, and thus illuminate when power is provided to the cartridge 100.

[0085] As will be readily appreciated by the skilled addressee, the LED indicator lights 225 may be provided at any suitable position on the control module. For example, the LED indicator lights 225 may be located in association with the switch 220.

[0086] According to certain embodiments, the LED indicator lights 225 comprise first and second indicator lights that are couped to the circuit powering the cartridge 100 with opposite polarities. As such, only one of the first and second indicator lights is activated depending on a polarity of electrical energy supplied the circuit.

[0087] The LED indicator lights 225 may comprise different coloured indicator lights that are selectively activated to indicate to the user whether the cigarette is in a first or second vapour mode. As such, visual feedback of the selected mode of the device may be provided to the user.

[0088] According to certain embodiments, the control module 200 may modulate the polarity of the voltage or current provided to the cartridge 100. By electronically modulating the polarity of the voltage or current, a blend of the two configurations can also be achieved increasing the number of possible combinations. The control module 200 is operable to supply power to the cartridge 100 in a manner which includes switching the polarity of the electrical energy supplied across or between first and second contacts 210a, 210b of control module 200 to cartridge 100. According to some embodiments, the control module 200 may include a plurality of predefined configurations, which may include automatically switching between configurations. For example, the control module may be configured to gradually switch between a nicotine containing liquid and a non-nicotine containing liquid to assist a user in decreasing their nicotine intake. Alternatively, the control module may be configured to automatically combine different flavours to provide an enhanced flavour experience.

[0089] FIG. 3 illustrates a cartridge 300 of an electronic cigarette, according to an embodiment of the present invention. The cartridge 300 is similar to the cartridge 100, but enables the user to switch between first and second liquid reservoirs, which may contain different types or flavours of liquid.

[0090] In particular, the cartridge 300 includes a first reservoir 305a, for storing a first flavour or type of liquid and a second reservoir 305b, for storing a second flavour or type of liquid.

[0091] A first wick 310a extends from the first reservoir 305a and enables the flow of liquid from the first reservoir 305a to a first coil 115a by capillary action. Similarly, a second wick 310b extends from the second reservoir 305b and enables the flow of liquid from the second reservoir 305b to a second coil 115b. The first and second wicks 310a, 310b extend across the central channel 150

[0092] In a first configuration, only the first coil 115a is activated, and in a second configuration only the second coil 115b is activated. The user (or a control module) is thus able to dynamically select between different flavours or types of liquid, for example based upon user preference.

[0093] The first reservoir 305a is approximately the same size of the second reservoir 305b. However, the skilled addressee will readily appreciate that one of the reservoirs 305a, 305b may be larger than the other, particularly if one flavour is known to be more popular than the other.

[0094] The first coil 115a is electrically coupled to the electrical contacts 120a, 120b by first unidirectional circuit 325a enabling current to flow only in a first direction, and the second coil 115b is electrically coupled to the electrical contacts 120a, 120b by second unidirectional circuit 325b enabling current to flow only in a second direction that is opposite to the first direction. Operation of the first and second coils 115a, 115b is thus mutually exclusive. [0095] The first unidirectional circuit 325a and the second unidirectional circuit 325b together form an electrical circuit 326 of the cartridge 300. The electrical circuit 326 has the first and second electrical contacts 120a, 120b via which electrical power is supplied to the electrical circuit 326.

[0096] As such, different flavours or types of liquid can be selected by switching the direction of the current in the cartridge 300 by switching the polarity of the electrical energy applied across the first and second electrical contacts 120a, 120b.

[0097] FIG. 4 illustrates a cartridge 400 of an electronic cigarette, according to an embodiment of the present invention. The cartridge 400 is similar to the cartridges 100, 300, but enables the user (or control module) to selectively add a second type or flavour of liquid to a primary type or flavour of liquid, for example providing a user configurable flavour or nicotine hit.

[0098] The cartridge 400 includes a first reservoir 405a, for storing a first flavour or type of liquid and a second reservoir 405b, for storing a second flavour or type of liquid, first and second wicks 310a, 310b and first and second coils 115a, 115b, in a similar manner to the cartridge 300 of FIG. 3.

[0099] However, in a first configuration, only the first coil 115a is activated, and in a second configuration both the first and second coils 115a, 115b are activated. The user is thus able to dynamically add a second flavour or types of liquid when desired.

[00100] The first coil 115a is electrically coupled to the electrical contacts 120a, 120b by a bidirectional circuit 125a enabling current to flow in both directions, and the second coil 115b is electrically coupled to the electrical contacts 120a, 120b by a unidirectional circuit 125b enabling current to flow only in one direction.

[00101] As such, an additional flavour or type of liquid can be added by switching the direction of the current in the cartridge 400.

[00102] The first reservoir 405a is larger than the second reservoir 405b as consumption of the liquid of the first reservoir 405a is more than that of the second reservoir 405b.

[00103] The skilled addressee will readily appreciate that the number of coils and/or reservoirs in the cartridges 100, 300, 400 may be increased to provide further control to the user in relation to strength and/or flavour.

[00104] According to certain embodiments, the cartridges 100, 300, 400 are disposable. Alternatively, the cartridges 100, 300, 400 are refillable.

[00105] FIG. 5 illustrates a cartridge 500 of an electronic cigarette or vaping device, according to an embodiment of the present invention. The cartridge 500 is similar to the cartridges 100, 300, 400, but comprises first and second cartridge portions 500a, 500b.

[00106] The cartridge 500 includes a first reservoir 505a in the first cartridge portion 500a, for storing a first flavour or type of liquid, and a second reservoir 505b in the second cartridge portion 500b, for storing a second flavour or type of liquid. A first wick 510a and a first coil 115a are used to vaporise fluid from the first reservoir 505a and a second wick 510b and a second coil 115b are used to vaporise fluid from the second reservoir 505b.

[00107] The first and second cartridge portions 500a, 500b are independently

interchangeable, and may contain different flavours or types of liquid. Suitably, the first and second cartridge portions 500a, 500b are structurally similar or identical to each other, which enables a single type of cartridge to be used for either of the first and second cartridge portions 500a, 500b.

[00108] The first and second cartridge portions 500a, 500b are coupled to each other by respective male coupling portions 515a and female coupling portions 515b. In particular, the male coupling portion 515a of the second cartridge portion 500b is coupled to the female coupling portion 515b of the first cartridge portion 500a. The male and female coupling portions 515a, 515b also provide an electrical coupling between the first and second cartridge portions 500a, 500b.

[00109] The male coupling portion 515a of the first cartridge 500a enables the cartridge 500 to be coupled to a control module, in a similar manner to as described above. Similarly, the female coupling portion 515b of the second cartridge 500b enables the cartridge 500 to be coupled to a mouthpiece 520.

[00110] Finally, the cartridge 500 includes circuitry for powering the coils 115a, 115b, similar to the circuits described above. The circuitry includes circuit control portions 525a, 525b, for controlling power to the first and second coils 115a, 115b respectively. The circuit control portions 525a, 525b may comprise diodes, for controlling power to the respective coils 115a, 115b based on a polarity of the electrical energy in the circuit, or any other suitable control means.

[00111] The circuitry includes electrical contacts 120a, 120b which have the same or similar functionality as described for the electrical contacts 120a, 120b of cartridges 100, 300, 400. The electrical contacts 120 and 120b form part of the male couplings 515a. The circuitry further includes electrical contacts 122a, 122b in the female couplings 515b, which electrically connect the first and second cartridge portions 500a, 500b together.

[00112] FIG. 6 illustrates a control module 600, according to an embodiment of the present invention. The control module is similar to the control module 200, but is manually controlled rather than controlled based upon pressure.

[00113] The control module 600 includes a battery 605, electrically coupled a first and second electrical contacts 610a and 610b. The first and second contacts 610a, 610b are configured to electrically couple to the cartridge 100, 300, 400 or 500. As such, the battery 605 is able to power the coils 115a, 115b.

[00114] The control module 600 includes a power switch 615, which is activated manually by the user to generate a vapour. When the power switch 615 is activated, power is supplied to one or both of the coils 115a, 115b of the cartridge 100, 300, 400, 500, and consequently vapour is generated.

[00115] The control module 600 further includes a mode switch 620, which enables the user to control the manner in which electricity is fed to the vaporising cartridge 100, 300, 400, 500, which in turn enables the user to switch between different vapour modes. As such, the mode switch may be used to selectively power one or both of the coils 115a, 115b, for example to generate a desired flavour. The mode switch 620 may comprise a smart switch, as discussed above to select among various flavour profiles.

[00116] Finally, LED indicator lights 225 are provided at a tip of the control module (which forms a tip of the electronic cigarette when assembled), as described above.

[00117] FIG. 7 illustrates a cartridge 700 of an electronic cigarette, according to an embodiment of the present invention. The cartridge 700 is similar to the cartridges 100, 300, 400, 500, but includes three electrical terminals or contacts 720a, 720b and 720c and no diodes. With reference to the preceding drawings, like reference numerals refer to like parts, unless otherwise specified. The use of common reference numerals is intended to be for convenience only and should not be regarded as limiting. For example, cartridge 700 is shown with a single reservoir 105, but in another embodiment may include dual reservoirs 305a, 305b as described for cartridge 300.

[00118] The coils 115a and 115b are electrically coupled to the electrical contacts 720a, 720b and 720c by an electrical circuit 726. The electrical circuit 726 enables electrical current to flow to both coils 115a and 115b. The selection of coils which are activated via circuit 726 is based on the combination of electrical contacts 720a, 720b, 720c across or between which electrical energy is applied as described in more detail below.

[00119] Electrical circuit 726 includes a first bidirectional circuit 725a and a second bidirectional circuit 725b. The circuits 725a and 725b are bidirectional, as there are no diodes in the circuits. The first coil 115a is electrically coupled to the first electrical contact 720a and the second electrical contact 720b by the first bidirectional circuit 725a. The second coil 115b is electrically coupled to the first electrical contact 720a and the third electrical contact 720c by the second bidirectional circuit 725b. The first and second bidirectional circuits 725a, 725b are also coupled to each other at junction 727 so that first coil 115a is coupled to third electrical contact 720c via second bidirectional circuit 725b. Second coil 115b is similarly coupled to second electrical contact 720b via first bidirectional circuit 725a.

[00120] The first electrical contact 720a is a common terminal of the first circuit 725a and second circuit 725b. The second electrical contact 720b is an active terminal of the first circuit 725a. The third electrical contact 720c is a switch terminal for the second circuit 725b. The manner in which the electrical energy is applied across the three electrical contacts 720a, 720b, 720c is the combination of electrical contacts 720a, 720b, 720c across which the electrical energy is applied.

[00121] Only the first coil 115a is activated when the power source is coupled to the first and second electrical contacts 720a, 720b to apply electrical energy across the first and second electrical contacts 720a, 720b only so that electrical current flows in the first circuit 725a. [00122] The first coil 115a and second coil 115b are both activated when the power source is coupled to all three electrical contacts 720a, 720b, 720c to apply electrical energy across the first and second electrical contacts 720a, 720b and also across the first and third electrical contacts 720a, 720c so that electrical current flows in the first and second circuits 725a, 725b.

[00123] In another embodiment, the first coil 115a and second coil 115b are both activated when the power source is coupled to the second and third electrical contacts 720b, 720c to apply electrical energy across the second and third electrical contacts 720b, 720c.

[00124] In still another embodiment, only the second coil 115b is activated when the power source is coupled to the first and third electrical contacts 720a, 720c to apply electrical energy across the first and third electrical contacts 720a, 720c.

[00125] The different modes in which first coil 115a and second coil 115b is activated depending on the combination of electrical contacts 720a, 720b and 720c over which electrical energy is applied is set out in the table below.

[00126] In other embodiment for the electrical circuit 726 as discussed, wherein the control module is configured to supply power over different pairs of the electrical contacts, the first and second coils 115a, 115b can be activated as set out in the table below.

[00127] FIG. 8 illustrates a control module 800, according to an embodiment of the present invention, to drive the cartridge 700. The control module 800 is similar to the control module 200, but is wired for manual control and control based upon pressure. With reference to the preceding drawings, like reference numerals refer to like parts, unless otherwise specified. The use of common reference numerals is intended to be for convenience only and should not be regarded as limiting.

[00128] The control module 800 includes a first electrical contact 810a, a second electrical contact 810b and a third electrical contact 810c. The electrical contacts 810a, 810b, 810c of the control module 800 correspond and cooperate with the electrical contacts 720a, 720b, 720c of the cartridge 700, respectively.

[00129] The first electrical contact 810a of control module 800 is electrically coupled to the first electrical contact 720a of cartridge 700, in use. The second electrical contact 810b of control module 800 is electrically coupled to the second electrical contact 720b of cartridge 700, in use. The third electrical contact 810c of control module 800 is electrically coupled to the third electrical contact 720c of cartridge 700, in use.

[00130] The pressure switch 215 is activated when a user draws back on the electronic cigarette. When the pressure switch 215 is activated, power is supplied from battery 205 across electrical contacts 810a and 810b, which are coupled to the electrical contacts 720a and 720b, so that the first coil 115a is activated. The primary coil, being first coil 115a, is thus activated by the pressure switch 215 to vaporize liquid.

[00131] Switch 220 is normally open. The user depresses switch 220 to close the switch and activate the second coil 115b. Electrical connection of battery 205 to third electrical contact 810c is via the switch 220. Battery 205 is electrically coupled to third electrical contact 810c only when switch 220 is activated. Closing switch 220 causes electricity to be supplied from battery 205 across first and third contacts 810a and 810c. In this arrangement the secondary coil, being second coil 115b, is activated by the user depressing the switch 220 on the control module 800.

[00132] In another embodiment, the control module 800 may also be configured to selectively provide power across first and second contact pair (810a + 810b), or first and third contact pair (810a + 820c), or second and third contact pair (810b + 810c).

[00133] Advantages of embodiments of the present invention include enabling the ability for the user to change flavours on the go - even during operation. This can include facilitating the user controlled combination of complimentary flavours (e.g., chocolate and mint). [00134] Embodiments of the present invention can be used to satisfy occasional nicotine cravings, as an instant hit of nicotine could be dispensed from the device and then be returned to a nicotine free configuration at the push of a button.

[00135] Embodiments of the present invention enable a secondary flavour (i.e. menthol burst to tobacco) to be selectively added, or flavours completely changed, without dismantling the device.

[00136] In turn, embodiments of the present invention may reduce the need to carry around different (or multiple) flavour cartridges.

[00137] Reference throughout this specification to One embodiment' or 'an embodiment' means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearance of the phrases 'in one embodiment' or 'in an embodiment' in various places throughout this specification are not necessarily all referring to the same embodiment.

Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more combinations.

[00138] In compliance with the statute, the invention has been described in language more or less specific to structural or methodical features. It is to be understood that the invention is not limited to specific features shown or described since the means herein described comprises preferred forms of putting the invention into effect. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims (if any)

appropriately interpreted by those skilled in the art.

[00139] Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.