WO2013171206A1

WO2013171206A1 - Electronic vapour provision device

Info

Publication number: WO2013171206A1
Application number: PCT/EP2013/059932
Authority: WO
Inventors: Christopher Lord
Original assignee: British American Tobacco (Nc) Limited
Priority date: 2012-05-14
Filing date: 2013-05-14
Publication date: 2013-11-21
Also published as: GB201208347D0; GB2502052A

Abstract

An electronic vapour provision device exemplified by an electronic cigarette comprises a body 4 and a mouthpiece 2, where the body 4 comprises a body connector 10, the mouthpiece 2 comprises a mouthpiece connector 8 and a store of liquid 33, and the mouthpiece connector 8 is connectable to the body connector 10 by an interference fit; wherein the mouthpiece 2 has a limited range of rotation about the longitudinal axis of the body 4 when connected to the body 4.

Description

Electronic Vapour Provision Device

Field The specification relates to an electronic vapour provision devices. More particularly, but not exclusively, the specification concerns electronic vapour provision devices in the form of an electronic cigarette.

Background

So-called smokeless cigarettes are typically cigarette-sized and function by allowing a user to inhale a nicotine vapour from a liquid store by applying a suction force to a mouthpiece. Some smokeless cigarettes have a separate cylindrical mouthpiece which can be pushed onto a body in any orientation and rotated freely relative to the body. Smokeless cigarettes include electronic cigarettes.

Summary

In an embodiment there is provided an electronic vapour provision device comprising a generally cylindrical body and a mouthpiece, where the body comprises a body connector, the mouthpiece comprises a mouthpiece connector and a store of liquid, and the mouthpiece connector is connectable to the body connector by an interference fit; wherein the mouthpiece has a limited range of rotation about the longitudinal axis of the body when connected to the body.

By limiting the range of rotation, the mouthpiece cannot be rotated freely relative to the body when connected to the body. When a mouthpiece is freely rotatable, a user who rotates the mouthpiece against the friction of the interference fit can cause damage to the connection means and break the device. Therefore, preventing this free rotation reduces the chances of potential damage.

The mouthpiece may be substantially not rotatable relative to the body when connected to the body. If the mouthpiece cannot be rotated once connected, this further reduces the chances of damage. The mouthpiece can be releasably-connectable to the body.

Having a mouthpiece that is releasably-connectable enables the mouthpiece to be replaced without replacing the entire device, causing less wastage. Also, a mouthpiece with a limited range of rotation can only be applied in particular configurations.

Where the mouthpiece is positioned in a fixed position relative to the body, the electronic vapour provision device can be advantageously configured. In an electronic vapour provision device having a vaporiser, where the vaporiser part is connected to the mouthpiece and a liquid bottle is contained in the mouthpiece, the vaporiser part becomes in fluid communication with the liquid bottle when the mouthpiece is connected. By fixing the position of the mouthpiece relative to the vaporiser, a preferable orientation can be selected which provides optimum alignment.

Fixing the position of the mouthpiece relative to the body has the advantage of enabling the mouthpiece to be connected to the body by the user in an orientation predefined by the manufacturer. Thus alignment features such as surfaces and printing can be aligned properly.

The body connector can comprise a body protuberance and the mouthpiece connector can comprise a mouthpiece receiving portion configured to receive the body protuberance. Having a body protuberance has the advantage that it requires the mouthpiece to have a receiving portion. Generic mouthpieces without such a receiving portion will therefore not connect correctly to the body. The mouthpieces may also not have an airtight seal. This enables the manufacturer to control which mouthpieces can be used with the device, to control the quality and therefore improve the safety of the device.

The mouthpiece receiving portion may be a mouthpiece wall opening. Alternatively, the mouthpiece receiving portion may be a mouthpiece wall indentation.

Alternatively, the mouthpiece receiving portion may be a mouthpiece wall flexible portion. Alternatively, the mouthpiece receiving portion may be a mouthpiece wall raised portion. The mouthpiece connector can comprise a mouthpiece edge and the body connector can comprise a body edge, configured such that mouthpiece edge abuts the body edge when connected. The body edge may comprise the body protuberance. Furthermore, the mouthpiece edge may comprise the mouthpiece receiving portion.

Alternatively, the mouthpiece connector may comprise a mouthpiece protuberance and the body connector may comprise a body receiving portion configured to receive the protuberance.

A mouthpiece edge may comprise the mouthpiece protuberance and a body edge may comprise the body receiving portion. The body connector and mouthpiece connector may comprise non-circular cross sections.

Having non-circular cross sections has the advantage that it requires a mouthpiece with a non-circular cross section. Generic mouthpieces with a circular cross section will therefore not attach correctly to the body. The mouthpieces will also not have an airtight seal. This enables the manufacturer to control which mouthpieces can be used with the device, to control the quality and therefore improve the safety of the device.

The body can comprise one or more connected modules. Furthermore, the body can comprise a vaporiser module and a battery assembly module; where the battery assembly module comprises a power cell and an airflow sensor and the vaporiser module comprises a vaporiser. Moreover, the vaporizer module may be releasably- attachable to the battery assembly module. The body connector may form part of the vaporiser.

The body may further comprise a securing ring, the securing ring may comprise a securing ring edge and the securing ring edge may comprise the body edge.

This has the advantage that the securing ring is a part added to the device during manufacturing and containing the protuberance. Adding the protuberance to the single securing ring part provides an easy method of manufacturing a device with a body protuberance.

The electronic vapour provision device may comprise an electronic cigarette.

In another embodiment there is provided a smokeless cigarette comprising a cigarette body and a mouthpiece, wherein the cigarette body comprises a cigarette body connection means, the mouthpiece comprises a mouthpiece connection means and the mouthpiece connection means is attachable to the cigarette body connection means by an interference fit; wherein the mouthpiece has a limited range of rotation about the longitudinal axis of the cigarette relative to the cigarette body when connected to the cigarette body.

As used herein, the term vapour includes an aerosol and other fluid streams for provision to a user by the electronic vapour provision device.

Brief Description of the Drawings

For a better understanding of the disclosure, and to show how example embodiments may be carried into effect, reference will now be made to the accompanying drawings in which:

Figure ι is an exploded side perspective view of an electronic vapour provision device having separated mouthpiece and body, with a raised body protuberance;

Figure 2 is a side perspective view of the device of Figure ι with connected mouthpiece and body;

Figure 3 is a side perspective view of a mouthpiece having an edge indentation;

Figure 4 is a side perspective view of a mouthpiece having a flexible portion;

Figure 5 is a side perspective view of a mouthpiece having a wall opening;

Figure 6 is a side perspective view of a mouthpiece having a raised portion;

Figure 7 is an exploded side perspective view of an electronic vapour provision device having separated mouthpiece and body, with a raised elongated body protuberance; Figure 8 is a side perspective view of the device of Figure 7 with connected mouthpiece and body;

Figure 9 is an exploded side perspective view of an electronic vapour provision device having separated mouthpiece and body, with an edge elongated body protuberance; Figure 10 is a side perspective view of the device of Figure 9 with connected mouthpiece and body;

Figure 11 is an exploded side perspective view of an electronic vapour provision device having separated mouthpiece and body, with a mouthpiece receiving portion larger than a body protuberance;

Figure 12 is a side perspective view of the device of Figure 11 with connected mouthpiece and body in a first position;

Figure 13 is a side perspective view of the device of Figure 11 with connected mouthpiece and body in a second position;

Figure 14 is an exploded side perspective view of battery assembly and vaporiser with a securing ring on the vaporiser having a body edge protuberance;

Figure 15 is a side perspective view of Figure 14 with connected battery assembly and vaporiser;

Figure 16 is a side perspective view of a body with body receiving portion;

Figure 17 is a side perspective view of a mouthpiece with mouthpiece protuberance; Figure 18 is a side perspective view of a body with square cross section connection means;

Figure 19 is a side perspective view of a mouthpiece with inner square cross section and outer circular cross section;

Figure 20 is a side perspective view of a mouthpiece with inner square cross section and outer square cross section;

Figure 21 is a side perspective view of a body with hexagonal cross section connection means;

Figure 22 is a side perspective view of a mouthpiece with inner hexagonal cross section and outer circular cross section;

Figure 23 is a side perspective view of a mouthpiece with inner hexagonal cross section and outer hexagonal cross section; and

Figure 24 is a schematic sectional view of an electronic vapour provision device; Figure 25 is a partially exploded schematic sectional view of the device of Figure 24; Figure 26 is a schematic sectional view of another electronic vapour provision device; and

Figure 27 is a partially exploded schematic sectional view of the device of Figure 26. Detailed Description Referring to Figures l to 3 of the accompanying drawings there is shown an electronic vapour provision device in the form of a smokeless cigarette having a mouthpiece 2 and a body 4. The smokeless cigarette has a shape similar to that of a conventional cigarette and the outer forms of the mouthpiece 2 and body 4 are therefore substantially cylindrical. The mouthpiece 2 has an airflow outlet 6 at one end and a mouthpiece connector 8 at the other. The body 4 has a tip at one end and a body connector 10 at the other. The mouthpiece 2 is shaped like a hollow cylinder, open at one end, the mouthpiece connector end. The closed end has an aperture being the airflow outlet 6. The cylindrical wall of the mouthpiece 2 is herein referred to as the mouthpiece wall. The mouthpiece connector 8 therefore comprises the region at the open end of the cylindrical of the mouthpiece 2. Moreover, the mouthpiece connector 8 is configured to receive the body connector 10 so as to form the connection between the body 4 and the mouthpiece 2. The body 4 is substantially cylindrical. The body connector 10 comprises a region of reduced diameter at a first end of the body 4 and is therefore also substantially cylindrical. Moreover, the body connector 10 is configured to fit within the mouthpiece connector 8, having an outer diameter slightly larger than the inner diameter of the mouthpiece 2. Thus, the mouthpiece 2 can be pushed onto the body 4 and the difference between the inner diameter of the mouthpiece connector 8 and the outer diameter of the body connector 10 causes friction between the two connectors and acts as an interference fit. The friction is such that when pushed together, the two parts remain attached throughout use of the device. The friction is also such that the parts can be separated by pulling apart when required.

The outer diameter of the mouthpiece 2 is equal to the outer diameter of the body 4 such that the outer surfaces of the two parts are substantially flush with one another when the parts are connected. A body edge 12 is defined connecting the surface of the body connector 10 to the outer surface of the body 4. In other words, the reduction in the outer diameter of the body 4 at the body connector 10 comprises a step change in the outer diameter, which comprises the body edge 12. The mouthpiece 2 has a mouthpiece edge 14 being the edge of the cylinder at the open end. When the mouthpiece 2 is connected to the body 4, the mouthpiece edge 14 abuts the body edge 12, as shown in Figure 2. The body connector 10 comprises a body protuberance 16 and the mouthpiece connector 8 comprises a mouthpiece receiving portion 18, wherein the mouthpiece receiving portion 18 is configured to receive the body protuberance 16 during connection of the body 4 and the mouthpiece 2.

The body protuberance 16 comprises a raised hemispherical bump on the surface of the region of reduced outer body diameter of the body connector. The mouthpiece 2 has a mouthpiece receiving portion 18 comprising a U-shaped indent, recess or cutout in the mouthpiece wall leading back from the mouthpiece edge 14. The

mouthpiece receiving portion 18 therefore comprises an indent in the mouthpiece 2 in a direction parallel to the longitudinal axis of the mouthpiece 2. The width, or circumferential extent, of the recess of the mouthpiece receiving portion 18 is substantially equal to the width, or circumferential extent, of the hemispherical bump of the body protuberance 16. The mouthpiece 2 can therefore only be fitted to the body 4 when the mouthpiece receiving portion 18 is aligned with the body protuberance 16. So, whilst the body connector 10 and the mouthpiece connector 8 are substantially cylindrical and the frictional force between the parts is such that the parts can be moved relative to one another, the mouthpiece 2 is prevented from being rotated relative to the body 4 due to the interaction of the body protuberance 16 and the mouthpiece receiving portion 18.

Figures 4 to 6 show alternative example mouthpieces to the mouthpiece shown in Figures 1 to 3, wherein the mouthpiece receiving portion 18 is altered. Figure 4 shows a mouthpiece 2, wherein the mouthpiece receiving portion 18 is a flexible portion of the cylindrical wall of the mouthpiece 2. The mouthpiece connector 8 comprises a pair of splits in the wall of the mouthpiece 2 leading from the mouthpiece edge 14, defining a flexible portion of the mouthpiece wall between the splits. The mouthpiece 2 is configured to be connected to the body 4 by aligning the flexible portion with the body protuberance 16 and pushing the mouthpiece 2 onto the body 4 so that the flexible portion flexes on top of the body protuberance 16, therein receiving the body protuberance 16. The flexible portion of the mouthpiece receiving portioni8 is therefore flexible in a direction perpendicular to the longitudinal axis of the mouthpiece 2. In Figure 5, the mouthpiece receiving portion 18 comprises a wall opening, being a circular hole in the cylindrical wall of the mouthpiece, near to the mouthpiece edge 14. The wall opening is configured to at least partially receive the body protuberance 16. The mouthpiece 2 is therefore configured to be connected to the body 4 by aligning the hole with the body protuberance 16 and pushing the mouthpiece 2 onto the body 4 until the raised protuberance 16 is located within the hole.

In Figure 6, the mouthpiece receiving portion 18 comprises a raised wall portion, wherein a region of the mouthpiece wall and mouthpiece edge 14 has a radius larger than the radius of the remaining mouthpiece wall and edge to create the raised wall portion. In other words, the mouthpiece receiving portion 18 comprises a region of the mouthpiece wall extending back from the mouthpiece edge 14 comprising an outward radial deviation of the mouthpiece wall, forming a channel in the inner surface of the mouthpiece 2. Alternatively, the mouthpiece receiving portion 18 may be described as a mouthpiece wall raised portion which is raised in a direction perpendicular to the longitudinal axis of the mouthpiece 2. The channel is

approximately parallel with the cylindrical axis of the mouthpiece 2 and is configured to receive the body protuberance 16. The raised wall portion runs part way down the length of the mouthpiece 2 and is a raised bump on the surface. The mouthpiece 2 is configured to be connected to the body 4 by aligning the raised wall portion, or channel, with the body protuberance 16 and pushing the mouthpiece 2 onto the body 4 until the raised portion covers the body protuberance 16.

Figures 7 and 8 show another example of an electronic vapour provision device in the form of a smokeless cigarette, similar to that of Figures 1 to 3. The difference is that the body protuberance 16 is elongated in a direction parallel to the lengthwise direction of the cigarette. The mouthpiece 2 is configured to be connected to the body 4 by aligning the mouthpiece receiving portion 18 with the body protuberance 16. Figures 9 and 10 show another example of an electronic vapour provision device in the form of a smokeless cigarette, similar to that shown in Figures 1 to 3. The difference is that the body protuberance 16 extends longitudinally along the region of reduced body diameter of the body from the body edge 12 and is a flat U-shaped raised portion configured to be received by the profile of the U-shaped indent of the mouthpiece receiving portion 18 in the mouthpiece wall. In this sense, the profile of the body protuberance 16 can alternatively be described as finger-shaped. The mouthpiece 2 is connected to the body 4 by aligning the body U-shaped raised portion with the U- shaped indent. The edge profile of the U-shaped raised portion matches the edge profile of the U-shaped indent such that the outer surfaces of the mouthpiece 2 and the body 4 are flush, level and at least substantially without gaps when connected. Another way of describing this is that the body edge 12 comprises the body

protuberance 16 and the mouthpiece edge 14 comprises the mouthpiece receiving portion 18.

Figures 11 to 13 show another example of an electronic vapour provision device in the form of a smokeless cigarette, similar to that shown in Figures 9 and 10. However, the width of the U-shaped mouthpiece indent is wider than the width of the U-shaped raised portion of the body 4. Therefore the mouthpiece 2 can be attached to the body 4 such that the mouthpiece 2 can be rotated slightly, the U-shaped portion being moveable between the extremes of the U-shaped indent. Figure 12 shows the mouthpiece 2 connected to the body 4 in a first position with a first side of the U- shaped portion in contact with a first inner side of the U-shaped indent. In Figure 13, a second side of the U-shaped portion is in contact with a second inner side of the U- shaped indent. Figures 14 and 15 show another example of an electronic vapour provision device in the form of a smokeless cigarette. Only the body 4 is shown, however the mouthpiece 2 may for example be substantially as described with reference to the smokeless cigarette of Figures 9 and 10. Moreover, the mouthpiece 2 comprises a store of liquid. This smokeless cigarette is an electronic cigarette and the body 4 comprises a vaporiser module 20 and a battery assembly module 22. The vaporiser module 20 can be connected to and disconnected from the battery assembly module 22. Both the vaporiser module 20 and the battery assembly module 22 are cylindrical in shape, and of the same cylindrical diameter. Moreover, the vaporiser module 20 is configured to connect to the battery assembly module 22 such that the cylindrical forms of both modules are substantially coaxial and flush with each other. The vaporiser module 20 comprises a heater coil 24, a mesh wick 26 and a securing ring 28. The securing ring 28 comprises a hollow cylindrical ring configured to fit tightly around the other components of the vaporiser module 20 so as to secure them together. In this way, the securing ring 28 provides the cylindrical outer surface of the vaporiser module 20. The battery assembly module 22 comprises a power cell and an airflow sensor. When connected, the vaporiser module 20 is situated at the end of the body 4 where the body connector 10 is located and therefore the body connector 10 forms part of the vaporiser module 20. Moreover, the vaporiser module 20 is configured such that, upon connection of the mouthpiece 2 to the body 4, a fluid communication is established between the mesh wick 26 of the vaporiser module 20 and the store of liquid of the mouthpiece 2. The body connector 10 is similar to that shown in Figures 9 and 10 where a body protuberance 16 extends from a body edge 12. In this example, the body edge 12 is an edge of the securing ring 28. The securing ring 28 therefore comprises a hollow ring with a protrusion 16 from an edge of the ring in a direction parallel with the cylindrical axis of the ring 28, and configured to be received by the mouthpiece receiving portion 16. The body protuberance 16 is configured to slot into the mouthpiece receiving portion 16 when connected, in a similar fashion to the example device described in relation to Figures 9 and 10.

Figures 16 and 17 show another example of an electronic vapour provision device in the form of a smokeless cigarette. In this example, the mouthpiece connector 8 comprises a mouthpiece protuberance 30, being a raised surface on the inside of the wall of the mouthpiece 2 and running from the mouthpiece edge 14 lengthwise. The mouthpiece protuberance 30 is therefore elongated in a direction parallel to the longitudinal axis of the mouthpiece 2. The body connector 10 comprises a body receiving portion 32, being an indent in the surface of the region of reduced body diameter of the body connector 10. The mouthpiece 2 is configured to be connected to the body 4 by aligning the mouthpiece protuberance 30 with the body receiving portion 32 and pushing the parts together so that the raised surface on the inside wall of the mouthpiece 2 slots into the indent on the surface of the body connector 10.

Alternatively, a mouthpiece edge 14 may comprise the mouthpiece protuberance 30 and a body edge 12 may comprise a corresponding body receiving portion 32. For example, the mouthpiece protuberance 30 may comprise a deviation of the mouthpiece edge 14 in a direction parallel to the cylindrical axis of the mouthpiece 2, forming an extension of the wall of the mouthpiece 2 towards the body 4.

Previous examples have shown the mouthpiece connector 8 and the body connector 10 comprising substantially circular cross sections. However, the body connector 10 and mouthpiece connector 8 may comprise non-circular cross sections. These cross sections may comprise regular shapes. For example, the cross sections may comprise regular polygons or can be square. Moreover, the cross sections may have a discrete rotational symmetry. Alternatively, the cross sections maybe irregular shapes and/or may have no rotational symmetry.

Figures 18 to 23 show examples of electronic vapour provision devices in the form of a smokeless cigarettes with non-circular connector cross sections.

Figures 18 to 20 show an example of an electronic vapour provision device in the form of a smokeless cigarette where instead of the body connector 10 comprising a cylindrical area of reduced outer body diameter configured to fit within the mouthpiece connector 8, the cross sectional shape of the body connector 10 in this area is square and the cross sectional shape of the inner wall of the mouthpiece connector 8 is square. As with the other examples, the mouthpiece 2 forms an interference fit with the body 4 where the parts are held together by frictional force when connected. In this example, the mouthpiece 2 has a rotational symmetry of four and can be connected to the body 4 in four different orientations. In Figure 19 the cross sectional shape of the outer surface of the mouthpiece 2 is circular. In Figure 20 the cross sectional shape of the outer surface of the mouthpiece 2 is square.

Figures 21 to 23 show an example of an electronic vapour provision device in the form of a smokeless cigarette where the cross sectional shape of the body connector 10 is hexagonal and the cross sectional shape of the inner wall of the mouthpiece connector 8 is hexagonal. As with the other examples, the mouthpiece 2 forms an interference fit with the body 4 where the parts are held together by frictional force when connected. In this example, the mouthpiece 2 has a rotational symmetry of six and can be connected to the body 4 in six different orientations. In Figure 22 the cross sectional shape of the outer surface of the mouthpiece 2 is circular. In Figure 23 the cross sectional shape of the outer surface of the mouthpiece 2 is hexagonal.

As illustrated by Figures 14 and 15, any of the electronic vapour provision devices described herein may be electronic cigarettes, wherein for example the liquid to be vaporised is stored in the mouthpiece. Examples of such electronic vapour provision devices in the form of electronic cigarettes are described below with reference to Figures 24 to 27. Figure 24 shows a schematic sectional view of an electronic cigarette similar to the smokeless cigarette shown in Figures 9 and 10, wherein the body protuberance 16 and mouthpiece receiving portion 18 are as is described with reference to the cigarette of Figures 9 and 10.

Figure 25 shows a partially exploded schematic sectional view of the electronic cigarette of Figure 24.

With reference to the electronic cigarette of Figures 24 and 25, the mouthpiece 2 further comprises a store of liquid 33 to be vaporised. For example this may comprise foam partially saturated with liquid. Moreover, the body 4 further comprises a vaporiser arrangement 34, a battery 35, a controller 36 and an airflow sensor 37.

For example, the vaporiser arrangement 34 may comprise a heater coil and a mesh wick. The vaporiser arrangement 34 is located at least partly within the body connector 10 and is configured such that when the mouthpiece 2 is connected to the body 4, the vaporiser arrangement 34 becomes in fluid communication with the store of liquid 33 of the mouthpiece 2. For example, a mesh wick of the vaporiser arrangement 34 may become in fluid communication with the store of liquid 33.

The airflow sensor 37 is configured to sense airflow resulting from use of the electronic cigarette by a user.

The battery 35 supplies the vaporiser arrangement 34 and the airflow sensor 37 with power.

The controller 36 controls the battery 35, the airflow sensor 37 and the vaporiser arrangement 34. For example, the controller 36 may be configured to receive information from the airflow sensor 37 indicating that a user is operating the electronic cigarette and, in response to this, to provide power from the battery 35 to the vaporiser arrangement 34.

Figure 26 shows a schematic sectional view of another electronic cigarette similar to the smokeless cigarette shown in Figures 14 and 15, wherein the body connector 10 and mouthpiece connector 8 are as is described with reference to the cigarette of Figures 14 and 15. Figure 27 shows a partially exploded schematic sectional view of the electronic cigarette of Figure 26. With reference to the electronic cigarette of Figures 26 and 27, the mouthpiece 2 further comprises a store of liquid 33 to vaporised.

The battery assembly module 22 comprises a battery 35, a controller 36 and an airflow sensor 37.

The battery 35 supplies the vaporiser module 20, the controller 36 and the airflow sensor 37 with power. The controller 36 controls the battery 35, the airflow sensor 37 and the vaporiser arrangement 34 of the vaporiser module 20. For example, the controller 36 may be configured to receive information from the airflow sensor indicating that a user is operating the electronic cigarette and, in response to this, provide power from the battery 35 to the vaporiser arrangement 34.

With regard to the electronic vapour provision devices described herein, in order to use the device, the user must suck on the mouthpiece 2.

With regard to the electronic vapour provision devices of Figures 14, 15 and 24 to 27, the electronic vapour provision device is configured such that the user sucking on the mouthpiece 2 causes a flow of air at the airflow sensor. The controller 36 therefore receives information from the airflow sensor indicating that a user is sucking on the device. In response to this information, the controller 36 controls the power cell 10 to power the vaporiser 20, 34. This causes the vaporisation of liquid communicated to the vaporiser 20, 34 from the liquid bottle 33. The provided vapour then passes to the user. Consequently, use of the device by a user comprises the user sucking on the device and the detection of this user interaction by the device so as to trigger the vaporisation of the liquid contained in the device. With regard to the embodiments described herein, the following alternatives and variations will now be described. The interference fit between the mouthpiece connector 8 and the body connector 4 may for example be a press-fit. The electronic cigarettes may be substantially cigarette shaped.

The mouthpiece connector may be releasably-connectable to the body connector. Moreover, the mouthpiece may form an airtight seal with the body when connected to the body.

The mouthpiece can be configured such that it can be pushed onto the body and twisted to lock it in place. For example, the mouthpiece may comprises an L-shaped mouthpiece receiving portion. In other words, the mouthpiece receiving portion 18 may comprise a cut-out in the wall of the mouthpiece extending back from the mouthpiece edge and resembling an 'L' in its profile.

The body connector and the mouthpiece connector can comprise modified cylinders.

The U-shaped indent and portion described at least with reference to Figures 9 to 15 could easily take another form such as a rectangle.

Whilst both square and hexagonal connector cross sections have been described, other regular shapes and irregular shapes could be used. As is described with reference to Figures 24 and 25, the electronic cigarettes may comprise a combined vaporiser and battery assembly. Alternatively, the body could form the battery assembly and the vaporiser could form part of the mouthpiece.

Although examples have been shown and described it will be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention.

In order to address various issues and advance the art, the entirety of this disclosure shows by way of illustration various embodiments in which the claimed invention(s) may be practiced and provide for superior smokeless cigarettes. The advantages and features of the disclosure are of a representative sample of embodiments only, and are not exhaustive and/or exclusive. They are presented only to assist in understanding and teach the claimed features. It is to be understood that advantages, embodiments, examples, functions, features, structures, and/or other aspects of the disclosure are not to be considered limitations on the disclosure as defined by the claims or limitations on equivalents to the claims, and that other embodiments may be utilised and modifications may be made without departing from the scope and/or spirit of the disclosure. Various embodiments may suitably comprise, consist of, or consist essentially of, various combinations of the disclosed elements, components, features, parts, steps, means, etc. In addition, the disclosure includes other inventions not presently claimed, but which may be claimed in future. Any feature of any

embodiment can be used independently of, or in combination with, any other feature.

Claims

Claims l. An electronic vapour provision device comprising a generally cylindrical body and a mouthpiece, where the body comprises a body connector, the mouthpiece comprises a mouthpiece connector and a store of liquid, and the mouthpiece connector is connectable to the body connector by an interference fit; wherein the mouthpiece has a limited range of rotation about the longitudinal axis of the body when connected to the body.

2. The electronic device of claim l, wherein the mouthpiece is substantially not rotatable relative to the body when connected to the body.

3. The electronic device of claim 1 or 2, wherein the mouthpiece is releasably- connectable to the body.

4. The electronic device of claim 1, 2 or 3, wherein the body connector comprises a body protuberance and the mouthpiece connector comprises a mouthpiece receiving portion configured to receive the body protuberance.

5. The electronic device of claim 4, wherein the mouthpiece comprises a mouthpiece wall and the receiving portion comprises an opening in the mouthpiece wall, an indent in the mouthpiece wall, a flexible portion of the mouthpiece wall or a raised portion of the mouthpiece wall.

6. The electronic device of claim 4 or 5, wherein the mouthpiece connector comprises a mouthpiece edge and the body connector comprises a body edge, configured such that mouthpiece edge abuts the body edge when connected.

7. The electronic device of claim 6, wherein the body edge comprises the body protuberance and the mouthpiece edge comprises the mouthpiece receiving portion.

8. The electronic device of claim 1, 2 or 3, wherein the mouthpiece connector comprises a mouthpiece protuberance and the body connector comprises a body receiving portion configured to receive the protuberance.

9. The electronic device of claim 8, wherein a mouthpiece edge comprises the mouthpiece protuberance and a body edge comprises the body receiving portion.

10. The smokeless device of any preceding claim, wherein the body connector and mouthpiece connector comprise non-circular cross sections.

11. The electronic device of claim 6 or 7, wherein the body comprises one or more connected modules.

12. The electronic device of claim 11, wherein the body comprises a vaporiser module and a battery assembly module; where the battery assembly module comprises a power cell and an airflow sensor and the vaporiser module comprises a vaporiser.

13. The electronic device of claim 12, wherein the vaporiser module is releasably- connectable to the battery assembly module.

14. The electronic device of claim 12 or 13, wherein the body connector forms part of the vaporiser.

15. The electronic device of claim 12, 13 or 14, wherein the vaporiser further comprises a securing ring, the securing ring comprises a securing ring edge and the securing ring edge comprises the body edge.

16. The electronic vapour provision device of any preceding claim comprising an electronic cigarette.

17. A smokeless cigarette comprising a cigarette body and a mouthpiece, where the cigarette body comprises a cigarette body connection means, the mouthpiece comprises a mouthpiece connection means and the mouthpiece connection means is attachable to the cigarette body connection means by an interference fit; wherein the mouthpiece has a limited range of rotation about the longitudinal axis of the cigarette relative to the cigarette body when connected to the cigarette body.