Abstract: A device for controlling electrical power supply in response to air pressure measurement includes an airflow path, a chamber having an aperture, a liquid flow restrictor configured to inhibit ingress of liquid into the chamber via the aperture, a pressure sensor located in the chamber and operable to detect, in the presence of the liquid flow restrictor, air pressure changes caused by air flow in the airflow path, and a circuit for converting air pressure changes detected by the pressure sensor to control signals for controlling output of power from a battery.

Abstract: A storage case for an electronic vapor provision device component having a reservoir for source liquid, the case defining an interior storage volume and including a receiving volume configured to receive at least one such component within the case; and at least one sealing means configured to inhibit liquid held in such a component received in the receiving volume from flowing into the interior storage volume.

Abstract: A component of an electronic vapor provision device with a reservoir for storing source liquid, an atomizer for vaporizing source liquid from the reservoir and delivering vapor into an air flow path through the device, and an electrical power supply for providing electrical power to the atomizer comprises an absorbent element to collect source liquid escaped from the reservoir and located so as to be upstream of the atomizer with respect to an air flow direction along the air flow path when the component is assembled into the electronic vapor provision device.

Abstract: An electronic vapor provision system includes a housing, a vaporizer contained within the housing, and a mouthpiece at one end of the system. The mouthpiece provides an air outlet. At least one air inlet hole is provided in a portion of the housing. In response to a user inhalation at the mouthpiece, air flows into the system through the one or more air inlet holes, past the vaporizer, and out through the mouthpiece. The system further includes a collar located around the portion of the housing in which the one or more air inlet holes are provided. The collar is movable with respect to the housing. The system further includes a mechanism for positively engaging the collar and the housing at a plurality of predetermined positions as the collar is moved with respect to the housing.

Abstract: An aerosol delivery device including a mouthpiece end; an aerosol generation chamber in fluid communication with the mouthpiece end via a primary air channel, wherein the aerosol generation chamber comprises an aerosol source for generating an aerosol from a source material for inhalation by a user through the mouthpiece end during use; and a sensor for detecting when a user inhales on the mouthpiece end, wherein the sensor is in fluid communication with the mouthpiece end via a secondary air channel, and wherein the sensor is located further from the mouthpiece end than the aerosol source, and the secondary air channel bypasses the aerosol generation chamber.

Abstract: A sub-assembly for an electronic vapor provision system includes a source of liquid for vaporization; and a vaporizer for vaporizing a portion of the liquid for inhalation by a user, the vaporizer including a wick component; and an electrical heating element embedded in the wick component. The wick component includes a sheet of a porous electrically-insulating material and is arranged to wick liquid from the source of liquid to a surface of the wick component adjacent to the embedded electrical heating element for vaporization.

Abstract: An aerosol-forming member comprising a sheet of material configured to wick and to heat a solution is disclosed. The sheet of material comprises a non-planar inner major surface having a capillary structure configured to emit vapor during use, and an outer major surface that is configured to emit less vapor than the inner major surface during use.

Abstract: An inductive heating assembly for generating an aerosol from an aerosol precursor material in an aerosol provision system, the inductive heating assembly including: a susceptor; and a drive coil arranged to induce current flow in the susceptor to heat the susceptor and vaporize aerosol precursor material in proximity with a surface of the susceptor, and wherein the susceptor includes regions of different susceptibility to induced current flow from the drive coil, such that when in use the surface of the susceptor in the regions of different susceptibility are heated to different temperatures by the current flow induced by the drive coil.

Abstract: An aerosol provision system for generating an aerosol from a source liquid, the aerosol provision system including: a reservoir of source liquid; a planar vaporizer comprising a planar heating element, wherein the vaporizer is configured to draw source liquid from the reservoir to the vicinity of a vaporizing surface of the vaporizer through capillary action; and an induction heater coil operable to induce current flow in the heating element to inductively heat the heating element and so vaporize a portion of the source liquid in the vicinity of the vaporizing surface of the vaporizer. In some example the vaporizer further comprises a porous wadding/wicking material, e.g. an electrically non-conducting fibrous material at least partially surrounding the planar heating element (susceptor) and in contact with source liquid from the reservoir to provide, or at least contribute to, the function of drawing source liquid from the reservoir to the vicinity of the vaporizing surface of the vaporizer.

Abstract: An aerosol delivery device including: control circuitry for controlling an operating mode of the device; a motion sensor arranged to detect motion of the device and to output corresponding motion detection signals to the control circuitry; and an airflow sensor arranged to detect a flow of air in the device and to output corresponding airflow detection signals to the control circuitry; wherein the control circuitry is configured to determine from the motion detection signals when there is a tapping event corresponding to the device being tapped by a user and to determine from the airflow detection signals when there is an airflow event corresponding a flow of air in the device, and wherein the control circuitry is configured to control the device to switch from a first operating mode to a second operating mode in response to the detection of a predefined sequence of events comprising at least one tapping event and at least one airflow event.

Abstract: An electronic vapor provision system includes a control unit and a cartridge configured to engage with and disengage from one another substantially along a longitudinal axis. The cartridge includes a reservoir of liquid to be vaporized, and the control unit includes a battery and a tube portion disposed along said longitudinal axis. The system further includes an induction heating assembly comprising a drive coil and a heater element. The heater element is located in the cartridge for vaporizing the liquid. The cartridge is configured to feed liquid from the reservoir onto the heater element for vaporization. The drive coil is located in the tube portion of the control unit and disposed about the longitudinal axis. The cartridge is located at least partly within the tube portion when engaged with the control unit, such that the heater element is within the drive coil.

Abstract: An aerosol provision system comprises a heating element for generating an aerosol from a source liquid and control circuitry for controlling a supply of electrical power from a power supply to the heating element. The control circuitry is configured to measure an indication of a derivative of an electrical characteristic of the heating element with respect to time. Based on the measured time derivative, the control circuitry is configured to determine whether or not a fault condition has arisen for the electronic aerosol provision system. The overall change in the electrical characteristic for the heating element caused by the localized heating may be small and so difficult to reliably identify, but the rate at which the change occurs can be expected to be relatively high, such that the time derivative of the local characteristic is a more reliable indicator of occurrence of the fault condition.

Abstract: An electronic vapor provision system includes a housing, a vaporizer contained within the housing, and a mouthpiece at one end of the system. The mouthpiece provides an air outlet. At least one air inlet hole is provided in a portion of the housing. In response to a user inhalation at the mouthpiece, air flows into the system through the one or more air inlet holes, past the vaporizer, and out through the mouthpiece. The system further includes a collar located around the portion of the housing in which the one or more air inlet holes are provided. The collar is movable with respect to the housing. The system further includes a mechanism for positively engaging the collar and the housing at a plurality of predetermined positions as the collar is moved with respect to the housing.

Abstract: An aerosol-forming member comprising a sheet of material configured to wick and to heat a solution is disclosed. The sheet of material comprises a non-planar inner major surface having a capillary structure configured to emit vapor during use, and an outer major surface that is configured to emit less vapor than the inner major surface during use.

Abstract: An aerosol forming component for volatilizing a liquid in an aerosol delivery device is disclosed. The aerosol forming component includes a first aerosol-forming member configured to be heated up to a first operating temperature and thereafter to a second higher operating temperature, and a second aerosol-forming member configured to be heated up to at least the first operating temperature as the first aerosol-forming member reaches the second higher operating temperature so that liquid volatilized from the two aerosol-forming members mix with one another.

Abstract: An aerosol-forming member for an aerosol delivery device is disclosed. The aerosol-forming member comprises a sheet of material configured to heat and wick a solution. The sheet of material comprises at least one corrugation.