Aerosol provision system

Abstract

An aerosol provision system comprising a reservoir for aerosolizable material, a wick for receiving aerosolizable material from the reservoir, and a vaporizer for vaporizing aerosolizable material in the wick. A structure from the aerosol provision system, in response to a temperature of the vaporizer or wick exceeding a predetermined temperature, is operable to change from a first configuration in which operation of the vaporizer is possible, to a second configuration in which operation of the vaporizer is prevented. This structure could be operable to reversibly change between the first configuration and the second configuration, and might be configured to short circuit the vaporizer in some cases. The structure might also be configured to disconnect a connection lead for delivering power to the in some cases.

1 . An aerosol provision system comprising a reservoir for aerosolizable material, a wick for receiving aerosolizable material from the reservoir, and a vaporizer for vaporizing aerosolizable material in the wick;
 wherein a structure from the aerosol provision system, in response to a temperature of the vaporizer or wick exceeding a predetermined temperature, is operable to change from a first configuration in which operation of the vaporizer is possible, to a second configuration in which operation of the vaporizer is prevented;   wherein the structure is located on an external surface of the wick, wherein the structure is operably to reversibly change between the first configuration and the second configuration, and wherein the structure comprises a shape memory element, wherein the shape memory element is configured to move from a first position in the first configuration to a second position in the second configuration.   
     
     
         2 . The aerosol provision system of  claim 1 , wherein the structure is operable to change from the first configuration to the second configuration in response to the temperature of the vaporizer exceeding the predetermined temperature. 
     
     
         3 . The aerosol provision system of  claim 1 , wherein the structure is operable to change from the first configuration to the second configuration in response to the temperature of the wick exceeding the predetermined temperature. 
     
     
         4 . (canceled) 
     
     
         5 . The aerosol provision system of  claim 1 , wherein in response to the temperature of the vaporizer or wick exceeding the predetermined temperature, heat from the vaporizer is configured to change the structure from the first configuration to the second configuration. 
     
     
         6 - 12 . (canceled) 
     
     
         13 . The aerosol provision system of  claim 1 , wherein in the second configuration, the structure is configured to short circuit the vaporizer and/or disconnect a connection lead for delivering power to the vaporizer. 
     
     
         14 - 16 . (canceled) 
     
     
         17 . The aerosol provision system of  claim 1 , wherein at least a portion of the structure is located within 5 mm of the vaporizer. 
     
     
         18 - 19 . (canceled) 
     
     
         20 . The aerosol provision system of  claim 1 , wherein the aerosol provision system further comprises an air inlet and an outlet, and an air channel extending from the air inlet to the outlet, wherein the vaporizer is located in the air channel between the air inlet and outlet. 
     
     
         21 - 28 . (canceled) 
     
     
         29 . The aerosol provision system of  claim 1 , further comprising a cartridge and a control unit,
 wherein the reservoir, the vaporizer, and the structure are located in the cartridge,   wherein the control unit comprises a cartridge receiving section that includes an interface arranged to cooperatively engage with the cartridge so as to releasably couple the cartridge to the control unit, wherein the control unit further comprises a power supply and control circuitry.   
     
     
         30 - 35 . (canceled) 
     
     
         36 . A cartridge for an aerosol provision system comprising the cartridge and a control unit, wherein the cartridge comprises:
 a reservoir for aerosolizable material;   a wick for receiving aerosolizable material from the reservoir; and   a vaporizer for vaporizing aerosolizable material in the wick; and   a structure which, in response to a temperature of the wick or the vaporizer exceeding a predetermined temperature, is operable to change from a first configuration in which operation of the vaporizer is possible, to a second configuration in which operation of the vaporizer is prevented;   wherein the structure is located on an external surface of the wick, wherein the structure is operable to reversibly change between the first configuration and the second configuration, and wherein the structure comprises a shape memory element, wherein the shape memory element is configured to move form a first position in the first configuration to a second position in the second configuration.   
     
     
         37 - 124 . (canceled)