# US 12,004,568 B2 · Temperature regulation for personal vaporizing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,568 B2 - Document ID: US12004568B2 - Status: Granted - Kind: B2 - Application number: 17/256,751 - Filed: 2019-07-19 - Published: 2021-08-26 - Granted: 2024-06-11 - Earliest claimed: 2018-07-24 - Assignees: JT International SA - Applicants: JT International S.A. - Inventors: Aidan O'Hare; Brian Molyneux - Web page: https://patentgrep.com/patent/US12004568B2 ## CPC - A24F 40/48: Fluid transfer means, e.g. pumps - A61M 11/042: {electrical} - A24F 40/10: Devices using liquid inhalable precursors - A24F 40/42: Cartridges or containers for inhalable precursors - A24F 40/46: Shape or structure of electric heating means - A24F 40/50: Control or monitoring - A24F 40/57: Temperature control - A61M 15/06: Inhaling appliances shaped like cigars, cigarettes or pipes - A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means - A61M 2205/3368: Temperature - A61M 2205/3653: by Joule effect, i.e. electric resistance - A61M 2205/50: with microprocessors or computers - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - A61M 2207/00: Methods of manufacture, assembly or production - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A cartridge for a personal vaporizing device includes a liquid store, a liquid transfer element, a heating element, a first power terminal and a second power terminal connected to the heating element, and a memory configured to store a first reference value indicating the resistance of the heating element at a reference temperature or reference. A method of manufacturing such a cartridge is also provided. A main body of a personal vaporizing device has a cartridge seating configured to receive such a cartridge. ## Claims ### Claim 1 A cartridge for a personal vaporizing device, the cartridge comprising: a liquid store, a liquid transfer element, a heating element, a first power terminal and a second power terminal connected to the heating element, and a memory storing a first reference value indicating resistance of the heating element at a reference temperature or a reference temperature range of the heating element, wherein the memory stores a second reference value indicating resistance of an open loop of an electronic circuit, the open loop extending between the first and second power terminals and including the heating element. ### Claim 2 (depends on 1) The cartridge according to claim 1, wherein the memory further comprises a predetermined temperature coefficient of resistivity related to a material of the heating element. ### Claim 3 (depends on 1) The cartridge according to claim 1, wherein endpoints of the open loop are the first and second power terminals. ### Claim 4 (depends on 1) The cartridge according to claim 1, further comprising one or more data terminals configured to provide the first and/or second reference values to a main body of the personal vaporizing device. ### Claim 5 (depends on 1) The cartridge according to claim 1, wherein the cartridge further comprises a mouthpiece portion. ### Claim 6 (depends on 1) A method of manufacturing the cartridge according to claim 1, wherein the first reference value is obtained by measuring the resistance of the heating element and measuring an ambient temperature. ### Claim 7 (depends on 6) The method according to claim 6, wherein the ambient temperature substantially corresponds to a temperature of the heating element and/or to the reference temperature. ### Claim 8 (depends on 6) The method according to claim 6, wherein the ambient temperature corresponds to a temperature of the heating element, which differs from the reference temperature, and wherein a resistance reference value at the reference temperature is calculated by adjusting the measured resistance of the heating element by using the formula R=Rref[1+α(T−Tref)], where R is a current resistance of the heating element at the ambient temperature, Rref is the reference resistance value of the heating element at the reference temperature Tref, α is a temperature coefficient of resistance of a material of the heating element and T is a current temperature in ° C. of the heating element. ### Claim 9 (depends on 1) A method of manufacturing the cartridge according to claim 1, wherein the first reference value is obtained by measuring the resistance of the heating element and measuring an ambient temperature, wherein the ambient temperature substantially corresponds to a temperature of the heating element and/or to the reference temperature, and wherein obtaining the second reference value includes a step of measuring the resistance of the open loop after assembly of the open loop while a temperature of the heating element substantially corresponds to the reference temperature or lies within the reference temperature range. ### Claim 10 (depends on 1) A method of manufacturing the cartridge according to claim 1, wherein the first reference value is obtained by measuring the resistance of the heating element and measuring an ambient temperature before assembly of the heating element into the cartridge. ### Claim 11 A main body of a personal vaporizing device, the main body having a cartridge seating configured to receive a cartridge comprising: a heating element, a first power terminal and a second power terminal connected to the heating element to thereby form an open loop between the first and second power terminals, which form endpoints of the open loop, and including the heating element connected between the first and second power terminals; wherein the cartridge seating comprises: a first pair of electrical connectors configured to establish an electrical circuit when connected to respective ones of the first and second power terminals of the cartridge whereby power may be supplied to the heating element from the main body via the first pair of electrical connectors and the first and second power terminals, and a second pair of electrical connectors configured to establish a measuring circuit when connected to respective ones of the first and second power terminals for measuring voltage between the first and second power terminals of the cartridge whilst power is supplied to the first and second power terminals via the first pair of electrical connectors. ### Claim 12 (depends on 11) The main body according to claim 11, wherein the main body further comprises a controller configured to determine resistance of the open loop between the first and second power terminals by the voltage measured by the measuring circuit; and to determine an estimate of resistance of the heating element on the basis of the determined resistance of the open loop. ### Claim 13 (depends on 12) The main body according to claim 12, wherein the controller is further configured to obtain a first reference value indicating the resistance of the heating element at a reference temperature or a reference temperature range of the heating element; and to determine an estimate of a temperature of the heating element by comparing the determined resistance of the open loop with the resistance indicated by the first reference value. ### Claim 14 (depends on 13) The main body according to claim 13, wherein the controller is further configured: to determine a difference between the resistance of the heating element and the resistance of the open loop based on the obtained second reference value; and to determine an estimate of a value of the current resistance of the heating element by subtracting the determined difference between the resistance of the heating element and the resistance of the open loop from the determined resistance of the open loop. ### Claim 15 (depends on 14) The main body according to claim 14, wherein the controller obtains the first and/or second reference values from the cartridge. ### Claim 16 (depends on 15) The main body according to claim 15, further comprising data connectors for obtaining the first and/or second reference values from the cartridge. ### Claim 17 (depends on 12) The main body according to claim 12, wherein the controller is configured to determine a current temperature by executing a functional relationship of R=Rref [1+α(T−Tref)], where R is a current resistance of the heating element at an ambient temperature T, Rref is a reference resistance value of the heating element at a reference temperature Tref, α is a temperature coefficient of resistance of a material of the heating element and T is a current temperature in ° C. of the heating element. ### Claim 18 (depends on 17) The main body according to claim 17, wherein the main body is configured to regulate power applied to the heating element in the cartridge depending on the determined current resistance or current temperature of the heating element.