# US 11,998,687 B2 · Micropump for an aerosol delivery device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,687 B2 - Document ID: US11998687B2 - Status: Granted - Kind: B2 - Application number: 18/077,571 - Filed: 2022-12-08 - Published: 2023-03-30 - Granted: 2024-06-04 - Earliest claimed: 2018-11-28 - Assignees: RAI Strategic Holdings, Inc. - Applicants: Rai Strategic Holdings, Inc. - Inventors: Rajesh Sur - Web page: https://patentgrep.com/patent/US11998687B2 ## CPC - A61M 15/06: Inhaling appliances shaped like cigars, cigarettes or pipes - A24F 40/10: Devices using liquid inhalable precursors - A24F 40/48: Fluid transfer means, e.g. pumps - A24F 40/50: Control or monitoring - A61M 11/042: {electrical} - A61M 2205/13: with means for the detection of operative contact with patient, e.g. lip sensor - A61M 2205/3331: Pressure; Flow - A61M 2205/3653: by Joule effect, i.e. electric resistance - A61M 2205/8206: battery-operated - 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)} - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) ## Abstract An aerosol delivery device includes a housing enclosing a reservoir retaining an aerosol precursor composition. A first power-source terminal connects a power source to the aerosol delivery device. A heating element is configured to vaporize components of the aerosol precursor composition. A switch is coupled between the first power-source terminal and the heating element. A micro pump is arranged between the reservoir and the heating element to deliver aerosol precursor composition from the reservoir to the heating element. A driver circuit is coupled between the first power-source terminal and the micro pump, to drive the micro pump. A control component includes processing circuitry configured to switchably control the driver circuit to drive the micro pump, and switchably control the switch to connect the power source to the heating element and thereby power the heating element to vaporize components of the aerosol precursor composition. ## Claims ### Claim 1 An aerosol delivery device, comprising: a housing enclosing a reservoir configured to retain an aerosol precursor composition; a first power-source terminal configured to connect a power source to the aerosol delivery device; a heating element configured to convert electricity to heat and thereby vaporize components of the aerosol precursor composition; a switch coupled to and between the first power-source terminal and the heating element; a micro pump arranged to be operable between the reservoir and the heating element to deliver aerosol precursor composition from the reservoir to the heating element; a driver circuit including a boost converter coupled to and between the first power-source terminal and the micro pump, the driver circuit being configured to drive the micro pump via the boost converter; and a control component including processing circuitry configured to switchably control the driver circuit to drive the micro pump to deliver the aerosol precursor composition to the heating element, the processing circuitry also being configured to switchably control the switch to connect the power source to the heating element independently of the driver circuit and thereby power the heating element independently of the boost converter to vaporize components of the aerosol precursor composition. ### Claim 2 (depends on 1) The aerosol delivery device of claim 1, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump. ### Claim 3 (depends on 2) The aerosol delivery device of claim 2, wherein the processing circuitry is configured to switchably control the switch to connect the power source to the heating element independent of the boost converter. ### Claim 4 (depends on 1) The aerosol delivery device of claim 1, comprising: a sensor configured to produce a measurement of pressure caused by airflow through at least a portion of the housing, and convert the measurement of pressure to a corresponding electrical signal, wherein the processing circuitry being configured to switchably control the switch to connect the power source to the heating element includes being configured to receive the corresponding electrical signal and in response control the switch to connect the power source to the heating element. ### Claim 5 (depends on 1) The aerosol delivery device of claim 1, wherein the switch is a high-side load switch, and the processing circuitry being configured to switchably control the switch to connect the power source to the heating element includes being configured to switchably control the high-side load switch to connect the power source to the heating element. ### Claim 6 (depends on 1) The aerosol delivery device of claim 1, wherein the micro pump is a mechanical micro pump, and the mechanical micro pump is a diaphragm micro pump or a peristaltic micro pump. ### Claim 7 (depends on 1) The aerosol delivery device of claim 1, wherein the micro pump is a non-mechanical micro pump, and the non-mechanical micro pump is a valveless micro pump, a capillary micro pump or a chemically-powered pump. ### Claim 8 (depends on 1) The aerosol delivery device of claim 1, comprising a liquid transport element between and fluidly connecting the micro pump and the heating element. ### Claim 9 (depends on 1) The aerosol delivery device of claim 1, wherein the processing circuitry is configured to switchably drive the micro pump to deliver the aerosol precursor composition once for a predetermined period per n>1 cycles of the power source being switchably connected to the heating element via the switch. ### Claim 10 (depends on 1) The aerosol delivery device of claim 1, wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the driver circuit to drive the micro pump at an adjustable frequency that is directly related to a volume flow rate of aerosol precursor composition through the micro pump. ### Claim 11 (depends on 1) The aerosol delivery device of claim 1, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump, and wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the boost converter to step up the voltage from the power source to an adjustable higher voltage that is directly related to a volume flow rate of aerosol precursor composition through the micro pump. ### Claim 12 (depends on 1) The aerosol delivery device of claim 1, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump, wherein the control component is further configured to receive an indication of a user-selected amount of aerosol precursor composition, and wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the driver circuit to drive the micro pump at an adjustable frequency, or switchably control the boost converter to step up the voltage from the power source to an adjustable higher voltage, that causes the micro pump to deliver the selectable amount of aerosol precursor composition to the heating element. ### Claim 13 (depends on 12) The aerosol delivery device of claim 12, wherein the control component further includes a communication interface coupled to the processing circuitry and configured to enable the aerosol delivery device to establish wireless communication with a computing device configured to provide the indication of the user-selected amount of aerosol precursor composition. ### Claim 14 (depends on 1) The aerosol delivery device of claim 1, wherein the aerosol precursor composition comprises glycerin and nicotine. ### Claim 15 (depends on 1) The aerosol delivery device of claim 1, wherein the first power-source terminal and a second power-source terminal, the micro pump, the driver circuit and the control component are contained within the housing. ### Claim 16 (depends on 1) The aerosol delivery device of claim 1, wherein the housing is of a cartridge, the aerosol delivery device further comprises a control body with a second housing, and the first power-source terminal and a second power-source terminal, the micro pump, the driver circuit and the control component are contained within the second housing. ### Claim 17 A control body for an aerosol delivery device, the control body comprising: a housing enclosing a reservoir configured to retain an aerosol precursor composition; a first power-source terminal configured to connect a power source to the control body; heating-element terminals configured to connect a heating element to the control body, the heating element being configured to convert electricity to heat and thereby vaporize components of the aerosol precursor composition; a switch coupled to and between the first power-source terminal and the heating element; a micro-pump terminal configured to connect a micro pump to the control body, the micro pump being arranged to be operable between the reservoir and the heating element to deliver aerosol precursor composition from the reservoir to the heating element; a driver circuit including a boost converter coupled to and between the first terminal and the micro pump, the driver circuit being configured to drive the micro pump via the boost converter; and a control component including processing circuitry configured to switchably control the driver circuit to drive the micro pump to deliver the aerosol precursor composition to the heating element, the processing circuitry also being configured to switchably control the switch to connect the power source to the heating element independently of the driver circuit and thereby power the heating element independently of the boost converter to vaporize components of the aerosol precursor composition. ### Claim 18 (depends on 17) The control body of claim 17, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump. ### Claim 19 (depends on 17) The control body of claim 17, wherein the processing circuitry is configured to switchably control the switch to connect the power source to the heating element independent of the boost converter. ### Claim 20 (depends on 17) The control body of claim 17, comprising: a sensor configured to produce a measurement of pressure caused by airflow through at least a portion of the housing, and convert the measurement of pressure to a corresponding electrical signal, wherein the processing circuitry being configured to switchably control the switch to connect the power source to the heating element includes being configured to receive the corresponding electrical signal and in response control the switch to connect the power source to the heating element. ### Claim 21 (depends on 17) The control body of claim 17, wherein the switch is a high-side load switch, and the processing circuitry being configured to switchably control the switch to connect the power source to the heating element includes being configured to switchably control the high-side load switch to connect the power source to the heating element. ### Claim 22 (depends on 17) The control body of claim 17, wherein the micro pump is a mechanical micro pump, and the mechanical micro pump is a diaphragm micro pump or a peristaltic micro pump. ### Claim 23 (depends on 17) The control body of claim 17, wherein the micro pump is a non-mechanical micro pump, and the non-mechanical micro pump is a valveless micro pump, a capillary micro pump or a chemically-powered pump. ### Claim 24 (depends on 17) The control body of claim 17, wherein the processing circuitry is configured to switchably drive the micro pump to deliver the aerosol precursor composition once for a predetermined period per n>1 cycles of the power source being switchably connected to the heating element via the switch. ### Claim 25 (depends on 17) The control body of claim 17, wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the driver circuit to drive the micro pump at an adjustable frequency that is directly related to a volume flow rate of aerosol precursor composition through the micro pump. ### Claim 26 (depends on 17) The control body of claim 17, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump, and wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the boost converter to step up the voltage from the power source to an adjustable higher voltage that is directly related to a volume flow rate of aerosol precursor composition through the micro pump. ### Claim 27 (depends on 17) The control body of claim 17, wherein the boost converter is configured to step up voltage from the power source to the micro pump to thereby power the micro pump, wherein the control component is further configured to receive an indication of a user-selected amount of aerosol precursor composition, and wherein the processing circuitry being configured to switchably control the driver circuit includes being configured to switchably control the driver circuit to drive the micro pump at an adjustable frequency, or switchably control the boost converter to step up the voltage from the power source to an adjustable higher voltage, that causes the micro pump to deliver the selectable amount of aerosol precursor composition to the heating element. ### Claim 28 (depends on 27) The control body of claim 27, wherein the control component further includes a communication interface coupled to the processing circuitry and configured to enable the control body to establish wireless communication with a computing device configured to provide the indication of the user-selected amount of aerosol precursor composition.