# US 2017/0280774 A1 · Airflow in aerosol generating system with mouthpiece > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0280774 A1 - Document ID: US20170280774A1 - Status: Published application - Kind: A1 - Application number: 15/474,266 - Filed: 2017-03-30 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: Altria Client Services LLC - Inventors: Eric FORCE - Web page: https://patentgrep.com/patent/US20170280774A1 ## CPC - A24F 40/485: Valves; Apertures - A24F 40/42: Cartridges or containers for inhalable precursors - A24F 40/48: Fluid transfer means, e.g. pumps - A24F 40/10: Devices using liquid inhalable precursors - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) ## Abstract An aerosol generating system includes a liquid storage portion, a liquid transfer element, a power supply, and a heating element operably coupled to the power supply and configured to heat the aerosol generating substrate. The system also includes a cover over the liquid storage portion. ## Claims ### Claim 1 An aerosol generating system having a mouth end and a distal end, the system comprising: a liquid storage portion configured to contain an aerosol generating substrate; a heating element configured to heat the aerosol generating substrate; a cover over at least the liquid storage portion; and one or more air flow channels between the cover and the liquid storage portion, the system defining an aerosol flow path that extends at least from the heating element to the mouth end of the system, and defining an air flow path through the one or more air flow channels extending from at least the liquid storage portion to the mouth end of the system. ### Claim 2 (depends on 1) The system according to claim 1, wherein the air flow path passes over an exterior surface of the liquid storage portion. ### Claim 3 (depends on 1) The system according to claim 1, wherein the liquid storage portion comprises, a housing defining a passage through the length of the housing, and wherein the aerosol flow path extends through the passage of the housing. ### Claim 4 (depends on 1) The system according to claim 1, wherein the cover comprises, a mouthpiece defining the mouth end of the system, the mouthpiece defining a mouth end opening that forms a part of the air flow path and a part of the aerosol flow path. ### Claim 5 (depends on 1) The system according to claim 1, wherein the resistance-to-draw of the system is in a range of from about 50 millimeters water gauge (mmWG) to about 150 mmWG. ### Claim 6 (depends on 5) The system according to claim 5, wherein the resistance-to-draw of the system is in a range of from about 75 mmWG to about 110 mmWG. ### Claim 7 (depends on 1) The system according to claim 1, wherein the system is configured such that a volume of air that flows through the air flow path is less than the volume of air that flows through the aerosol path. ### Claim 8 (depends on 1) The system according to claim 1, wherein the liquid storage portion comprises, one or more detents extending from an exterior surface of the housing, the one or more detents forming at least a portion of the one or more channels. ### Claim 9 (depends on 1) The system according to claim 1, wherein the cover comprises, one or more detents extending from an interior surface of the cover, the one or more detents forming at least a portion of the one or more channels. ### Claim 10 (depends on 1) The system according to claim 1, wherein the liquid storage portion is replaceable. ### Claim 11 (depends on 1) The system according to claim 1, wherein the liquid storage portion and the heating element are part of a replaceable cartridge. ### Claim 12 (depends on 11) The system according to claim 11, wherein the replaceable cartridge further comprises, a liquid transfer element in contact with the heating element. ### Claim 13 (depends on 10) The system according to claim 10, wherein the system further comprises: a vaporizing unit releasably coupleable to the liquid storage portion, the vaporizing unit including the heating element. ### Claim 14 (depends on 1) The system according to claim 1, wherein the aerosol flow path comprises an aerosol flow path inlet, the one or more air flow paths comprise at least one air flow path inlet, and the air flow inlet and the aerosol flow inlet are the same or different inlets. ### Claim 15 A cover for an aerosol generating system including a consumable liquid supply portion, the cover comprising: a housing; and at least one detent extending from an interior surface of the housing, the at least one detent configured to interact with the liquid storage portion to form one or more air flow channels between the housing and the liquid storage portion when the liquid storage portion and the cover are assembled in the system.